General Description
The MAX6143 is a low-noise, high-precision voltage ref-
erence. The device features a proprietary temperature-
coefficient 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 tempera-
ture, making the device suitable for a wide variety of
temperature-sensing applications. The device also pro-
vides a TRIM input, allowing fine trimming of the output
voltage with a resistive-divider network. Low tempera-
ture 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
340µA of supply current and sources 30mA or sinks 2mA
of load current. The active-low shutdown feature (SHDN)
reduces supply current to 0.01µA. 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 100µF. Eliminating the output
bypass capacitor saves valuable board area in space-
critical applications.
The MAX6143 is available in an 8-pin SO package and
operates over the automotive (-40°C to +125°C) tem-
perature range.
Applications
A/D Converters Voltage Regulators
D/A Converters Threshold Detectors
Digital Voltmeters
Features
♦Wide (VOUT + 2V) to +40V Supply Voltage Range
♦Excellent Temperature Stability: 3ppm/°C (max)
♦Tight Initial Accuracy: 0.05% (max)
♦Low Noise: 3.8µVP-P (typ at 2.5V Output)
♦Sources up to 30mA Output Current
♦Low Supply Current: 450µA (max at +25°C)
♦Low 0.01µA Shutdown Current
♦Linear Temperature Transducer Voltage Output
♦+2.5V, +3.3V, +4.096V, +5.0V, or +10V Output
Voltages
♦Wide Operating Temperature Range: -40°C to
+125°C
♦No External Capacitors Required for Stability
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
________________________________________________________________ Maxim Integrated Products 1
19-3168; Rev 1; 4/04
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Pin Configuration appears at end of data sheet.
Ordering Information/Selector Guide
PART TEMP RANGE PIN-
PACKAGE
OUTPUT
VOLTAGE (V)
TEMPERATURE COEFFICIENT
(ppm/°C) 40°C TO +125°C
INITIAL
ACCURACY (%)
MAX6143AASA25
-40°C to +125°C
8 SO 2.500 3 0.06
MAX6143BASA25
-40°C to +125°C
8 SO 2.500 10 0.10
MAX6143AASA33
-40°C to +125°C
8 SO 3.300 3 0.06
MAX6143BASA33
-40°C to +125°C
8 SO 3.300 10 0.10
MAX6143AASA41
-40°C to +125°C
8 SO 4.096 3 0.06
MAX6143BASA41
-40°C to +125°C
8 SO 4.096 10 0.10
MAX6143AASA50
-40°C to +125°C
8 SO 5.000 3 0.06
MAX6143BASA50
-40°C to +125°C
8 SO 5.000 10 0.10
MAX6143AASA10
-40°C to +125°C
8 SO 10.000 3 0.05
MAX6143BASA10
-40°C to +125°C
8 SO 10.000 10 0.10
IN
OUT
GND
*OPTIONAL.
* *
*
( VOUT + 2V) TO 40V INPUT
REFERENCE
OUTPUT
SHDN
TRIM
TEMP
MAX6143
Typical Operating Circuit
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
2_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
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 = +70°C)
8-Pin SO (derate 5.9mW/°C above +70°C) ..................471mW
Operating Temperature Range ........................-40°C to +125°C
Junction Temperature .....................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
ELECTRICAL CHARACTERISTICS—MAX6143_25 (VOUT = 2.5V)
(VIN = VSHDN = +5V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
OUTPUT
MAX6143A_25 (0.06%)
2.4985
2.5
2.5015
Output Voltage VOUT
No load, TA = +25°C
MAX6143B_25 (0.1%)
2.4975
2.5
2.5025
V
Output Adjustment Range
∆VTRIM RPOT = 10kΩ±3±6%
MAX6143AASA 1.5 3Output-Voltage
Temperature Coefficient
(Note 2)
TCVOUT
TA = -40°C to +125°C
MAX6143BASA 3 10
ppm/°C
TA = +25°C 0.6 5
Line Regulation (Note 3)
∆VOUT / ∆VIN
4.5V ≤ VIN ≤ 40V TA = -40°C to +125°C 0.8 10
ppm/V
TA = +25°C210
Sourcing:
0 ≤ IOUT ≤ 10mA TA = -40°C to +125°C215
TA = +25°C50
500
Load Regulation (Note 3)
∆VOUT /
∆IOUT Sinking:
-0.6mA ≤ IOUT ≤ 0 TA = -40°C to +125°C90
900
ppm/mA
OUT shorted to GND 60
Output Short-Circuit
Current ISC OUT shorted to IN 3 mA
Temperature Hysteresis
(Note 4)
∆VOUT/
cycle
120
ppm
Long-Term Stability ∆VOUT/
time 1000 hours at TA = +25°C50ppm
DYNAMIC
f = 0.1Hz to 10Hz 3.8
µVP-P
Noise Voltage eOUT f = 10Hz to 1kHz 6.8
µVRMS
Turn-On Settling Time tRTo VOUT = 0.1% of final value, COUT = 50pF
150
µs
INPUT
Supply Voltage Range VIN Guaranteed by line regulation test 4.5
40.0
V
TA = +25°C
300 450
Quiescent Supply Current
IINNo load, normal
operation TA = -40°C to +125°C
600
µA
Shutdown Supply Current
ISHDN No load, VSHDN <
0.8V TA = -40°C to +125°C
0.01
5µA
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS—MAX6143_33 (VOUT = 3.3V)
(VIN = VSHDN = +10V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
OUTPUT
MAX6143A_33 (0.06%)
3.2980
3.3
3.3020
Output Voltage VOUT
No load, TA = +25°C
MAX6143B_33 (0.1%)
3.2967
3.3
3.3033
V
Output Adjustment Range ∆VTRIM RPOT = 10kΩ±3±6%
MAX6143AASA 1.5 3
Output-Voltage
Temperature Coefficient
(Note 2)
TCVOUT TA = -40°C to +125°C
MAX6143BASA 3 10
ppm/°C
TA = +25°C 0.6 5
Line Regulation (Note 3) ∆VOUT /
∆VIN 5.3V ≤ VIN ≤ 40V TA = -40°C to +125°C 0.8 10
ppm/V
TA = +25°C210
Sourcing:
0 ≤ IOUT ≤ 10mA TA = -40°C to +125°C215
TA = +25°C50
500
Load Regulation (Note 3) ∆VOUT /
∆IOUT Sinking:
-0.6mA ≤ IOUT ≤ 0 TA = -40°C to +125°C90
900
ppm/
mA
OUT shorted to GND 60
Output Short-Circuit Current
ISC OUT shorted to IN 3 mA
Temperature Hysteresis
(Note 4)
∆VOUT/
cycle
120
ppm
Long-Term Stability ∆VOUT/
time 1000 hours at TA = +25°C50
ppm
DYNAMIC
f = 0.1Hz to 10Hz 5
µVP-P
Noise Voltage eOUT f = 10Hz to 1kHz 9.3
µVRMS
Turn-On Settling Time tRTo VOUT = 0.1% of final value, COUT = 50pF 180 µs
ELECTRICAL CHARACTERISTICS—MAX6143_25 (VOUT = 2.5V) (continued)
(VIN = VSHDN = +5V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SHUTDOWN (SHDN)
Logic-High Input Voltage
VIH 2.0 V
Logic-Low Input Voltage VIL 0.8 V
Logic-High Input Current
IIH 20 µA
Logic-Low Input Current IIL 2µA
TEMP OUTPUT
TEMP Output Voltage VTEMP
570
mV
TEMP Temperature
Coefficient TCTEMP 1.9
mV/°C
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
4_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS—MAX6143_41 (VOUT = 4.096V)
(VIN = VSHDN = +10V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
OUTPUT
MAX6143A_41 (0.06%)
4.0935 4.096 4.0985
Output Voltage VOUT
No load, TA = +25°C
MAX6143B_41 (0.1%)
4.0919 4.096 4.1001
V
Output Adjustment Range
∆VTRIM
RPOT = 10kΩ±3±6%
MAX6143AASA 1.5 3
Output-Voltage Temperature
Coefficient (Note 2)
TCVOUT TA = -40°C to +125°C
MAX6143BASA 3 10
ppm/°C
TA = +25°C 0.6 5
Line Regulation (Note 3) ∆VOUT/
∆VIN 6.1V ≤ VIN ≤ 40V TA = -40°C to +125°C 0.8 10
ppm/V
TA = +25°C210
Sourcing:
0 ≤ IOUT ≤ 10mA TA = -40°C to +125°C215
TA = +25°C50500
Load Regulation (Note 3) ∆VOUT/
∆IOUT Sinking:
-0.6mA ≤ IOUT ≤ 0 TA = -40°C to +125°C90900
ppm/mA
OUT shorted to GND 60
Output Short-Circuit Current
ISC OUT shorted to IN 3 mA
Temperature Hysteresis
(Note 4)
∆VOUT/
cycle
120
ppm
Long-Term Stability ∆VOUT/
time 1000 hours at TA = +25°C50ppm
ELECTRICAL CHARACTERISTICS—MAX6143_33 (VOUT = 3.3V) (continued)
(VIN = VSHDN = +10V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
INPUT
Supply Voltage Range VIN Guaranteed by line regulation test 5.3
40.0
V
TA = +25°C320
500
Quiescent Supply Current IIN No load, normal
operation TA = -40°C to +125°C
650
µA
Shutdown Supply Current ISHDN No load, VSHDN <
0.8V TA = -40°C to +125°C
0.01
5µA
SHUTDOWN (SHDN)
Logic-High Input Voltage VIH 2.0 V
Logic-Low Input Voltage VIL 0.8 V
Logic-High Input Current IIH 20 µA
Logic-Low Input Current IIL 2µA
TEMP OUTPUT
TEMP Output Voltage VTEMP 630 mV
TEMP Temperature
Coefficient
TCTEMP
2.1
mV/°C
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS—MAX6143_50 (VOUT = 5.0V)
(VIN = VSHDN = +15V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OUTPUT
MAX6143A_50 (0.06%)
4.9970
5.0
5.0030
Output Voltage VOUT
No load, TA = +25°C
MAX6143B_50 (0.1%)
4.9950
5.0
5.0050
V
Output Adjustment Range ∆VTRIM RPOT = 10kΩ±3±6%
MAX6143AASA 1.5 3Output-Voltage
Temperature Coefficient
(Note 2)
TCVOUT TA = -40°C to +125°C
MAX6143BASA 3 10
ppm/°C
TA = +25°C 0.6 5
Line Regulation (Note 3) ∆VOUT /
∆VIN 7V ≤ VIN ≤ 40V TA = -40°C to +125°C 0.8 10
ppm/V
TA = +25°C210
Sourcing:
0 ≤ IOUT ≤ 10mA TA = -40°C to +125°C215
TA = +25°C50
500
Load Regulation (Note 3) ∆VOUT /
∆IOUT Sinking:
-0.6mA ≤ IOUT ≤ 0 TA = -40°C to +125°C90
900
ppm/mA
ELECTRICAL CHARACTERISTICS—MAX6143_41 (VOUT = 4.096V) (continued)
(VIN = VSHDN = +10V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
DYNAMIC
f = 0.1Hz to 10Hz 7
µVP-P
Noise Voltage eOUT f = 10Hz to 1kHz
11.5
µVRMS
Turn-On Settling Time tRTo VOUT = 0.1% of final value, COUT = 50pF
200
µs
INPUT
Supply Voltage Range VIN Guaranteed by line regulation test 6.1
40.0
V
TA = +25°C
320
500
Quiescent Supply Current IIN No load, normal
operation TA = -40°C to +125°C650 µA
Shutdown Supply Current ISHDN No load, VSHDN <
0.8V TA =-40°C to +125°C
0.01
5µA
SHUTDOWN (SHDN)
Logic-High Input Voltage VIH 2.0 V
Logic-Low Input Voltage VIL 0.8 V
Logic-High Input Current IIH 20 µA
Logic-Low Input Current IIL 2µA
TEMP OUTPUT
TEMP Output Voltage VTEMP
630
mV
TEMP Temperature
Coefficient
TCTEMP
(0.06%) 2.1
mV/°C
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
6_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS—MAX6143_50 (VOUT = 5.0V) (continued)
(VIN = VSHDN = +15V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
OUT shorted to GND 60
Output Short-Circuit Current
ISC OUT shorted to IN 3 mA
Temperature Hysteresis
(Note 4)
∆VOUT/
cycle
120
ppm
Long-Term Stability ∆VOUT/
time 1000 hours at TA = +25°C50ppm
DYNAMIC
f = 0.1Hz to 10Hz 9
µVP-P
Noise Voltage eOUT f = 10Hz to 1kHz
14.5
µVRMS
Turn-On Settling Time tRTo VOUT = 0.1% of final value, COUT = 50pF
230
µs
INPUT
Supply Voltage Range VIN Guaranteed by line regulation test 7 40 V
TA = +25°C
320 550
Quiescent Supply Current IIN No load, normal
operation TA = -40°C to +125°C
700
µA
Shutdown Supply Current ISHDN No load, VSHDN <
0.8V TA = -40°C to +125°C
0.01
5µA
SHUTDOWN (SHDN)
Logic-High Input Voltage VIH 2.0 V
Logic-Low Input Voltage VIL 0.8 V
Logic-High Input Current IIH 20 µA
Logic-Low Input Current IIL 2µA
TEMP OUTPUT
TEMP Output Voltage VTEMP
630
mV
TEMP Temperature
Coefficient
TCTEMP
2.1
mV/°C
ELECTRICAL CHARACTERISTICS—MAX6143_10 (VOUT = 10V)
(VIN = VSHDN = +15V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OUTPUT
MAX6143A_10 (0.05%)
9.995 10.0 10.005
Output Voltage VOUT
No load, TA = +25°C
MAX6143B_10 (0.1%)
9.990 10.0 10.010
V
Output Adjustment Range
∆VTRIM RPOT = 10kΩ±3±6%
MAX6143AASA 1.5 3Output-Voltage
Temperature Coefficient
(Note 2)
TCVOUT
TA = -40°C to +125°C
MAX6143BASA 3 10
p p m /° C
TA = +25°C 0.6 5
Line Regulation (Note 3) ∆VOUT/
∆VIN 12V ≤ VIN ≤ 40V TA = -40°C to +125°C 0.8 10
ppm/V
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
_______________________________________________________________________________________ 7
ELECTRICAL CHARACTERISTICS—MAX6143_10 (VOUT = 10V) (continued)
(VIN = VSHDN = +15V, TA= -40°C to +125°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
TA = +25°C210
Sourcing:
0 ≤ IOUT ≤ 10mA TA = -40°C to +125°C215
TA = +25°C50500
Load Regulation (Note 3) ∆VOUT/
∆IOUT Sinking:
-0.6mA ≤ IOUT ≤ 0 TA = -40°C to +125°C90 900
p p m /m A
OUT shorted to GND 60
Output Short-Circuit
Current ISC OUT shorted to IN 3 mA
Temperature Hysteresis
(Note 4)
∆VOUT/
cycle
120
ppm
Long-Term Stability ∆VOUT/
time 1000 hours at TA = +25°C50
ppm
DYNAMIC
f = 0.1Hz to 10Hz 18
µVP-P
Noise Voltage eOUT f = 10Hz to 1kHz 29
µVRMS
Turn-On Settling Time tRTo VOUT = 0.1% of final value, COUT = 50pF
400
µs
INPUT
Supply Voltage Range VIN Guaranteed by line regulation test 12 40 V
TA = +25°C
340
550
Quiescent Supply Current
IIN No load, normal
operation TA = -40°C to +125°C700 µA
Shutdown Supply Current
ISHDN No load, VSHDN <
0.8V TA = -40°C to +125°C
0.01
5µA
SHUTDOWN (SHDN)
Logic-High Input Voltage VIH 2.0 V
Logic-Low Input Voltage VIL 0.8 V
Logic-High Input Current IIH 20 µA
Logic-Low Input Current IIL 2µA
TEMP OUTPUT
TEMP Output Voltage VTEMP
630
mV
TEMP Temperature
Coefficient TCTEMP 2.1
mV/°C
Note 1: All devices are 100% production tested at TA= +25°C and guaranteed by design over TA= TMIN to TMAX, as specified.
Note 2: Temperature coefficient is defined as ∆VOUT divided by the temperature range.
Note 3: Line and load regulation specifications do not include the effects of self-heating.
Note 4: Thermal hysteresis is defined as the change in +25°C output voltage before and after cycling the device from TMAX to TMIN.
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
8_______________________________________________________________________________________
2.498
2.500
2.499
2.501
2.502
OUTPUT VOLTAGE vs. TEMPERATURE
(VOUT = 2.5V)
MAX6143toc01
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
-50 25 50-25 0 75 100 125
THREE TYPICAL PARTS
9.993
9.998
9.995
10.001
9.999
9.996
10.002
9.997
9.994
10.000
10.003
OUTPUT VOLTAGE vs. TEMPERATURE
(VOUT = 10V)
MAX6143toc02
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
-50 25 50-25 0 75 100 125
THREE TYPICAL PARTS
0.50
0.25
0
-0.25
-0.50 015510 202530
LOAD REGULATION vs.
SOURCE CURRENT (VOUT = 2.5V)
MAX6143toc03
SOURCE CURRENT (mA)
OUTPUT VOLTAGE CHANGE (mV)
TA = -40°C
TA = +125°C
TA = +25°C
0.50
0.25
0
-0.25
-0.50 015510 202530
LOAD REGULATION
vs. SOURCE CURRENT (VOUT = 10V)
MAX6143toc04
SOURCE CURRENT (mA)
OUTPUT VOLTAGE CHANGE (mV)
TA = +25°C
TA = +125°C
TA = -40°C
1.00
0.75
0.50
0.25
-0.25
0
-0.50 0 1.00.5 1.5 2.0
LOAD REGULATION
vs. SINK CURRENT (VOUT = 2.5V)
MAX6143toc05
SINK CURRENT (mA)
OUTPUT VOLTAGE CHANGE (mV)
TA = +25°C
TA = +125°C
TA = -40°C
2.0
1.5
1.0
0.5
-0.5
0
-1.0 0 1.00.5 1.5 2.0
LOAD REGULATION
vs. SINK CURRENT (VOUT = 10V)
MAX6143toc06
SINK CURRENT (mA)
OUTPUT VOLTAGE CHANGE (mV)
TA = -40°C
TA = +125°C
TA = +25°C
0
60
20
40
80
100
LINE REGULATION vs. TEMPERATURE
(VOUT = 2.5V)
MAX6143toc07
INPUT VOLTAGE (V)
OUTPUT VOLTAGE CHANGE (µV)
0202551015 303540
TA = -40°C
TA = +125°C
TA = +25°C
0
150
50
100
200
250
300
LINE REGULATION vs. TEMPERATURE
(VOUT = 10V)
MAX6143toc08
INPUT VOLTAGE (V)
OUTPUT VOLTAGE CHANGE (µV)
12 28 3216 20 24 36 40
TA = -40°C
TA = +125°C
TA = +25°C
0.5
1.5
1.0
2.0
2.5
MINIMUM INPUT-OUTPUT DIFFERENTIAL
vs. SOURCE CURRENT (VOUT = 2.5V)
MAX6143toc09
SOURCE CURRENT (mA)
DROPOUT VOLTAGE (V)
0121648 20
TA = -40°C
TA = +125°C
TA = +25°C
Typical Operating Characteristics
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA= +25°C, unless otherwise noted.)
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
_______________________________________________________________________________________ 9
0.5
1.5
1.0
2.0
2.5
MINIMUM INPUT-OUTPUT DIFFERENTIAL
vs. SOURCE CURRENT (VOUT = 10V)
MAX6143toc10
SOURCE CURRENT (mA)
DROPOUT VOLTAGE (V)
0121648 20
TA = -40°C
TA = +125°C
TA = +25°C
-140
-100
-120
-60
-80
-20
-40
0
0.001 0.1 10.01 10 100 1000
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VOUT = 2.5V)
MAX6143toc11
FREQUENCY (kHz)
PSRR (dB)
-120
-100
-60
-80
-20
-40
0
0.001 0.1 10.01 10 100 1000
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VOUT = 10V)
MAX6143toc12
FREQUENCY (kHz)
PSRR (dB)
0.001
0.1
0.01
10
1
100
0.1 10.01 10 100 1000
OUTPUT IMPEDANCE vs. FREQUENCY
(VOUT = 2.5V)
MAX6143toc13
FREQUENCY (kHz)
OUTPUT IMPEDANCE (Ω)
0
100
50
200
150
250
300
350
400
0101552025303540
SUPPLY CURRENT vs. INPUT VOLTAGE
(VOUT = 2.5V)
MAX6143toc14
INPUT VOLTAGE (V)
SUPPLY CURRENT (µA)
TA = -40°C
TA = +125°C
TA = +25°C
0
100
50
200
150
250
300
350
400
0101552025303540
SUPPLY CURRENT vs. INPUT VOLTAGE
(VOUT = 10V)
MAX6143toc15
INPUT VOLTAGE (V)
SUPPLY CURRENT (µA)
TA = -40°C
TA = +125°C
TA = +25°C
250
300
275
325
350
-50 -25 0 25 50 75 100 125
SUPPLY CURRENT vs. TEMPERATURE
(VOUT = 2.5V)
MAX6143toc16
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
250
325
300
275
350
375
-50 -25 0 25 50 75 100 125
SUPPLY CURRENT vs. TEMPERATURE
(VOUT = 10V)
MAX6143toc17
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
0.01
1
0.1
10
100
-50 -25 0 25 50 75 100 125
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE (VOUT = 2.5V)
MAX6143toc18
TEMPERATURE (°C)
SHUTDOWN CURRENT (nA)
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA= +25°C, unless otherwise noted.)
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
10 ______________________________________________________________________________________
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA= +25°C, unless otherwise noted.)
0.01
1
0.1
10
100
-50 -25 0 25 50 75 100 125
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE (VOUT = 10V)
MAX6143toc19
TEMPERATURE (°C)
SHUTDOWN CURRENT (nA)
400
600
500
700
800
-50 -25 0 25 50 75 100 125
TEMP VOLTAGE
vs. TEMPERATURE (VOUT = 2.5V)
MAX6143toc20
TEMPERATURE (°C)
TEMP VOLTAGE (mV)
400
600
500
800
700
900
-50 -25 0 25 50 75 100 125
TEMP VOLTAGE
vs. TEMPERATURE (VOUT = 10V)
MAX6143toc21
TEMPERATURE (°C)
TEMP VOLTAGE (mV)
2.35
2.50
2.45
2.40
2.60
2.55
2.65
0 0.5 1.0 1.5 2.0 2.5
OUTPUT VOLTAGE
vs. TRIM VOLTAGE (VOUT = 2.5V)
MAX6143toc22
TRIM VOLTAGE (V)
OUTPUT VOLTAGE (V)
2.498
2.500
2.499
2.501
2.502
0 200 400 600 800 1000
LONG-TERM STABILITY vs. TIME
(VOUT = 2.500V)
MAX6143toc23
TIME (hours)
VOUT (V)
TWO TYPICAL PARTS
9.998
10.000
9.999
10.001
10.002
0 200 400 600 800 1000
LONG-TERM STABILITY vs. TIME
(VOUT = 10.0V)
MAX6143toc24
TIME (hours)
VOUT (V)
TWO TYPICAL PARTS
1000
100
OUTPUT VOLTAGE-NOISE DENSITY
vs. FREQUENCY (VOUT = 2.5V)
MAX6143toc25
FREQUENCY (Hz)
OUTPUT VOLTAGE-NOISE DENSITY (nV/√Hz)
0.1 100 1000110
10,000
1000
100
OUTPUT VOLTAGE-NOISE DENSITY
vs. FREQUENCY (VOUT = 10V)
MAX6143toc26
FREQUENCY (Hz)
OUTPUT VOLTAGE-NOISE DENSITY (nV/√Hz)
0.1 100 1000110
0.1Hz TO 10Hz OUTPUT NOISE
MAX6143toc27
1µV/div
1s/div
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
______________________________________________________________________________________ 11
0.1Hz TO 10Hz OUTPUT NOISE
MAX6143toc28
4µV/div
1s/div
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 0, 0 TO 20mA)
MAX6413toc29
IOUT
VOUT
AC-COUPLED
1V/div
0
20mA
10µs/div
LOAD TRANSIENT
(VOUT = 10V, COUT = 0, 0 TO 20mA)
MAX6413toc30
IOUT
VOUT
AC-COUPLED
1V/div
0
20mA
10µs/div
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 1µF, 0 TO +20mA)
MAX6413toc31
IOUT
VOUT
AC-COUPLED
50mV/div
0
20mA
200µs/div
LOAD TRANSIENT
(VOUT = 10V, COUT = 1µF, 0 TO 20mA)
MAX6413toc32
IOUT
VOUT
AC-COUPLED
100mV/div
0
20mA
100µs/div
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 0, 0 TO -2mA)
MAX6413toc33
IOUT
VOUT
AC-COUPLED
200mV/div
0
-2mA
40µs/div
LOAD TRANSIENT
(VOUT = 10V, COUT = 0, 0 TO -2mA)
MAX6413toc34
IOUT
VOUT
AC-COUPLED
20mV/div
0
-2mA
200µs/div
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 1µF, 0 TO -2mA)
MAX6413toc35
IOUT
VOUT
AC-COUPLED
20mV/div
0
-2mA
400µs/div
LOAD TRANSIENT
(VOUT = 10V, COUT = 1µF, 0 TO -2mA)
MAX6413toc36
IOUT
VOUT
AC-COUPLED
5mV/div
0
-2mA
400µs/div
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA= +25°C, unless otherwise noted.)
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
12 ______________________________________________________________________________________
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA= +25°C, unless otherwise noted.)
LINE TRANSIENT
(VOUT = 2.5V)
MAX6413toc37
VIN
VOUT
AC-COUPLED
200mV/div
5.5V
4.5V
10µs/div
COUT = 0
LINE TRANSIENT
(VOUT = 10V)
MAX6413toc38
VIN
1V/div
VOUT
AC-COUPLED
200mV/div
15.5V
14.5V
2µs/div
TURN-ON TRANSIENT
(VOUT = 2.5V, COUT = 0)
MAX6413toc39
VIN
2V/div
VOUT
1V/div
GND
GND
10µs/div
COUT = 0
TURN-ON TRANSIENT
(VOUT = 2.5V, COUT = 1µF)
MAX6413toc40
VIN
2V/div
VOUT
1V/div
GND
GND
40µs/div
TURN-ON TRANSIENT
(VOUT = 10V, COUT = 0)
MAX6413toc41
VIN
5V/div
VOUT
5V/div
GND
GND
100µs/div
TURN-ON TRANSIENT
(VOUT = 10V, COUT = 1µF)
MAX6413toc42
VIN
5V/div
VOUT
5V/div
GND
GND
200µs/div
SHUTDOWN TRANSIENT
(VOUT = 2.5V, VIN = 5V, COUT = 0)
MAX6413toc43
VSHDN
2V/div
VOUT
1V/div
GND
GND
10µs/div
SHUTDOWN TRANSIENT
(VOUT = 2.5V, VIN = 5V, COUT = 1µF)
MAX6413toc44
VSHDN
2V/div
+5V
VOUT
1V/div
GND
GND
40µs/div
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-coeffi-
cient curvature-correction circuit and laser-trimmed thin-
film resistors that result in a very low 3ppm/°C
temperature coefficient and excellent 0.05% initial accu-
racy. The MAX6143 draws 340µA of supply current and
sources 30mA or sinks 2mA of load 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:
∆VOUT = 2 x (VTRIM - VTRIM (open)) x k
where:
VTRIM = 0 to VOUT
VTRIM (open) = VOUT (nominal) / 2 (typ)
k = ±6% typ
For example, use a 50kΩpotentiometer (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 1MΩor
less. Currents through resistors R1 and R2 add to the
quiescent supply current.
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA= +25°C, unless otherwise noted.)
SHUTDOWN TRANSIENT
(VOUT = 10V, VIN = 15V, COUT = 0)
MAX6413toc45
VSHDN
5V/div
VOUT
5V/div
GND
GND
100µs/div
SHUTDOWN TRANSIENT
(VOUT = 10V, VIN = 15V, COUT = 1µF)
MAX6143toc46
VSHDN
5V/div
VOUT
5V/div
GND
GND
100µs/div
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
______________________________________________________________________________________ 13
PIN NAME FUNCTION
1, 8 I.C. Internally Connected. Do not connect externally.
2INPositive Power-Supply Input
3TEMP Temperature Proportional Output Voltage. TEMP generates an output voltage proportional to the die
temperature.
4GND Ground
5TRIM 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.
6OUT Output Voltage
7SHDN Active-Low Shutdown. Connect SHDN to IN for normal operation.
Pin Description
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
14 ______________________________________________________________________________________
Temp Output
The MAX6143 provides a temperature output propor-
tional 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,
TA= the ambient temperature.
Self-heating affects the die temperature and converse-
ly, the TEMP output. The TEMP equation assumes the
output is not loaded. If device power dissipation is neg-
ligible, then TJ≈TA.
Applications Information
Bypassing/Output Capacitance
For the best line-transient performance, decouple the
input with a 0.1µF 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 100µF.
In applications where the load or the supply can experi-
ence 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.
Supply Current
The MAX6143 consumes 340µA of quiescent supply
current. This improved efficiency reduces power dissi-
pation and extends battery life.
Shutdown
The active-low shutdown feature reduces supply cur-
rent to 0.01µA (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= +25°C 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 ther-
mal hysteresis value is 120ppm.
Turn-On Time
The MAX6143 typically turns on and settles to within
0.1% of the preset output voltage in 150µs (2.5V
output). The turn-on time can increase up to 150µs with
the device operating at a 1µF 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 cur-
rent is limited to 3mA when short circuiting the output
to the input.
nVatTT
TmV K
TEMP J
( )
./==≅°
0
019
TEMPERATURE
COEFFICIENT
(ppm/°C)
110 100
16-BIT
14-BIT
12-BIT
10-BIT
8-BIT
0.01
0.1
10
100
1000
1
10,000
18-BIT
20-BIT
OPERATING TEMPERATURE RANGE (TMAX - TMIN) (°C)
Figure 1. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error
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 resolu-
tion limit through the operating temperature range.
Figure 1 shows the maximum allowable reference-volt-
age 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 ref-
erence-voltage temperature coefficient as the only
parameter affecting accuracy.
In reality, the absolute static accuracy of a data con-
verter is dependent on the combination of many para-
meters such as integral nonlinearity, differential
nonlinearity, offset error, gain error, as well as voltage-
reference changes.
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
______________________________________________________________________________________ 15
IN
OUT
GND
*OPTIONAL.
*
( VOUT + 2V) TO 40V INPUT
REFERENCE
OUTPUT
MAX5436
50kΩ
POTENTIOMETER
SHDN
TRIM
TEMP
MAX6143
Figure 2. Applications Circuit Using the MAX5436 Potrntiometer
Chip Information
TRANSISTOR COUNT: 429
PROCESS: BiCMOS
OUT
TRIMGND
*INTERNALLY CONNECTED. DO NOT CONNECT.
1
2
8
7
I.C.*
SHDNIN
TEMP
I.C.*
SO
TOP VIEW
3
4
6
5
MAX6143
Pin Configuration
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
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
©2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
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
PACKAGE OUTLINE, .150" SOIC
1
1
21-0041 B
REV.DOCUMENT CONTROL NO.APPROVAL
PROPRIETARY INFORMATION
TITLE:
TOP VIEW
FRONT VIEW
MAX
0.010
0.069
0.019
0.157
0.010
INCHES
0.150
0.007
E
C
DIM
0.014
0.004
B
A1
MIN
0.053A
0.19
3.80 4.00
0.25
MILLIMETERS
0.10
0.35
1.35
MIN
0.49
0.25
MAX
1.75
0.050
0.016L0.40 1.27
0.3940.386D
D
MINDIM
D
INCHES
MAX
9.80 10.00
MILLIMETERS
MIN MAX
16 AC
0.337 0.344 AB8.758.55 14
0.189 0.197 AA5.004.80 8
NMS012
N
SIDE VIEW
H0.2440.228 5.80 6.20
e0.050 BSC 1.27 BSC
C
HE
eBA1
A
D
0∞-8∞
L
1
VARIATIONS:
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