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19-3168; Rev 1; 4/04
High-Precision Voltage Reference with Temperature Sensor MAX6143
General Description
The MAX6143 is a low-noise, high-precision voltage reference. The device features a proprietary temperaturecoefficient curvature-correction circuit and laser-trimmed thin-film resistors that result in a very low 3ppm/C temperature coefficient and excellent 0.06% initial accuracy. The MAX6143 provides a TEMP output where the output voltage is proportional to die temperature, making the device suitable for a wide variety of temperature-sensing applications. The device also provides a TRIM input, allowing fine trimming of the output voltage with a resistive-divider network. Low temperature drift and low noise make the MAX6143 ideal for use with high-resolution A/D or D/A converters. The MAX6143 provides accurate preset +2.5V, +3.3V, +4.096V, +5.0V, and +10V reference voltages and accepts input voltages up to +40V. The device draws 340A of supply current and sources 30mA or sinks 2mA of load current. The active-low shutdown feature (SHDN) reduces supply current to 0.01A. The MAX6143 uses bandgap technology for low-noise performance and excellent accuracy. The MAX6143 does not require an output bypass capacitor for stability, and is stable with capacitive loads up to 100F. Eliminating the output bypass capacitor saves valuable board area in spacecritical applications. The MAX6143 is available in an 8-pin SO package and operates over the automotive (-40C to +125C) temperature range.
Features
Wide (VOUT + 2V) to +40V Supply Voltage Range Excellent Temperature Stability: 3ppm/C (max) Tight Initial Accuracy: 0.05% (max) Low Noise: 3.8VP-P (typ at 2.5V Output) Sources up to 30mA Output Current Low Supply Current: 450A (max at +25C) Low 0.01A Shutdown Current Linear Temperature Transducer Voltage Output +2.5V, +3.3V, +4.096V, +5.0V, or +10V Output Voltages Wide Operating Temperature Range: -40C to +125C No External Capacitors Required for Stability
Typical Operating Circuit
( VOUT + 2V) TO 40V INPUT
IN SHDN OUT MAX6143 TEMP GND *OPTIONAL. TRIM REFERENCE OUTPUT
*
*
*
Applications
A/D Converters D/A Converters Digital Voltmeters
PINPACKAGE 8 SO 8 SO 8 SO 8 SO 8 SO 8 SO 8 SO 8 SO 8 SO 8 SO
Voltage Regulators Threshold Detectors
Pin Configuration appears at end of data sheet.
Ordering Information/Selector Guide
OUTPUT VOLTAGE (V) 2.500 2.500 3.300 3.300 4.096 4.096 5.000 5.000 10.000 10.000 TEMPERATURE COEFFICIENT (ppm/C) 40C TO +125C 3 10 3 10 3 10 3 10 3 10 INITIAL ACCURACY (%) 0.06 0.10 0.06 0.10 0.06 0.10 0.06 0.10 0.05 0.10
PART MAX6143AASA25 MAX6143BASA25 MAX6143AASA33 MAX6143BASA33 MAX6143AASA41 MAX6143BASA41 MAX6143AASA50 MAX6143BASA50 MAX6143AASA10 MAX6143BASA10
TEMP RANGE -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C
________________________________________________________________ Maxim Integrated Products
1
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High-Precision Voltage Reference with Temperature Sensor MAX6143
ABSOLUTE MAXIMUM RATINGS
IN to GND ...............................................................-0.3V to +42V OUT, SHDN, TRIM, TEMP to GND...............-0.3V to (VIN + 0.3V) Output Short Circuit to GND .....................................................5s Continuous Power Dissipation (TA = +70C) 8-Pin SO (derate 5.9mW/C above +70C) ..................471mW Operating Temperature Range ........................-40C to +125C Junction Temperature .....................................................+150C 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--MAX6143_25 (VOUT = 2.5V)
(VIN = V SHDN = +5V, TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT Output Voltage Output Adjustment Range Output-Voltage Temperature Coefficient (Note 2) Line Regulation (Note 3) VOUT VTRIM TCVOUT No load, TA = +25C RPOT = 10k MAX6143AASA TA = -40C to +125C MAX6143BASA VOUT / VIN 4.5V VIN 40V Sourcing: 0 IOUT 10mA Sinking: -0.6mA IOUT 0 OUT shorted to GND OUT shorted to IN TA = +25C TA = -40C to +125C TA = +25C TA = -40C to +125C TA = +25C TA = -40C to +125C 3 0.6 0.8 2 2 50 90 60 3 120 1000 hours at TA = +25C 50 10 5 10 10 15 500 900 mA ppm ppm ppm/mA ppm/V MAX6143A_25 (0.06%) MAX6143B_25 (0.1%) 2.4985 2.4975 3 2.5 2.5 6 1.5 3 ppm/C 2.5015 2.5025 V % SYMBOL CONDITIONS MIN TYP MAX UNITS
Load Regulation (Note 3)
VOUT / IOUT
Output Short-Circuit Current Temperature Hysteresis (Note 4) Long-Term Stability DYNAMIC Noise Voltage Turn-On Settling Time INPUT Supply Voltage Range Quiescent Supply Current Shutdown Supply Current
ISC VOUT/ cycle VOUT/ time
eOUT tR VIN IIN ISHDN
f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value, COUT = 50pF Guaranteed by line regulation test No load, normal operation No load, VSHDN < 0.8V TA = +25C TA = -40C to +125C TA = -40C to +125C 4.5
3.8 6.8 150 40.0 300 450 600 0.01 5
VP-P VRMS s V A A
2
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High-Precision Voltage Reference with Temperature Sensor
ELECTRICAL CHARACTERISTICS--MAX6143_25 (VOUT = 2.5V) (continued)
(VIN = V SHDN = +5V, TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER SHUTDOWN (SHDN) Logic-High Input Voltage Logic-Low Input Voltage Logic-High Input Current Logic-Low Input Current TEMP OUTPUT TEMP Output Voltage TEMP Temperature Coefficient VTEMP TCTEMP 570 1.9 mV mV/C VIH VIL IIH IIL 2.0 0.8 20 2 V V A A SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX6143
ELECTRICAL CHARACTERISTICS--MAX6143_33 (VOUT = 3.3V)
(VIN = V SHDN = +10V, TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT Output Voltage Output Adjustment Range Output-Voltage Temperature Coefficient (Note 2) Line Regulation (Note 3) VOUT VTRIM TCVOUT No load, TA = +25C RPOT = 10k MAX6143AASA TA = -40C to +125C MAX6143BASA VOUT / VIN VOUT / IOUT 5.3V VIN 40V Sourcing: 0 IOUT 10mA Sinking: -0.6mA IOUT 0 OUT shorted to GND OUT shorted to IN TA = +25C TA = -40C to +125C TA = +25C TA = -40C to +125C TA = +25C TA = -40C to +125C 3 0.6 0.8 2 2 50 90 60 3 120 1000 hours at TA = +25C 50 10 5 10 10 15 500 900 mA ppm ppm ppm/ mA ppm/V MAX6143A_33 (0.06%) MAX6143B_33 (0.1%) 3.2980 3.2967 3 3.3 3.3 6 1.5 3 ppm/C 3.3020 3.3033 V % SYMBOL CONDITIONS MIN TYP MAX UNITS
Load Regulation (Note 3)
Output Short-Circuit Current Temperature Hysteresis (Note 4) Long-Term Stability DYNAMIC Noise Voltage Turn-On Settling Time
ISC VOUT/ cycle VOUT/ time
eOUT tR
f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value, COUT = 50pF
5 9.3 180
VP-P VRMS s
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High-Precision Voltage Reference with Temperature Sensor MAX6143
ELECTRICAL CHARACTERISTICS--MAX6143_33 (VOUT = 3.3V) (continued)
(VIN = V SHDN = +10V, TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER INPUT Supply Voltage Range Quiescent Supply Current Shutdown Supply Current SHUTDOWN (SHDN) Logic-High Input Voltage Logic-Low Input Voltage Logic-High Input Current Logic-Low Input Current TEMP OUTPUT TEMP Output Voltage TEMP Temperature Coefficient VTEMP TCTEMP 630 2.1 mV mV/C VIH VIL IIH IIL 2.0 0.8 20 2 V V A A VIN IIN ISHDN Guaranteed by line regulation test No load, normal operation No load, VSHDN < 0.8V TA = +25C TA = -40C to +125C TA = -40C to +125C 0.01 5.3 320 40.0 500 650 5 V A A SYMBOL CONDITIONS MIN TYP MAX UNITS
ELECTRICAL CHARACTERISTICS--MAX6143_41 (VOUT = 4.096V)
(VIN = V SHDN = +10V, TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT Output Voltage Output Adjustment Range Output-Voltage Temperature Coefficient (Note 2) Line Regulation (Note 3) VOUT VTRIM TCVOUT VOUT/ VIN VOUT/ IOUT No load, TA = +25C RPOT = 10k TA = -40C to +125C 6.1V VIN 40V Sourcing: 0 IOUT 10mA Sinking: -0.6mA IOUT 0 OUT shorted to GND OUT shorted to IN MAX6143AASA MAX6143BASA TA = +25C TA = -40C to +125C TA = +25C TA = -40C to +125C TA = +25C TA = -40C to +125C MAX6143A_41 (0.06%) MAX6143B_41 (0.1%) 4.0935 4.0919 3 4.096 4.096 6 1.5 3 0.6 0.8 2 2 50 90 60 3 120 1000 hours at TA = +25C 50 3 10 5 10 10 15 500 900 mA ppm ppm ppm/mA 4.0985 4.1001 V % ppm/C ppm/V SYMBOL CONDITIONS MIN TYP MAX UNITS
Load Regulation (Note 3)
Output Short-Circuit Current Temperature Hysteresis (Note 4) Long-Term Stability
ISC VOUT/ cycle VOUT/ time
4
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High-Precision Voltage Reference with Temperature Sensor
ELECTRICAL CHARACTERISTICS--MAX6143_41 (VOUT = 4.096V) (continued)
(VIN = V SHDN = +10V, TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER DYNAMIC Noise Voltage Turn-On Settling Time INPUT Supply Voltage Range Quiescent Supply Current Shutdown Supply Current SHUTDOWN (SHDN) Logic-High Input Voltage Logic-Low Input Voltage Logic-High Input Current Logic-Low Input Current TEMP OUTPUT TEMP Output Voltage TEMP Temperature Coefficient VTEMP TCTEMP (0.06%) 630 2.1 mV mV/C VIH VIL IIH IIL 2.0 0.8 20 2 V V A A VIN IIN ISHDN Guaranteed by line regulation test No load, normal operation No load, VSHDN < 0.8V TA = +25C TA = -40C to +125C TA =-40C to +125C 0.01 6.1 320 40.0 500 650 5 V A A eOUT tR f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value, COUT = 50pF 7 11.5 200 VP-P VRMS s SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX6143
ELECTRICAL CHARACTERISTICS--MAX6143_50 (VOUT = 5.0V)
(VIN = V SHDN = +15V, TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT Output Voltage Output Adjustment Range Output-Voltage Temperature Coefficient (Note 2) Line Regulation (Note 3) VOUT VTRIM TCVOUT No load, TA = +25C RPOT = 10k MAX6143AASA TA = -40C to +125C MAX6143BASA VOUT / VIN VOUT / IOUT 7V VIN 40V Sourcing: 0 IOUT 10mA Sinking: -0.6mA IOUT 0 TA = +25C TA = -40C to +125C TA = +25C TA = -40C to +125C TA = +25C TA = -40C to +125C 3 0.6 0.8 2 2 50 90 10 5 10 10 15 500 900 ppm/mA ppm/V MAX6143A_50 (0.06%) MAX6143B_50 (0.1%) 4.9970 4.9950 3 5.0 5.0 6 1.5 3 ppm/C 5.0030 5.0050 V % SYMBOL CONDITIONS MIN TYP MAX UNITS
Load Regulation (Note 3)
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High-Precision Voltage Reference with Temperature Sensor MAX6143
ELECTRICAL CHARACTERISTICS--MAX6143_50 (VOUT = 5.0V) (continued)
(VIN = V SHDN = +15V, TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER Output Short-Circuit Current Temperature Hysteresis (Note 4) Long-Term Stability DYNAMIC Noise Voltage Turn-On Settling Time INPUT Supply Voltage Range Quiescent Supply Current Shutdown Supply Current SHUTDOWN (SHDN) Logic-High Input Voltage Logic-Low Input Voltage Logic-High Input Current Logic-Low Input Current TEMP OUTPUT TEMP Output Voltage TEMP Temperature Coefficient VTEMP TCTEMP 630 2.1 mV mV/C VIH VIL IIH IIL 2.0 0.8 20 2 V V A A VIN IIN ISHDN Guaranteed by line regulation test No load, normal operation No load, VSHDN < 0.8V TA = +25C TA = -40C to +125C TA = -40C to +125C 0.01 7 320 40 550 700 5 V A A eOUT tR f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value, COUT = 50pF 9 14.5 230 VP-P VRMS s SYMBOL ISC VOUT/ cycle VOUT/ time 1000 hours at TA = +25C CONDITIONS OUT shorted to GND OUT shorted to IN MIN TYP 60 3 120 50 MAX UNITS mA ppm ppm
ELECTRICAL CHARACTERISTICS--MAX6143_10 (VOUT = 10V)
(VIN = V SHDN = +15V, TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT Output Voltage Output Adjustment Range Output-Voltage Temperature Coefficient (Note 2) Line Regulation (Note 3) VOUT VTRIM TCVOUT No load, TA = +25C RPOT = 10k MAX6143AASA TA = -40C to +125C MAX6143BASA VOUT/ VIN 12V VIN 40V TA = +25C TA = -40C to +125C 3 0.6 0.8 10 5 10 ppm/V MAX6143A_10 (0.05%) MAX6143B_10 (0.1%) 9.995 9.990 3 10.0 10.0 6 1.5 3 ppm/C 10.005 10.010 V % SYMBOL CONDITIONS MIN TYP MAX UNITS
6
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High-Precision Voltage Reference with Temperature Sensor
ELECTRICAL CHARACTERISTICS--MAX6143_10 (VOUT = 10V) (continued)
(VIN = V SHDN = +15V, TA = -40C to +125C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER SYMBOL VOUT/ IOUT Sourcing: 0 IOUT 10mA Sinking: -0.6mA IOUT 0 OUT shorted to GND OUT shorted to IN CONDITIONS TA = +25C TA = -40C to +125C TA = +25C TA = -40C to +125C MIN TYP 2 2 50 90 60 3 120 1000 hours at TA = +25C 50 MAX 10 15 500 900 mA ppm ppm ppm/mA UNITS
MAX6143
Load Regulation (Note 3)
Output Short-Circuit Current Temperature Hysteresis (Note 4) Long-Term Stability DYNAMIC Noise Voltage Turn-On Settling Time INPUT Supply Voltage Range Quiescent Supply Current Shutdown Supply Current SHUTDOWN (SHDN) Logic-High Input Voltage Logic-Low Input Voltage Logic-High Input Current Logic-Low Input Current TEMP OUTPUT TEMP Output Voltage TEMP Temperature Coefficient
ISC VOUT/ cycle VOUT/ time
eOUT tR VIN IIN ISHDN
f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value, COUT = 50pF Guaranteed by line regulation test No load, normal operation No load, VSHDN < 0.8V TA = +25C TA = -40C to +125C TA = -40C to +125C 12
18 29 400 40 340 550 700 0.01 5
VP-P VRMS s V A A
VIH VIL IIH IIL VTEMP TCTEMP
2.0 0.8 20 2 630 2.1
V V A A mV mV/C
Note 1: Note 2: Note 3: Note 4:
All devices are 100% production tested at TA = +25C and guaranteed by design over TA = TMIN to TMAX, as specified. Temperature coefficient is defined as VOUT divided by the temperature range. Line and load regulation specifications do not include the effects of self-heating. Thermal hysteresis is defined as the change in +25C output voltage before and after cycling the device from TMAX to TMIN.
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High-Precision Voltage Reference with Temperature Sensor MAX6143
Typical Operating Characteristics
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25C, unless otherwise noted.)
OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 2.5V)
MAX6143toc01
OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 10V)
MAX6143toc02
LOAD REGULATION vs. SOURCE CURRENT (VOUT = 2.5V)
MAX6143toc03
2.502
10.003 10.002 10.001 OUTPUT VOLTAGE (V) 10.000 9.999 9.998 9.997 9.996 9.995
0.50 OUTPUT VOLTAGE CHANGE (mV)
2.501 OUTPUT VOLTAGE (V)
0.25 TA = +25C 0
TA = -40C
2.500
2.499 THREE TYPICAL PARTS 2.498 -50 -25 0 25 50 75 100 125 TEMPERATURE (C)
-0.25 TA = +125C -0.50 0 5 10 15 20 25 30 SOURCE CURRENT (mA)
9.994 9.993 -50
THREE TYPICAL PARTS -25 0 25 50 75 100 125
TEMPERATURE (C)
LOAD REGULATION vs. SOURCE CURRENT (VOUT = 10V)
MAX6143toc04
LOAD REGULATION vs. SINK CURRENT (VOUT = 2.5V)
MAX6143toc05
LOAD REGULATION vs. SINK CURRENT (VOUT = 10V)
MAX6143toc06
0.50 OUTPUT VOLTAGE CHANGE (mV) TA = +25C 0.25 TA = +125C 0
1.00 OUTPUT VOLTAGE CHANGE (mV) 0.75 0.50 TA = +125C 0.25 0 TA = -40C -0.25 -0.50 TA = +25C
2.0 OUTPUT VOLTAGE CHANGE (mV) 1.5 TA = -40C 1.0 0.5 0 -0.5 -1.0 TA = +25C TA = +125C
-0.25 TA = -40C -0.50 0 5 10 15 20 25 30 SOURCE CURRENT (mA)
0
0.5
1.0 SINK CURRENT (mA)
1.5
2.0
0
0.5
1.0 SINK CURRENT (mA)
1.5
2.0
LINE REGULATION vs. TEMPERATURE (VOUT = 2.5V)
MAX6143toc07
LINE REGULATION vs. TEMPERATURE (VOUT = 10V)
MAX6143toc08
MINIMUM INPUT-OUTPUT DIFFERENTIAL vs. SOURCE CURRENT (VOUT = 2.5V)
MAX6143toc09
100
300 250 TA = +125C 200 150 100 50 0 TA = -40C
2.5
OUTPUT VOLTAGE CHANGE (V)
80 TA = -40C 60 TA = +125C 40
OUTPUT VOLTAGE CHANGE (V)
DROPOUT VOLTAGE (V)
2.0 TA = +125C 1.5 TA = +25C 1.0 TA = -40C
20 TA = +25C 0 0 5 10 15 20 25 30 35 40 INPUT VOLTAGE (V)
TA = +25C 0.5 12 16 20 24 28 32 36 40 0 4 8 12 16 20 INPUT VOLTAGE (V) SOURCE CURRENT (mA)
8
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High-Precision Voltage Reference with Temperature Sensor MAX6143
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25C, unless otherwise noted.)
MINIMUM INPUT-OUTPUT DIFFERENTIAL vs. SOURCE CURRENT (VOUT = 10V)
MAX6143toc10
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 2.5V)
MAX6143toc11
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 10V)
-20 -40 PSRR (dB) -60 -80
MAX6143toc12
2.5
0 -20 -40 PSRR (dB) -60 -80 -100 -120
0
DROPOUT VOLTAGE (V)
2.0 TA = +125C
1.5
TA = +25C
1.0
TA = -40C
-100 -120 0.001
0.5 0 4 8 12 16 20 SOURCE CURRENT (mA)
-140 0.001
0.01
0.1
1
10
100
1000
0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
FREQUENCY (kHz)
OUTPUT IMPEDANCE vs. FREQUENCY (VOUT = 2.5V)
MAX6143toc13
SUPPLY CURRENT vs. INPUT VOLTAGE (VOUT = 2.5V)
MAX6143toc14
SUPPLY CURRENT vs. INPUT VOLTAGE (VOUT = 10V)
350 SUPPLY CURRENT (A) 300 250 200 150 100 50 0 TA = -40C TA = +25C TA = +125C
MAX6143toc15
100
400 350 SUPPLY CURRENT (A) 300 250 200 150 100 50 TA = -40C TA = +25C TA = +125C
400
OUTPUT IMPEDANCE ()
10
1
0.1
0.01
0.001 0.01 0.1 1 10 100 1000 FREQUENCY (kHz)
0 0 5 10 15 20 25 30 35 40 INPUT VOLTAGE (V)
0
5
10
15
20
25
30
35
40
INPUT VOLTAGE (V)
SUPPLY CURRENT vs. TEMPERATURE (VOUT = 2.5V)
MAX6143toc16
SUPPLY CURRENT vs. TEMPERATURE (VOUT = 10V)
MAX6143toc17
SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE (VOUT = 2.5V)
MAX6143toc18
350
375
100
SUPPLY CURRENT (A)
SUPPLY CURRENT (A)
325
SHUTDOWN CURRENT (nA) -50 -25 0 25 50 75 100 125
350
10
325
300
1
300
275
275
0.1
250 -50 -25 0 25 50 75 100 125 TEMPERATURE (C)
250 TEMPERATURE (C)
0.01 -50 -25 0 25 50 75 100 125 TEMPERATURE (C)
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High-Precision Voltage Reference with Temperature Sensor MAX6143
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25C, unless otherwise noted.)
SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE (VOUT = 10V)
MAX6143toc19
TEMP VOLTAGE vs. TEMPERATURE (VOUT = 2.5V)
MAX6143toc20
TEMP VOLTAGE vs. TEMPERATURE (VOUT = 10V)
MAX6143toc21
100
800
900
SHUTDOWN CURRENT (nA)
10 TEMP VOLTAGE (mV)
700 TEMP VOLTAGE (mV) -50 -25 0 25 50 75 100 125
800
700
1
600
600
0.1
500
500
0.01 -50 -25 0 25 50 75 100 125 TEMPERATURE (C)
400 TEMPERATURE (C)
400 -50 -25 0 25 50 75 100 125 TEMPERATURE (C)
OUTPUT VOLTAGE vs. TRIM VOLTAGE (VOUT = 2.5V)
MAX6143toc22
MAX6143toc23
TWO TYPICAL PARTS 2.501
TWO TYPICAL PARTS 10.001 VOUT (V)
2.60 OUTPUT VOLTAGE (V) 2.55 2.50 2.45
VOUT (V)
2.500
10.000
2.499 2.40 2.35 0 0.5 1.0 1.5 2.0 2.5 TRIM VOLTAGE (V) 2.498 0 200 400 600 800 1000 TIME (hours)
9.999
9.998 0 200 400 600 800 1000 TIME (hours)
OUTPUT VOLTAGE-NOISE DENSITY vs. FREQUENCY (VOUT = 2.5V)
MAX6143toc25
OUTPUT VOLTAGE-NOISE DENSITY vs. FREQUENCY (VOUT = 10V)
OUTPUT VOLTAGE-NOISE DENSITY (nV/Hz)
MAX6143toc26
0.1Hz TO 10Hz OUTPUT NOISE
MAX6143toc27
OUTPUT VOLTAGE-NOISE DENSITY (nV/Hz)
1000
10,000
1000
MAX6143toc24
2.65
LONG-TERM STABILITY vs. TIME (VOUT = 2.500V)
2.502 10.002
LONG-TERM STABILITY vs. TIME (VOUT = 10.0V)
1V/div
100 0.1 1 10 100 FREQUENCY (Hz) 1000
100 0.1 1 10 100 FREQUENCY (Hz) 1000 1s/div
10
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High-Precision Voltage Reference with Temperature Sensor MAX6143
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25C, unless otherwise noted.)
0.1Hz TO 10Hz OUTPUT NOISE
MAX6143toc28
LOAD TRANSIENT (VOUT = 2.5V, COUT = 0, 0 TO 20mA)
MAX6413toc29
LOAD TRANSIENT (VOUT = 10V, COUT = 0, 0 TO 20mA)
MAX6413toc30
20mA IOUT
20mA IOUT 0
4V/div
0
VOUT AC-COUPLED 1V/div
VOUT AC-COUPLED 1V/div
1s/div
10s/div
10s/div
LOAD TRANSIENT (VOUT = 2.5V, COUT = 1F, 0 TO +20mA)
MAX6413toc31
LOAD TRANSIENT (VOUT = 10V, COUT = 1F, 0 TO 20mA)
MAX6413toc32
LOAD TRANSIENT (VOUT = 2.5V, COUT = 0, 0 TO -2mA)
MAX6413toc33
20mA 20mA IOUT 0 IOUT 0
0 IOUT -2mA
VOUT AC-COUPLED 50mV/div
VOUT AC-COUPLED 100mV/div
VOUT AC-COUPLED 200mV/div
200s/div
100s/div
40s/div
LOAD TRANSIENT (VOUT = 10V, COUT = 0, 0 TO -2mA)
MAX6413toc34
LOAD TRANSIENT (VOUT = 2.5V, COUT = 1F, 0 TO -2mA)
MAX6413toc35
LOAD TRANSIENT (VOUT = 10V, COUT = 1F, 0 TO -2mA)
MAX6413toc36
0 0 IOUT -2mA IOUT -2mA
0 IOUT -2mA
VOUT AC-COUPLED 20mV/div
VOUT AC-COUPLED 20mV/div
VOUT AC-COUPLED 5mV/div
200s/div
400s/div
400s/div
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11
High-Precision Voltage Reference with Temperature Sensor MAX6143
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25C, unless otherwise noted.)
LINE TRANSIENT (VOUT = 2.5V)
MAX6413toc37
LINE TRANSIENT (VOUT = 10V)
5.5V VIN 4.5V
MAX6413toc38
TURN-ON TRANSIENT (VOUT = 2.5V, COUT = 0)
MAX6413toc39
15.5V VIN 1V/div 14.5V
VIN 2V/div GND
VOUT AC-COUPLED 200mV/div COUT = 0 10s/div 2s/div
VOUT AC-COUPLED 200mV/div COUT = 0 10s/div
VOUT 1V/div GND
TURN-ON TRANSIENT (VOUT = 2.5V, COUT = 1F)
MAX6413toc40
TURN-ON TRANSIENT (VOUT = 10V, COUT = 0)
MAX6413toc41
TURN-ON TRANSIENT (VOUT = 10V, COUT = 1F)
MAX6413toc42
VIN 2V/div GND
VIN 5V/div GND
VIN 5V/div
GND
VOUT 1V/div GND 40s/div 100s/div
VOUT 5V/div GND 200s/div
VOUT 5V/div GND
SHUTDOWN TRANSIENT (VOUT = 2.5V, VIN = 5V, COUT = 0)
MAX6413toc43
SHUTDOWN TRANSIENT (VOUT = 2.5V, VIN = 5V, COUT = 1F)
MAX6413toc44
+5V VSHDN 2V/div VSHDN 2V/div GND GND VOUT 1V/div GND 40s/div
VOUT 1V/div GND 10s/div
12
______________________________________________________________________________________
High-Precision Voltage Reference with Temperature Sensor MAX6143
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25C, unless otherwise noted.)
SHUTDOWN TRANSIENT (VOUT = 10V, VIN = 15V, COUT = 0)
MAX6413toc45
SHUTDOWN TRANSIENT (VOUT = 10V, VIN = 15V, COUT = 1F)
MAX6143toc46
VSHDN 5V/div
VSHDN 5V/div
GND
GND
VOUT 5V/div GND 100s/div
VOUT 5V/div GND 100s/div
Pin Description
PIN 1, 8 2 3 4 5 6 7 NAME I.C. IN TEMP GND TRIM OUT SHDN FUNCTION Internally Connected. Do not connect externally. Positive Power-Supply Input Temperature Proportional Output Voltage. TEMP generates an output voltage proportional to the die temperature. Ground Output Voltage Trim. Connect TRIM to the center of a voltage-divider between OUT and GND for trimming. Leave unconnected to use the preset output voltage. Output Voltage Active-Low Shutdown. Connect SHDN to IN for normal operation.
Detailed Description
The MAX6143 precision voltage reference provides accurate preset +2.5V, +3.3V, +4.096V, +5.0V, and +10V reference voltages from up to +40V input voltages. These devices feature a proprietary temperature-coefficient curvature-correction circuit and laser-trimmed thinfilm resistors that result in a very low 3ppm/C temperature coefficient and excellent 0.05% initial accuracy. The MAX6143 draws 340A of supply current and sources 30mA or sinks 2mA of load current. where:
VOUT = 2 x (VTRIM - VTRIM (open)) x k VTRIM = 0 to VOUT VTRIM (open) = VOUT (nominal) / 2 (typ) k = 6% typ For example, use a 50k potentiometer (such as the MAX5436) between OUT, TRIM, and GND with the potentiometer wiper connected to TRIM (see Figure 2). As the TRIM voltage changes from VOUT to GND, the output voltage changes accordingly. Set R2 to 1M or less. Currents through resistors R1 and R2 add to the quiescent supply current.
Trimming the Output Voltage
Trim the factory-preset output voltage on the MAX6143 by placing a resistive-divider network between OUT, TRIM, and GND. Use the following formula to calculate the change in output voltage from its preset value:
______________________________________________________________________________________
13
High-Precision Voltage Reference with Temperature Sensor MAX6143
Temp Output
The MAX6143 provides a temperature output proportional to die temperature. TEMP can be calculated from the following formula: TEMP (V) = TJ (K) x n where TJ = the die temperature, n = the temperature multiplier, n= VTEMP (at TJ = T0 ) 1.9mV / K T0
Supply Current
The MAX6143 consumes 340A of quiescent supply current. This improved efficiency reduces power dissipation and extends battery life.
Shutdown
The active-low shutdown feature reduces supply current to 0.01A (typ), further extending battery life. Connect SHDN to GND to activate shutdown. Connect SHDN to IN for normal operation.
Thermal Hysteresis
Thermal hysteresis is the change in the output 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 thermal hysteresis value is 120ppm.
TA = the ambient temperature. Self-heating affects the die temperature and conversely, the TEMP output. The TEMP equation assumes the output is not loaded. If device power dissipation is negligible, then TJ TA.
Applications Information
Bypassing/Output Capacitance
For the best line-transient performance, decouple the input with a 0.1F ceramic capacitor as shown in the Typical Operating Circuit. Place the capacitor as close to IN as possible. When transient performance is less important, no capacitor is necessary. The MAX6143 does not require an output capacitor for stability and is stable with capacitive loads up to 100F. In applications where the load or the supply can experience step changes, a larger output capacitor reduces the amount of overshoot (undershoot) and improves the circuit's transient response. Place output capacitors as close to the device as possible for best performance.
Turn-On Time
The MAX6143 typically turns on and settles to within 0.1% of the preset output voltage in 150s (2.5V output). The turn-on time can increase up to 150s with the device operating at a 1F load.
Short-Circuited Outputs
The MAX6143 features a short-circuit-protected output. Internal circuitry limits the output current to 60mA when short circuiting the output to ground. The output current is limited to 3mA when short circuiting the output to the input.
10,000 1000 100 TEMPERATURE COEFFICIENT (ppm/C) 8-BIT 10 1 0.1 0.01 1 10 OPERATING TEMPERATURE RANGE (TMAX - TMIN) (C) 10-BIT 12-BIT 14-BIT 16-BIT 18-BIT 20-BIT 100
Figure 1. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error
14
______________________________________________________________________________________
High-Precision Voltage Reference with Temperature Sensor MAX6143
Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error
In a data converter application, the reference voltage of the converter must stay within a certain limit to keep the error in the data converter smaller than the resolution limit through the operating temperature range. Figure 1 shows the maximum allowable reference-voltage temperature coefficient to keep the conversion error to less than 1 LSB, as a function of the operating temperature range (TMAX - TMIN) with the converter resolution as a parameter. The graph assumes the reference-voltage temperature coefficient as the only parameter affecting accuracy. In reality, the absolute static accuracy of a data converter is dependent on the combination of many parameters such as integral nonlinearity, differential nonlinearity, offset error, gain error, as well as voltagereference changes.
( VOUT + 2V) TO 40V INPUT
IN REFERENCE OUTPUT
SHDN
OUT
*
TEMP
MAX6143 MAX5436 50k POTENTIOMETER
TRIM
GND
*OPTIONAL.
Figure 2. Applications Circuit Using the MAX5436 Potrntiometer
Pin Configuration
TRANSISTOR COUNT: 429 PROCESS: BiCMOS
TOP VIEW
I.C.* IN TEMP 1 2 8 7 I.C.* SHDN OUT TRIM
Chip Information
MAX6143
3 6 5 GND 4
SO
*INTERNALLY CONNECTED. DO NOT CONNECT.
______________________________________________________________________________________
15
High-Precision Voltage Reference with Temperature Sensor MAX6143
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)
SOICN .EPS
INCHES DIM A A1 B C e E H L MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050
MILLIMETERS MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 1.27
N
E
H
VARIATIONS:
1
INCHES
MILLIMETERS MIN 4.80 8.55 9.80 MAX 5.00 8.75 10.00 N MS012 8 AA 14 AB 16 AC
TOP VIEW
DIM D D D
MIN 0.189 0.337 0.386
MAX 0.197 0.344 0.394
D A e B A1 L C
0-8
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL DOCUMENT CONTROL NO. REV.
21-0041
B
1 1
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.
16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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