OPA145 Datasheet, PDF (18/40 Pages) Texas Instruments – High-Precision, Low-Noise, Rail-to-Rail Output, 5.5-MHz JFET Operational Amplifiers

OPA145, OPA2145, OPA4145
SBOS427 – JUNE 2017
8 Detailed Description
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8.1 Overview
The OPAx145 family of operational amplifiers is a series of low-power JFET input amplifiers that feature superior
drift performance and low input bias current. The rail-to-rail output swing and input range that includes V– allow
designers to use the low-noise characteristics of JFET amplifiers while also interfacing to modern, single-supply,
precision analog-to-digital converters (ADCs) and digital-to-analog converters (DACs). The OPAx145 series
achieves 5.5-MHz gain-bandwidth product and 20-V/μs slew rate and consumes only 445 µA (typical) of
quiescent current, making it well suited for low-power applications. These devices operate on a single 4.5-V to
36-V supply or dual ±2.25-V to ±18-V supplies.
All versions are fully specified from –40°C to +125°C for use in the most challenging environments. The single-
channel OPA145 is available in the 5-pin SOT-23, 8-pin VSSOP, 8-pin 3-mm × 3-mm WSON, and 8-pin SOIC
packages; the dual-channel OPA2145 is available in 8-pin VSSOP, 8-pin 3-mm × 3-mm WSON, and 8-pin SOIC
packages; and the quad-channel OPA4145 is available in the 16-pin 3-mm × 3-mm QFN, 14-pin SOIC and 14-
pin TSSOP packages.
The Functional Block Diagram shows the simplified diagram of the OPAx145.
8.2 Functional Block Diagram
V+
Pre-Output Driver
IN–
IN+
OUT
V–
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Product Folder Links: OPA145 OPA2145 OPA4145