OPA2277-EP_16 Datasheet, PDF (1/24 Pages) Texas Instruments – High-Precision, Low-Noise Operational Amplifier

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OPA2277-EP
SBOS700 – DECEMBER 2014
OPA2277-EP High-Precision, Low-Noise Operational Amplifier
1 Features
•1 Ultra-Low Offset Voltage: 10 µV
• High Open-Loop Gain: 134 dB
• High Common-Mode Rejection: 140 dB
• High Power Supply Rejection: 130 dB
• Low Bias Current: 1-nA Maximum
• Wide Supply Range: ±2 to ±18 V
• Low Quiescent Current: 800 µA/Amplifier
• Supports Defense, Aerospace, and Medical
Applications
– Controlled Baseline
– One Assembly and Test Site
– One Fabrication Site
– Available in Military (–55°C to 125°C)
Temperature Range ⁽¹⁾
– Extended Product Life Cycle
– Extended Product-Change Notification
– Product Traceability
2 Applications
• Transducer Amplifier
• Bridge Amplifier
• Temperature Measurements
• Strain Gage Amplifier
• Precision Integrator
• Battery-Powered Instruments
• Test Equipment
(1) Additional temperature ranges available – contact factory
3 Description
The OPA2277 precision operational amplifier
replaces the industry standard OP-177. It offers
improved noise, wider output voltage swing, and is
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.
OPA2277 operates from ±2-V to ±18-V supplies with
excellent performance. Unlike most operational
amplifiers, which are specified at only one supply
voltage, the OPA2277 is specified for real-world
applications; a single limit applies over the ±5-V to
±15-V supply range. High performance is maintained
as the amplifiers swing to their specified limit.
Because the initial offset voltage (±20 μV max) is so
low, user adjustment is usually not required.
OPA2277 is easy to use and free from phase
inversion and overload problems found in some
operational amplifiers. It is stable in unity gain and
provides excellent dynamic behavior over a wide
range of load conditions. OPA2277 features
completely independent circuitry for lowest crosstalk
and freedom from interaction, even when overdriven
or overloaded. Dual versions are available in DIP-8,
SO-8. OPA2277 is fully specified and operates from
–55°C to 125°C.
Device Information⁽¹⁾
ORDER NUMBER
PACKAGE
BODY SIZE (NOM)
OPA2277MDTEP SOIC (8)
3.91 mm × 4.90 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Load Cell Amplifier Schematic
V+
1/2
OPA2277
R–∆R
V₁
Load
Cell
R+∆R
V₂
R+∆R
R–∆R
V–
V+
1/2
OPA2277
V–
R₂
R₁
V_OUT
=
(V₁
– V₂)(1
+
R₂
R₁
)
R₂
R₁
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.