OPA2140AIDR datasheet(15/48 Pages) TI

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7 Detailed Description

7.1 Overview

The OPAx140 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 OPAx140 series

achieves 11-MHz unity-gain bandwidth and 20-V/μs slew rate, and consumes only 1.8 mA (typical) of quiescent

current. These devices operate on a single 4.5-V to 36-V supply or dual ±2.25-V to ±18-V supplies.

Section 7.2 shows the simplified diagram of the OPAx140.

7.2 Functional Block Diagram

IN–

Pre-Output Driver

OUT

IN+

V+

V–

7.3 Feature Description

7.3.1 Operating Voltage

The OPA140, OPA2140, and OPA4140 series of op amps can be used with single or dual supplies from

an operating range of VS = 4.5 V (±2.25 V) and up to VS = 36 V (±18 V). These devices do not require

symmetrical supplies; they only require a minimum supply voltage of 4.5 V (±2.25 V). For VS less than ±3.5 V,

the common-mode input range does not include midsupply. Supply voltages higher than 40 V can permanently

damage the device; see Section 6.1. Key parameters are specified over the operating temperature range, TA =

–40°C to 125°C. Key parameters that vary over the supply voltage or temperature range are shown in Section

6.8 of this data sheet.

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OPA140, OPA2140, OPA4140

SBOS498E – JULY 2010 – REVISED JULY 2021

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OPA2140AIDR Datasheet(PDF) 15 Page - Texas Instruments