OPA2626 - High-Bandwidth, High-Precision, Low THD+N, 16-Bit and 18-Bit ADC Drivers

The OPAx626 family of operational amplifiers are 16-bit and 18-bit, high-precision, SAR ADC drivers with low total harmonic distortion (THD) and noise. This family of precision op amps 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 gain-bandwidth 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 in applications such as the ADS88xx family of SAR ADCs.

The OPAx626 family is available in 5-pin SOT and 8-pin VSSOP packages and is specified for operation from –40°C to +125°C.

• Excellent Dynamic Performance:
  • Low Distortion: –122 dBc for HD2 and
    –140 dBc for HD3 at 100 kHz
  • Gain Bandwidth (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
• Excellent DC Precision:
  • Offset Voltage: ±100 µV (Maximum)
  • Offset Voltage Drift: ±3 µV/°C (Maximum)
  • Low Quiescent Current: 2 mA (Typical)
• Input Common-Mode Range Includes Negative Rail
• Rail-to-Rail Output
• Wide Temperature Range: Fully Specified from –40°C to +125°C