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Not Recommended for New Designs
This product was manufactured for Maxim by an outside wafer foundry
using a process that is no longer available. It is not recommended for
new designs. The data sheet remains available for existing users.
A Maxim replacement or an industry second-source may be available.
Please see the QuickView data sheet for this part or contact technical
support for assistance.
For further information,
contact Maxim’s Applications Tech Support.
19-0005; Rev 2; 6/97
10µA, Low-Dropout,
Precision Voltage References
General Description
The MAX872/MAX874 precision 2.5V and 4.096V micro-
power voltage references consume a maximum of only
10µA and operate from supply voltages up to 20V. The
combination of ultra-low quiescent current and low
200mV dropout makes them ideal for battery-powered
equipment. They source and sink up to 500µA with only
200mV input voltage headroom, which makes the 2.5V
MAX872 ideal for use with a 3V supply and the 4.096V
MAX874 ideal for use with a 5V supply.
Initial accuracy of 0.2% at +25°C (±5mV for the MAX872,
±8mV for the MAX874) and low 40ppm/°C max drift make
these references suitable for a wide range of precision
applications.
o
Output Voltage
2.500V ±0.2% (MAX872)
4.096V ±0.2% (MAX874)
o
Wide Operating Voltage Range
2.7V to 20V (MAX872)
4.3V to 20V (MAX874)
o
10µA Max Supply Current
o
40ppm/°C Max Drift Over Extended Temp. Range
o
Line Regulation Over Temp.
20µV/V (MAX872)
75µV/V (MAX874)
o
Load Regulation Over Temp.
0.6mV/mA Max (MAX872)
1.0mV/mA Max (MAX874)
Features
MAX872/MAX874
Applications
Hand-Held Instruments
Battery-Operated Equipment
Power Supplies
o
±500µA Sink/Source Current
Ordering Information
PART
MAX872CPA
MAX872CSA
MAX872C/D
MAX872EPA
MAX872ESA
MAX874CPA
MAX874CSA
MAX874C/D
MAX874EPA
MAX874ESA
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
Typical Operating Circuit
3.0V (MAX872)
5.0V (MAX874)
*
Dice are specified at +25°C only.
V
IN
V
OUT
Pin Configuration
TOP VIEW
MAX872
MAX874
TRIM
I.C.
1
V
IN
2
8
7
COMP
I.C.
V
OUT
TRIM
GND
TEMP
3
MAX872
MAX874
6
5
GND
4
REFERENCE WITH TRIMMED OUTPUT
DIP/SO
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
10µA, Low-Dropout,
Precision Voltage References
MAX872/MAX874
ABSOLUTE MAXIMUM RATINGS
Supply Voltage .......................................................................24V
Output Short-Circuit Duration ..........Continuous to Either Supply
C
COMP
Input...........................................................-0.3V to V
OUT
TRIM Input ...................................................-0.3V to (V
IN
+ 0.3V)
TEMP Output ...............................................-0.3V to (V
IN
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C) .............727mW
SO (derate 5.88mW/°C above +70°C) ..........................471mW
Operating Temperature Ranges
MAX87_C__ .........................................................0°C to +70°C
MAX87_E__ ......................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature Range (T
j
) ......................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+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—MAX872
(V
IN
= 2.7V, I
L
= 0mA, T
A
= +25°C, unless otherwise noted.)
PARAMETER
Output Voltage
Output Voltage Noise
Line Regulation
Load Regulation (Note 1)
Quiescent Supply Current
Change in Supply Current vs. V
IN
Short-Circuit Output Current
TEMP Voltage
V
OUT
Adjustment Range
SYMBOL
V
OUT
e
n
V
OUT
/V
IN
V
OUT
/I
OUT
I
Q
I
Q
/V
IN
I
SC
V
TEMP
V
ADJ
V
OUT
≥
V
OUT
+ 0.2V
V
IN
= 2.7V to 20V
V
OUT
short to GND
V
OUT
short to V
IN
0.1Hz to 10Hz
V
IN
= 4.5V to 20V
V
IN
= 2.7V to 5.5V
Sourcing 0mA to 0.5mA
Sinking 0mA to -0.5mA
CONDITIONS
MIN
2.495
TYP
2.500
60
4
80
0.2
4
6.5
0.35
6
3
690
+75/-20 +100/-25
12
250
0.5
12
10
0.55
15
9
MAX
2.505
UNITS
V
µVp-p
µV/V
mV/mA
µA
µA/V
mA
mV
mV
ELECTRICAL CHARACTERISTICS—MAX874
(V
IN
= 4.3V, I
L
= 0mA, T
A
= +25°C, unless otherwise noted.)
PARAMETER
Output Voltage
Output Voltage Noise
Line Regulation
Load Regulation (Note 1)
Quiescent Supply Current
Change in Supply Current vs. V
IN
Short-Circuit Output Current
TEMP Voltage
V
OUT
Adjustment Range
SYMBOL
V
OUT
e
n
V
OUT
/V
IN
V
OUT
/I
OUT
I
Q
I
Q
/V
IN
I
SC
V
TEMP
V
ADJ
V
OUT
≥
V
OUT
+ 0.2V
±150
V
IN
= 4.3V to 20V
V
OUT
short to GND
V
OUT
short to V
IN
0.1Hz to 10Hz
V
IN
= 4.3V to 20V
Sourcing 0mA to 0.5mA
Sinking 0mA to -0.5mA
CONDITIONS
MIN
4.088
TYP
4.096
90
15
0.15
6
6.5
0.35
6
5
690
±200
75
0.9
15
10
0.55
15
25
MAX
4.104
UNITS
V
µVp-p
µV/V
mV/mA
µA
µA/V
mA
mV
mV
2
_______________________________________________________________________________________
10µA, Low-Dropout,
Precision Voltage References
ELECTRICAL CHARACTERISTICS—MAX872C
(V
IN
= 2.7V, I
L
= 0mA, T
A
= 0°C to +70°C, unless otherwise noted.)
PARAMETER
Output Voltage
Output Voltage Temperature
Coefficient
Line Regulation
Load Regulation (Note 1)
Quiescent Supply Current
Change in Supply Current vs. V
IN
V
OUT
Adjustment Range
TEMP Output Temperature
Coefficient
SYMBOL
V
OUT
TCV
OUT
V
OUT
/V
IN
V
OUT
/I
OUT
I
Q
I
Q
/V
IN
V
ADJ
TCV
TEMP
V
IN
= 2.7V to 20V
V
IN
≥
V
OUT
+ 0.2V
+75/-20
2.3
V
IN
= 4.5V to 20V
V
IN
= 2.7V to 5.5V
Sourcing 0mA to 0.4mA
Sinking 0mA to -0.4mA
CONDITIONS
MIN
2.4905
20
TYP
MAX
2.5095
40
20
300
0.6
15
15
0.7
UNITS
V
ppm/°C
µV/V
mV/mA
µA
µA/V
mV
mV/°C
MAX872/MAX874
ELECTRICAL CHARACTERISTICS—MAX874C
(V
IN
= 4.3V, I
L
= 0mA, T
A
= 0°C to +70°C, unless otherwise noted.)
PARAMETER
Output Voltage
Output Voltage Temperature
Coefficient
Line Regulation
Load Regulation (Note 1)
Quiescent Supply Current
Change in Supply Current vs. V
IN
V
OUT
Adjustment Range
TEMP Output Temperature
Coefficient
SYMBOL
V
OUT
TCV
OUT
V
OUT
/V
IN
V
OUT
/I
OUT
I
Q
I
Q
/V
IN
V
ADJ
TCV
TEMP
V
IN
= 4.3V to 20V
V
IN
≥
V
OUT
+ 0.2V
±150
2.3
V
IN
= 4.3V to 20V
Sourcing 0mA to 0.4mA
Sinking 0mA to -0.4mA
CONDITIONS
MIN
4.0805
20
TYP
MAX
4.1115
40
75
1.0
25
15
0.7
UNITS
V
ppm/°C
µV/V
mV/mA
µA
µA/V
mV
mV/°C
Note 1:
If the load current exceeds 300µA, connect a minimum of 1000pF from V
OUT
to GND. Note that if a capacitor larger than
1000pF is used, a compensation capacitor of C
OUT
/100 must be connected from V
OUT
to COMP.
_______________________________________________________________________________________
3
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