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PGA870 - Programmable-Gain Amplifier

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General Description

The PGA870 is a wideband programmable-gain amplifier (PGA) for high-speed signal chain and data acquisition systems.

The PGA870 has been optimized to provide high bandwidth, low distortion, and low noise, making it ideally suited as a 14-bit analog-to-digital converter (ADC) driver for wireless base station signal chain applications.

The wide gain range of –11.5 dB to +20 dB can be adjusted in 0.5-dB gain steps through a 6-bit control word applied to the parallel interface.

Overview

PGA870 PGA870 www.ti.com SBOS436A – DECEMBER 2009 – REVISED FEBRUARY 2011 High-Speed, Fully Differential, Programmable-Gain Amplifier Check for Samples:.

Key Features

  • 1.
  • 23 Wideband +5-V Operation: 650-MHz Bandwidth.
  • Low Impedance, Voltage Mode Output.
  • Wide Gain Range:.
  • 11.5 dB to +20 dB.
  • Precise 0.5-dB Gain Steps Step-to-Step Gain Error = ±0.03 dB.
  • HD2:.
  • 93 dBc at 100 MHz.
  • HD3:.
  • 88 dBc at 100 MHz.
  • IMD3:.
  • 98 dBc at 100 MHz,.
  • 95 dBc at 200 MHz.
  • OIP3: +47 dBm at 100 MHz; Exceeds +45 dBm for Frequencies to 300 MHz.
  • Flexible Gain Control Interfa.

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