MAX5420BEUA+T Datasheet MAX5421CEUB+, MAX5421AEUB+T, MAX5420CEUA+T | P1-P3

General Description

The MAX5420 and MAX5421 are digitally programmable

precision voltage dividers optimized for use in digitally pro-

grammable gain amplifier configurations. The MAX5420/

MAX5421 operate from a single +5V supply or dual ±5V

supply, and consume only 3µA supply current. These

devices consist of a digitally selectable resistor array that

provides four precision noninverting gains of 1, 2, 4, and 8

for PGAs. The MAX5420 and MAX5421 achieve a resistor

ratio accuracy of 0.025% (MAX542_A), 0.09% (MAX542_B),

and 0.5% (MAX542_C). The MAX5421 includes an on-chip

matching resistor for op amp bias-current compensation.

The MAX5420 and MAX5421 are available in 8-pin and

10-pin µMAX packages. The devices are specified over

the extended temperature range (-40°C to +85°C).

Applications

General-Purpose Programmable Noninverting

Amplifiers

Programmable Instrumentation Amplifiers

Features

♦ Four Precision Divider Ratios For Noninverting

Gains of 1, 2, 4, and 8 in PGAs

♦ 0.025%, 0.09%, or 0.5% Ratio Accuracy

Guaranteed Over -40°C to +85°C

♦ On-Chip Matching Resistor for Op Amp Bias-

Current Compensation (MAX5421)

♦ 5V Single or ±5V Dual Supply Operation

♦ Low 3µA Supply Current

♦ CMOS/TTL Logic Compatible 2-Wire Parallel

Interface

♦ Small 8-Pin and 10-Pin µMAX Packages

MAX5420/MAX5421

Digitally Programmable Precision

Voltage Divider for PGAs

________________________________________________________________ Maxim Integrated Products 1

D1D0

GND

µMAX-8

TOP VIEW

MAX5420

MATCH_HD0

GND

MAX5421

µMAX-10

MATCH_LD1

Pin Configurations

Ordering Information

Functional Diagram

19-2230; Rev 2; 2/05

PART

TEMP.

RANGE

PIN-

PACKAGE

GAIN

ACCURACY

MAX5420AEUA -40°C to +85°C 8 µMAX 0.025%

MAX5420BEUA -40°C to +85°C 8 µMAX 0.09%

MAX5420CEUA -40°C to +85°C 8 µMAX 0.5%

MAX5421AEUB -40°C to +85°C 10 µMAX 0.025%

MAX5421BEUB -40°C to +85°C 10 µMAX 0.09%

MAX5421CEUB -40°C to +85°C 10 µMAX 0.5%

DECODER

MATCH_H

MATCH_L

MAX5421 ONLY

GND

MAX5420

MAX5421

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.

MAX5420/MAX5421

Digitally Programmable Precision

Voltage Divider for PGAs

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

= +5V ±5%, V

= -5V ±5% or V

= GND, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°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.

to GND..............................................................-0.3V to +6V

to GND...............................................................+0.3V to -6V

D0, D1 to GND ...........................................-0.3V to (V

+ 0.3V)

H, L, W, MATCH_ to GND ................(V

- 0.3V) to (V

+ 0.3V)

Input and Output Latchup Immunity.................................±50mA

Continuous Power Dissipation (T

= +70°C)

8-Pin µMAX (derate 4.1mW/°C above +70°C) .............333mW

10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-60°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MAX542_A ±0.025

MAX542_B ±0.09

Divider Ratio Accuracy

MAX542_C ±0.5

H-to-L Resistance R

(Figure 1) 15 kΩ

Input Resistance at H R

kΩ

= -5V 300

Ratio = 1

= 0 500

Ω

Input Resistance at W R

Ratio = 2, 4, 8 8 kΩ

Capacitance at H, L, W,

MATCH_H, MATCH_L

ANALOG

5pF

= -5V 300

Ratio = 1

= 0 500

Ω

Matching Resistor MAX5421

Ratio = 2, 4, 8 8 kΩ

DYNAMIC PERFORMANCE

Switching Time t

D D

= + 5V , V

S S

= - 5V , d i g i tal i np ut 0 to + 3V ,

settl es to 0.02% of fi nal val ue w i th 2p F

cap aci ti ve l oad . C i r cui t of Fi g ur e 2.

0.5 µs

DIGITAL INPUTS

Input High Voltage V

2.4

Input Low Voltage V

0.8

Input Leakage Current D1, D0 = V

or GND ±1 µA

Input Capacitance 5pF

MAX5420/MAX5421

Digitally Programmable Precision

Voltage Divider for PGAs

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

= +5V ±5%, V

= -5V ±5% or V

= GND, T

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at T

= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

POWER SUPPLIES

Positive Supply Voltage V

4.75 5.25

Negative Supply Voltage V

0 -5.25

D1, D0 = V

or GND 3 7

Positive Supply Current I

D1, D0 = 3V 15 25

µA

D1, D0 = V

or GND 3 7

Negative Supply Current I

D1, D0 = 3V 15 25

µA

W, H, L, MATCH_L, MATCH_H

Voltage Range

Typical Operating Characteristics

= +5V, V

= -5V, or V

= GND, T

= +25°C, unless otherwise noted.) (Note 1)

0.0001

0.0004

0.0007

0.0010

MAX542_A DIVIDER RATIO ACCURACY

vs. TEMPERATURE

MAX5420/21 toc01

TEMPERATURE (

RATIO ACCURACY (%)

-40

-15 10 35 60

= +5V

= -5V

RATIO = 1

0.0030

0.0034

0.0042

0.0038

0.0046

0.0050

-40 10-15 35 60 85

MAX542_A DIVIDER RATIO ACCURACY

vs. TEMPERATURE

MAX5420/21 toc02

TEMPERATURE (°C)

RATIO ACCURACY (%)

= +5V

= -5V

RATIO = 2

0.001

0.003

0.002

0.004

0.005

-40 10-15 35 60 85

MAX542_A DIVIDER RATIO ACCURACY

vs. TEMPERATURE

MAX5420/21 toc03

TEMPERATURE (

RATIO ACCURACY (%)

= +5V

= -5V

RATIO = 4

P1-P3 P4-P6 P7-P9

MAX5420BEUA+T

Mfr. #:

Buy MAX5420BEUA+T

Manufacturer:

Maxim Integrated

Description:

Digital Potentiometer ICs Precision Voltage Divider for PGAs

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MAX5420BEUA+T

MAX5420BEUA+T

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