Description

The LT1228CN8#PBF is an electronic component in the instrumentation OpAmps product category. It is designed to electronically control the gain of signals from DC to video frequencies. The LT1228 uses a transconductance amplifier (voltage to current) with externally controlled current to implement gain control. The output current is converted to a voltage using a resistor and then amplified with a current feedback amplifier. This 8-pin package operates on a supply voltage range of 4V (±2V) to 30V (±15V) and can be easily used to implement a complete differential input, gain-controlled amplifier with just a few resistors.

Specifications and features

Features:

• Very Fast Transconductance Amplifier
• Bandwidth: 75MHz
• gm = 10 × ISET
• Low THD: 0.2% at 30mVRMS Input
• Wide ISET Range: 1µA to 1mA
• 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
• Wide Supply Range: ±2V to ±15V
• Inputs Common Mode to Within 1.5V of Supplies
• Outputs Swing Within 0.8V of Supplies
• Supply Current: 7mA
• Available in 8-Lead PDIP and SOIC Packages

Application Scenarios

The LT1228CN8#PBF can be used in various applications, including:

• Video DC Restore (Clamp) Circuits
• Video Differential Input Amplifiers
• Video Keyer/Fader Amplifiers
• AGC Amplifiers
• Tunable Filters
• Oscillators

Comparison

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