19-3249; Rev 0; 5/04
High-Precision Voltage References with
Temperature Sensor
General Description
The MAX6173鈥揗AX6177 are low-noise, high-precision
voltage references. The devices feature a proprietary
temperature-coefficient curvature-correction circuit and
laser-trimmed thin-film resistors that result in a very low
3ppm/掳C temperature coefficient and excellent
卤0.06%
initial accuracy. The MAX6173鈥揗AX6177 provide a
TEMP output where the output voltage is proportional to
the die temperature, making the devices suitable for a
wide variety of temperature-sensing applications. The
devices also provide a TRIM input, allowing fine trimming
of the output voltage with a resistive divider network. Low
temperature drift and low noise make the devices ideal
for use with high-resolution A/D or D/A converters.
The MAX6173鈥揗AX6177 provide accurate preset +2.5V,
+3.3V, +4.096V, +5.0V, and +10V reference voltages and
accept input voltages up to +40V. The devices draw
320碌A (typ) of supply current and source 30mA or sink
2mA of load current. The MAX6173鈥揗AX6177 use
bandgap technology for low-noise performance and
excellent accuracy. The MAX6173鈥揗AX6177 do not
require an output bypass capacitor for stability, and are
stable with capacitive loads up to 100碌F. Eliminating the
output bypass capacitor saves valuable board area in
space-critical applications.
The MAX6173鈥揗AX6177 are available in an 8-pin SO
package and operate over the automotive (-40掳C to
+125掳C) temperature range.
Features
鈾?/div>
Wide (V
OUT
+ 2V) to +40V Supply Voltage Range
鈾?/div>
Excellent Temperature Stability: 3ppm/掳C (max)
鈾?/div>
Tight Initial Accuracy: 0.05% (max)
鈾?/div>
Low Noise: 3.8碌V
P-P
(typ at 2.5V Output)
鈾?/div>
Sources up to 30mA Output Current
鈾?/div>
Low Supply Current: 450碌A (max at +25掳C)
鈾?/div>
Linear Temperature Transducer Voltage Output
鈾?/div>
+2.5V, +3.3V, +4.096V, +5.0V, or +10V Output
Voltages
鈾?/div>
Wide Operating Temperature Range: -40掳C to
+125掳C
鈾?/div>
No External Capacitors Required for Stability
鈾?/div>
Short-Circuit Protected
MAX6173鈥揗AX6177
Typical Operating Circuit
(V
OUT
+ 2V) TO 40V INPUT
IN
OUT
REFERENCE
OUTPUT
*
MAX6173鈥揗AX6177
TEMP
GND
TRIM
*
Applications
A/D Converters
D/A Converters
Digital Voltmeters
Voltage Regulators
Threshold Detectors
*OPTIONAL.
*
Pin Configuration appears at end of data sheet.
Ordering Information/Selector Guide
PART
MAX6173AASA
MAX6173BASA
MAX6174AASA
MAX6174BASA
MAX6175AASA
MAX6175BASA
MAX6176AASA
MAX6176BASA
MAX6177AASA
MAX6177BASA
TEMP RANGE
-40掳C to +125掳C
-40掳C to +125掳C
-40掳C to +125掳C
-40掳C to +125掳C
-40掳C to +125掳C
-40掳C to +125掳C
-40掳C to +125掳C
-40掳C to +125掳C
-40掳C to +125掳C
-40掳C to +125掳C
PIN-
PACKAGE
8 SO
8 SO
8 SO
8 SO
8 SO
8 SO
8 SO
8 SO
8 SO
8 SO
OUTPUT
VOLTAGE (V)
2.500
2.500
4.096
4.096
5.000
5.000
10.000
10.000
3.300
3.300
TEMPERATURE COEFFICIENT
(ppm/掳C) -40掳C TO +125掳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
0.05
0.10
0.06
0.10
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
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