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| Kit Overview
The Texas Instruments DEM-OPA-SOT-1BDEM-OPA-SOT-1B demonstration fixture in the non-inverting configuration helps designers evaluate the operation and performance of TI's single high speed, wideband operational amplifiers. This unpopulated PC board is compatible with products offered in the SOT23 (DBV) package. This board has been optimized to minimize parasitics and provide good harmonic distortion for wideband, high-gain, high-speed amplifiers
This demonstration fixture is a four-layer PCB. Mid-layer 1 has only power traces. Mid-layer 2 has both ground and power traces. The ground plane has been opened up around op amp pins sensitive to capacitive loading. Power-supply traces are laid out to keep current loop areas to a minimum. Mount the SMA (or SMB) connectors vertically. The location and type of capacitors used for power-supply bypassing are crucial to high-frequency amplifiers. The tantalum capacitors, CBYPVSP and CBYPVSN, do not need to be as close to pins 6 and 2 on the PCB, and may be shared with other amplifiers.
This demonstration fixture, and the component values shown, is designed to operate in a 50W environment. Most data sheet plots are obtained this way. It is easy to change the component values for different input and output impedance levels. Do not use high impedance probes; they represent a heavy capacitive load to the op amp, and will alter the amplifier response. Instead, use low impedance (£ 500W) probes with adequate bandwidth. The probe input capacitance and resistance set an upper limit on the measurement bandwidth. If a high impedance probe must be used, place a 100W resistor on the probe tip to isolate its capacitance from the circuit.
Key Applications: Demonstration fixture for SOT23 (DBV) package opamps | |||||||||||
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Technical Documents
Learning Center
Design Elements
| Type | Description |
|---|---|
| Reference Design | TI: Reference Design for OPA847 TINA-TI (Rev. C) |
| Simulation Model | TI: SPICE Model for OPA693 |
| Simulation Model | TI: SPICE Model for OPA847 TINA-TI (Rev. A) |
| Simulation Model | TI: OPA694 PSpice Model |
| Simulation Model | TI: OPAy695 PSpice Model (Rev. B) |
| Simulation Model | TI: OPA846 PSpice Model (Rev. B) |
| Reference Design | TI: Reference Design for OPAy694 Family TINA-TI |
| Reference Design | TI: Reference Design for OPAy695 TINA-TI |
| Reference Design | TI: Reference Design for OPA846 TINA-TI |
| CAD Model | TI: CAD Models for OPA693 |
| CAD Model | TI: CAD Models for OPA694 |
| CAD Model | |
| CAD Model | TI: CAD Models for OPA846 |
| CAD Model | TI: CAD Models for OPA847 |
Video
| Video 1 | Video 2 |
|---|---|
Kit Features
Key Features for DEM-OPA-SOT-1BDEM-OPA-SOT-1B is as below:
- Unpopulated PC board is compatible with products offered in the SOT23 (DBV) package
- optimized to minimize parasitics and provide good harmonic distortion for wideband, high-gain, high-speed amplifiers.
- Demonstration fixture is a four-layer PCB.
- Mid-layer 1 has only power traces.
- Mid-layer 2 has both ground and power traces.
- The ground plane has been opened up around op amp pins sensitive to capacitive loading.
- Power-supply traces are laid out to keep current loop areas to a minimum. Mount the SMA (or SMB) connectors vertically.
- The location and type of capacitors used for power-supply bypassing are crucial to high-frequency amplifiers.
Kit Contents
The Texas Instruments DEM-OPA-SOT-1BDEM-OPA-SOT-1B supplied with below contents:
- Demonstration Fixture for Opamp SOT23 (DBV) package