Datasheet LT1189 (Analog Devices)

LT1189 Low Power Video Difference Amplifier
U FEATU S RE DESCRIPTIO
■ Differential or Single-Ended Gain Block (Adjustable) The LT1189 is a difference amplifier optimized for opera- ■ –3dB Bandwidth, A tion on V = ± 10 35MHz ±5V, or a single 5V supply, and gain ≥10. This ■ Slew Rate 220V/µs versatile amplifier features uncommitted high input im- ■ Low Supply Current 13mA pedance (+) and (–) inputs, and can be used in differential ■ Output Current ±20mA or single-ended configurations. Additionally, a second set ■ CMRR at 10MHz 48dB of inputs give gain adjustment and DC control to the ■ LT1193 Pin Out difference amplifier. ■ Low Cost The LT1189’s high slew rate, 220V/µs, wide bandwidth, ■ Single 5V Operation 35MHz, and ±20mA output current require only 13mA of ■ Drives Cables Directly supply current. The shutdown feature reduces the power ■ Output Shutdown dissipation to a mere 15mW, and allows multiple amplifi-
O U
ers to drive the same cable.
APPLICATI S
The LT1189 is a low power, gain of 10 stable version of the ■ Line Receivers popular LT1193, and is available in 8-pin miniDIPs and SO ■ Video Signal Processing packages. For lower gain applications see the LT1187 ■ Cable Drivers data sheet. ■ Tape and Disc Drive Systems
O U TYPICAL APPLICATI Cable Sense Amplifier for Loop Through Connections Closed-Loop Gain vs Frequency with DC Adjust
50 VIN VS = ±5V RL = 1k 5V 40 3 + 7 CABLE 2 – 6 30 LT1189 1 VOUT VDC + 8 – 4 20 –5V VOLTAGE GAIN (dB) 909Ω 10 100Ω 00.1 1 10 100 FREQUENCY (MHz) LT1189 • TA01 LT1189 • TA02 1