19-3249; Rev 0; 5/04
High-Precision Voltage References with
Temperature Sensor
General Description
The MAX6173–MAX6177 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/°C temperature coefficient and excellent
±0.06%
initial accuracy. The MAX6173–MAX6177 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–MAX6177 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
320µA (typ) of supply current and source 30mA or sink
2mA of load current. The MAX6173–MAX6177 use
bandgap technology for low-noise performance and
excellent accuracy. The MAX6173–MAX6177 do not
require an output bypass capacitor for stability, and are
stable with capacitive loads up to 100µF. Eliminating the
output bypass capacitor saves valuable board area in
space-critical applications.
The MAX6173–MAX6177 are available in an 8-pin SO
package and operate over the automotive (-40°C to
+125°C) temperature 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)
♦
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
♦
Short-Circuit Protected
MAX6173–MAX6177
Typical Operating Circuit
(V
OUT
+ 2V) TO 40V INPUT
IN
OUT
REFERENCE
OUTPUT
*
MAX6173–MAX6177
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°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
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/°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
0.05
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’s website at www.maxim-ic.com.
High-Precision Voltage References with
Temperature Sensor
MAX6173–MAX6177
ABSOLUTE MAXIMUM RATINGS
IN to GND ...............................................................-0.3V to +42V
OUT, TRIM, TEMP to GND...........................-0.3V to (V
IN
+ 0.3V)
Output Short Circuit to GND .....................................................5s
Continuous Power Dissipation (T
A
= +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—MAX6173 (V
OUT
= 2.5V)
(V
IN
= +5V, T
A
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
OUTPUT
Output Voltage
Output Adjustment Range
Output-Voltage
Temperature Coefficient
(Note 2)
Line Regulation (Note 3)
V
OUT
∆V
TRIM
TCV
OUT
No load, T
A
= +25°C
R
POT
= 10kΩ
MAX6173AASA
T
A
= -40°C to +125°C
MAX6173BASA
∆V
OUT
/
∆V
IN
4.5V
≤
V
IN
≤
40V
Sourcing:
0
≤
I
OUT
≤
10mA
Sinking:
-0.6mA
≤
I
OUT
≤
0
OUT shorted to GND
OUT shorted to IN
T
A
= +25°C
T
A
= -40°C to +125°C
T
A
= +25°C
T
A
= -40°C to +125°C
T
A
= +25°C
T
A
= -40°C to +125°C
3
0.6
0.8
2
2
50
90
60
3
120
1000 hours at T
A
= +25°C
50
10
5
10
10
15
500
900
mA
ppm
ppm
ppm/mA
ppm/V
MAX6173A (0.06%)
MAX6173B (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)
∆V
OUT
/
∆I
OUT
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
TEMP OUTPUT
TEMP Output Voltage
TEMP Temperature
Coefficient
I
SC
∆V
OUT
/
cycle
∆V
OUT
/
time
e
OUT
t
R
V
IN
I
IN
f = 0.1Hz to 10Hz
f = 10Hz to 1kHz
To V
OUT
= 0.1% of final value, C
OUT
= 50pF
Guaranteed by line regulation test
No load
T
A
= +25°C
T
A
= -40°C to +125°C
4.5
3.8
6.8
150
40.0
300
450
600
570
1.9
µV
P-P
µV
RMS
µs
V
µA
V
TEMP
TC
TEMP
mV
mV/°C
2
_______________________________________________________________________________________
Embedded System
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