MAX5426A MAXIM [Maxim Integrated Products], MAX5426A Datasheet

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MAX5426A

Manufacturer Part Number
MAX5426A
Description
Precision Resistor Network for Programmable Instrumentation Amplifiers
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet
The MAX5426 is a precision resistor network optimized
for use with programmable instrumentation amplifiers.
The MAX5426 operates from dual ±5V to ±15V supplies
and consumes less than 40µA of supply current.
Designed to be used in the traditional three op amp
instrumentation amplifier topology, this device provides
noninverting gains of 1, 2, 4, and 8 that are accurate to
0.025% (A-grade), 0.09% (B-grade), or 0.5%
(C-grade) over the extended temperature range (-40°C
to +85°C). The MAX5426 is available in the 6.4mm
5mm 14-pin TSSOP package.
19-2318; Rev 0; 1/02
Pin Configuration and Functional Diagram appear at
end of data sheet.
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.
General-Purpose Programmable Instrumentation
Amplifiers
Gain Control in RF Power Amplifiers
Precision Dual Attenuator
Programmable Instrumentation Amplifiers
V
V
CM
D0
D1
IN-
IN+
________________________________________________________________ Maxim Integrated Products
General Description
V
V
DD
SS
GND
Applications
Precision Resistor Network for
FB2
FB1
MAX5426
o Differential Gains: A
o Gain Accurate to 0.025%, 0.09%, or 0.5%
o Dual Supply ±5V to ±15V Operation
o Low 36µA Supply Current
o Simple CMOS/TTL Logic Compatible 2-Wire
o Space-Saving 14-Pin TSSOP Package
o OFFSET Pin Available to Offset the Output of the
OUT2
OUT1
MAX5426AEUD
MAX5426BEUD
MAX5426CEUD
Parallel Interface
(6.4mm
Differential Amplifier
PART
5mm)
INDIF-
INDIF+
Typical Operating Circuit
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
RANGE
Ordering Information
TEMP
V
OUT
OFFSET
= 1, 2, 4, 8
PIN-
PACKAGE
14 TSSOP
14 TSSOP
14 TSSOP
Features
V
OUT
0.025%
0.09%
GAIN
0.5%
1

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MAX5426A Summary of contents

Page 1

... Dual Supply ±5V to ±15V Operation o Low 36µA Supply Current o Simple CMOS/TTL Logic Compatible 2-Wire Parallel Interface o Space-Saving 14-Pin TSSOP Package ✕ (6.4mm o OFFSET Pin Available to Offset the Output of the Differential Amplifier Applications PART MAX5426AEUD MAX5426BEUD MAX5426CEUD FB1 OUT1 MAX5426 FB2 OUT2 Features = ✕ ...

Page 2

... TSSOP (derate 9.1mW/°C above +70°C) ..........727mW - 0.3V 0.2V) Operating Temperature Range ...........................-40°C to +85°C DD Junction Temperature ......................................................+150°C Storage Temperature Range .............................-60°C to +150° unless otherwise noted. Typical values are at T MIN MAX CONDITIONS MAX5426A MAX5426B MAX5426C ANALOG Gain = 1 Gain = 2 Gain = 4 Gain = ...

Page 3

Programmable Instrumentation Amplifiers ELECTRICAL CHARACTERISTICS (continued +15V -15V, GND = PARAMETER Resistance Between FB1 and FB2 R (Note 3) Resistance Between OUT2 and R FB2 Input Impedance at FB1 Input Impedance ...

Page 4

... POSITIVE SUPPLY VOLTAGE (V) POSITIVE SUPPLY CURRENT vs. POSITIVE SUPPLY VOLTAGE POSITIVE SUPPLY VOLTAGE (V) MAX5426A GAIN ACCURACY vs. NEGATIVE SUPPLY VOLTAGE 0.020 0.015 0.010 0.005 0 GAIN 4 GAIN 1 -0.005 -0.010 GAIN 2 GAIN 8 -0.015 -0.020 -15 -13 - NEGATIVE SUPPLY VOLTAGE (V) POSITIVE SUPPLY CURRENT vs ...

Page 5

... Operationally, this device consists of fixed resistors and digitally controlled variable resistors that provide differential gains and 8 (see Functional Diagram). The MAX5426 provides gains accurate to 0.025% (MAX5426A), 0.09% (MAX5426B) or 0.5% (MAX5426C). The MAX5426 is ideal for programmable instrumenta- tion amplifiers. An offset pin is available to apply a DC offset voltage to the output of the differential amplifier ...

Page 6

Precision Resistor Network for Programmable Instrumentation Amplifiers V IN GND SS V IN+ Figure 1. Programmable Instrumentation Amplifier Using MAX5426 Applications Information The MAX5426 is ideal for programmable instrumentation amplifier applications. The typical application ...

Page 7

Programmable Instrumentation Amplifiers TO RIGHT CHANNEL AMPLIFIER GND TO LEFT CHANNEL AMPLIFIER Figure 2. Stereo Audio-Taper Attenuator OUT1 FB1 FB2 OUT2 D1, D0 CASE 1: DIFFERENTIAL INPUT IS CHANGED, WHILE D1 ...

Page 8

Precision Resistor Network for Programmable Instrumentation Amplifiers GND V Pin Configuration TOP VIEW GND MAX5426 FB2 4 OUT2 5 OFFSET 6 INDIF _______________________________________________________________________________________ FB1 DD OUT1 FB2 ...

Page 9

Programmable Instrumentation Amplifiers 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 at ...

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