MAX874 MAXIM [Maxim Integrated Products], MAX874 Datasheet

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MAX874

Manufacturer Part Number
MAX874
Description
10?A, Low-Dropout, Precision Voltage References
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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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.
19-0005; Rev 2; 6/97
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.
Hand-Held Instruments
Battery-Operated Equipment
Power Supplies
REFERENCE WITH TRIMMED OUTPUT
Typical Operating Circuit
3.0V (MAX872)
5.0V (MAX874)
________________________________________________________________ Maxim Integrated Products
MAX872
MAX874
GND
V
IN
General Description
TRIM
V
OUT
Applications
Precision Voltage References
* Dice are specified at +25°C only.
MAX872CPA
MAX872CSA
MAX872C/D
MAX872EPA
MAX872ESA
MAX874CPA
MAX874CSA
MAX874C/D
MAX874EPA
MAX874ESA
Output Voltage
Wide Operating Voltage Range
10µA Max Supply Current
40ppm/°C Max Drift Over Extended Temp. Range
Line Regulation Over Temp.
Load Regulation Over Temp.
±500µA Sink/Source Current
2.500V ±0.2% (MAX872)
4.096V ±0.2% (MAX874)
2.7V to 20V (MAX872)
4.3V to 20V (MAX874)
20µV/V (MAX872)
75µV/V (MAX874)
0.6mV/mA Max (MAX872)
1.0mV/mA Max (MAX874)
PART
TOP VIEW
10µA, Low-Dropout,
TEMP
GND
I.C.
V
IN
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
1
2
4
3
Ordering Information
DIP/SO
MAX872
MAX874
Pin Configuration
8
7
6
5
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
PIN-PACKAGE
COMP
I.C.
V
TRIM
OUT
Features
1

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MAX874 Summary of contents

Page 1

... 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. ...

Page 2

... Output Voltage Noise Line Regulation Load Regulation (Note 1) V Quiescent Supply Current Change in Supply Current vs Short-Circuit Output Current TEMP Voltage V Adjustment Range OUT ELECTRICAL CHARACTERISTICS—MAX874 (V = 4.3V 0mA +25°C, unless otherwise noted PARAMETER Output Voltage Output Voltage Noise Line Regulation ...

Page 3

... Coefficient Line Regulation Load Regulation (Note 1) Quiescent Supply Current Change in Supply Current vs Adjustment Range OUT TEMP Output Temperature Coefficient ELECTRICAL CHARACTERISTICS—MAX874C (V = 4.3V 0mA 0°C to +70°C, unless otherwise noted PARAMETER Output Voltage Output Voltage Temperature Coefficient ...

Page 4

... Line Regulation Load Regulation V Quiescent Supply Current Change in Supply Current vs Adjustment Range OUT TEMP Output Temperature TCV Coefficient ELECTRICAL CHARACTERISTICS—MAX874E (V = 4.3V 0mA -40°C to +85°C, unless otherwise noted PARAMETER SYMBOL Output Voltage Output Voltage Temperature Coefficient ...

Page 5

... (MAX874), no load DROPOUT VOLTAGE vs. SOURCE CURRENT 250 200 T = +85°C A 150 T = +25°C A 100 -40° 100 150 200 SOURCE CURRENT ( A) MAX874 SUPPLY CURRENT vs. TEMPERATURE 20V 10V -50 - TEMPERATURE (° ...

Page 6

... Low-Dropout, Precision Voltage References ( (MAX872 (MAX874), no load MAX874 OUTPUT VOLTAGE vs. SOURCE CURRENT 4.098 4.097 4.096 4.095 4.094 0.01 0.1 1 SOURCE CURRENT (mA) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY -20 NO LOAD V = +3V TO +5V (MAX872 +5V TO +7V (MAX874 INPUT FILTER -40 INPUT FILTER -60 CIRCUIT IN FIGURE 2 ...

Page 7

... COMP COMP to provide capacitive load compensation. Applications Information Trimming the Output Voltage The MAX872/MAX874’s output voltage is trimmed for 0.2% tolerance at +25°C. If additional V desired, connect a potentiometer to TRIM, as shown in Figures 1a and 1b. Adjusting V OUT ry-trimmed voltage typically changes the output voltage tempco by 7ppm/°C per 100mV. ...

Page 8

... Therefore, when using the MAX872/MAX874 in low- dropout applications, ensure that the power supply has a low source resistance. ...

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