MAX5430 Datasheet, PDF (1/7 Pages) Maxim Integrated Products – +/-15V Digitally Programmable Precision Voltage-Dividers for PGAs

19-2222; Rev 1; 1/02
±15V Digitally Programmable
Precision Voltage-Dividers for PGAs
General Description
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).
Features
o Four Noninverting PGA Gain Configurations:
A_V = 1, 2, 4, and 8
o Precision 0.025% Ratio Accuracy
o On-Chip Matching Resistor for Op Amp Bias-
Current Compensation (MAX5431)
o Single-Supply 12V to 15V, or Dual-Supply ±12V to
±15V Operation
o Low 35µA Supply Current
o CMOS/TTL Logic Compatible 2-Wire Parallel
Interface
o Space-Saving 8-Pin SOT23 and 10-Pin µMAX
Packages
o 3V Logic Compatibility
Applications
General-Purpose Programmable Noninverting
Amplifier
Programmable Instrumentation Amplifier
Ordering Information
PART
TEMP
RANGE
PIN-
GAIN
PACKAGE ACCURACY
MAX5430AEKA -40°C to +85°C 8 SOT23
0.025%
MAX5430BEKA -40°C to +85°C 8 SOT23
0.09%
MAX5430CEKA -40°C to +85°C 8 SOT23
0.5%
MAX5431AEUB -40°C to +85°C 10 µMAX 0.025%
MAX5431BEUB -40°C to +85°C 10 µMAX
0.09%
MAX5431CEUB -40°C to +85°C 10 µMAX
0.5%
Functional Diagram
V_DD
H
MAX5430
MAX5431
W
D0
DECODER
D1
MATCH_H
MATCH_L
MAX5431 ONLY
V_SS GND L
Pin Configurations
TOP VIEW
V_DD 1
MATCH_H 2
GND 3
H4
L5
MAX5431
10 D0
9 D1
8W
7 V_SS
6 MATCH_L
µMAX
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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