HomedatasheetLT1228CS8

LT1228CS8 Datasheet

100MHz Current Feedback Amplifier with DC Gain Control
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Description

The LT1228CS8 makes it easy to electronically control the gain of signals from DC to video frequencies. The LT1228CS8 implements gain control with a transconductance ampli- fier(voltage to current) whose gain is proportional to an externally controlled current. A resistor is typically used to convert the output current to a voltage, which is then amplified with a current feedback amplifier. The LT1228CS8 combines both amplifiers into an8-pin package, and oper- ates on any supply voltage from4V(±2V) to30V(±15V). A complete differential input, gain controlled amplifier can be implemented with the LT1228 and just a few resistors. LT1228CS8 Features • Very Fast Transconductance Amplifier Bandwidth: 75MHz gm= 10 × ISET Low THD: 0.2% at30mVRMS Input Wide ISET Range: 1µA to1mA• 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 Within1.5V of Supplies• Outputs Swing Within0.8V of Supplies• Supply Current: 7mA• Available in8-Lead PDIP and SO Packages LT1228CS8 Applications • Video DC Restore(Clamp) Circuits• Video Differential Input Amplifiers• Video Keyer/Fader Amplifiers• AGC Amplifiers• Tunable Filters• Oscillators
Features

Parameters

[{"Name":"Slew Rate ","Value":"3500 V/μs"},{"Name":"-3db Bandwidth ","Value":"100MHz"},{"Name":"Current - Input Bias ","Value":"10μA"},{"Name":"Voltage - Input Offset ","Value":"3mV"},{"Name":"Current - Supply ","Value":"6mA"},{"Name":"Current - Output / Channel ","Value":"125mA"},{"Name":"Voltage - Supply, Single/Dual (±) ","Value":"4 V ~ 36 V, ±2 V ~ 18 V"},{"Name":"Operating Temperature ","Value":"0°C ~ 70°C"},{"Name":"","Value":""},{"Name":"","Value":""}]

Manufacturer information

DIODES INCORPORATED

Diodes Incorporated is a leading global manufacturer and supplier of high-quality application specific standard products within the broad discrete, logic, analog and mixed-signal semiconductor markets. Diodes serves the consumer electronics, computing, communications, industrial, and automotive markets.
Diodes’ products include diodes, rectifiers, transistors, MOSFETs, protection devices, function-specific arrays, single gate logic, amplifiers and comparators, Hall-effect and temperature sensors, power management devices, including LED drivers, AC-DC converters and controllers, DC-DC switching and linear voltage regulators, and voltage references along with special function devices, such as USB power switches, load switches, voltage supervisors, and motor controllers.
Diodes’ corporate headquarters and Americas’ sales office are located in Plano, Texas and Milpitas, California. Design, marketing, and engineering centers are located in Plano; Milpitas; Taipei, Taiwan; Taoyuan City, Taiwan; Zhubei City, Taiwan; Manchester, England; and Neuhaus, Germany. Diodes’ wafer fabrication facilities are located in Manchester and Shanghai, China. Diodes has assembly and test facilities located in Shanghai, Jinan, Chengdu, and Yangzhou, China, as well as in Hong Kong, Neuhaus and Taipei. Additional engineering, sales, warehouse, and logistics offices are located in Taipei; Hong Kong; Manchester; Shanghai; Shenzhen, China; Seongnam-si, South Korea; and Munich, Germany, with support offices throughout the world.

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