ZHCS020J January 2011 – March 2021 OPA2835 , OPA835
PRODUCTION DATA
- 1 特性
- 2 应用
- 3 说明
- 4 Revision History
- 5 Device Comparision Table
- 6 Pin Configuration and Functions
-
7 Specifications
- 7.1 Absolute Maximum Ratings
- 7.2 ESD Ratings
- 7.3 Recommended Operating Conditions
- 7.4 Thermal Information: OPA835
- 7.5 Thermal Information: OPA2835
- 7.6 Electrical Characteristics: VS = 2.7 V
- 7.7 Electrical Characteristics: VS = 5 V
- 7.8 Typical Characteristics: VS = 2.7 V
- 7.9 Typical Characteristics: VS = 5 V
- 8 Detailed Description
-
9 Application and Implementation
- 9.1
Application Information
- 9.1.1 Noninverting Amplifier
- 9.1.2 Inverting Amplifier
- 9.1.3 Instrumentation Amplifier
- 9.1.4 Attenuators
- 9.1.5 Single-Ended to Differential Amplifier
- 9.1.6 Differential to Single-Ended Amplifier
- 9.1.7 Differential-to-Differential Amplifier
- 9.1.8 Gain Setting With OPA835 RUN Integrated Resistors
- 9.1.9 Pulse Application With Single-Supply
- 9.1.10 ADC Driver Performance
- 9.2 Typical Application
- 9.1
Application Information
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
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9.1.1 Noninverting Amplifier
The OPA835 and OPA2835 devices can be used as noninverting amplifiers with signal input to the noninverting input, VIN+. A basic block diagram of the circuit is shown in Figure 8-1.
If VIN = VREF + VSIG, the amplifier output may be calculated according to Equation 1.
The signal gain of the circuit is set
by 
, and VREF provides a reference around which the
input and output signals swing. Output signals are in-phase with the input
signals.
The OPA835 and OPA2835 devices are designed for the nominal value of RF to be 2 kΩ in gains other than +1. This gives excellent distortion performance, maximum bandwidth, best flatness, and best pulse response. RF = 2 kΩ must be used as a default unless other design goals require changing to other values. All test circuits used to collect data for this data sheet had RF = 2 kΩ for all gains other than +1. A gain of +1 is a special case where RF is shorted and RG is left open.