OPA685

® OPA 685 OPA 685 OPA685 For most current data sheet and other product information, visit www.burr-brown.com Ultra-Wideband, Current-Feedback OPERATIONAL AMPLIFIER With Disable TM FEATURES q q q q q q q GAIN = +2 BANDWIDTH (900MHz) GAIN = +8 BANDWIDTH (420MHz) OUTPUT VOLTAGE SWING: ±3.6V ULTRA-HIGH SLEW RATE: 4200V/µs 3RD-ORDER INTERCEPT: > 40dBm (f < 50MHz) LOW POWER: 129mW LOW DISABLED POWER: 3mW APPLICATIONS q q q q q q q LOW COST PRECISION IF AMPLIFIER CABLE MODEM UPSTREAM DRIVER BROADBAND VIDEO LINE DRIVER VERY WIDEBAND ADC BUFFER PORTABLE INSTRUMENTS ACTIVE FILTERS ARB WAVEFORM OUTPUT DRIVER DESCRIPTION The OPA685 is a very high bandwidth, current-feedback op amp that combines exceptional 4200V/µs slew rate and low input voltage noise to deliver a precision low cost, high dynamic range Intermediate Frequency (IF) amplifier. Optimized for high gain operation, the OPA685 is ideally suited to buffering Surface Acoustic Wave (SAW) filters in an IF strip or delivering high output power at low distortion for cable modem upstream line drivers. Even higher bandwidth at lower gains gives a 900MHz video line driver for high resolution workstation graphics. The OPA685’s low 12.9mA supply current is precisely trimmed at +25°C. This trim, along with a low temperature drift, guarantees low system power overtemperature. System power may be further reduced using the optional disable control pin. Leaving this pin open, or holding it HIGH, gives normal operation. If pulled LOW, the...