| Architecture | FET / CMOS Input, Voltage FB |
| Number of channels (#) | 1 |
| Total supply voltage (Min) (+5V=5, +/-5V=10) | 8 |
| Total supply voltage (Max) (+5V=5, +/-5V=10) | 12 |
| GBW (Typ) (MHz) | 230 |
| BW @ Acl (MHz) | 500 |
| Acl, min spec gain (V/V) | 1 |
| Slew rate (Typ) (V/us) | 290 |
| Vn at flatband (Typ) (nV/rtHz) | 7 |
| Vn at 1 kHz (Typ) (nV/rtHz) | 10 |
| Iq per channel (Typ) (mA) | 14 |
| Vos (offset voltage @ 25 C) (Max) (mV) | 0.6 |
| Rail-to-rail | No |
| Rating | Catalog |
| Operating temperature range (C) | -40 to 85 |
| CMRR (Typ) (dB) | 86 |
| Input bias current (Max) (pA) | 5 |
| Offset drift (Typ) (uV/C) | 2 |
| Output current (Typ) (mA) | 70 |
| 2nd harmonic (dBc) | 71 |
| 3rd harmonic (dBc) | 81 |
| Frequency of harmonic distortion measurement (MHz) | 5 |
- 500 MHz Unity-gain Bandwidth
- Low Input Bias Current: 2 pA
- Low Offset And Drift: ±250 μV, ±2 μV/°C
- Low Distortion: 74-dB SFDR at 5 MHz
- High-Output Current: 70 mA
- Low Input Voltage Noise: 7 nV/√Hz
The OPA656 device combines a very wideband, unity-gain stable, voltage-feedback operational amplifier with a FET-input stage to offer an ultra high dynamic-range amplifier for Analog-to-Digital Converter (ADC) buffering and transimpedance applications. Extremely low DC errors give good precision in optical applications.
The high unity-gain stable bandwidth and JFET input allows exceptional performance in high-speed, low-noise integrators.
The high input impedance and low bias current provided by the FET input is supported by the ultra-low 7-nV/√Hz input voltage noise to achieve a very low integrated noise in wideband photodiode transimpedance applications.
Broad transimpedance bandwidths are achievable given the OPA656 device’s high 230-MHz gain bandwidth product. As shown below, a –3-dB bandwidth of 1 MHz is provided even for a high 1-MΩ transimpedance gain from a 47-pF source capacitance.
