Datasheet LT1229, LT1230 (Analog Devices)

LT1229/LT1230 Dual and Quad 100MHz Current Feedback Amplifiers
U FEATURES DESCRIPTIO
■ 100MHz Bandwidth The LT®1229/LT1230 dual and quad 100MHz current ■ 1000V/µs Slew Rate feedback amplifiers are designed for maximum perfor- ■ Low Cost mance in small packages. Using industry standard pinouts, ■ 30mA Output Drive Current the dual is available in the 8-pin miniDIP and the 8-pin SO ■ 0.04% Differential Gain package while the quad is in the 14-pin DIP and 14-pin SO. ■ 0.1° Differential Phase The amplifiers are designed to operate on almost any ■ High Input Impedance: 25MΩ, 3pF available supply voltage from 4V (±2V) to 30V (±15V). ■ Wide Supply Range: ±2V to ±15V These current feedback amplifiers have very high input ■ Low Supply Current: 6mA Per Amplifier impedance and make excellent buffer amplifiers. They ■ Inputs Common Mode to Within 1.5V of Supplies maintain their wide bandwidth for almost all closed-loop ■ Outputs Swing Within 0.8V of Supplies
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voltage gains. The amplifiers drive over 30mA of output
APPLICATIO S
current and are optimized to drive low impedance loads, such as cables, with excellent linearity at high frequencies. ■ Video Instrumentation Amplifiers The LT1229/LT1230 are manufactured on Linear ■ Cable Drivers Technology’s proprietary complementary bipolar process. ■ RGB Amplifiers For a single amplifier like these see the LT1227 and for ■ Test Equipment Amplifiers better DC accuracy see the LT1223. , LTC and LT are registered trademarks of Linear Technology Corporation.
U TYPICAL APPLICATIO Loop Through Amplifier Frequency Video Loop Through Amplifier Response
R R R R 10 G1 F1 G2 F2 3.01k 750Ω 187Ω 750Ω 0 NORMAL SIGNAL –10 – – –20 1/2 1/2 V V OUT 3.01k V LT1229 IN– 3.01k IN+ LT1229 –30 + + GAIN (dB) 1% RESISTORS –40 COMMON MODE SIGNAL 12.1k 12.1k WORST CASE CMRR = 22dB TYPICALLY = 38dB –50 VOUT = G (VIN+ – VIN–) –60 R 10 100 1k 10k 100k 1M 10M 100M F1 = RF2 BNC INPUTS RG1 = (G – 1) RF2 FREQUENCY (Hz) LT1229 • TA02 HIGH INPUT RESISTANCE DOES NOT LOAD CABLE EVEN RF2 RG2 = WHEN POWER IS OFF G – 1 TRIM CMRR WITH RG1 LT1229 • TA01 1