Datasheet

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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).

Applications

General-Purpose Programmable Noninverting

Amplifier

Programmable Instrumentation Amplifier

Features

♦ Four Noninverting PGA Gain Configurations:

= 1, 2, 4, and 8

♦ Precision 0.025% Ratio Accuracy

♦ On-Chip Matching Resistor for Op Amp Bias-

Current Compensation (MAX5431)

♦ Single-Supply +12V to +15V, or Dual-Supply ±12V

to ±15V Operation

♦ Low 35µA Supply Current

♦ CMOS/TTL Logic Compatible 2-Wire Parallel

Interface

♦ Space-Saving 8-Pin SOT23 and 10-Pin µMAX

Packages

♦ +3V Logic Compatibility

MAX5430/MAX5431

±15V Digitally Programmable

Precision Voltage-Dividers for PGAs

________________________________________________________________ Maxim Integrated Products 1

GND

MATCH_L

MATCH_H

MAX5431

µMAX

TOP VIEW

Pin Configurations

Ordering Information

DECODER

MATCH_H

MATCH_L

MAX5431 ONLY

GND

MAX5430

MAX5431

Functional Diagram

19-2222; Rev 2; 7/05

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.

PART

TEMP

RANGE

PIN-

PACKAGE

GAIN

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%

Pin Configurations continued at end of data sheet.

µMax is a registered trademark of Maxim Integrated Products, Inc.

Summary of content (7 pages)

PAGE 1
9-2222; Rev 2; 7/05 ±15V Digitally Programmable Precision Voltage-Dividers for PGAs 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 resistor-dividers.
PAGE 2
MAX5430/MAX5431 ±15V Digitally Programmable Precision Voltage-Dividers for PGAs ABSOLUTE MAXIMUM RATINGS VDD to GND ............................................................-0.3V to +17V VSS to GND.............................................................-17V to +0.3V D0, D1 to GND .........................................................-0.3V to +6V H, L, W, MATCH_ to GND ................(VSS - 0.3V) to (VDD + 0.3V) Current Into Any Signal Pin...............................................
PAGE 3
±15V Digitally Programmable Precision Voltage-Dividers for PGAs MAX543_A DIVIDER RATIO ACCURACY vs. TEMPERATURE (RATIO = 2) 0.0005 0 -0.0005 -0.0010 0.004 0.002 0 -0.002 -0.004 -0.006 -0.0015 -0.008 -0.0020 -0.010 20 35 50 65 MAX543_A DIVIDER RATIO ACCURACY vs. TEMPERATURE (RATIO = 8) 20 35 50 65 0.004 0.002 0 -0.002 -0.004 -0.006 0.0015 65 0.0005 0 -0.0005 -0.0010 -25 -10 0.006 0.004 0.002 0 -0.002 -0.004 -0.006 20 35 50 65 MAX5430 toc03 0 -0.005 -0.010 0.004 0.002 0 -0.002 -0.
PAGE 4
Typical Operating Characteristics (continued) (VDD = +15V, VSS = -15V or VSS = GND, VH = 5V, VL =-5V, TA = 25°C, unless otherwise noted.) (Note 3) 0.002 0 RATIO 8 -0.002 RATIO 1 -0.004 -0.006 -0.008 RATIO 2 0.006 0.004 RATIO 1 0.002 RATIO 4 0 -0.002 -0.004 RATIO 8 -0.006 12 13 14 15 0.006 RATIO 4 0.004 0.002 0 -0.002 RATIO 8 RATIO 1 -0.004 -0.006 -0.010 -0.010 11 RATIO 2 -0.008 -0.008 -0.010 VL = 0 0.
PAGE 5
±15V Digitally Programmable Precision Voltage-Dividers for PGAs PIN NAME MAX5431 FUNCTION MAX5430 1 8 VDD 2 — MATCH_H Positive Power Supply 3 7 GND 4 6 H High Terminal of Resistive-Divider 5 5 L Low Terminal of Resistive-Divider 6 — MATCH_L Matching Resistor Low Terminal 7 4 VSS 8 3 W Wiper Terminal of Resistive-Divider Matching Resistor High Terminal Ground Negative Power Supply 9 2 D1 Second Bit Digital Input (MSB) (Table 1) 10 1 D0 First Bit Digital Input (LSB) (T
PAGE 6
MAX5430/MAX5431 ±15V Digitally Programmable Precision Voltage-Dividers for PGAs Digital Interface Operation The MAX5430/MAX5431 feature a simple two-bit parallel programming interface. D1 and D0 program the gain setting according to the Logic-Control Truth Table (see Table 1). The digital interface is CMOS/TTL logic compatible. Applications Information 15V VIN VOUT 15V VDD Programmable-Gain Amplifier The MAX5430/MAX5431 are ideally suited for high-precision PGA applications.
PAGE 7
±15V Digitally Programmable Precision Voltage-Dividers for PGAs CL CL E MIN MAX A A1 A2 0.90 0.00 0.90 1.45 0.15 1.30 b 0.28 0.45 C D E 0.09 2.80 2.60 0.20 3.00 3.00 SYMBOL CL E1 E1 1.50 L 0.30 L2 e PIN 1 I.D. DOT (SEE NOTE 6) SOT23, 8L .EPS SEE DETAIL "A" e b 1.75 0.60 0.25 BSC. 0.65 BSC. 1.95 REF. 0∞ 8∞ e1 0 e1 D C CL L2 A2 A GAUGE PLANE A1 SEATING PLANE C 0 L NOTE: 1. ALL DIMENSIONS ARE IN MILLIMETERS. 2.