Overview
The OPA691IDBVR, produced by Texas Instruments, is a high-performance broadband current feedback operational amplifier. This device is renowned for its exceptional performance, operating on a low supply current of 5.1mA while delivering a high slew rate and output power. The OPA691 features a new output stage architecture that provides high output current with minimal voltage headroom and crossover distortion, making it ideal for single-supply operations. It can deliver an output swing from 1V to 4V with over 150mA drive current and a bandwidth of 190MHz when operated with a single +5V supply.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value | Units |
|---|---|---|---|---|
| Supply Current | 5.1mA | 4.0mA | 5.2mA | mA |
| Supply Voltage Range (Single-Supply) | - | 4V | 12V | V |
| Supply Voltage Range (Dual-Supply) | - | ±2.5V | ±6V | V |
| Output Current | - | - | 190mA | mA |
| Output Voltage Swing | - | - | ±4.0V | V |
| Slew Rate | 2100V/µs | - | - | V/µs |
| Bandwidth (G = +2, RF = 402Ω) | 190MHz | 168MHz | - | MHz |
| Power-Supply Rejection Ratio (PSRR) | 55dB | - | - | dB |
| Operating Temperature Range | - | -40°C | +85°C | °C |
| Thermal Resistance (θJA) | - | - | 150°C/W (SOT23-6) | °C/W |
Key Features
- Flexible supply range: +5V to +12V single-supply, ±2.5V to ±6V dual-supply
- Unity-gain stable with a bandwidth of 280MHz (G = 1)
- High output current: up to 190mA
- High slew rate: 2100V/µs
- Low differential gain/differential phase (dG/dφ): 0.07%/0.02°
- Low supply current: 5.1mA
- Low disabled current: less than 150µA
- Optional disable control pin for power savings
Applications
- xDSL line driver
- Broadband video buffers
- High-speed imaging channels
- Portable instruments
- ADC buffers
- Active filters
- Wideband inverting summing
- High SFDR IF amplifier
Q & A
- What is the typical supply current of the OPA691?
The typical supply current of the OPA691 is 5.1mA.
- What is the maximum output current of the OPA691?
The maximum output current of the OPA691 is up to 190mA.
- What is the slew rate of the OPA691?
The slew rate of the OPA691 is 2100V/µs.
- What is the bandwidth of the OPA691 at a gain of +2?
The bandwidth of the OPA691 at a gain of +2 is 190MHz.
- What is the operating temperature range of the OPA691?
The operating temperature range of the OPA691 is –40°C to +85°C.
- How does the disable control pin function in the OPA691?
The disable control pin, when pulled LOW, reduces the supply current to less than 150µA and puts the output into a high impedance state, allowing for power savings.
- What are some common applications of the OPA691?
The OPA691 is commonly used in xDSL line drivers, broadband video buffers, high-speed imaging channels, portable instruments, ADC buffers, active filters, wideband inverting summing, and high SFDR IF amplifiers.
- What is the thermal resistance (θJA) of the OPA691 in the SOT23-6 package?
The thermal resistance (θJA) of the OPA691 in the SOT23-6 package is 150°C/W.
- What is the power-supply rejection ratio (PSRR) of the OPA691?
The power-supply rejection ratio (PSRR) of the OPA691 is typically 55dB.
- Is the OPA691 unity-gain stable?
Yes, the OPA691 is unity-gain stable with a bandwidth of 280MHz (G = 1).
