High Precision
OPERATIONAL AMPLIFIERS
OPA277
OPA2277
OPA4277
SBOS079A – MARCH 1999 – REVISED APRIL 2005
www.ti.com
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 1999-2005, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
DESCRIPTION
The OPA277 series precision op amps replace the industry
standard OP-177. They offer improved noise, wider output
voltage swing, and are twice as fast with half the quiescent
current. Features include ultra low offset voltage and drift, low
bias current, high common-mode rejection, and high power
supply rejection. Single, dual, and quad versions have identical
specifications for maximum design flexibility.
OPA277 series op amps operate from
±
2V to
±
18V supplies with
excellent performance. Unlike most op amps which are specified
at only one supply voltage, the OPA277 series is specified for
real-world applications; a single limit applies over the
±
5V to
±
15V supply range. High performance is maintained as the
amplifiers swing to their specified limits. Because the initial offset
voltage (
±
20
µ
V max) is so low, user adjustment is usually not
required. However, the single version (OPA277) provides exter-
nal trim pins for special applications.
OPA277 op amps are easy to use and free from phase inversion
and overload problems found in some other op amps. They are
stable in unity gain and provide excellent dynamic behavior over
a wide range of load conditions. Dual and quad versions feature
completely independent circuitry for lowest crosstalk and free-
dom from interaction, even when overdriven or overloaded.
Single (OPA277) and dual (OPA2277) versions are available
in DIP-8, SO-8, and DFN-8 (4mm x 4mm) packages. The quad
(OPA4277) comes in DIP-14 and SO-14 surface-mount pack-
ages. All are fully specified from –40
°
C to +85
°
C and operate
from –55
°
C to +125
°
C.
FEATURES
●
ULTRA LOW OFFSET VOLTAGE: 10
µ
V
●
ULTRA LOW DRIFT:
±
0.1
µ
V/
°
C
●
HIGH OPEN-LOOP GAIN: 134dB
●
HIGH COMMON-MODE REJECTION: 140dB
●
HIGH POWER SUPPLY REJECTION: 130dB
●
LOW BIAS CURRENT: 1nA max
●
WIDE SUPPLY RANGE:
±
2V to
±
18V
●
LOW QUIESCENT CURRENT: 800
µ
A/amplifier
●
SINGLE, DUAL, AND QUAD VERSIONS
●
REPLACES OP-07, OP-77, OP-177
1
2
3
4
5
6
7
14
13
12
11
10
9
8
Out D
–In D
+In D
V–
+In C
–In C
Out C
Out A
–In A
+In A
V+
+In B
–In B
Out B
OPA4277
14-Pin DIP, SO-14
A
D
B
C
1
2
3
4
8
7
6
5
V+
Out B
–In B
+In B
Out A
–In A
+In A
V–
OPA2277
8-Pin DIP, SO-8
A
B
APPLICATIONS
●
TRANSDUCER AMPLIFIER
●
BRIDGE AMPLIFIER
●
TEMPERATURE MEASUREMENTS
●
STRAIN GAGE AMPLIFIER
●
PRECISION INTEGRATOR
●
BATTERY POWERED INSTRUMENTS
●
TEST EQUIPMENT
1
2
3
4
8
7
6
5
Offset Trim
V+
Output
NC
Offset Trim
–In
+In
V–
OPA277
8-Pin DIP, SO-8
1
2
3
4
Offset Trim
−
In
+In
V
−
8
7
6
5
Offset Trim
Pin 1
Indicator
OPA277AIDRM
DFN-8 4mm x 4mm
(top view)
V+
Output
Thermal Pad
on Bottom
(Connect to V
−
)
NC
1
2
3
4
Out A
−
In A
+In A
V
−
8
7
6
5
Out B
Pin 1
Indicator
OPA2277AIDRM
DFN-8 4mm x 4mm
(top view)
V+
−
In B
Thermal Pad
on Bottom
(Connect to V
−
)
+In B
OPA2
77
OPA2
277
OPA277
OPA2277
OPA42
77
OPA4277
OPA2
277
OPA2
77
NC = No connection.
