MAXIM MAX6143BASA33

19-3168; Rev 1; 4/04
High-Precision Voltage Reference with
Temperature Sensor
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
Typical Operating Circuit
( VOUT + 2V) TO 40V INPUT
IN
SHDN
*
REFERENCE
OUTPUT
OUT
*
MAX6143
TEMP
TRIM
GND
*OPTIONAL.
*
Applications
A/D Converters
Voltage Regulators
D/A Converters
Threshold Detectors
Digital Voltmeters
Pin Configuration appears at end of data sheet.
Ordering Information/Selector Guide
TEMP RANGE
PINPACKAGE
OUTPUT
VOLTAGE (V)
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
PART
TEMPERATURE COEFFICIENT
(ppm/°C) 40°C TO +125°C
INITIAL
ACCURACY (%)
________________________________________________________________ Maxim Integrated Products
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.
1
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
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 spacecritical applications.
The MAX6143 is available in an 8-pin SO package and
operates over the automotive (-40°C to +125°C) temperature range.
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
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 = +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
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 = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
MAX6143A_25 (0.06%)
2.4985
2.5
2.5015
MAX6143B_25 (0.1%)
2.4975
2.5
2.5025
±3
±6
UNITS
OUTPUT
Output Voltage
VOUT
No load, TA = +25°C
Output Adjustment Range
∆VTRIM
RPOT = 10kΩ
Output-Voltage
Temperature Coefficient
(Note 2)
TCVOUT
TA = -40°C to +125°C
Line Regulation (Note 3)
Load Regulation (Note 3)
Output Short-Circuit
Current
∆VOUT / ∆VIN 4.5V ≤ VIN ≤ 40V
∆VOUT /
∆IOUT
ISC
Temperature Hysteresis
(Note 4)
∆VOUT/
cycle
Long-Term Stability
∆VOUT/
time
Sourcing:
0 ≤ IOUT ≤ 10mA
Sinking:
-0.6mA ≤ IOUT ≤ 0
V
%
MAX6143AASA
1.5
3
MAX6143BASA
3
10
TA = +25°C
0.6
5
TA = -40°C to +125°C
0.8
10
ppm/°C
TA = +25°C
2
10
TA = -40°C to +125°C
2
15
TA = +25°C
50
500
90
900
TA = -40°C to +125°C
OUT shorted to GND
60
OUT shorted to IN
3
ppm/V
ppm/mA
mA
120
ppm
1000 hours at TA = +25°C
50
ppm
f = 0.1Hz to 10Hz
3.8
µVP-P
f = 10Hz to 1kHz
6.8
µVRMS
To VOUT = 0.1% of final value, COUT = 50pF
150
µs
DYNAMIC
Noise Voltage
Turn-On Settling Time
eOUT
tR
INPUT
Supply Voltage Range
VIN
Guaranteed by line regulation test
Quiescent Supply Current
IIN
No load, normal
operation
Shutdown Supply Current
ISHDN
2
No load, VSHDN <
0.8V
TA = +25°C
4.5
40.0
300
TA = -40°C to +125°C
TA = -40°C to +125°C
450
600
0.01
_______________________________________________________________________________________
5
V
µA
µA
High-Precision Voltage Reference with
Temperature Sensor
MAX6143
ELECTRICAL CHARACTERISTICS—MAX6143_25 (VOUT = 2.5V) (continued)
(VIN = V SHDN = +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
SHUTDOWN (SHDN)
Logic-High Input Voltage
VIH
Logic-Low Input Voltage
VIL
2.0
0.8
V
V
Logic-High Input Current
IIH
20
µA
Logic-Low Input Current
IIL
2
µA
TEMP OUTPUT
TEMP Output Voltage
TEMP Temperature
Coefficient
VTEMP
570
mV
TCTEMP
1.9
mV/°C
ELECTRICAL CHARACTERISTICS—MAX6143_33 (VOUT = 3.3V)
(VIN = V SHDN = +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
MAX6143A_33 (0.06%)
3.2980
3.3
3.3020
MAX6143B_33 (0.1%)
3.2967
3.3
3.3033
±3
±6
UNITS
OUTPUT
Output Voltage
VOUT
No load, TA = +25°C
Output Adjustment Range
∆VTRIM
RPOT = 10kΩ
Output-Voltage
Temperature Coefficient
(Note 2)
TCVOUT
TA = -40°C to +125°C
Line Regulation (Note 3)
∆VOUT /
∆VIN
Load Regulation (Note 3)
∆VOUT /
∆IOUT
Output Short-Circuit Current
ISC
Temperature Hysteresis
(Note 4)
∆VOUT/
cycle
Long-Term Stability
∆VOUT/
time
5.3V ≤ VIN ≤ 40V
Sourcing:
0 ≤ IOUT ≤ 10mA
Sinking:
-0.6mA ≤ IOUT ≤ 0
V
%
MAX6143AASA
1.5
3
MAX6143BASA
3
10
ppm/°C
TA = +25°C
0.6
5
TA = -40°C to +125°C
0.8
10
10
TA = +25°C
2
TA = -40°C to +125°C
2
15
TA = +25°C
50
500
90
900
TA = -40°C to +125°C
OUT shorted to GND
60
OUT shorted to IN
3
ppm/V
ppm/
mA
mA
120
ppm
50
ppm
5
µVP-P
f = 10Hz to 1kHz
9.3
µVRMS
To VOUT = 0.1% of final value, COUT = 50pF
180
µs
1000 hours at TA = +25°C
DYNAMIC
Noise Voltage
eOUT
Turn-On Settling Time
tR
f = 0.1Hz to 10Hz
_______________________________________________________________________________________
3
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
ELECTRICAL CHARACTERISTICS—MAX6143_33 (VOUT = 3.3V) (continued)
(VIN = V SHDN = +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
40.0
V
INPUT
Supply Voltage Range
VIN
Guaranteed by line regulation test
Quiescent Supply Current
IIN
No load, normal
operation
Shutdown Supply Current
ISHDN
5.3
TA = +25°C
320
TA = -40°C to +125°C
No load, VSHDN <
0.8V
500
650
TA = -40°C to +125°C
0.01
µA
5
µA
SHUTDOWN (SHDN)
Logic-High Input Voltage
VIH
Logic-Low Input Voltage
VIL
2.0
0.8
V
V
Logic-High Input Current
IIH
20
µA
Logic-Low Input Current
IIL
2
µA
TEMP OUTPUT
TEMP Output Voltage
TEMP Temperature
Coefficient
VTEMP
630
mV
TCTEMP
2.1
mV/°C
ELECTRICAL CHARACTERISTICS—MAX6143_41 (VOUT = 4.096V)
(VIN = V SHDN = +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
MAX6143A_41 (0.06%)
4.0935
4.096
4.0985
MAX6143B_41 (0.1%)
4.0919
4.096
4.1001
UNITS
OUTPUT
Output Voltage
Output Adjustment Range
VOUT
∆VTRIM
No load, TA = +25°C
RPOT = 10kΩ
Output-Voltage Temperature
Coefficient (Note 2)
TCVOUT
TA = -40°C to +125°C
Line Regulation (Note 3)
∆VOUT/
∆VIN
6.1V ≤ VIN ≤ 40V
Load Regulation (Note 3)
∆VOUT/
∆IOUT
Output Short-Circuit Current
ISC
Temperature Hysteresis
(Note 4)
∆VOUT/
cycle
Long-Term Stability
∆VOUT/
time
4
Sourcing:
0 ≤ IOUT ≤ 10mA
Sinking:
-0.6mA ≤ IOUT ≤ 0
±3
%
±6
MAX6143AASA
1.5
3
MAX6143BASA
3
10
TA = +25°C
0.6
5
TA = -40°C to +125°C
0.8
10
10
TA = +25°C
2
TA = -40°C to +125°C
2
15
TA = +25°C
50
500
90
900
TA = -40°C to +125°C
OUT shorted to GND
60
OUT shorted to IN
3
1000 hours at TA = +25°C
V
ppm/°C
ppm/V
ppm/mA
mA
120
ppm
50
ppm
_______________________________________________________________________________________
High-Precision Voltage Reference with
Temperature Sensor
(VIN = V SHDN = +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
Noise Voltage
eOUT
Turn-On Settling Time
tR
f = 0.1Hz to 10Hz
7
µVP-P
f = 10Hz to 1kHz
11.5
µVRMS
To VOUT = 0.1% of final value, COUT = 50pF
200
µs
INPUT
Supply Voltage Range
VIN
Guaranteed by line regulation test
Quiescent Supply Current
IIN
No load, normal
operation
Shutdown Supply Current
ISHDN
6.1
TA = +25°C
40.0
320
TA = -40°C to +125°C
No load, VSHDN <
0.8V
500
650
TA =-40°C to +125°C
0.01
V
µA
5
µA
SHUTDOWN (SHDN)
Logic-High Input Voltage
VIH
Logic-Low Input Voltage
VIL
2.0
0.8
V
V
Logic-High Input Current
IIH
20
µA
Logic-Low Input Current
IIL
2
µA
TEMP OUTPUT
TEMP Output Voltage
TEMP Temperature
Coefficient
VTEMP
TCTEMP
(0.06%)
630
mV
2.1
mV/°C
ELECTRICAL CHARACTERISTICS—MAX6143_50 (VOUT = 5.0V)
(VIN = V SHDN = +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
MAX6143A_50 (0.06%)
4.9970
5.0
5.0030
MAX6143B_50 (0.1%)
4.9950
5.0
5.0050
±3
±6
UNITS
OUTPUT
Output Voltage
VOUT
No load, TA = +25°C
Output Adjustment Range
∆VTRIM
RPOT = 10kΩ
Output-Voltage
Temperature Coefficient
(Note 2)
TCVOUT
TA = -40°C to +125°C
Line Regulation (Note 3)
∆VOUT /
∆VIN
Load Regulation (Note 3)
∆VOUT /
∆IOUT
7V ≤ VIN ≤ 40V
Sourcing:
0 ≤ IOUT ≤ 10mA
Sinking:
-0.6mA ≤ IOUT ≤ 0
V
%
MAX6143AASA
1.5
3
MAX6143BASA
3
10
ppm/°C
TA = +25°C
0.6
5
TA = -40°C to +125°C
0.8
10
10
TA = +25°C
2
TA = -40°C to +125°C
2
15
TA = +25°C
50
500
TA = -40°C to +125°C
90
900
ppm/V
ppm/mA
_______________________________________________________________________________________
5
MAX6143
ELECTRICAL CHARACTERISTICS—MAX6143_41 (VOUT = 4.096V) (continued)
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
ELECTRICAL CHARACTERISTICS—MAX6143_50 (VOUT = 5.0V) (continued)
(VIN = V SHDN = +15V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
Output Short-Circuit Current
ISC
Temperature Hysteresis
(Note 4)
∆VOUT/
cycle
Long-Term Stability
∆VOUT/
time
CONDITIONS
MIN
TYP
OUT shorted to GND
60
OUT shorted to IN
3
1000 hours at TA = +25°C
MAX
UNITS
mA
120
ppm
50
ppm
DYNAMIC
Noise Voltage
Turn-On Settling Time
eOUT
tR
f = 0.1Hz to 10Hz
9
µVP-P
f = 10Hz to 1kHz
14.5
µVRMS
To VOUT = 0.1% of final value, COUT = 50pF
230
µs
INPUT
Supply Voltage Range
VIN
Quiescent Supply Current
IIN
Shutdown Supply Current
ISHDN
Guaranteed by line regulation test
7
TA = +25°C
No load, normal
operation
40
320
TA = -40°C to +125°C
No load, VSHDN <
0.8V
550
700
TA = -40°C to +125°C
0.01
V
µA
5
µA
SHUTDOWN (SHDN)
Logic-High Input Voltage
VIH
Logic-Low Input Voltage
VIL
2.0
0.8
V
V
Logic-High Input Current
IIH
20
µA
Logic-Low Input Current
IIL
2
µA
TEMP OUTPUT
TEMP Output Voltage
TEMP Temperature
Coefficient
VTEMP
630
mV
TCTEMP
2.1
mV/°C
ELECTRICAL CHARACTERISTICS—MAX6143_10 (VOUT = 10V)
(VIN = V SHDN = +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
MAX6143A_10 (0.05%)
9.995
10.0
10.005
MAX6143B_10 (0.1%)
9.990
10.0
10.010
±3
±6
UNITS
OUTPUT
Output Voltage
VOUT
No load, TA = +25°C
Output Adjustment Range
∆VTRIM
RPOT = 10kΩ
Output-Voltage
Temperature Coefficient
(Note 2)
TCVOUT
TA = -40°C to +125°C
Line Regulation (Note 3)
∆VOUT/
∆VIN
6
12V ≤ VIN ≤ 40V
V
%
MAX6143AASA
1.5
3
MAX6143BASA
3
10
TA = +25°C
0.6
5
TA = -40°C to +125°C
0.8
10
ppm/°C
_______________________________________________________________________________________
ppm/V
High-Precision Voltage Reference with
Temperature Sensor
(VIN = V SHDN = +15V, TA = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
Load Regulation (Note 3)
Output Short-Circuit
Current
SYMBOL
∆VOUT/
∆IOUT
ISC
Temperature Hysteresis
(Note 4)
∆VOUT/
cycle
Long-Term Stability
∆VOUT/
time
CONDITIONS
Sourcing:
0 ≤ IOUT ≤ 10mA
Sinking:
-0.6mA ≤ IOUT ≤ 0
TYP
MAX
TA = +25°C
MIN
2
10
TA = -40°C to +125°C
2
15
TA = +25°C
50
500
90
900
TA = -40°C to +125°C
OUT shorted to GND
60
OUT shorted to IN
3
UNITS
ppm/mA
mA
120
ppm
1000 hours at TA = +25°C
50
ppm
f = 0.1Hz to 10Hz
18
µVP-P
f = 10Hz to 1kHz
29
µVRMS
To VOUT = 0.1% of final value, COUT = 50pF
400
µs
DYNAMIC
Noise Voltage
eOUT
Turn-On Settling Time
tR
INPUT
Supply Voltage Range
VIN
Guaranteed by line regulation test
Quiescent Supply Current
IIN
No load, normal
operation
Shutdown Supply Current
ISHDN
No load, VSHDN <
0.8V
12
TA = +25°C
40
340
TA = -40°C to +125°C
550
700
TA = -40°C to +125°C
0.01
5
V
µA
µA
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
2
µA
TEMP OUTPUT
TEMP Output Voltage
TEMP Temperature
Coefficient
Note 1:
Note 2:
Note 3:
Note 4:
VTEMP
630
mV
TCTEMP
2.1
mV/°C
All devices are 100% production tested at TA = +25°C 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 +25°C output voltage before and after cycling the device from TMAX to TMIN.
_______________________________________________________________________________________
7
MAX6143
ELECTRICAL CHARACTERISTICS—MAX6143_10 (VOUT = 10V) (continued)
Typical Operating Characteristics
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.)
10.001
OUTPUT VOLTAGE (V)
2.499
9.998
9.997
9.996
9.995
9.994
THREE TYPICAL PARTS
2.498
-25
0
25
50
75
100
125
-50
0
-0.25
TA = +125°C
-25
0
25
50
75
100
-0.50
125
0
5
10
15
20
25
TEMPERATURE (°C)
SOURCE CURRENT (mA)
LOAD REGULATION
vs. SOURCE CURRENT (VOUT = 10V)
LOAD REGULATION
vs. SINK CURRENT (VOUT = 2.5V)
LOAD REGULATION
vs. SINK CURRENT (VOUT = 10V)
TA = +125°C
0
-0.25
TA = -40°C
TA = +25°C
0.50
TA = +125°C
0.25
0
TA = -40°C
-0.25
-0.50
0
5
10
15
20
25
30
30
MAX6143toc06
MAX6143toc05
0.75
2.0
OUTPUT VOLTAGE CHANGE (mV)
0.25
OUTPUT VOLTAGE CHANGE (mV)
MAX6143toc04
TA = +25°C
1.00
-0.50
1.5
TA = -40°C
1.0
TA = +125°C
0.5
0
TA = +25°C
-0.5
-1.0
0
0.5
1.0
1.5
2.0
0
0.5
1.0
1.5
2.0
SOURCE CURRENT (mA)
SINK CURRENT (mA)
SINK CURRENT (mA)
LINE REGULATION vs. TEMPERATURE
(VOUT = 2.5V)
LINE REGULATION vs. TEMPERATURE
(VOUT = 10V)
MINIMUM INPUT-OUTPUT DIFFERENTIAL
vs. SOURCE CURRENT (VOUT = 2.5V)
TA = -40°C
60
TA = +125°C
40
20
TA = +125°C
200
TA = -40°C
150
100
50
10
15
20
25
INPUT VOLTAGE (V)
30
35
40
2.0
TA = +125°C
1.5
TA = +25°C
1.0
TA = -40°C
TA = +25°C
0.5
0
5
MAX6143toc09
250
TA = +25°C
0
2.5
MAX6143toc08
80
300
OUTPUT VOLTAGE CHANGE (µV)
MAX6143toc07
100
8
TA = +25°C
TEMPERATURE (°C)
0.50
0
TA = -40°C
0.25
THREE TYPICAL PARTS
9.993
-50
OUTPUT VOLTAGE CHANGE (mV)
9.999
DROPOUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
2.500
10.000
0.50
MAX6143toc03
10.002
2.501
LOAD REGULATION vs.
SOURCE CURRENT (VOUT = 2.5V)
MAX6143toc02
10.003
MAX6143toc01
2.502
OUTPUT VOLTAGE vs. TEMPERATURE
(VOUT = 10V)
OUTPUT VOLTAGE CHANGE (mV)
OUTPUT VOLTAGE vs. TEMPERATURE
(VOUT = 2.5V)
OUTPUT VOLTAGE CHANGE (µV)
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
12
16
20
24
28
32
INPUT VOLTAGE (V)
36
40
0
4
8
12
SOURCE CURRENT (mA)
_______________________________________________________________________________________
16
20
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 = +25°C, unless otherwise noted.)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VOUT = 2.5V)
-20
-40
PSRR (dB)
TA = +125°C
1.5
-20
TA = +25°C
-40
PSRR (dB)
DROPOUT VOLTAGE (V)
2.0
0
MAX6143toc11
0
MAX6143toc10
2.5
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VOUT = 10V)
-60
-80
-60
-80
-100
TA = -40°C
1.0
-100
-120
-140
0.001
0.5
0
4
8
12
16
20
0.1
1
10
100
-120
0.001
1000
0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
FREQUENCY (kHz)
OUTPUT IMPEDANCE vs. FREQUENCY
(VOUT = 2.5V)
SUPPLY CURRENT vs. INPUT VOLTAGE
(VOUT = 2.5V)
SUPPLY CURRENT vs. INPUT VOLTAGE
(VOUT = 10V)
1
0.1
0.01
0.001
300
TA = +25°C
250
TA = -40°C
200
150
0.1
1
10
100
250
TA = +25°C
200
TA = -40°C
150
100
50
50
1000
MAX6143toc15
300
100
0
0.01
TA = +125°C
350
SUPPLY CURRENT (µA)
10
TA = +125°C
350
400
MAX6143toc14
MAX6143toc13
400
SUPPLY CURRENT (µA)
0
0
5
10
15
20
25
30
35
40
0
5
10
15
20
25
30
35
FREQUENCY (kHz)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
SUPPLY CURRENT vs. TEMPERATURE
(VOUT = 2.5V)
SUPPLY CURRENT vs. TEMPERATURE
(VOUT = 10V)
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE (VOUT = 2.5V)
300
275
325
300
275
250
250
-50
-25
0
25
50
75
TEMPERATURE (°C)
100
125
100
SHUTDOWN CURRENT (nA)
350
SUPPLY CURRENT (µA)
325
40
MAX6143toc18
375
MAX6143toc16
350
MAX6143toc17
OUTPUT IMPEDANCE (Ω)
0.01
SOURCE CURRENT (mA)
100
SUPPLY CURRENT (µA)
MAX6143toc12
MINIMUM INPUT-OUTPUT DIFFERENTIAL
vs. SOURCE CURRENT (VOUT = 10V)
10
1
0.1
0.01
-50
-25
0
25
50
75
TEMPERATURE (°C)
100
125
-50
-25
0
25
50
75
100
125
TEMPERATURE (°C)
_______________________________________________________________________________________
9
Typical Operating Characteristics (continued)
(VIN = +5V for VOUT = +2.5V, VIN = +15V for VOUT = +10V, IOUT = 0, TA = +25°C, unless otherwise noted.)
800
1
0.1
TEMP VOLTAGE (mV)
700
TEMP VOLTAGE (mV)
10
900
MAX6143toc20
MAX6143toc19
800
TEMP VOLTAGE
vs. TEMPERATURE (VOUT = 10V)
600
500
0.01
400
-25
0
25
50
75
100
125
400
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
OUTPUT VOLTAGE
vs. TRIM VOLTAGE (VOUT = 2.5V)
LONG-TERM STABILITY vs. TIME
(VOUT = 2.500V)
LONG-TERM STABILITY vs. TIME
(VOUT = 10.0V)
2.502
MAX6143toc22
2.65
2.60
TWO TYPICAL PARTS
125
10.002
TWO TYPICAL PARTS
10.001
2.501
OUTPUT VOLTAGE (V)
600
MAX6143toc24
-50
700
500
MAX6143toc23
SHUTDOWN CURRENT (nA)
100
TEMP VOLTAGE
vs. TEMPERATURE (VOUT = 2.5V)
MAX6143toc21
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE (VOUT = 10V)
2.50
VOUT (V)
VOUT (V)
2.55
2.500
10.000
2.45
9.999
2.499
2.40
2.35
0.5
1.0
1.5
2.0
2.5
0
200
400
600
800
1000
0
200
400
600
TIME (hours)
TIME (hours)
OUTPUT VOLTAGE-NOISE DENSITY
vs. FREQUENCY (VOUT = 2.5V)
OUTPUT VOLTAGE-NOISE DENSITY
vs. FREQUENCY (VOUT = 10V)
0.1Hz TO 10Hz OUTPUT NOISE
1
10
100
FREQUENCY (Hz)
1000
1000
MAX6143toc27
MAX6143toc26
OUTPUT VOLTAGE-NOISE DENSITY (nV/√Hz)
MAX6143toc25
10,000
1000
1µV/div
100
100
0.1
800
TRIM VOLTAGE (V)
1000
10
9.998
2.498
0
OUTPUT VOLTAGE-NOISE DENSITY (nV/√Hz)
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
0.1
1
10
100
FREQUENCY (Hz)
1000
______________________________________________________________________________________
1s/div
High-Precision Voltage Reference with
Temperature Sensor
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 0, 0 TO 20mA)
0.1Hz TO 10Hz OUTPUT NOISE
LOAD TRANSIENT
(VOUT = 10V, COUT = 0, 0 TO 20mA)
MAX6413toc29
MAX6143toc28
MAX6413toc30
20mA
IOUT
20mA
IOUT
0
0
4µV/div
VOUT
AC-COUPLED
1V/div
10µs/div
1s/div
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 1µF, 0 TO +20mA)
10µs/div
LOAD TRANSIENT
(VOUT = 10V, COUT = 1µF, 0 TO 20mA)
MAX6413toc31
VOUT
AC-COUPLED
1V/div
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 0, 0 TO -2mA)
MAX6413toc32
MAX6413toc33
20mA
0
20mA
IOUT
IOUT
IOUT
0
0
-2mA
VOUT
AC-COUPLED
50mV/div
VOUT
AC-COUPLED
100mV/div
VOUT
AC-COUPLED
200mV/div
200µs/div
100µs/div
40µs/div
LOAD TRANSIENT
(VOUT = 10V, COUT = 0, 0 TO -2mA)
LOAD TRANSIENT
(VOUT = 2.5V, COUT = 1µF, 0 TO -2mA)
LOAD TRANSIENT
(VOUT = 10V, COUT = 1µF, 0 TO -2mA)
MAX6413toc34
MAX6413toc36
MAX6413toc35
0
0
0
IOUT
IOUT
-2mA
-2mA
-2mA
VOUT
AC-COUPLED
20mV/div
VOUT
AC-COUPLED
20mV/div
VOUT
AC-COUPLED
5mV/div
IOUT
200µs/div
400µs/div
400µs/div
______________________________________________________________________________________
11
MAX6143
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
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)
TURN-ON TRANSIENT
(VOUT = 2.5V, COUT = 0)
LINE TRANSIENT
(VOUT = 10V)
MAX6413toc37
MAX6413toc38
5.5V
MAX6413toc39
15.5V
VIN
1V/div
14.5V
VIN
4.5V
VIN
2V/div
GND
VOUT
AC-COUPLED
200mV/div
VOUT
AC-COUPLED
200mV/div
VOUT
1V/div
GND
COUT = 0
COUT = 0
2µs/div
10µs/div
TURN-ON TRANSIENT
(VOUT = 10V, COUT = 0)
TURN-ON TRANSIENT
(VOUT = 10V, COUT = 1µF)
10µs/div
TURN-ON TRANSIENT
(VOUT = 2.5V, COUT = 1µF)
MAX6413toc41
MAX6413toc40
MAX6413toc42
VIN
5V/div
VIN
2V/div
VIN
5V/div
GND
GND
GND
VOUT
5V/div
VOUT
5V/div
GND
GND
VOUT
1V/div
GND
100µs/div
40µs/div
SHUTDOWN TRANSIENT
(VOUT = 2.5V, VIN = 5V, COUT = 0)
200µs/div
SHUTDOWN TRANSIENT
(VOUT = 2.5V, VIN = 5V, COUT = 1µF)
MAX6413toc43
MAX6413toc44
+5V
VSHDN
2V/div
VSHDN
2V/div
GND
GND
VOUT
1V/div
VOUT
1V/div
GND
GND
10µs/div
12
40µs/div
______________________________________________________________________________________
High-Precision Voltage Reference with
Temperature Sensor
SHUTDOWN TRANSIENT
(VOUT = 10V, VIN = 15V, COUT = 0)
SHUTDOWN TRANSIENT
(VOUT = 10V, VIN = 15V, COUT = 1µF)
MAX6413toc45
MAX6143toc46
VSHDN
5V/div
VSHDN
5V/div
GND
GND
VOUT
5V/div
VOUT
5V/div
GND
GND
100µs/div
100µs/div
Pin Description
PIN
NAME
FUNCTION
1, 8
I.C.
Internally Connected. Do not connect externally.
2
IN
Positive Power-Supply Input
3
TEMP
Temperature Proportional Output Voltage. TEMP generates an output voltage proportional to the die
temperature.
4
GND
Ground
5
TRIM
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.
6
OUT
Output Voltage
7
SHDN
Active-Low Shutdown. Connect SHDN to IN for normal operation.
∆VOUT = 2 x (VTRIM - VTRIM (open)) x k
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 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:
where:
VTRIM = 0 to VOUT
VTRIM (open) = VOUT (nominal) / 2 (typ)
k = ±6% typ
For example, use a 50kΩ 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 1MΩ or
less. Currents through resistors R1 and R2 add to the
quiescent supply current.
______________________________________________________________________________________
13
MAX6143
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
Temp Output
Supply Current
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,
The MAX6143 consumes 340µA of quiescent supply
current. This improved efficiency reduces power dissipation and extends battery life.
n =
VTEMP (at TJ = T0 )
≅ 1.9mV / °K
T0
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 0.1µF 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 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.
Shutdown
The active-low shutdown feature reduces supply current 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 thermal 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 current is limited to 3mA when short circuiting the output
to the input.
10,000
1000
100
TEMPERATURE
COEFFICIENT
(ppm/°C)
8-BIT
10
10-BIT
12-BIT
1
14-BIT
16-BIT
0.1
18-BIT
0.01
1
10
OPERATING TEMPERATURE RANGE (TMAX - TMIN) (°C)
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
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.
MAX6143
Temperature Coefficient vs. Operating
Temperature Range for a
1 LSB Maximum Error
( VOUT + 2V) TO 40V INPUT
IN
SHDN
*
OUT
REFERENCE
OUTPUT
MAX6143
TEMP
TRIM
MAX5436
50kΩ
POTENTIOMETER
GND
*OPTIONAL.
Figure 2. Applications Circuit Using the MAX5436 Potrntiometer
Pin Configuration
Chip Information
TRANSISTOR COUNT: 429
PROCESS: BiCMOS
TOP VIEW
I.C.*
1
8
I.C.*
IN
2
7
SHDN
3
6
OUT
GND 4
5
TRIM
MAX6143
TEMP
SO
*INTERNALLY CONNECTED. DO NOT CONNECT.
______________________________________________________________________________________
15
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.)
DIM
A
A1
B
C
e
E
H
L
N
E
H
INCHES
MILLIMETERS
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
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
SOICN .EPS
MAX6143
High-Precision Voltage Reference with
Temperature Sensor
1.27
VARIATIONS:
1
INCHES
TOP VIEW
DIM
D
D
D
MIN
0.189
0.337
0.386
MAX
0.197
0.344
0.394
MILLIMETERS
MIN
4.80
8.55
9.80
MAX
5.00
8.75
10.00
N MS012
8
AA
14
AB
16
AC
D
A
B
e
C
0∞-8∞
A1
L
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION
TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL
DOCUMENT CONTROL NO.
21-0041
REV.
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
© 2004 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.