DESCRIPTION
The LT®1222 is a low noise, very high speed operational amplifier with superior DC performance. The LT1222 is stable in a noise gain of 10 or greater without compensation, or the part can be externally compensated for lower closed-loop gain at the expense of lower bandwidth and slew rate. It features reduced input offset voltage, lower input bias currents, lower noise and higher DC gain than devices with comparable bandwidth and slew rate. The circuit is a single gain stage that includes proprietary DC gain enhancement circuitry to obtain precision with high speed. The high gain and fast settling time make the circuit an ideal choice for data acquisition systems. The circuit is also capable of driving capacitive loads which makes it useful in buffer or cable driver applications. The compensation node can also be used to clamp the output swing.

FEATURES
■ Gain-Bandwidth: 500MHz
■ Gain of 10 Stable Uncompensated
■ Slew Rate: 200V/μs
■ Input Noise Voltage: 3nV/√Hz
■ C-LoadTM Op Amp Drives Capacitive Loads
■ External Compensation Pin
■ Maximum Input Offset Voltage: 300μV
■ Maximum Input Bias Current: 300nA
■ Maximum Input Offset Current: 300nA
■ Minimum Output Swing Into 500Ω: ±12V
■ Minimum DC Gain: 100V/mV, RL = 500Ω
■ Settling Time to 0.1%: 75ns, 10V Step
■ Settling Time to 0.01%: 120ns, 10V Step
■ Differential Gain: 0.4%, AV = 2, RL = 150Ω
■ Differential Phase: 0.1°, AV = 2, RL = 150Ω

APPLICATIONS
■ Wideband Amplifiers
■ Buffers
■ Active Filters
■ Video and RF Amplification
■ Cable Drivers
■ 8-, 10-, 12-Bit Data Acquisition Systems