OPA860

OPA860 www.ti.com ....................................................................................................................................................... SBOS331C – JUNE 2005 – REVISED AUGUST 2008 Wide Bandwidth OPERATIONAL TRANSCONDUCTANCE AMPLIFIER (OTA) and BUFFER OTA FEATURES 1 2 Wide Bandwidth (80MHz, Open-Loop, G = +5) High Slew Rate (900V/µs) High Transconductance (95mA/V) External IQ-Control BUFFER FEATURES Closed-Loop Buffer Wide Bandwidth (1600MHz, VO = 1VPP) High Slew Rate (4000V/µs) 60mA Output Current OPA860 FEATURES Low Quiescent Current (11.2mA) Versatile Circuit Function APPLICATIONS Baseline Restore Circuits Video/Broadcast Equipment Communications Equipment High-Speed Data Acquisition Wideband LED Driver AGC-Multiplier ns-Pulse Integrator Control Loop Amplifier OPA660 Upgrade DESCRIPTION The OPA860 is a versatile monolithic component designed for wide-bandwidth systems, including high performance video, RF and IF circuitry. It includes a wideband, bipolar operational transconductance amplifier (OTA), and voltage buffer amplifier. The OTA or voltage-controlled current source can be viewed as an ideal transistor. Like a transistor, it has three terminals—a high impedance input (base), a low-impedance input/output (emitter), and the current output (collector). The OTA, however, is self-biased and bipolar. The output collector current is zero for a zero base-emitter voltage. AC inputs centered about zero pr...