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OPA3S328 40-MHz, Dual, Precision, Low-Noise, Low-Input-Bias-Current CMOS Operational Amplifier With Integrated Switches
SBOS937D
October 2020 – December 2023
OPA3S328
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OPA3S328 40-MHz, Dual, Precision, Low-Noise, Low-Input-Bias-Current CMOS Operational Amplifier With Integrated Switches
1
1
Features
2
Applications
3
Description
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
ESD Ratings
5.3
Recommended Operating Conditions
5.4
Thermal Information
5.5
Electrical Characteristics
5.6
Timing Diagram
5.7
Typical Characteristics
6
Parameter Measurement Information
6.1
Switch Characterization Configurations
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Low Operating Voltage
7.3.2
Input and ESD Protection
7.3.3
Programmable Switches
7.3.4
Rail-to-Rail Input
7.3.5
Phase Reversal
7.4
Device Functional Modes
7.4.1
Power-Down Mode
8
Application and Implementation
8.1
Application Information
8.1.1
Capacitive Load and Stability
8.1.2
EMI Susceptibility and Input Filtering
8.1.3
Transimpedance Amplifier
8.1.3.1
Optimizing the Transimpedance Circuit
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.3
Application Curve
8.3
Power Supply Recommendations
8.4
Layout
8.4.1
Layout Guidelines
8.4.2
Layout Example
9
Device and Documentation Support
9.1
Device Support
9.1.1
Development Support
9.1.1.1
PSpice® for TI
9.1.1.2
TINA-TI™ Simulation Software (Free Download)
9.1.1.3
TI Reference Designs
9.1.1.4
Filter Design Tool
9.2
Documentation Support
9.2.1
Related Documentation
9.3
Receiving Notification of Documentation Updates
9.4
Support Resources
9.5
Trademarks
9.6
Electrostatic Discharge Caution
9.7
Glossary
10
Revision History
11
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
RGR|20
MPQF239A
YBJ|24
MXBG459
Thermal pad, mechanical data (Package|Pins)
RGR|20
QFND242E
Orderable Information
sbos937d_oa
sbos937d_pm
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Data Sheet
OPA3S328 40-MHz, Dual, Precision, Low-Noise, Low-Input-Bias-Current CMOS Operational Amplifier With Integrated Switches
1
Features
Precision operational amplifier with integrated switches for transimpedance applications
Wide bandwidth: 40 MHz
Low offset voltage: 60 µV (max)
Very low offset drift: 1 µV/°C (max)
Low input bias current: 0.2 pA
Rail-to-rail input and output
Zero-crossover input stage
Low voltage noise: 6.1 nV/√
Hz
at 10 kHz
Low current noise: 0.125 pA/√
Hz
at 10 kHz
Low leakage switches: 10 pA
Slew rate: 30 V/µs
Quiescent current: 3.8 mA per channel
Current in shutdown mode: 30 µA
Output impedance in shutdown mode: 100 GΩ
Single-supply voltage range: 2.2 V to 5.5 V
Unity-gain stable
Small packages:
20-lead, 3.5-mm x 3.5-mm VQFN
2.0-mm x 2.0-mm DSBGA
2
Applications
Optical transport inter-dc interconnect
Optical module
Optical network terminal unit (ONT)
Small cell base station
Digital multimeter (DMM)
Data acquisition (DAQ)