Wide Bandwidth Operational Transconductance Amplifier
Product details
Parameters
Package | Pins | Size
Features
- Wide Bandwidth (80MHz, Open-Loop, G = +5)
- High Slew Rate (900V/µs)
- High Transconductance (95mA/V)
- External IQ-Control
- Low Quiescent Current (5.4mA)
- Video/Broadcast Equipment
- Communications Equipment
- High-Speed Data Acquisition
- Wideband LED Drivers
- Control Loop Amplifiers
- Wideband Active Filters
- Line Drivers
Description
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.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | Wide Bandwidth Operational Transconductance Amplifier (OTA) datasheet (Rev. G) | May 14, 2013 |
Technical articles | Wanted: Stable oscillator | Jul. 31, 2013 | |
Application note | Demystifying the Operational Transconductance Amplifier (Rev. A) | Apr. 16, 2013 | |
User guide | DEM-OTA-SO-1A User's Guide (Rev. A) | Feb. 02, 2006 | |
Application note | Noise Analysis for High Speed Op Amps (Rev. A) | Jan. 17, 2005 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
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 (...)
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SOIC (D) | 8 | View options |
SOT-23 (DBV) | 6 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Support & training
TI E2E™ forums with technical support from TI engineers
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.