The OPA615 is a complete subsystem for very fast and precise DC restoration, offset clamping, and low-frequency hum suppression of wideband amplifiers or buffers. Although it is designed to stabilize the performance of video signals, the circuit can also be used as a sample-and-hold amplifier, high-speed integrator, or peak detector for nanosecond pulses. The device features a wideband Operational Transconductance Amplifier (OTA) with a high-impedance cascode current source output and fast and precise sampling comparator that together set a new standard for high-speed applications. Both the OTA and the sampling comparator can be used as stand-alone circuits or combined to form a more complex signal processing stage. The self-biased, bipolar OTA can be viewed as an ideal voltage-controlled current source and is optimized for low input bias current. The sampling comparator has two identical high-impedance inputs and a current source output optimized for low output bias current and offset voltage; it can be controlled by a TTL-compatible switching stage within a few nanoseconds. The transconductance of the OTA and sampling comparator can be adjusted by an external resistor, allowing bandwidth, quiescent current, and gain trade-offs to be optimized.
The OPA615 is available in both an SO-14 surface-mount and an MSOP-10 package.
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|Iq per channel (Max) (mA)|
|Slew Rate (Typ) (V/us)|
|GBW (Typ) (MHz)|
|Output Current (Typ) (mA)|
|Vs (Min) (V)|
|Vs (Max) (V)|
|Number of Channels (#)|
|Acl, min spec gain (V/V)|
|BW @ Acl (MHz)|
|Vos (Max) (mV)|
|Vn at Flatband (Typ) (nV/rtHz)|
|IIB (Max) (nA)|
|Operating Temperature Range (C)|
|Package Size: mm2:W x L (PKG)|
|-40 to 85|
SOIC | 14
VSSOP | 10
14SOIC: 52 mm2: 6 x 8.65 (SOIC | 14)
10VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 10)