MAX6161–MAX6168 Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References General Description Benefits and Features The MAX6161–MAX6168 are precision, low-dropout, ● ±2mV (max) Initial Accuracy micropower voltage references. These three-terminal ● 5ppm/°C (max) Temperature Coefficient devices operate with an input voltage range from (VOUT ● 5mA Source Current at 0.9mV/mA + 200mV) to 12.6V and are available with output voltage options of 1.25V, 1.8V, 2.048V, 2.5V, 3V, 4.096V, 4.5V, ● 2mA Sink Current at 2.5mV/mA and 5V. They feature a proprietary curvature-correction ● Stable with 1μF Capacitive Loads circuit and laser-trimmed thin-film resistors that result in a ● No External Capacitor Required very low temperature coefficient of 5ppm/°C (max) and an initial accuracy of ±2mV (max). Specifications apply to the ● 100μA (typ) Quiescent Supply Current extended temperature range (-40°C to +85°C). ● 200mV (max) Dropout at 1mA Load Current The MAX6161–MAX6168 typically draw only 100μA of ● Output Voltage Options: 1.25V, 1.8V, 2.048V, 2.5V, supply current and can source 5mA (4mA for MAX6161) 3V, 4.096V, 4.5V, 5V or sink 2mA of load current. Unlike conventional shunt- mode (two-terminal) references that waste supply Applications current and require an external resistor, these devices ● Analog-to-Digital Converters (ADCs) offer a supply current that is virtually independent ● Portable Battery-Powered Systems of the supply voltage (8μA/V variation) and do not ● Notebook Computers require an external resistor. Additionally, the internally ● PDAs, GPS, DMMs compensated devices do not require an external compensation ● Cellular Phones capacitor. Eliminating the external compensation capacitor ● Precision +3V/+5V Systems saves valuable board area in space-critical applications. A low-dropout voltage and a supply-independent, ultra-low supply current make these devices ideal for battery- Ordering Information, Typical Operating Circuit, and operated, high-performance, low-voltage systems. Selector Guide appear at end of data sheet. The MAX6161–MAX6168 are available in 8-pin SO packages. Pin Configuration TOP VIEW + N.C. 1 8 N.C. IN 2 MAX6161– 7 N.C. MAX6168 N.C. 3 6 OUT GND 4 5 N.C. SO 19-1650; Rev 4; 12/08

MAX6161–MAX6168 Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References Absolute Maximum Ratings Voltages Referenced to GND Continuous Power Dissipation (TA = +70°C) IN ..........................................................................-0.3 to +13.5V 8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW OUT ............................................................-0.3V to (VIN + 0.3V) Operating Temperature Range ...........................-40°C to +85°C Output Short-Circuit Duration to GND or IN (VIN ≤ 6V) ....Continuous Storage Temperature Range………….…………-65°C to +150°C Output Short-Circuit Duration to GND or IN (VIN > 6V) ........60s Lead Temperature (soldering, 10s) .................................+300°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics—MAX6161 (VOUT = 1.25V) (VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX6161A 1.248 1.250 1.252 Output Voltage VOUT TA = +25°C V MAX6161B 1.246 1.250 1.254 Output Voltage Temperature MAX6161A 4 10 Coefficient (Note 2) TCVOUT MAX6161B 6 15 ppm/°C Line Regulation ΔΔVVOIUNT/ 2.5V ≤ VIN ≤ 12.6V 12 150 µV/V Load Regulation ΔVOUT/ Sourcing: 0 ≤ IOUT ≤ 4mA 0.5 0.9 mV/mA ΔIOUT Sinking: -2mA ≤ IOUT ≤ 0 1.3 2.5 Short to GND 110 OUT Short-Circuit Current ISC mA Short to IN 25 Long-Term Stability ΔVOUT/ 1000hr at +25°C 115 ppm/ time 1000hr Output Voltage Hysteresis ΔVOUT/ 125 ppm (Note 3) cycle DYNAMIC CHARACTERISTICS f = 0.1Hz to 10Hz 20 µVp-p Noise Voltage eOUT f = 10Hz to 10kHz 15 µVRMS Ripple Rejection VOUT/VIN VIN = +5V ±100mV, f = 120Hz 80 dB Turn-On Settling Time tR VOUT to 0.1% of final value, COUT = 50pF 50 µs INPUT CHARACTERISTICS Supply Voltage Range VIN Guaranteed by line-regulation test 2.5 12.6 V Quiescent Supply Current IIN 125 150 µA Change in Supply Current ΔIIN/ΔVIN 2.5V ≤ VIN ≤ 12.6V 3.2 8.0 µA/V www.maximintegrated.com Maxim Integrated │ 2

MAX6161–MAX6168 Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References Electrical Characteristics—MAX6168 (VOUT = 1.800V) (VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX6168A 1.798 1.800 1.802 Output Voltage VOUT TA = +25°C V MAX6168B 1.795 1.800 1.805 Output Voltage Temperature MAX6168A 2 5 Coefficient (Note 2) TCVOUT MAX6168B 4 10 ppm/°C Line Regulation ΔΔVVOIUNT/ 2.5V ≤ VIN ≥ 12.6V 42 200 µV/V Load Regulation ΔVOUT/ Sourcing: 0 ≤ IOUT ≤ 5mA 0.5 0.9 mV/mA ΔIOUT Sinking: -2mA ≤ IOUT ≤ 0 1.5 4 Short to GND 110 OUT Short-Circuit Current ISC mA Short to IN 25 Long-Term Stability ΔVOUT/ 1000hr at +25°C 80 ppm/ time 1000hr Output Voltage Hysteresis ΔVOUT/ 125 ppm (Note 3) cycle DYNAMIC CHARACTERISTICS f = 0.1Hz to 10Hz 22 µVp-p Noise Voltage eOUT f = 10Hz to 10kHz 25 µVRMS Ripple Rejection ΔVOUT/ΔVIN VIN = +5V ±100mV, f = 120Hz 78 dB Turn-On Settling Time tR VOUT to 0.1% of final value, COUT = 50pF 100 µs INPUT CHARACTERISTICS Supply Voltage Range VIN Guaranteed by line-regulation test 2.5 12.6 V Quiescent Supply Current IIN 100 120 µA Change in Supply Current ΔIIN/ΔVIN 2.5V ≤ VIN ≤ 12.6V 3.4 8.0 µA/V www.maximintegrated.com Maxim Integrated │ 3

MAX6161–MAX6168 Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References Electrical Characteristics—MAX6162 (VOUT = 2.048V) (VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX6162A 2.046 2.048 2.050 Output Voltage VOUT TA = +25°C V MAX6162B 2.043 2.048 2.053 Output Voltage Temperature MAX6162A 2 5 Coefficient (Note 2) TCVOUT MAX6162B 4 10 ppm/°C Line Regulation ΔΔVVOIUNT/ 2.5V ≤ VIN ≤ 12.6V 42 250 µV/V Load Regulation ΔVOUT/ Sourcing: 0 ≤ IOUT ≤ 5mA 0.5 0.9 mV/mA ΔIOUT Sinking: -2mA ≤ IOUT ≤ 0 1.5 4 Short to GND 110 OUT Short-Circuit Current ISC mA Short to IN 25 Long-Term Stability ΔVOUT/ 1000hr at +25°C 80 ppm/ time 1000hr Output Voltage Hysteresis ΔVOUT/ 125 ppm (Note 3) cycle DYNAMIC CHARACTERISTICS f = 0.1Hz to 10Hz 22 µVp-p Noise Voltage eOUT f = 10Hz to 10kHz 25 µVRMS Ripple Rejection VOUT/VIN VIN = 5V ±100mV, f = 120Hz 78 dB Turn-On Settling Time tR VOUT to 0.1% of final value, COUT = 50pF 100 µs INPUT CHARACTERISTICS Supply Voltage Range VIN Guaranteed by line-regulation test 2.5 12.6 V Quiescent Supply Current IIN 100 120 µA Change in Supply Current ΔIIN/ΔVIN 2.5V ≤ VIN ≤ 12.6V 3.4 8.0 µA/V www.maximintegrated.com Maxim Integrated │ 4

MAX6161–MAX6168 Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References Electrical Characteristics—MAX6166 (VOUT = 2.500V) (VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX6166A 2.498 2.500 2.502 Output Voltage VOUT TA = +25°C V MAX6166B 2.495 2.500 2.505 Output Voltage Temperature MAX6166A 2 5 Coefficient (Note 2) TCVOUT MAX6166B 4 10 ppm/°C Dropout Voltage (Note 4) VIN - VOUT IOUT = 1mA 50 200 mV Line Regulation ΔΔVVOIUNT/ VOUT + 0.2V ≤ VIN ≤ 12.6V 60 250 µV/V Load Regulation ΔVOUT/ Sourcing: 0 ≤ IOUT ≤ 5mA 0.5 0.9 mV/mA ΔIOUT Sinking: -2mA ≤ IOUT ≤ 0 1.6 5 Short to GND 110 OUT Short-Circuit Current ISC mA Short to IN 25 Long-Term Stability ΔVOUT/ 1000hr at +25°C 80 ppm/ time 1000hr Output Voltage Hysteresis ΔVOUT/ 125 ppm (Note 3) cycle DYNAMIC CHARACTERISTICS f = 0.1Hz to 10Hz 27 µVp-p Noise Voltage eOUT f = 10Hz to 10kHz 30 µVRMS Ripple Rejection VOUT/VIN VIN = 5V ±100mV, f = 120Hz 76 dB Turn-On Settling Time tR VOUT to 0.1% of final value, COUT = 50pF 115 µs INPUT CHARACTERISTICS Supply Voltage Range VIN Guaranteed by line-regulation test VOUT + 0.2 12.6 V Quiescent Supply Current IIN 100 120 µA Change in Supply Current ΔIIN/ΔVIN VOUT + 0.2V ≤ VIN ≤ 12.6V 3.2 8.0 µA/V www.maximintegrated.com Maxim Integrated │ 5

MAX6161–MAX6168 Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References Electrical Characteristics—MAX6163 (VOUT = 3.000V) (VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX6163A 2.998 3.000 3.002 Output Voltage VOUT TA = +25°C V MAX6163B 2.995 3.000 3.005 Output Voltage Temperature MAX6163A 2 5 Coefficient (Note 2) TCVOUT MAX6163B 4 10 ppm/°C Dropout Voltage (Note 4) VIN - VOUT IOUT = 1mA 50 200 mV Line Regulation ΔΔVVOIUNT/ VOUT + 0.2V ≤ VIN ≤ 12.6V 83 300 µV/V Load Regulation ΔVOUT/ Sourcing: 0 ≤ IOUT ≤ 5mA 0.5 0.9 mV/mA ΔIOUT Sinking: -2mA ≤ IOUT ≤ 0 1.8 5 Short to GND 110 OUT Short-Circuit Current ISC mA Short to IN 25 Long-Term Stability ΔVOUT/ 1000hr at +25°C 80 ppm/ time 1000hr Output Voltage Hysteresis ΔVOUT/ 125 ppm (Note 3) cycle DYNAMIC CHARACTERISTICS f = 0.1Hz to 10Hz 35 µVp-p Noise Voltage eOUT f = 10Hz to 10kHz 40 µVRMS Ripple Rejection VOUT/VIN VIN = 5V ±100mV, f = 120Hz 76 dB Turn-On Settling Time tR VOUT to 0.1% of final value, COUT = 50pF 115 µs INPUT CHARACTERISTICS Supply Voltage Range VIN Guaranteed by line-regulation test VOUT + 0.2 12.6 V Quiescent Supply Current IIN 100 120 µA Change in Supply Current ΔIIN/ΔVIN VOUT + 0.2V ≤ VIN ≤ 12.6V 3.2 8.0 µA/V www.maximintegrated.com Maxim Integrated │ 6

MAX6161–MAX6168 Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References Electrical Characteristics—MAX6164 (VOUT = 4.096V) (VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX6164A 4.094 4.096 4.098 Output Voltage VOUT TA = +25°C V MAX6164B 4.091 4.096 4.101 Output Voltage Temperature MAX6164A 2 5 Coefficient (Note 2) TCVOUT MAX6164B 4 10 ppm/°C Dropout Voltage (Note 4) VIN - VOUT IOUT = 1mA 50 200 mV Line Regulation ΔΔVVOIUNT/ VOUT + 0.2V ≤ VIN ≤ 12.6V 140 300 µV/V Load Regulation ΔVOUT/ Sourcing: 0 ≤ IOUT ≤ 5mA 0.6 0.9 mV/mA ΔIOUT Sinking: -2mA ≤ IOUT ≤ 0 2.0 7.0 Short to GND 110 OUT Short-Circuit Current ISC mA Short to IN 25 Long-Term Stability ΔVOUT/ 1000hr at +25°C 80 ppm/ time 1000hr Output Voltage Hysteresis ΔVOUT/ 125 ppm (Note 3) cycle DYNAMIC CHARACTERISTICS f = 0.1Hz to 10Hz 50 µVp-p Noise Voltage eOUT f = 10Hz to 10kHz 50 µVRMS Ripple Rejection VOUT/VIN VIN = 5V ±100mV, f = 120Hz 72 dB Turn-On Settling Time tR VOUT to 0.1% of final value, COUT = 50pF 190 µs INPUT CHARACTERISTICS Supply Voltage Range VIN Guaranteed by line-regulation test VOUT + 0.2 12.6 V Quiescent Supply Current IIN 100 120 µA Change in Supply Current ΔIIN/ΔVIN VOUT + 0.2V ≤ VIN ≤ 12.6V 3.2 8.0 µA/V www.maximintegrated.com Maxim Integrated │ 7

MAX6161–MAX6168 Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References Electrical Characteristics—MAX6167 (VOUT = 4.500V) (VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX6167A 4.498 4.500 4.502 Output Voltage VOUT TA = +25°C V MAX6167B 4.495 4.500 4.505 Output Voltage Temperature MAX6167A 2 5 Coefficient (Note 2) TCVOUT MAX6167B 4 10 ppm/°C Dropout Voltage (Note 4) VIN - VOUT IOUT = 1mA 50 200 mV Line Regulation ΔΔVVOIUNT/ VOUT + 0.2V ≤ VIN ≤ 12.6V 160 450 µV/V Load Regulation ΔVOUT/ Sourcing: 0 ≤ IOUT ≤ 5mA 0.6 0.9 mV/mA ΔIOUT Sinking: -2mA ≤ IOUT ≤ 0 2.3 8.0 Short to GND 110 OUT Short-Circuit Current ISC mA Short to IN 25 Long-Term Stability ΔVOUT/ 1000hr at +25°C 80 ppm/ time 1000hr Output Voltage Hysteresis ΔVOUT/ 125 ppm (Note 3) cycle DYNAMIC CHARACTERISTICS f = 0.1Hz to 10Hz 55 µVp-p Noise Voltage eOUT f = 10Hz to 10kHz 55 µVRMS Ripple Rejection VOUT/VIN VIN = 5V ±100mV, f = 120Hz 70 dB Turn-On Settling Time tR VOUT to 0.1% of final value, COUT = 50pF 230 µs INPUT CHARACTERISTICS Supply Voltage Range VIN Guaranteed by line-regulation test VOUT + 0.2 12.6 V Quiescent Supply Current IIN 100 120 µA Change in Supply Current ΔIIN/ΔVIN VOUT + 0.2V ≤ VIN ≤ 12.6V 3.1 8.0 µA/V www.maximintegrated.com Maxim Integrated │ 8

MAX6161–MAX6168 Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References Electrical Characteristics—MAX6165 (VOUT = 5.000V) (VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX6165A 4.998 5.000 5.002 Output Voltage VOUT TA = +25°C V MAX6165B 4.995 5.000 5.005 Output Voltage Temperature MAX6165A 2 5 Coefficient (Note 2) TCVOUT MAX6165B 4 10 ppm/°C Dropout Voltage (Note 4) VIN - VOUT IOUT = 1mA 50 200 mV Line Regulation ΔΔVVOIUNT/ VOUT + 0.2V ≤ VIN ≤ 12.6V 180 400 µV/V Load Regulation ΔVOUT/ Sourcing: 0 ≤ IOUT ≤ 5mA 0.6 0.9 mV/mA ΔIOUT Sinking: -2mA ≤ IOUT ≤ 0 2.4 8.0 Short to GND 110 mA OUT Short-Circuit Current ISC Short to IN 25 Long-Term Stability ΔVOUT/ 1000hr at +25°C 80 ppm/ time 1000hr Output Voltage Hysteresis ΔVOUT/ 125 ppm (Note 3) cycle DYNAMIC CHARACTERISTICS f = 0.1Hz to 10Hz 60 µVp-p Noise Voltage eOUT f = 10Hz to 10kHz 60 µVRMS Ripple Rejection VOUT/VIN VIN = 5.5V ±100mV, f = 120Hz 65 dB Turn-On Settling Time tR VOUT to 0.1% of final value, COUT = 50pF 300 µs INPUT CHARACTERISTICS Supply Voltage Range VIN Guaranteed by line-regulation test VOUT + 0.2 12.6 V Quiescent Supply Current IIN 100 120 µA Change in Supply Current ΔIIN/ΔVIN VOUT + 0.2V ≤ VIN ≤ 12.6V 3.1 8.0 µA/V Note 1: 100% production tested at TA = +25°C. Guaranteed by design for TA = -40°C to +85°C. Note 2: Temperature Coefficient is specified by the “box” method; i.e., the maximum ΔVOUT is divided by the maximum ΔT. Note 3: Thermal Hysteresis is defined as the change in TA = +25°C output voltage before and after temperature cycling of the device (from TA = TMIN to TMAX). Initial measurement at TA = +25°C is followed by temperature cycling the device to TA = +85°C then to TA = -40°C, and another measurement at TA = +25°C is compared to the original measurement at TA = +25°C. Note 4: Dropout voltage is the minimum input voltage at which VOUT changes ≤ 0.2% from VOUT at VIN = 5.0V (VIN = 5.5V for MAX6165). www.maximintegrated.com Maxim Integrated │ 9

MAX6161–MAX6168 Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References Typical Operating Characteristics (VIN = +5V for MAX6161–MAX6168, VIN = +5.5V for MAX6165, IOUT = 0, TA = +25°C, unless otherwise noted.) (Note 5) MAX6161 MAX6165 MAX6161 OUTPUT VOLTAGE TEMPERATURE DRIFT OUTPUT VOLTAGE TEMPERATURE DRIFT LONG-TERM DRIFT V)111...222555000345 MAX6161/68 toc01 V)555...000000112050 3 TYPICAL PARTS MAX6161/68 toc02 456000 MAX6161/68 toc03 E (1.2502 E ( 30 PUT VOLTAG111...222455900901 PUT VOLTAG455...900900900505 DRIFT (ppm) 12000 T T OU1.2498 3 TYPICAL PARTS OU -10 4.9990 1.2497 -20 4.9985 1.2496 -30 1.2495 4.9980 -40 -40 -25 -10 0 10 25 40 55 70 85 -40 -25 -10 0 10 25 40 55 70 85 0 192 384 576 768 960 TEMPERATURE (°C) TEMPERATURE (°C) TIME (hrs) MAX6165 MAX6161 MAX6165 LONG-TERM DRIFT LINE REGULATION LINE REGULATION --21000 MAX6161/68 toc04 E (µV) 230000 TA = +25°C MAX6161/68 toc05 E (µV)2000 TA = -40°C MAX6161/68 toc06 -30 ANG 100 ANG-200 RIFT (ppm) --5400 LTAGE CH 0 TA = -40°C TA = +85°C LTAGE CH--640000 TA = +85°C D -60 VO VO TA = +25°C -70 UT -100 UT -800 P P T T -80 U U O-200 O-1000 -90 -100 -300 -1200 0 192 384 576 768 960 2 4 6 8 10 12 5 7 9 11 13 TIME (hrs) INPUT VOLTAGE (V) INPUT VOLTAGE (V) MAX6166 MAX6161 MAX6165 DROPOUT VOLTAGE LOAD REGULATION LOAD REGULATION vs. LOAD CURRENT ANGE (mV) 345 TA = +85°C MAX6161/68 toc07 ANGE (mV) 118602 TA = +85°C MAX6161/68 toc08 GE (V)000...223050 TA = +85°C MAX6161/68 toc09 H 2 H A LTAGE C 1 TA = -40°C LTAGE C 24 TA = +25°C UT VOLT0.15 TA = +25°C VO 0 TA = +25°C VO PO UTPUT -1 UTPUT -02 DRO0.10 TA = -40°C O O 0.05 -2 -4 TA = -40°C -3 -6 0 -4 -2 0 2 4 -6 -4 -2 0 2 4 6 0 1 2 3 4 5 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) www.maximintegrated.com Maxim Integrated │ 10

MAX6161–MAX6168 Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References Typical Operating Characteristics (continued) (VIN = +5V for MAX6161–MAX6168, VIN = +5.5V for MAX6165, IOUT = 0, TA = +25°C, unless otherwise noted.) (Note 5) MAX6165 MAX6161 MAX6165 DROPOUT VOLTAGE POWER-SUPPLY REJECTION RATIO POWER-SUPPLY REJECTION RATIO vs. LOAD CURRENT vs. FREQUENCY vs. FREQUENCY V)00..2205 TA = +85°C MAX6161/68 toc10 --12000 MAX6161/68 toc11 --21000 MAX6161/68 toc12 GE ( -30 OUT VOLTA00..1150 TA = +25°C TA = -40°C PSRR (dB) --4500 PSRR (dB) --4300 P -50 O -60 R D -70 -60 0.05 -80 -70 0 -90 -80 0 1 2 3 4 5 0.001 0.01 0.1 1 10 100 1000 0.001 0.1 10 1000 LOAD CURRENT (mA) FREQUENCY (kHz) FREQUENCY (kHz) MAX6161 MAX6165 MAX6161 SUPPLY CURRENT vs. SUPPLY VOLTAGE SUPPLY CURRENT vs. SUPPLY VOLTAGE SUPPLY CURRENT vs. TEMPERATURE SUPPLY CURRENT (µA) 111111112344567842086420 TA =T A+ 8=5 +°2C5°C MAX6161/68 toc13 SUPPLY CURRENT (µA) 111111110122334584062840 TTAA = = + +8255°C°C MAX6161/68 toc14 SUPPLY CURRENT (µA) 111111112344567842086420 VVCCCC = = + +152V.6V MAX6161/68 toc15 116 TA = -40°C 102 116 108 96 TA = -40°C 108 VCC = +2.5V 100 90 100 2 4 6 8 10 12 14 5 6 7 8 9 10 11 12 13 14 -40 -15 10 35 60 85 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) TEMPERATURE (°C) MAX6161 MAX6165 MAX6165 OUTPUT IMPEDANCE OUTPUT IMPEDANCE SUPPLY CURRENT vs. TEMPERATURE vs. FREQUENCY vs. FREQUENCY NT (µA) 111133452840 MAX6161/68 toc16 NCE (Ω) 111224680200000 MAX6161/68 toc17 NCE (Ω) 111182460000 MAX6161/68 toc18 E 126 A A RR ED 120 ED 100 SUPPLY CU 111012840 VCC = +12.6V OUTPUT IMP 1680000 OUTPUT IMP 6800 102 40 40 VCC = +5.2V 96 20 20 90 0 0 -40 -15 10 35 60 85 0.001 0.1 10 1000 0.001 0.1 10 1000 TEMPERATURE (°C) FREQUENCY (kHz) FREQUENCY (kHz) www.maximintegrated.com Maxim Integrated │ 11

MAX6161–MAX6168 Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References Typical Operating Characteristics (continued) (VIN = +5V for MAX6161–MAX6168, VIN = +5.5V for MAX6165, IOUT = 0, TA = +25°C, unless otherwise noted.) (Note 5) MAX6161 MAX6165 0.1Hz TO 10Hz OUTPUT NOISE NOISE MAX6161/68 toc19 MAX6161/68 toc20 VOUT VOUT 10µV/div 10µV/div 1s/div 1s/div MAX6161 MAX6165 TURN-ON TRANSIENT TURN-ON TRANSIENT (CL = 50pF) (CL = 50pF) VIN MAX6161/68 toc21 5V/VdIiNv MAX6161/67 toc22 5V/div VOUT 500mV/div VOUT 2V/div 10µs/div 40µs/div MAX6161 MAX6165 LOAD TRANSIENT LOAD TRANSIENT (IOUT = ±250µA, VIN = 5.0, CL = 0) (IOUT = ±250µA, CL = 0, VIN = 5.5V) MAX6161/68 toc23 MAX6161/68 toc24 IOUT +250µA IOUT +250µA 500µA/div -250µA 500µA/div -250µA VOUT VOUT AC-COUPLED AC-COUPLED 100mV/div 50mV/div 400µs/div 400µs/div www.maximintegrated.com Maxim Integrated │ 12

MAX6161–MAX6168 Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References Typical Operating Characteristics (continued) (VIN = +5V for MAX6161–MAX6168, VIN = +5.5V for MAX6165, IOUT = 0, TA = +25°C, unless otherwise noted.) (Note 5) MAX6161 MAX6165 LOAD TRANSIENT LOAD TRANSIENT (IOUT = ±250µA, VIN = 5.0V, CL = 1µF) (IOUT = ±250µA, CL = 1µF, VIN = 5.5V) MAX6161/68 toc25 MAX6161/68 toc26 +250µA +250µA IOUT IOUT 500µA/div -250µA 500µA/div -250µA VOUT VOUT AC-COUPLED AC-COUPLED 10mV/div 20mV/div 400µs/div 400µs/div MAX6161 MAX6165 LOAD TRANSIENT LOAD TRANSIENT (VIN = 5.0V, CL = 0, IOUT = ±2mA) (CL = 0, IOUT = ±2mA, VIN = 5.5V) MAX6161/68 toc27 MAX6161/68 toc28 +2mA +2mA IOUT IOUT 5mA/div -2mA 5mA/div -2mA VOUT VOUT AC-COUPLED AC-COUPLED 100mV/div 50mV/div 400µs/div 400µs/div MAX6161 MAX6165 LOAD TRANSIENT LOAD TRANSIENT (VIN = 5.0V, CL = 1µF, IOUT = ±2mA) (CL = 1µF, IOUT = ±2mA, VIN = 5.5V) MAX6161/68 toc29 MAX6161/68 toc30 +2mA +2mA IOUT IOUT 5mA/div -2mA 5mA/div -2mA VOUT VOUT AC-COUPLED AC-COUPLED 50mV/div 20mV/div 400µs/div 400µs/div www.maximintegrated.com Maxim Integrated │ 13

MAX6161–MAX6168 Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References Typical Operating Characteristics (continued) (VIN = +5V for MAX6161–MAX6168, VIN = +5.5V for MAX6165, IOUT = 0, TA = +25°C, unless otherwise noted.) (Note 5) MAX6161 MAX6165 LOAD TRANSIENT LOAD TRANSIENT (VIN = 5.0V, CL = 0, IOUT = ±4mA) (IOUT = ±5mA, CL = 0, VIN = 5.5V) MAX6161/68 toc31 MAX6161/68 toc32 +4mA +5mA IOUT IOUT 5mA/div 5mA/div -4mA -5mA VOUT VOUT AC-COUPLED AC-COUPLED 200mV/div 100mV/div 400µs/div 400µs/div MAX6161 MAX6165 LOAD TRANSIENT LOAD TRANSIENT (VIN = 5.0V, CL = 1µF, IOUT = ±4mA) (IOUT = ±5mA, CL = 1µF, VIN = 5.5V) MAX6161/68 toc33 MAX6161/68 toc34 +4mA +5mA IOUT IOUT 5mA/div 5mA/div -4mA -5mA VOUT VOUT AC-COUPLED AC-COUPLED 50mV/div 50mV/div 400µs/div 400µs/div MAX6161 MAX6165 LINE TRANSIENT LINE TRANSIENT (CL = 0) (CL = 0) MAX6161/68 toc35 MAX6161/68 toc36 +0.25V +0.25V VIN VIN 500mV/div -0.25V 500mV/div -0.25V VOUT VOUT AC-COUPLED AC-COUPLED 20mV/div 20mV/div 40µs/div 40µs/div Note 5: Many of the Typical Operating Characteristics of the MAX6161 family are extremely similar. The extremes of these characteristics are found in the MAX6161 (1.25V output) and the MAX6165 (5.0V output). The Typical Operating Characteristics of the remainder of the MAX6161 family typically lie between these two extremes and can be estimated based on their output voltages. www.maximintegrated.com Maxim Integrated │ 14

MAX6161–MAX6168 Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References Pin Description PIN NAME FUNCTION 1, 3, 5, 7, 8 N.C. No Connection. Not internally connected. 2 IN Input Voltage 4 GND Ground 6 OUT Reference Output Applications Information Output Voltage Hysteresis Output voltage hysteresis is the change in the input Input Bypassing voltage at T = +25°C before and after the device is cycled A For the best line-transient performance, decouple the over its entire operating temperature range. Hysteresis is input with a 0.1μF ceramic capacitor as shown in the caused by differential package stress appearing across Typical Operating Circuit. Locate the capacitor as close the bandgap core transistors. The typical temperature to IN as possible. When transient performance is less hysteresis value is 125ppm. important, no capacitor is necessary. Turn-On Time Output/Load Capacitance These devices typically turn on and settle to within 0.1% Devices in the MAX6161 family do not require an output of their final value in 50μs to 300μs, depending on the capacitor for frequency stability. In applications where the output voltage (see electrical table of part used). load or the supply can experience step changes, an out- The turn-on time can increase up to 1.5ms with the put capacitor of at least 0.1μF will reduce the amount of device operating at the minimum dropout voltage and the overshoot (undershoot) and improve the circuit’s transient maximum load. response. Many applications do not require an external capacitor, and the MAX6161 family can offer a significant Typical Operating Circuit advantage in applications when board space is critical. Supply Current +SUPPLY INPUT (SEE SELECTOR GUIDE) The quiescent supply current of the series-mode MAX6161 family is typically 100μA and is virtually independent of the supply voltage, with only an 8μA/V (max) variation with IN supply voltage. Unlike series references, shunt-mode OUT REFERENCE OUT references operate with a series resistor connected to 0.1µF* MAX6161– the power supply. The quiescent current of a shunt- MAX6168 mode reference is thus a function of the input voltage. Additionally, shunt-mode references have to be biased 1µF* at the maximum expected load current, even if the load GND current is not present at the time. In the MAX6161 family, the load current is drawn from the input voltage only when required, so supply current is not wasted and efficiency is maximized at all input voltages. This improved efficiency *CAPACITORS ARE OPTIONAL. reduces power dissipation and extends battery life. When the supply voltage is below the minimum specified input voltage (as during turn-on), the devices can draw up Chip Information to 400μA beyond the nominal supply current. The input voltage source must be capable of providing this current TRANSISTOR COUNT: 117 to ensure reliable turn-on. PROCESS: BiCMOS www.maximintegrated.com Maxim Integrated │ 15

MAX6161–MAX6168 Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References Selector Guide TEMPERATURE OUTPUT VOLTAGE INITIAL ACCURACY PART COEFFICIENT (V) (mV) (ppm/°C) MAX6161A 1.250 ±2 10 MAX6161B 1.250 ±4 15 MAX6168A 1.800 ±2 5 MAX6168B 1.800 ±5 10 MAX6162A 2.048 ±2 5 MAX6162B 2.048 ±5 10 MAX6166A 2.500 ±2 5 MAX6166B 2.500 ±5 10 MAX6163A 3.000 ±2 5 MAX6163B 3.000 ±5 10 MAX6164A 4.096 ±2 5 MAX6164B 4.096 ±5 10 MAX6167A 4.500 ±2 5 MAX6167B 4.500 ±5 10 MAX6165A 5.000 ±2 5 MAX6165B 5.000 ±5 10 Ordering Information Package Information For the latest package outline information and land patterns (foot- PIN- OUTPUT PART* TEMP RANGE prints), go to www.maximintegrated.com/packages. Note that PACKAGE VOLTAGE (V) a “+”, “#”, or “-” in the package code indicates RoHS status only. MAX6161_ESA+ -40°C to +85°C 8 SO 1.250 Package drawings may show a different suffix character, but the MAX6162_ESA+ -40°C to +85°C 8 SO 2.048 drawing pertains to the package regardless of RoHS status. MAX6163_ESA+ -40°C to +85°C 8 SO 3.000 PACKAGE PACKAGE OUTLINE LAND TYPE CODE NO. PATTERN NO. MAX6164_ESA+ -40°C to +85°C 8 SO 4.096 8 SO S8+2 21-0041 90-0096 MAX6165_ESA+ -40°C to +85°C 8 SO 5.000 MAX6166_ESA+ -40°C to +85°C 8 SO 2.500 MAX6167_ESA+ -40°C to +85°C 8 SO 4.500 MAX6168_ESA+ -40°C to +85°C 8 SO 1.800 +Denotes a lead(Pb)-free package/RoHS-compliant package. *Insert the code for the desired initial accuracy and temperature coefficient (from the Selector Guide) in the blank to complete the part number. Note: For leaded version, contact factory. www.maximintegrated.com Maxim Integrated │ 16

MAX6161–MAX6168 Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References Revision History REVISION REVISION PAGES DESCRIPTION NUMBER DATE CHANGED 4 12/08 Updated part numbers in Ordering Information table 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2008 Maxim Integrated Products, Inc. │ 17