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.
|Part number||Order||Architecture||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)||Rail-to-rail||Rating||Operating temperature range (C)||Package Group||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)||@ MHz|
FET / CMOS Input
|1||8||12||500||1||290||7||10||14||0.6||No||Catalog||-40 to 85||
SOIC | 8
SOT-23 | 5
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
5SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 5)