OPA699

OPA699 OPA699 www.ti.com SBOS261D – NOVEMBER 2002 – REVISED DECEMBER 2008 Wideband, High Gain VOLTAGE LIMITING AMPLIFIER FEATURES q HIGH LINEARITY NEAR LIMITING q FAST RECOVERY FROM OVERDRIVE: 1ns q LIMITING VOLTAGE ACCURACY: ±10mV q –3dB BANDWIDTH (G = +6): 260MHz q GAIN BANDWIDTH PRODUCT: 1000MHz q STABLE FOR G ≥ +4V/V q SLEW RATE: 1400V/µs q ±5V AND +5V SUPPLY OPERATION q LOW GAIN VERSION: OPA698 APPLICATIONS q TRANSIMPEDANCE WITH FAST OVERDRIVE RECOVERY q FAST LIMITING ADC INPUT DRIVER q LOW PROP DELAY COMPARATOR q NONLINEAR ANALOG SIGNAL PROCESSING q DIFFERENCE AMPLIFIER q IF LIMITING AMPLIFIER q OPA689 UPGRADE DESCRIPTION The OPA699 is a wideband, voltage-feedback op amp that offers bipolar output voltage limiting, and is stable for gains ≥ +4. Two buffered limiting voltages take control of the output when it attempts to drive beyond these limits. This new output limiting architecture holds the limiter offset error to ±10mV. The op amp operates linearly to within 20mV of the limits. The combination of narrow nonlinear range and low limiting offset allows the limiting voltages to be set within 100mV of the desired linear output range. A fast 1ns recovery from limiting ensures that overdrive signals will be transparent to the signal channel. Implementing the limiting function at the output, as opposed to the input, gives the specified limiting accuracy for any gain, and allows the OPA699 to be used in all standard op amp applications. Nonlinear analog signal process...