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LT1112C Datasheet(PDF) 9 Page - Linear Technology |
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LT1112C Datasheet(HTML) 9 Page - Linear Technology |
9 / 12 page 9 LT1112/LT1114 CC HARA TERISTICS A TYPICALPERFOR CE FREQUENCY (kHz) 1 16 20 24 28 10 100 1000 LT1112/14 • TPC30 12 8 4 0 VS = ±15V VS = ±5V TA = 25°C RL = 10k Large-Signal Transient Response Small-Signal Transient Response 50 µs/DIV 2 µs/DIV AV = +1 CL = 500pF VS = ±15V AV = +1 RF = 10k CF = 100pF VS = ±15V Voltage Follower with Input Exceeding the Common-Mode Range (VS = ±5V) Undistorted Output Voltage vs Frequency INPUT: ±5.2V Sine Wave LT1112 Output OP-297 Output S APPLICATI I FOR ATIO The LT1112 dual and LT1114 quad in the plastic and ceramic DIP packages are pin compatible to and directly replace such precision op amps as the OP-200, OP-297, AD706 duals and OP-400, OP-497, AD704 quads with improved price/performance. The LT1112 in the S8 surface mount package has the standard pin configuration, i.e., the same configuration as the plastic and ceramic DIP packages. The LT1114 quad is offered in the narrow 16-pin surface mount package. All competitors are in the wide 16-pin package which occupies 1.8 times the area of the narrow package. The wide package is also 1.8 times thicker than the narrow package. The inputs of the LT1112/1114 are protected with back-to- back diodes. In the voltage follower configuration, when the input is driven by a fast large-signal pulse (>1V), the input protection diodes effectively short the output to the input during slewing, and a current, limited only by the output short-circuit protection, will flow through the diodes. The use of a feedback resistor is recommended because this resistor keeps the current below the short-circuit limit, resulting in faster recovery and settling of the output. The input voltage of the LT1112/1114 should never exceed the supply voltages by more than a diode drop. However, the example below shows that as the input voltage exceeds the common-mode range, the LT1112’s output clips cleanly, without any glitches or phase reversal. The OP- 297 exhibits phase reversal. The photos also illustrate that both the input and output ranges of the LT1112 are within |
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