OPA857 Overview
The OPA857 is a wideband, fast overdrive recovery, fast-settling, ultralow-noise transimpedance amplifier targeted at photodiode monitoring applications. With selectable feedback resistance, the OPA857 simplifies the design of high-performance optical systems. Very fast overload recovery time and internal input protection provide the best bination to protect the remainder of the signal chain from overdrive while...
OPA857 Key Features
- 1 Internal Midscale Reference Voltage
- Pseudo-Differential Output Voltage
- Wide Dynamic Range
- Closed-Loop Transimpedance Bandwidth
- 125 MHz (5-kΩ Transimpedance Gain, 1.5-pF External Parasitic Capacitance)
- 105 MHz (20-kΩ Transimpedance Gain, 1.5-pF External Parasitic Capacitance)
- Ultralow Input-Referred Current Noise (Brickwall Filter BW = 135 MHz): 15 nARMS (20-kΩ Transimpedance)
- Very Fast Overload Recovery Time: < 25 ns
- Internal Input Protection Diode
- Power Supply