LT1228 Datasheet PDF | Linear Technology

Linear Technology LT1228

The LT1228 implements gain control with a transconductance amplifier (voltage to current) whose gain is proportional to an externally controlled current. The LT1228 combines both amplifiers into an 8-pin package, and operates on any supply voltage from 4V (±2V) to 30V (±15V). The LT1228 transconductance amplifier has a high impedance differential input and a current source output with wide output voltage compliance.

Part No.	LT1228
Datasheet	LT1228 Download
Manufacturer	Linear Technology
Description	100MHz Current Feedback Amplifier
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FEATURES

DESCRIPTION

n Very Fast Transconductance Amplifier Bandwidth: 75MHz gm = 10 × ISET Low THD: 0.2% at 30mVRMS Input Wide ISET Range: 1µA to 1mA n Very Fast Current Feedback Amplifier Bandwidth: 100MHz Slew Rate: 1000V/µs Output Drive Current: 30mA Differential Gain: 0.04% Differential Phase: 0.1° High Input Impedance: 25MΩ, 6pF n Wide Supply Range: ±2V to ±15V n Inputs Common Mode to Within 1.5V of Supplies n Outputs Swing Within 0.8V of Supplies n Supply Current: 7mA n Available in 8-Lead PDIP and SO Packages

APPLICATIONS

n Video DC Restore (Clamp) Circuits n Video Differential Input Amplifiers n Video Keyer/Fader Amplifiers n AGC Amplifiers n Tunable Filters n Oscillators L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. The LT®1228 makes it easy to electronically control the gain of signals from DC to video frequencies. A resistor is typically used to convert the output current to a voltage, which is then amplified with a current feedback amplifier.