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.
|Number of channels (#)|
|Total Supply Voltage (Min) (+5V=5, +/-5V=10)|
|Total Supply Voltage (Max) (+5V=5, +/-5V=10)|
|BW @ Acl (MHz)|
|Acl, min spec gain (V/V)|
|Slew Rate (Typ) (V/us)|
|Vn at flatband (Typ) (nV/rtHz)|
|Vn at 1 kHz (Typ) (nV/rtHz)|
|Iq per channel (Typ) (mA)|
|Vos (offset voltage @ 25 C) (Max) (mV)|
|Operating temperature range (C)|
|Package size: mm2:W x L (PKG)|
|CMRR (Typ) (dB)|
|Input bias current (Max) (pA)|
|Offset drift (Typ) (uV/C)|
|GBW (Typ) (MHz)|
|Output current (Typ) (mA)|
|2nd harmonic (dBc)|
|3rd harmonic (dBc)|
|-40 to 85|
SOIC | 8
SOT-23 | 5
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
5SOT-23: 8 mm2: 2.8 x 2.9 (SOT-23 | 5)