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19-1650; Rev 2; 2/02
Precision, Micropower, Low-Dropout, HighOutput-Current, SO-8 Voltage References
General Description
The MAX6161-MAX6168 are precision, low-dropout, micropower voltage references. These three-terminal devices operate with an input voltage range from (VOUT + 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, and 5V. They feature a proprietary curvature-correction circuit and laser-trimmed thin-film resistors that result in a very low temperature coefficient of 5ppm/C (max) and an initial accuracy of 2mV (max). Specifications apply to the extended temperature range (-40C to +85C). The MAX6161-MAX6168 typically draw only 90A of supply current and can source 5mA (4mA for MAX6161) or sink 2mA of load current. Unlike conventional shunt-mode (two-terminal) references that waste supply current and require an external resistor, these devices offer a supply current that is virtually independent of the supply voltage (8A/V variation) and do not require an external resistor. Additionally, the internally compensated devices do not require an external compensation capacitor. Eliminating the external compensation capacitor 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-operated, high-performance, low-voltage systems. The MAX6161-MAX6168 are available in 8-pin SO packages.
____________________________Features
o 2mV (max) Initial Accuracy o 5ppm/C (max) Temperature Coefficient o 5mA Source Current at 0.9mV/mA o 2mA Sink Current at 2.5mV/mA o Stable with 1F Capacitive Loads o No External Capacitor Required o 90A (typ) Quiescent Supply Current o 200mV (max) Dropout at 1mA Load Current o 60V/V Line Regulation o Output Voltage Options: 1.25V, 1.8V, 2.048V, 2.5V, 3V, 4.096V, 4.5V, 5V
MAX6161-MAX6168
Ordering Information
PART* MAX6161_ESA MAX6162_ESA MAX6163_ESA MAX6164_ESA MAX6165_ESA MAX6166_ESA MAX6167_ESA MAX6168_ESA TEMP RANGE -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C PINPACKAGE 8 SO 8 SO 8 SO 8 SO 8 SO 8 SO 8 SO 8 SO OUTPUT VOLTAGE (V) 1.250 2.048 3.000 4.096 5.000 2.500 4.500 1.800
________________________Applications
Analog-to-Digital Converters (ADCs) Portable Battery-Powered Systems Notebook Computers PDAs, GPS, DMMs Cellular Phones Precision +3V/+5V Systems
*Insert the code for the desired initial accuracy and temperature coefficient (from the Selector Guide) in the blank to complete the part number.
___________________Pin Configuration
TOP VIEW
N.C. IN N.C.
1 2 3
8 7
N.C. N.C. OUT N.C.
MAX6161- MAX6168
6 5
GND 4
Typical Operating Circuit and Selector Guide appear at end of data sheet.
SO
________________________________________________________________ Maxim Integrated Products
1
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Precision, Micropower, Low-Dropout, HighOutput-Current, SO-8 Voltage References MAX6161-MAX6168
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to GND IN ........................................................................-0.3 to +13.5V OUT.................. ........................................-0.3V to (VIN + 0.3V) Output Short-Circuit Duration to GND or IN (VIN 6V) ...Continuous Output Short-Circuit Duration to GND or IN (VIN > 6V)..............60s Continuous Power Dissipation (TA = +70C) 8-Pin SO (derate 5.88mW/C above +70C)...............471mW Operating Temperature Range ...........................-40C to +85C Storage Temperature Range.........................-65C to +150C Lead Temperature (soldering, 10s)............................+300C
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 = +25C.)
PARAMETER Output Voltage Output Voltage Temperature Coefficient (Note 1) Line Regulation Load Regulation OUT Short-Circuit Current Long-Term Stability Output Voltage Hysteresis (Note 2) DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time INPUT CHARACTERISTICS Supply Voltage Range Quiescent Supply Current Change in Supply Current VIN IIN IIN/VIN 2.5V < VIN < 12.6V Guaranteed by line-regulation test 2.5 90 3.2 12.6 120 8.0 V A A/V eOUT VOUT/VIN tR f = 0.1Hz to 10Hz f = 10Hz to 10kHz VIN = +5V 100mV, f = 120Hz VOUT to 0.1% of final value, COUT = 50pF 20 15 80 50 Vp-p VRMS dB s SYMBOL VOUT TCVOUT VOUT/ VIN VOUT/ IOUT ISC VOUT/ time VOUT/ cycle TA = +25C MAX6161A MAX6161B 2.5V < VIN < 12.6V Sourcing: 0 < IOUT < 4mA Sinking: -2mA < IOUT < 0 Short to GND Short to IN 1000hr at +25C CONDITIONS MAX6161A MAX6161B MIN 1.248 1.246 TYP 1.250 1.250 4 6 6 0.5 1.3 110 25 80 80 MAX 1.252 1.254 10 15 60 0.9 2.5 UNITS V ppm/C V/V mV/mA mA ppm/ 1000hr ppm
2
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Precision, Micropower, Low-Dropout, HighOutput-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 = +25C.)
PARAMETER Output Voltage Output Voltage Temperature Coefficient (Note 1) Line Regulation Load Regulation OUT Short-Circuit Current Long-Term Stability Output Voltage Hysteresis (Note 2) DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time INPUT CHARACTERISTICS Supply Voltage Range Quiescent Supply Current Change in Supply Current VIN IIN IIN/VIN 2.5V < VIN < 12.6V Guaranteed by line-regulation test 2.5 90 3.4 12.6 120 8.0 V A A/V eOUT VOUT/ VIN tR f = 0.1Hz to 10Hz f = 10Hz to 10kHz VIN = +5V 100mV, f = 120Hz VOUT to 0.1% of final value, COUT = 50pF 22 25 78 100 Vp-p VRMS dB s SYMBOL VOUT TCVOUT VOUT/ VIN VOUT/ IOUT ISC VOUT/ time VOUT/ cycle TA = +25C MAX6168A MAX6168B 2.5V VIN 12.6V Sourcing: 0 < IOUT < 5mA Sinking: -2mA < IOUT < 0 Short to GND Short to IN 1000hr at +25C CONDITIONS MAX6168A MAX6168B MIN 1.798 1.795 TYP 1.800 1.800 2 4 42 0.5 1.5 110 25 80 80 MAX 1.802 1.805 5 10 200 0.9 4 UNITS V ppm/C V/V mV/mA mA ppm/ 1000hr ppm
MAX6161-MAX6168
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Precision, Micropower, Low-Dropout, HighOutput-Current, SO-8 Voltage References MAX6161-MAX6168
ELECTRICAL CHARACTERISTICS--MAX6162 (VOUT = 2.048V)
(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25C.)
PARAMETER Output Voltage Output Voltage Temperature Coefficient (Note 1) Line Regulation Load Regulation OUT Short-Circuit Current Long-Term Stability Output Voltage Hysteresis (Note 2) DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time INPUT CHARACTERISTICS Supply Voltage Range Quiescent Supply Current Change in Supply Current VIN IIN IIN/VIN Guaranteed by line-regulation test 2.5V < VIN < 12.6V 2.5 90 3.4 12.6 120 8.0 V A A/V eOUT VOUT/VIN tR f = 0.1Hz to 10Hz f = 10Hz to 10kHz VIN = 5V 100mV, f = 120Hz VOUT to 0.1% of final value, COUT = 50pF 22 25 78 100 Vp-p VRMS dB s SYMBOL VOUT TCVOUT VOUT/ VOUT/ IOUT ISC VOUT/ time VOUT/ cycle TA = +25C MAX6162A MAX6162B 2.5V < VIN < 12.6V Sourcing: 0 < IOUT < 5mA Sinking: -2mA < IOUT < 0 Short to GND Short to IN 1000hr at +25C CONDITIONS MAX6162A MAX6162B MIN 2.046 2.043 TYP 2.048 2.048 2 4 42 0.5 1.5 110 25 80 80 MAX 2.050 2.053 5 10 200 0.9 4 UNITS V ppm/C V/V mV/mA mA ppm/ 1000hr ppm
4
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Precision, Micropower, Low-Dropout, HighOutput-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 = +25C.)
PARAMETER Output Voltage Output Voltage Temperature Coefficient (Note 1) Dropout Voltage (Note 3) Line Regulation Load Regulation OUT Short-Circuit Current Long-Term Stability Output Voltage Hysteresis (Note 2) DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time INPUT CHARACTERISTICS Supply Voltage Range Quiescent Supply Current Change in Supply Current VIN IIN IIN/VIN VOUT + 0.2V < VIN < 12.6V Guaranteed by line-regulation test VOUT + 0.2 90 3.2 12.6 120 8.0 V A A/V eOUT VOUT/VIN tR f = 0.1Hz to 10Hz f = 10Hz to 10kHz VIN = 5V 100mV, f = 120Hz VOUT to 0.1% of final value, COUT = 50pF 27 30 76 115 Vp-p VRMS dB s SYMBOL VOUT TCVOUT TA = +25C MAX6166A MAX6166B CONDITIONS MAX6166A MAX6166B MIN 2.498 2.495 TYP 2.500 2.500 2 4 50 60 0.5 1.6 110 25 80 80 MAX 2.502 2.505 5 10 200 220 0.9 5 UNITS V ppm/C mV V/V mV/mA mA ppm/ 1000hr ppm
MAX6161-MAX6168
VIN - VOUT IOUT = 1mA VOUT/ VIN VOUT/ IOUT ISC VOUT/ time VOUT/ cycle VOUT + 0.2V < VIN < 12.6V Sourcing: 0 < IOUT < 5mA Sinking: -2mA < IOUT < 0 Short to GND Short to IN 1000hr at +25C
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Precision, Micropower, Low-Dropout, HighOutput-Current, SO-8 Voltage References MAX6161-MAX6168
ELECTRICAL CHARACTERISTICS--MAX6163 (VOUT = 3.000V)
(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25C.)
PARAMETER Output Voltage Output Voltage Temperature Coefficient (Note 1) Dropout Voltage (Note 3) Line Regulation Load Regulation OUT Short-Circuit Current Long-Term Stability Output Voltage Hysteresis (Note 2) DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time INPUT CHARACTERISTICS Supply Voltage Range Quiescent Supply Current Change in Supply Current VIN IIN IIN/VIN VOUT + 0.2V < VIN < 12.6V Guaranteed by line-regulation test VOUT + 0.2 90 3.2 12.6 120 8.0 V A A/V eOUT VOUT/VIN tR f = 0.1Hz to 10Hz f = 10Hz to 10kHz VIN = 5V 100mV, f = 120Hz VOUT to 0.1% of final value, COUT = 50pF 35 40 76 115 Vp-p VRMS dB s SYMBOL VOUT TCVOUT TA = +25C MAX6163A MAX6163B CONDITIONS MAX6163A MAX6163B MIN 2.998 2.995 TYP 3.000 3.000 2 4 50 83 0.5 1.8 110 25 80 80 MAX 3.002 3.005 5 10 200 300 0.9 5 UNITS V ppm/C mV V/V mV/mA mA ppm/ 1000hr ppm
VIN - VOUT IOUT = 1mA VOUT/ VIN VOUT/ IOUT ISC VOUT/ time VOUT/ cycle VOUT + 0.2V < VIN < 12.6V Sourcing: 0 < IOUT < 5mA Sinking: -2mA < IOUT < 0 Short to GND Short to IN 1000hr at +25C
6
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Precision, Micropower, Low-Dropout, HighOutput-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 = +25C.)
PARAMETER Output Voltage Output Voltage Temperature Coefficient (Note 1) Dropout Voltage (Note 3) Line Regulation Load Regulation OUT Short-Circuit Current Long-Term Stability Output Voltage Hysteresis (Note 2) DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time INPUT CHARACTERISTICS Supply Voltage Range Quiescent Supply Current Change in Supply Current VIN IIN IIN/VIN VOUT + 0.2V < VIN < 12.6V Guaranteed by line-regulation test VOUT + 0.2 90 3.2 12.6 120 8.0 V A A/V eOUT VOUT/VIN tR f = 0.1Hz to 10Hz f = 10Hz to 10kHz VIN = 5V 100mV, f = 120Hz VOUT to 0.1% of final value, COUT = 50pF 50 50 72 190 Vp-p VRMS dB s SYMBOL VOUT TCVOUT TA = +25C MAX6164A MAX6164B CONDITIONS MAX6164A MAX6164B MIN 4.094 4.091 TYP 4.096 4.096 2 4 50 140 0.6 2.0 110 25 80 80 MAX 4.098 4.101 5 10 200 300 0.9 7.0 UNITS V ppm/C mV V/V mV/mA mA ppm/ 1000hr ppm
MAX6161-MAX6168
VIN - VOUT IOUT = 1mA VOUT/ VIN VOUT/ IOUT ISC VOUT/ time VOUT/ cycle VOUT + 0.2V < VIN < 12.6V Sourcing: 0 < IOUT < 5mA Sinking: -2mA < IOUT < 0 Short to GND Short to IN 1000hr at +25C
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Precision, Micropower, Low-Dropout, HighOutput-Current, SO-8 Voltage References MAX6161-MAX6168
ELECTRICAL CHARACTERISTICS--MAX6167 (VOUT = 4.500V)
(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25C.)
PARAMETER Output Voltage Output Voltage Temperature Coefficient (Note 1) Dropout Voltage (Note 3) Line Regulation Load Regulation OUT Short-Circuit Current Long-Term Stability Output Voltage Hysteresis (Note 2) DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time INPUT CHARACTERISTICS Supply Voltage Range Quiescent Supply Current Change in Supply Current VIN IIN IIN/VIN VOUT + 0.2V < VIN < 12.6V Guaranteed by line-regulation test VOUT + 0.2 90 3.1 12.6 120 8.0 V A A/V eOUT VOUT/VIN tR f = 0.1Hz to 10Hz f = 10Hz to 10kHz VIN = 5V 100mV, f = 120Hz VOUT to 0.1% of final value, COUT = 50pF 55 55 70 230 Vp-p VRMS dB s SYMBOL VOUT TCVOUT TA = +25C MAX6167A MAX6167B CONDITIONS MAX6167A MAX6167B MIN 4.498 4.495 TYP 4.500 4.500 2 4 50 160 0.6 2.3 110 25 80 80 MAX 4.502 4.505 5 10 200 450 0.9 8.0 UNITS V ppm/C mV V/V mV/mA mA ppm/ 1000hr ppm
VIN - VOUT IOUT = 1mA VOUT/ VIN VOUT/ IOUT ISC VOUT/ time VOUT/ cycle VOUT + 0.2V < VIN < 12.6V Sourcing: 0 < IOUT < 5mA Sinking: -2mA < IOUT < 0 Short to GND Short to IN 1000hr at +25C
8
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Precision, Micropower, Low-Dropout, HighOutput-Current, SO-8 Voltage References
ELECTRICAL CHARACTERISTICS--MAX6165 (VOUT = 5.000V)
(VIN = +5.5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25C.)
PARAMETER Output Voltage Output Voltage Temperature Coefficient (Note 1) Dropout Voltage (Note 3) Line Regulation Load Regulation OUT Short-Circuit Current Long-Term Stability Output Voltage Hysteresis (Note 2) DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time INPUT CHARACTERISTICS Supply Voltage Range Quiescent Supply Current Change in Supply Current VIN IIN IIN/VIN VOUT + 0.2V < VIN < 12.6V Guaranteed by line-regulation test VOUT + 0.2 90 3.1 12.6 120 8.0 V A A/V eOUT VOUT/VIN tR f = 0.1Hz to 10Hz f = 10Hz to 10kHz VIN = 5.5V 100mV, f = 120Hz VOUT to 0.1% of final value, COUT = 50pF 60 60 65 300 Vp-p VRMS dB s SYMBOL VOUT TCVOUT VIN - VOUT VOUT/ VOUT/ IOUT ISC VOUT/ time VOUT/ cycle TA = +25C MAX6165A MAX6165B IOUT = 1mA VOUT + 0.2V < VIN < 12.6V Sourcing: 0 < IOUT < 5mA Sinking: -2mA < IOUT < 0 Short to GND Short to IN 1000hr at +25C CONDITIONS MAX6165A MAX6165B MIN 4.998 4.995 TYP 5.000 5.000 2 4 50 180 0.6 2.4 110 25 80 80 ppm/ 1000hr ppm MAX 5.002 5.005 5 10 200 400 0.9 8.0 UNITS V ppm/C mV V/V mV/mA mA
MAX6161-MAX6168
Note 1: Temperature Coefficient is specified by the "box" method; i.e., the maximum VOUT is divided by the maximum T. Note 2: Thermal Hysteresis is defined as the change in TA = +25C output voltage before and after temperature cycling of the device (from TA = TMIN to TMAX). Initial measurement at TA = +25C is followed by temperature cycling the device to TA = +85C then to TA = -40C, and another measurement at TA = +25C is compared to the original measurement at TA = +25C. Note 3: Dropout voltage is the minimum input voltage at which VOUT changes 0.2% from VOUT at VIN = 5.0V (VIN = 5.5V for MAX6165).
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Precision, Micropower, Low-Dropout, HighOutput-Current, SO-8 Voltage References MAX6161-MAX6168
Typical Operating Characteristics
(VIN = +5V for MAX6161-MAX6168, VIN = +5.5V for MAX6165, IOUT = 0, TA = +25C, unless otherwise noted.) (Note 4)
MAX6162 OUTPUT VOLTAGE TEMPERATURE DRIFT
MAX6161/68 toc01
MAX6165 OUTPUT VOLTAGE TEMPERATURE DRIFT
MAX6161/68 toc02
MAX6161 PPM vs. TIME
MAX6161/68 toc03
2.049
5.003
35 30 25
5.002 OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
5.001 PPM 5.000 4.999 THREE TYPICAL PARTS 4.998
20 15 10 5 0
2.048
THREE TYPICAL PARTS 2.047 -40 -15 10 35 60 65 TEMPERATURE (C) -40 -15
10
35
60
85
0
200
400
600
800
1000
TEMPERATURE (C)
TIME (hr)
MAX6165 PPM vs. TIME
MAX6161/68 toc04
MAX6161 LINE REGULATION
MAX6161/68 toc05
MAX6165 LINE REGULATION
MAX6161/68 toc06
80 70 60 50 PPM 40 30 20 10 0 0 200 400 600 800
300 OUTPUT VOLTAGE CHANGE (V) 200 100 0 -100 -200 -300 TA = -40C TA = +85C TA = +25C
200 OUTPUT VOLTAGE CHANGE (V) 0 -200 -400 -600 -800 TA = +85C TA = -40C
TA = +25C
-1000 -1200 2 4 6 8 10 12 5 7 9 INPUT VOLTAGE (V) 11 13 INPUT VOLTAGE (V)
1000
TIME (hr)
MAX6161 LOAD REGULATION
MAX6161/68 toc07
MAX6165 LOAD REGULATION
MAX6161/68 toc08
MAX6166 DROPOUT VOLTAGE vs. LOAD CURRENT
TA = +85C
MAX6161/68 toc09
5 OUTPUT VOLTAGE CHANGE (mV) 4 3 2 1 0 -1 -2 -3 -4 -2 0 LOAD CURRENT (mA) 2 4 TA = -40C TA = +25C TA = +85C
12 10 OUTPUT VOLTAGE CHANGE (mV) 8 6 4 2 0 -2 -4 -6 -6 -4 -2 0 2 4 6 LOAD CURRENT (mA) TA = +25C TA = +85C
0.30 0.25 DROPOUT VOLTAGE (V) 0.20 TA = +25C 0.15 0.10 TA = -40C 0.05
TA = -40C 0 0 1 2 3 4 5 LOAD CURRENT (mA)
10
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Precision, Micropower, Low-Dropout, HighOutput-Current, SO-8 Voltage References
Typical Operating Characteristics (continued)
(VIN = +5V for MAX6161-MAX6168, VIN = +5.5V for MAX6165, IOUT = 0, TA = +25C, unless otherwise noted.) (Note 4)
MAX6165 DROPOUT VOLTAGE vs. LOAD CURRENT
MAX6161/68 toc10
MAX6161-MAX6168
MAX6161 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY
MAX6161/68 toc11
MAX6165 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY
-10 -20 PSRR (dB) -30 -40 -50 -60 -70 -80
MAX6161/68 toc12
0.25 TA = +85C
0 -10 -20 -30 PSRR (dB)
0
0.20 DROPOUT VOLTAGE (V)
0.15
TA = +25C TA = -40C
-40 -50 -60
0.10
0.05
-70 -80
0 0 1 2 3 4 5 LOAD CURRENT (mA)
-90 0.001 0.01 0.1 1 10 100 1000 FREQUENCY (kHz)
0.001
0.1
10
1000
FREQUENCY (kHz)
MAX6161 SUPPLY CURRENT vs. INPUT VOLTAGE
MAX6161/68 toc13
MAX6165 SUPPLY CURRENT vs. INPUT VOLTAGE
MAX6161/68 toc14
MAX6161 SUPPLY CURRENT vs. TEMPERATURE
VIN = 12.5V 110 SUPPLY CURRENT (A) VIN = 7.5V
MAX6161/68 toc15
110
115 110 SUPPLY CURRENT (A) 105 100 95 90 85
120
SUPPLY CURRENT (A)
100
100
90
90 VIN = 2.5V VIN = 5.5V
80
80
70 2 4 6 8 10 12 INPUT VOLTAGE (V)
80 5 7 9 INPUT VOLTAGE (V) 11 13
70 -40 -15 10 35 60 85 TEMPERATURE (C)
MAX6165 SUPPLY CURRENT vs. TEMPERATURE
MAX6161/68 toc16
MAX6161 OUTPUT IMPEDANCE vs. FREQUENCY
MAX6161/68 toc17
MAX6165 OUTPUT IMPEDANCE vs. FREQUENCY
160 OUTPUT IMPEDANCE () 140 120 100 80 60 40 20 0
MAX6161/68 toc18
115
220 200 180 OUTPUT IMPEDANCE () 160 140 120 100 80 60 40 20
180
SUPPLY CURRENT (A)
105
VIN = 12.5V VIN = 7.5V
95 VIN = 5.5V
85 -40 -15 10 35 60 85 TEMPERATURE (C)
0 0.001 0.1 10 1000 FREQUENCY (kHz)
0.001
0.1
10
1000
FREQUENCY (kHz)
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Precision, Micropower, Low-Dropout, HighOutput-Current, SO-8 Voltage References MAX6161-MAX6168
Typical Operating Characteristics (continued)
(VIN = +5V for MAX6161-MAX6168, VIN = +5.5V for MAX6165, IOUT = 0, TA = +25C, unless otherwise noted.) (Note 4)
MAX6161 0.1Hz TO 10Hz OUTPUT NOISE
MAX6161/68 toc19
MAX6165 NOISE
MAX6161/68 toc20
VOUT 10V/div
VOUT 10V/div
1s/div
1s/div
MAX6161 TURN-ON TRANSIENT (CL = 50pF)
MAX6161/68 toc21
MAX6165 TURN-ON TRANSIENT (CL = 50pF)
MAX6161/67 toc22
VOUT 500mV/div
VOUT 2V/div
VIN 5V/div
VIN 5V/div 10s/div 40s/div
MAX6161 LOAD TRANSIENT (IOUT = 250A, VIN = 5.0, CL = 0)
MAX6161/68 toc23
MAX6165 LOAD TRANSIENT (IOUT = 250A, CL = 0, VIN = 5.5V)
MAX6161/68 toc24
IOUT 500A/div
+250A -250A IOUT 500A/div
+250A -250A
VOUT AC-COUPLED 100mV/div
VOUT AC-COUPLED 50mV/div
400s/div
400s/div
12
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Precision, Micropower, Low-Dropout, HighOutput-Current, SO-8 Voltage References
Typical Operating Characteristics (continued)
(VIN = +5V for MAX6161-MAX6168, VIN = +5.5V for MAX6165, IOUT = 0, TA = +25C, unless otherwise noted.) (Note 4)
MAX6161 LOAD TRANSIENT (IOUT = 250A, VIN = 5.0V, CL = 1F)
MAX6161/68 toc25
MAX6161-MAX6168
MAX6165 LOAD TRANSIENT (IOUT = 250A, CL = 1F, VIN = 5.5V)
MAX6161/68 toc26
+250A IOUT 500A/div -250A IOUT 500A/div
+250A -250A
VOUT AC-COUPLED 10mV/div
VOUT AC-COUPLED 20mV/div
400s/div
400s/div
MAX6161 LOAD TRANSIENT (VIN = 5.0V, CL = 0, IOUT = 2mA)
MAX6161/68 toc27
MAX6165 LOAD TRANSIENT (CL = 0, IOUT = 2mA, VIN = 5.5V)
MAX6161/68 toc28
+2mA IOUT 5mA/div -2mA IOUT 5mA/div
+2mA -2mA
VOUT AC-COUPLED 100mV/div
VOUT AC-COUPLED 50mV/div
400s/div
400s/div
MAX6161 LOAD TRANSIENT (VIN = 5.0V, CL = 1F, IOUT = 2mA)
MAX6165 LOAD TRANSIENT (CL = 1F, IOUT = 2mA, VIN = 5.5V)
MAX6161/68 toc29
MAX6161/68 toc30
+2mA IOUT 5mA/div -2mA
+2mA IOUT 5mA/div -2mA
VOUT AC-COUPLED 50mV/div
VOUT AC-COUPLED 20mV/div
400s/div
400s/div
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13
Precision, Micropower, Low-Dropout, HighOutput-Current, SO-8 Voltage References MAX6161-MAX6168
Typical Operating Characteristics (continued)
(VIN = +5V for MAX6161-MAX6168, VIN = +5.5V for MAX6165, IOUT = 0, TA = +25C, unless otherwise noted.) (Note 4)
MAX6161 LOAD TRANSIENT (VIN = 5.0V, CL = 0, IOUT = 4mA) MAX6165 LOAD TRANSIENT (IOUT = 5mA, CL = 0, VIN = 5.5V)
MAX6161/68 toc31
MAX6161/68 toc32
+4mA IOUT 5mA/div -4mA IOUT 5mA/div
+5mA
-5mA
VOUT AC-COUPLED 200mV/div
VOUT AC-COUPLED 100mV/div
400s/div
400s/div
MAX6161 LOAD TRANSIENT (VIN = 5.0V, CL = 1F, IOUT = 4mA)
MAX6165 LOAD TRANSIENT (IOUT = 5mA, CL = 1F, VIN = 5.5V)
+4mA
MAX6161/68 toc33
MAX6161/68 toc34
+5mA IOUT 5mA/div
IOUT 5mA/div -4mA
-5mA
VOUT AC-COUPLED 50mV/div
VOUT AC-COUPLED 50mV/div
400s/div
400s/div
MAX6161 LINE TRANSIENT (CL = 0)
MAX6165 LINE TRANSIENT (CL = 0)
MAX6161/68 toc35
MAX6161/68 toc36
+0.25V VIN 500mV/div -0.25V VIN 500mV/div
+0.25V -0.25V
VOUT AC-COUPLED 20mV/div
VOUT AC-COUPLED 20mV/div
40s/div
40s/div
Note 4: 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. 14 ___________________________________________________________________________________________________
Precision, Micropower, Low-Dropout, HighOutput-Current, SO-8 Voltage References
Pin Description
PIN 1, 3, 5, 7, 8 2 4 6 NAME N.C. IN GND OUT No Connection. Not internally connected. Input Voltage Ground Reference Output FUNCTION
MAX6161-MAX6168
Applications Information
Input Bypassing
For the best line-transient performance, decouple the input with a 0.1F ceramic capacitor as shown in the Typical Operating Circuit. Locate the capacitor as close to IN as possible. When transient performance is less important, no capacitor is necessary.
Output Voltage Hysteresis
Output voltage hysteresis is the change in the input voltage at TA = +25C before and after the device is cycled over its entire operating temperature range. Hysteresis is caused by differential package stress appearing across the bandgap core transistors. The typical temperature hysteresis value is 80ppm.
Turn-On Time
These devices typically turn on and settle to within 0.1% of their final value in 50s to 300s, depending on the output voltage (see electrical table of part used). The turn-on time can increase up to 1.5ms with the device operating at the minimum dropout voltage and the maximum load.
Output/Load Capacitance
Devices in the MAX6161 family do not require an output capacitor for frequency stability. In applications where the load or the supply can experience step changes, an output capacitor of at least 0.1F will reduce the amount of overshoot (undershoot) and improve the circuit's transient response. Many applications do not require an external capacitor, and the MAX6161 family can offer a significant advantage in applications when board space is critical.
Typical Operating Circuit
+SUPPLY INPUT (SEE SELECTOR GUIDE)
Supply Current
The quiescent supply current of the series-mode MAX6161 family is typically 90A and is virtually independent of the supply voltage, with only an 8A/V (max) variation with supply voltage. Unlike series references, shunt-mode references operate with a series resistor connected to the power supply. The quiescent current of a shunt-mode reference is thus a function of the input voltage. Additionally, shunt-mode references have to be biased at the maximum expected load current, even if the load 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 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 to 400A beyond the nominal supply current. The input voltage source must be capable of providing this current to ensure reliable turn-on.
IN OUT REFERENCE OUT
0.1F*
MAX6161- MAX6168
GND
1F*
*CAPACITORS ARE OPTIONAL.
__________________________Chip TRANSISTOR COUNT: 117 PROCESS: BiCMOS
Information
______________________________________________________________________________________
15
Precision, Micropower, Low-Dropout, HighOutput-Current, SO-8 Voltage References MAX6161-MAX6168
Selector Guide
PART MAX6161A MAX6161B MAX6168A MAX6168B MAX6162A MAX6162B MAX6166A MAX6166B MAX6163A MAX6163B MAX6164A MAX6164B MAX6167A MAX6167B MAX6165A MAX6165B OUTPUT VOLTAGE (V) 1.250 1.250 1.800 1.800 2.048 2.048 2.500 2.500 3.000 3.000 4.096 4.096 4.500 4.500 5.000 5.000 INITIAL ACCURACY (mV) 2 4 2 5 2 5 2 5 2 5 2 5 2 5 2 5 TEMPERATURE COEFFICIENT (ppm/C) 10 15 5 10 5 10 5 10 5 10 5 10 5 10 5 10
16
______________________________________________________________________________________
Precision, Micropower, Low-Dropout, HighOutput-Current, SO-8 Voltage References
Package Information
SOICN.EPS
MAX6161-MAX6168
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________17 (c) 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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