The OPA861 is a versatile monolithic component designed for wide-bandwidth systems, including high performance video, RF and IF circuitry. The OPA861 is a wideband, bipolar operational transconductance amplifier (OTA).
The OTA or voltage-controlled current source can be viewed as an ideal transistor. Like a transistor, it has three terminals—a high impedance input (base), a low-impedance input/output (emitter), and the current output (collector). The OPA861, however, is self-biased and bipolar. The output collector current is zero for a zero base-emitter voltage. AC inputs centered about zero produce an output current, which is bipolar and centered about zero. The transconductance of the OPA861 can be adjusted with an external resistor, allowing bandwidth, quiescent current, and gain trade-offs to be optimized.
Used as a basic building block, the OPA861 simplifies the design of AGC amplifiers, LED driver circuits for fiber optic transmission, integrators for fast pulses, fast control loop amplifiers and control amplifiers for capacitive sensors, and active filters. The OPA861 is available in SO-8 and SOT23-6 surface-mount packages.
| Type | Title | Date | |
|---|---|---|---|
| * | Data sheet | Wide Bandwidth Operational Transconductance Amplifier (OTA) datasheet (Rev. G) | 14 May 2013 |
| Technical article | Wanted: Stable oscillator | 31 Jul 2013 | |
| Application note | Demystifying the Operational Transconductance Amplifier (Rev. A) | 16 Apr 2013 | |
| User guide | DEM-OTA-SO-1A User's Guide (Rev. A) | 02 Feb 2006 | |
| Application note | Noise Analysis for High Speed Op Amps (Rev. A) | 17 Jan 2005 |
For additional terms or required resources, click any title below to view the detail page where available.
The DEM-OTA-SO-1A demonstration fixture helps designers evaluate the operation and performance of TI's Wide Bandwidth Operational Transconductance Amplifiers (OTA). This unpopulated PC board is compatible with products offered in the 8-lead SOIC (D) package.
For more information on these types of (...)
| Package | Pins | Download |
|---|---|---|
| SOIC (D) | 8 | View options |
| SOT-23 (DBV) | 6 | View options |
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