OPA2325 Datasheet, PDF (17/32 Pages) Texas Instruments – Precision, 10-MHz, Low-Noise, Low-Power, RRIO, CMOS Operational Amplifier

www.ti.com
8 Application and Implementation
OPA2325
SBOS637 – OCTOBER 2016
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
The OPA2325 is an e-trim™ operational amplifier built via a proprietary technique in which offset voltage is
adjusted during the final steps of manufacturing. As a result, the OPA2325 delivers excellent offset voltage
(40 μV, typical). Additionally, the amplifier boasts a fast slew rate, low drift, low noise, and excellent PSRR and
A_OL. The OPA2325 also features a linear input stage with zero-crossover distortion, resulting in excellent CMRR
over the entire input range, which extends from 100 mV below the negative rail to 100 mV above the positive rail.
8.1.1 Operating Characteristics
The OPA2325 family of amplifiers has parameters that are fully specified from 2.2 V to 5.5 V (±1.1 V to ±2.75 V).
Many of the specifications apply from –40°C to +125°C. Parameters that can exhibit significant variance with
regard to operating voltage or temperature are presented in the Typical Characteristics section.
8.1.2 Basic Amplifier Configurations
The OPA2325 is unity-gain stable. The device does not exhibit output phase inversion when the input is
overdriven. A typical single-supply connection is shown in Figure 44. The OPA2325 is configured as a basic
inverting amplifier with a gain of –10 V/V. This single-supply connection has an output centered on the common-
mode voltage, V_CM. For the circuit shown, this voltage is 2.5 V, but can be any value within the common-mode
input voltage range.
R₂
10 kW
5V
R₁
1 kW
V_IN
C₁
100 nF
OPA2325
V_OUT
V_CM = 2.5 V
Copyright © 2016, Texas Instruments Incorporated
Figure 44. Basic Single-Supply Connection
Copyright © 2016, Texas Instruments Incorporated
Product Folder Links: OPA2325
Submit Documentation Feedback
17