®
PGA202/203
Digitally Controlled Programmable-Gain
INSTRUMENTATION AMPLIFIER
FEATURES
q
DIGITALLY PROGRAMMABLE GAINS:
DECADE MODEL—PGA202
GAINS OF 1, 10, 100, 1000
BINARY MODEL—PGA203
GAINS OF 1, 2, 4, 8
q
LOW BIAS CURRENT: 50pA max
q
FAST SETTLING: 2
µ
s to 0.01%
q
LOW NON-LINEARITY: 0.012% max
q
HIGH CMRR: 80dB min
q
NEW TRANSCONDUCTANCE CIRCUITRY
q
LOW COST
APPLICATIONS
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DATA ACQUISITION SYSTEMS
q
q
q
q
AUTO-RANGING CIRCUITS
DYNAMIC RANGE EXPANSION
REMOTE INSTRUMENTATION
TEST EQUIPMENT
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.
V
OS
Adjust
6
9
10 Filter B
5.3pF*
30k
Ω
*
Front
End
and
Logic
Circuits
I
1
+V
IN
8
11 Sense
12 V
OUT
4 V
REF
–
+
+V
IN
7
I
2
30k
Ω
*
5.3pF*
*±20%
5 Filter A
1
2 14
A
0
A
1
Digital Common
Covered by U.S. PATENT #4,883,422
International Airport Industrial Park • Mailing Address: PO Box 11400
Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP •
• Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706
Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
®
©
1989 Burr-Brown Corporation
PDS-1006C
1
Printed in U.S.A.
PGA202/203
August, 1993
BURR-BROWN [ BURR-BROWN CORPORATION ]
