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MAX5420 Datasheet

  • MAX5420

  • Digitally Programmable Precision Voltage Divider for PGAs

  • Maxim   Maxim

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19-2229; Rev 0; 10/01
Digitally Programmable Precision
Voltage Divider for PGAs
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 鹵5V
supply, and consume only 3碌A(chǔ) 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 碌MAX packages. The devices are specified over
the extended temperature range (-40擄C to +85擄C).
Features
o
Four Precision Divider Ratios For Noninverting
Gains of 1, 2, 4, and 8 in PGAs
o
0.025%, 0.09%, or 0.5% Ratio Accuracy
Guaranteed Over -40擄C to +85擄C
o
On-Chip Matching Resistor for Op Amp Bias-
Current Compensation (MAX5421)
o
5V Single or 鹵5V Dual Supply Operation
o
Low 3碌A(chǔ) Supply Current
o
CMOS/TTL Logic Compatible 2-Wire Parallel
Interface
o
Small 8-Pin and 10-Pin 碌MAX Packages
MAX5420/MAX5421
Applications
General-Purpose Programmable Noninverting
Amplifiers
Programmable Instrumentation Amplifiers
Ordering Information
PART
TEMP.
RANGE
-40擄C to +85擄C
PIN-
PACKAGE
8 碌MAX
8 碌MAX
8 碌MAX
10 碌MAX
10 碌MAX
10 碌MAX
GAIN
ACCURACY
0.025%
0.09%
0.5%
0.025%
0.09%
0.5%
MAX5420AEUA
-40擄C to +85擄C
MAX5420BEUA
MAX5420CEUA -40擄C to +85擄C
MAX5421AEUB
-40擄C to +85擄C
MAX5421BEUB
-40擄C to +85擄C
MAX5421CEUB -40擄C to +85擄C
Functional Diagram
TOP VIEW
V
DD
1
Pin Configurations
8
7
H
W
L
D1
V
DD
MAX5420
MAX5421
D0
DECODER
D1
MATCH_H
MATCH_L
H
V
SS
2
GND
3
MAX5420
6
5
W
D0
4
碌MAX-8
V
DD
1
10
H
9
W
L
MATCH_H
MATCH_L
V
SS
GND L
MAX5421 ONLY
V
SS
GND
D0
D1
2
3
4
5
MAX5421
8
7
6
碌MAX-10
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.

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