Texas Instruments OPA625/OPA2625 High-Bandwidth Op Amps
Texas Instruments OPA625/OPA2625 High-Bandwidth Operational Amplifiers are excellent 16-bit and 18-bit, SAR ADC drivers. These amplifiers come with low THD and low noise which allows for a unique power-scalable solution. Each device is fully characterized and specified with a 16-bit settling time of 280ns. This enables a true 16-bit effective number of bits.
Along with a high DC precision of only 100µV offset voltage, a wide gain-bandwidth product of 120MHz, and a low wideband noise of 2.5nV/√Hz, these devices are optimized for driving high-throughput. This makes them ideal for high-resolution SAR ADCs, such as the TI ADS88xx family. Texas Instruments OPA625/OPA2625 features two operating modes: high-drive and low-power. In the innovative low-power mode, they track the input signal. This allows it to transition from low-power mode to high-drive mode at 16-bit ENOB within 170ns.
Features
- High-Drive Mode
- 120MHz GBW (G = 100)
- 115V/µs slew rate
- 16-Bit Settling at 4V Step: 280ns
- 2.5nV/vHz at 10kHz low voltage noise
- 1Ω at 1MHz output impedance
- ±100µV (max) offset voltage
- ±3µV/ºC (max) offset voltage drift
- 2mA (typ) quiescent current
- Low-Power Mode
- 1MHz GBW
- 250µA (typ) quiescent current
- Power-Scalable Features
- Ultrafast transition from low-power to high-drive mode: 170ns
- High AC and DC Precision
- Low Distortion
- -122dBc for HD2
- -140dBc for HD3 at 100kHz
- Input common-mode range includes negative rail
- Rail-to-Rail output
- -40°C to +125°C temperature range
- Low Distortion
Applications
- Precision SAR ADC drivers
- Precision voltage reference buffers
- Programmable logic controllers
- Test and measurement equipment
- Power-sensitive data acquisition systems
Evaluation Module
Texas Instruments OPAMPEVM-MSOPTSSOP Evaluation Board
A general-purpose blank circuit board that simplifies the evaluation of surface-mount op-amps.
Block Diagram
Publicerad: 2015-06-25
| Uppdaterad: 2022-03-11