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®
PGA202/203
1
Covered by U.S. PATENT #4,883,422
PGA202/203
®
FEATURES
● DIGITALLY PROGRAMMABLE GAINS:
DECADE MODEL—PGA202
GAINS OF 1, 10, 100, 1000
BINARY MODEL—PGA203
GAINS OF 1, 2, 4, 8
● LOW BIAS CURRENT: 50pA max
● FAST SETTLING: 2
µs to 0.01%
● LOW NON-LINEARITY: 0.012% max
● HIGH CMRR: 80dB min
● NEW TRANSCONDUCTANCE CIRCUITRY
● LOW COST
DESCRIPTION
The PGA202 is a monolithic instrumentation ampli-
fier with digitally controlled gains of 1, 10, 100, and
1000. The PGA203 provides gains of 1, 2, 4, and 8.
Both have TTL or CMOS-compatible inputs for easy
microprocessor interface. Both have FET inputs and a
new transconductance circuitry that keeps the band-
width nearly constant with gain. Gain and offsets are
laser trimmed to allow use without any external com-
ponents. Both amplifiers are available in ceramic or
plastic packages. The ceramic package is specified
over the full industrial temperature range while the
plastic package covers the commercial range.
International Airport Industrial Park • Mailing Address: PO Box 11400 • Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706
Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
APPLICATIONS
● DATA ACQUISITION SYSTEMS
● AUTO-RANGING CIRCUITS
● DYNAMIC RANGE EXPANSION
● REMOTE INSTRUMENTATION
● TEST EQUIPMENT
Digitally Controlled Programmable-Gain
INSTRUMENTATION AMPLIFIER
Front
End
and
Logic
Circuits
I
1
I
2
8
69
114
11
4
10
12
5
Filter B
–
+
2
Adjust
+V
IN
A
0
A
1
Digital Common
Sense
V
OUT
V
REF
5.3pF*
5.3pF*
30k *Ω
*±20%
30k *Ω
V
OS
7
+V
IN
Filter A
©1989 Burr-Brown Corporation PDS-1006C Printed in U.S.A. August, 1993
SBOS002
