LT1194

The LT1194 is a video difference amplifier optimized for operation on ±5V,and a single +5V suppIy.The amplifier has affixed gain of 20dB, and features adjustable input limiting to control tough over-drive applications.It has uncommitted high input impedance(+)and(-)inputs, and can be used in differential or single-ended configurations.The LT1194's high slew rate, 500V/s, wide bandwidth, 35MHz, and ±50mA output current, make it ideal for driving cables directly. This versatile amplifier is easy to use for video, or applications requiring speed, accuracy, and low cost.

Features of the LT1194 are:(1)differential or single-ended gain block:±10 (20dB); (2)-3dB bandwidth:35MHz; (3)slew rate: 500V/s; (4)low cost; (5)output current:±50mA; (6)settling time:200ns to 0.1%; (7)CMRR@10MHz: 45dB; (8)differential gain error: 0.2%; (9)differential phase error: 0.08°; (10)input amplitude limiting; (11)single +5v operation; (12)drives cables directly.The video difference amplifier has been optimized as a low cost cable driver. The ±50mA guaranteed output current enables the device to easily deliver 7.5Vp-p into 100, while operating on ±5V supplies, or 2.6Vp-p on a single 5V supply.

The absolute maximum ratings of the LT1194 can be summarized as:(1)total supply voltage:18V;(2)storage temperature range:-65 to 150;(3)operating junction temperature:-55 to 150;(4)lead temperature:300;(5)differental input voltage:±6V.The LT1194 can be used to make a fast, precise, voltage controlled current source. The high speed differential amplifier senses the current delivered to the load.The input signal ViN, applied to the(+)inputofthe,will appear at the(-)input if the feedback loop is properly closed. In steady state the input signal appears at the output of the LT1194, and 1110 of this signal is applied across the sense resistor.The compensation capacitor Cc forces the device to be the dominate pole for the loop, while the LT1194 is fast enough to be transparent in the feedback path. The ratio of the load resistor to the sense resistor should be approximately 10:1 or greater for easy compensation.