OPA687

® OPA 687 OPA687 For most current data sheet and other product information, visit www.burr-brown.com Wideband, Ultra-Low Noise, Voltage Feedback OPERATIONAL AMPLIFIER With Power Down TM FEATURES q HIGH GAIN BANDWIDTH: 3.8GHz q LOW INPUT VOLTAGE NOISE: 0.95nV/√Hz q VERY LOW DISTORTION: –95dBc (5MHz) q LOW DISABLED POWER: 2mW q VERY HIGH SLEW RATE: 900V/µs q STABLE FOR G ≥ 12 APPLICATIONS q q q q q q LOW DISTORTION ADC DRIVER OC-3 FIBER OPTIC RECEIVER LOW NOISE DIFFERENTIAL AMPLIFIERS EQUALIZING RECEIVERS ULTRASOUND CHANNEL AMPLIFIERS IMPROVED REPLACEMENT FOR THE CLC425 DESCRIPTION The OPA687 combines a very high gain bandwidth and large signal performance with an ultra-low input noise voltage (0.95nV/√Hz) while dissipating only 18mA supply current. Where power savings is paramount, the OPA687 also includes an optional power down pin that, when pulled low, will disable the amplifier and decrease the quiescent current to only 1% of its powered up value. This optional feature may be left disconnected to insure normal amplifier operation when no power-down is required. The combination of low input voltage and current noise, along with a 3.8GHz gain bandwidth product, make the OPA687 an ideal amplifier for wideband transimpedance +5V VCM 100Ω OPA687 20Ω stages. As a voltage gain stage, the OPA687 is optimized for a flat frequency response at a gain of +20 and is guaranteed stable down to gains of +12. New external compensation techniques allows the OPA687 to be used at any i...