Texas Instruments: DEM-OPA-SOT-1A Demonstration Fixture for SOT-23 Operational Ampliers

e14 Contributor — Wed, 25 Jun 2014 00:53:01 GMT

Current Revision posted to Documents by e14 Contributor on 6/25/2014 12:53:01 AM

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Kit Overview

The DEM-OPA-SOT-1ADEM-OPA-SOT-1A is a free demonstration fixture that helps designers to evaluate the operation and performance of TI's High Speed, Wide Bandwidth Operational Amplifiers. This unpopulated PC board is compatible with products offered in the SOT(DBV) package.

Only a few components are necessary to be assembled onto the board to set up the operational amplifier in either an inverting or noninverting configuration. In order to avoid parasitic component inductance the board only accepts surface mount resistors and capacitors.

The actual values of the components, especially the resistors, depend on the type of operational amplifier used and the intended mode of operation. The board was designed to accommodate a variety of amplifiers: voltage feedback types or current feedback types.

Furthermore, the evaluation board not only handles op amps in the existing 5-lead SOT-23 package but also the evaluation platform for 6-lead SOT-23 package. Therefore, the layout includes a sixth pad for the IC (U1) located on the opposite side of pad 2. The sixth lead may be an optional function pin for those amplifiers featuring a disable function.

Note: As a reminder, the frequency response performance of a current feedback amplifier is determined by the feedback resistor value. Also note that the feedback resistor compensates for the package parasitics, and therefore its value usually varies for different packages.

Key Applications: Demonstration fixture for SOT(DBV) package opamps

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Technical Documents

Learning Center

Type	Description
User Guide	TI: User Guide for DEM-OPA-SOT-1A Demonstration Fixture (Rev B)
Datasheet	TI: Data Sheet for OPA656 - Wideband, Unity-Gain Stable, FET-Input OPERATIONAL AMPLIFIER
Datasheet	TI: Data Sheet for OPA657 - 1.6GHz, Low-Noise, FET-Input OPERATIONAL AMPLIFIER
Application Note	TI: Application Note for Transimpedance Considerations for High-Speed Amplifiers
Application Note	TI: Application Note for Wideband Complementary Current Output DAC to Single-Ended Interface: Improved Matching for the Gain and Compliance Voltage Swing
Application Note	TI: Application Note for HIGH SPEED DATA CONVERSION

Video

Video1	Video2	Video3
www.youtube.com/watch	www.youtube.com/watch	www.youtube.com/watch

Kit Features

Unpopulated printed circuit board (PCB) designed for wideband operational amplifiers in the tiny SOT-23 package.
The board accepts only surface mount resistors and capacitors to avoid parasitic component inductance
The board was designed to accommodate a variety of amplifiers:
- Voltage feedback types
- Current feedback types
The Evalauation board handles both 5-lead SOT-23 and 6-lead SOT-23 package.
The sixth lead may be an optional function pin for those amplifiers featuring a disable function.
For voltage feedback amplifiers, changing the impedance level (increasing or decreasing RF and RG) can also control the amount of peaking.
For current feedback amplifiers, increasing RF from its nominal value will reduce the achievable bandwidth, while decreasing RF will cause the frequency response to peak more. However, at higher gains, it might be advantageous to decrease RF in order to optimize for bandwidth.

Kit Contents

The Texas Instrument's DEM-OPA-SOT-1ADEM-OPA-SOT-1A supplied with below contents:

DEM-OPA-SOT-1ADEM-OPA-SOT-1A Demonstration fixture for SOT-23 Opamps

Tags: dem-opa-sot-1a, sot-23, demonstration_fixture, texas_instruments