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OPA838 1mA, 300MHz Gain Bandwidth, Voltage-Feedback Op Amp
SBOS867D
August 2017 – September 2024
OPA838
PRODMIX
CONTENTS
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OPA838 1mA, 300MHz Gain Bandwidth, Voltage-Feedback Op Amp
1
1
Features
2
Applications
3
Description
4
Device Comparison Table
5
Pin Configuration and Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics VS = 5 V
6.6
Electrical Characteristics VS = 3 V
6.7
Typical Characteristics: VS = 5 V
6.8
Typical Characteristics: VS = 3 V
6.9
Typical Characteristics: Over Supply Range
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Input Common-Mode Voltage Range
7.3.2
Output Voltage Range
7.3.3
Power-Down Operation
7.3.4
Trade-Offs in Selecting The Feedback Resistor Value
7.3.5
Driving Capacitive Loads
7.4
Device Functional Modes
7.4.1
Split-Supply Operation (±1.35 V to ±2.7 V)
7.4.2
Single-Supply Operation (2.7 V to 5.4 V)
7.4.3
Power Shutdown Operation
8
Application and Implementation
8.1
Application Information
8.1.1
Noninverting Amplifier
8.1.2
Inverting Amplifier
8.1.3
Output DC Error Calculations
8.1.4
Output Noise Calculations
8.2
Typical Applications
8.2.1
High-Gain Differential I/O Designs
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.3
Application Curves
8.2.2
Transimpedance Amplifier
8.2.2.1
Design Requirements
8.2.2.2
Detailed Design Procedure
8.2.2.3
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
TINA-TI™ Simulation Software (Free Download)
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
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Data Sheet
OPA838 1mA, 300MHz Gain Bandwidth, Voltage-Feedback Op Amp
1
Features
Gain bandwidth product: 300MHz
Very-low (trimmed) supply current: 950µA
Bandwidth: 90MHz (A
V
= 6V/V)
High full-power bandwidth: 45MHz, 4V
PP
Negative rail input, rail-to-rail output
Single-supply operating range: 2.7V to 5.4V
25°C input offset: ±125µV (maximum)
Input offset voltage drift: < ±1.6µV/°C (maximum)
Input voltage noise: 1.8nV/√Hz (> 200Hz)
Input current noise: 1pA/√Hz (> 2000Hz)
< 1µA shutdown current for power savings
2
Applications
Low-power transimpedance amplifier
Low-noise high-gain stage
12-bit to 16-bit low-power SAR ADC driver
High-gain active filter design
Ultrasonic flow meter