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 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.
Features
♦
Wide (V
OUT
+ 2V) to +40V Supply Voltage Range
♦
Excellent Temperature Stability: 3ppm/°C (max)
♦
Tight Initial Accuracy: 0.05% (max)
♦
Low Noise: 3.8µV
P-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
( V
OUT
+ 2V) TO 40V INPUT
IN
SHDN
OUT
MAX6143
TEMP
GND
*OPTIONAL.
TRIM
REFERENCE
OUTPUT
*
*
*
Applications
A/D Converters
D/A Converters
Digital Voltmeters
PIN-
PACKAGE
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) 40°C TO +125°C
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
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
________________________________________________________________
Maxim Integrated Products
1
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.
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