Texas Instruments OPA625
The OPAx625 family of operational amplifiers are excellent 16-bit and 18-bit, high-precision, SAR ADC drivers with low THD and noise that allow for a unique power-scalable solution. This family of devices is fully characterized and specified with a 16-bit settling time of 280 ns that enables a true 16-bit effective number of bits (ENOB). With a high dc precision of only 100 µV offset voltage, a wide gainbandwidth product of 120 MHz, and a low wideband noise of 2.5 nV/√Hz, this family is optimized for driving high-throughput, high-resolution SAR ADCs, such as the ADS88xx family of SAR ADCs.| Part No. | OPA625 |
|---|---|
| Datasheet | OPA625 Download |
| Manufacturer |  Texas Instruments |
| Description | 16-Bit Analog-to-Digital Converter Drivers |
| Buy | Stock & Price |
FEATURES
●1 High-Drive Mode: – GBW (G = 100): 120 MHz – Slew Rate: 115 V/µs – 16-Bit Settling at 4-V Step: 280 ns – Low Voltage Noise: 2.5 nV/√Hz at 10 kHz – Low Output Impedance: 1 Ω at 1 MHz – Offset Voltage: ±100 µV (max) – Offset Voltage Drift: ±3 µV/ºC (max) – Low Quiescent Current: 2 mA (typ)● Low-Power Mode: – GBW: 1 MHz – Low Quiescent Current: 270 µA (typ)
● Power-Scalable
FEATURES
: – Ultrafast Transition from Low-Power to HighDrive Mode: 170 ns● High AC and DC Precision: – Low Distortion: –122 dBc for HD2 and –140 dBc for HD3 at 100 kHz – Input Common-Mode Range Includes Negative Rail – Rail-to-Rail Output – Wide Temperature Range: Fully Specified from –40°C to +125°C 3
DESCRIPTION
The OPAx625 features two operating modes: highdrive and low-power. In the innovative low-power mode, the OPAx625 tracks the input signal allowing the device to transition from low-power mode to highdrive mode at 16-bit ENOB within 170 ns. The OPAx625 family is available in 6-pin SOT and 10-pin VSSOP packages and is specified for operation from –40°C to +125°C.
