MAX5430 MAXIM [Maxim Integrated Products], MAX5430 Datasheet

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MAX5430

Manufacturer Part Number
MAX5430
Description
+/-15V Digitally Programmable Precision Voltage-Dividers for PGAs
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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The MAX5430/MAX5431 are digitally programmable
high-precision resistor arrays for PGAs. The MAX5430/
MAX5431 operate from a single 15V supply or dual
±15V supplies, and consume only 35µA supply current.
These devices are intended for programmable-gain
amplifier (PGA) applications and consist of fixed resis-
tor-dividers. Each device has digitally controlled con-
tacts with four precision noninverting gains of 1, 2, 4,
and 8 with ratio accuracy of 0.025% (MAX5430A/
MAX5431A), 0.09% (MAX5430B/MAX5431B), or 0.5%
(MAX5430C/MAX5431C). The MAX5431 includes an
on-chip matching resistor for op amp input bias-current
compensation.
The MAX5430/MAX5431 are available in space-saving
8-pin SOT23 and 10-pin µMAX packages, and speci-
fied over the extended temperature range of (-40°C to
+85°C).
19-2222; Rev 1; 1/02
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.
MATCH_H
MATCH_L
General-Purpose Programmable Noninverting
Amplifier
Programmable Instrumentation Amplifier
D0
D1
MAX5431 ONLY
MAX5430
MAX5431
DECODER
________________________________________________________________ Maxim Integrated Products
V
DD
General Description
Functional Diagram
V
SS
GND
Precision Voltage-Dividers for PGAs
H
L
Applications
±15V Digitally Programmable
W
o Four Noninverting PGA Gain Configurations:
o Precision 0.025% Ratio Accuracy
o On-Chip Matching Resistor for Op Amp Bias-
o Single-Supply 12V to 15V, or Dual-Supply ±12V to
o Low 35µA Supply Current
o CMOS/TTL Logic Compatible 2-Wire Parallel
o Space-Saving 8-Pin SOT23 and 10-Pin µMAX
o 3V Logic Compatibility
Pin Configurations continued at end of data sheet.
Current Compensation (MAX5431)
±15V Operation
Interface
Packages
MAX5430AEKA -40°C to +85°C 8 SOT23
MAX5431AEUB -40°C to +85°C 10 µMAX
MAX5431CEUB -40°C to +85°C 10 µMAX
MAX5430CEKA -40°C to +85°C 8 SOT23
MAX5431BEUB -40°C to +85°C 10 µMAX
MAX5430BEKA -40°C to +85°C 8 SOT23
A
PART
V
= 1, 2, 4, and 8
TOP VIEW
MATCH_H
GND
V
DD
H
L
1
2
3
4
5
RANGE
TEMP
Ordering Information
MAX5431
µMAX
Pin Configurations
PACKAGE
PIN-
10
9
8
7
6
D0
D1
W
V
MATCH_L
SS
Features
ACCURACY
0.025%
0.025%
0.09%
0.09%
0.5%
0.5%
GAIN
1

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MAX5430 Summary of contents

Page 1

... Each device has digitally controlled con- tacts with four precision noninverting gains and 8 with ratio accuracy of 0.025% (MAX5430A/ MAX5431A), 0.09% (MAX5430B/MAX5431B), or 0.5% (MAX5430C/MAX5431C). The MAX5431 includes an on-chip matching resistor for op amp input bias-current compensation ...

Page 2

Digitally Programmable Precision Voltage-Dividers for PGAs ABSOLUTE MAXIMUM RATINGS V to GND ............................................................-0.3V to +17V GND.............................................................-17V to +0. GND .........................................................-0. MATCH_ to GND ................(V SS Current Into ...

Page 3

Precision Voltage-Dividers for PGAs (V = +15V -15V GND MAX543_A DIVIDER RATIO ACCURACY vs. TEMPERATURE (RATIO = 1) 0.0020 0.0015 0.0010 0.0005 0 -0.0005 -0.0010 -0.0015 -0.0020 -40 -25 -10 5 ...

Page 4

Digitally Programmable Precision Voltage-Dividers for PGAs (V = +15V -15V GND MAX543_B DIVIDER RATIO ACCURACY vs. POSITIVE SUPPLY (V = -15V) SS 0.010 0.008 RATIO 2 0.006 RATIO 4 0.004 ...

Page 5

... R L Figure 1. Simplified Functional Diagram Detailed Description The MAX5430/MAX5431 are digitally programmable pre- cision resistor arrays. These devices have fixed resistor- dividers with digitally controlled contacts, providing four precision noninverting gains and 8 for PGA applications (see Functional Diagram and Figure 1). The MAX5430/MAX5431 achieve ratio accuracies of 0 ...

Page 6

... PGA applications. The typical application circuit of Figure 2 uses the MAX5431 with matching resistor to compensate for voltage offset due to op amp input bias currents. Use the MAX5430 with an ultra-low input bias current op amp (see Figure 3). Power Supplies and Bypassing The MAX5430/MAX5431 operate from dual ±15V sup- plies or a single 15V supply ...

Page 7

Precision Voltage-Dividers for PGAs Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice ...

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