OPA615 宽带 DC 恢复电路 | 德州仪器 TI.com.cn

OPA615
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宽带 DC 恢复电路

宽带 DC 恢复电路 - OPA615
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描述

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.

特性

  • PROPAGATION DELAY: 1.9ns
  • BANDWIDTH:
    OTA: 710MHz
    Comparator: 730MHz
  • LOW INPUT BIAS CURRENT: ±1µA
  • SAMPLE-AND-HOLD SWITCHING TRANSIENTS: ±5mV
  • SAMPLE-AND-HOLD FEEDTHROUGH REJECTION: 100dB
  • CHARGE INJECTION: 40fC
  • HOLD COMMAND DELAY TIME: 2.5ns
  • TTL/CMOS HOLD CONTROL
  • APPLICATIONS
    • BROADCAST/HDTV EQUIPMENT
    • TELECOMMUNICATIONS EQUIPMENT
    • HIGH-SPEED DATA ACQUISITION
    • CAD MONITORS/CCD IMAGE PROCESSING
    • NANOSECOND PULSE INTEGRATOR/PEAK DETECTOR
    • PULSE CODE MODULATOR/DEMODULATOR
    • COMPLETE VIDEO DC LEVEL RESTORATION
    • SAMPLE-AND-HOLD AMPLIFIER
    • SHC615 UPGRADE

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参数

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Part number 立即下单 Acl, min spec gain (V/V) Available channels Operating temperature range (C) Output current (Typ) (mA) Package size: mm2:W x L (PKG) Rating
OPA615 立即下单 1     S     -40 to 85     20     14SOIC: 52 mm2: 6 x 8.65 (SOIC | 14)
10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)    
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