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TLC27L2BIDG4 Datasheet(PDF) 15 Page - Texas Instruments |
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TLC27L2BIDG4 Datasheet(HTML) 15 Page - Texas Instruments |
15 / 50 page TLC27L2, TLC27L2A, TLC27L2B, TLC27L7 LinCMOS PRECISION DUAL OPERATIONAL AMPLIFIERS SLOS052D − OCTOBER 1987 − REVISED OCTOBER 2005 15 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PARAMETER MEASUREMENT INFORMATION full-power response Full-power response, the frequency above which the operational amplifier slew rate limits the output voltage swing, is often specified two ways: full-linear response and full-peak response. The full-linear response is generally measured by monitoring the distortion level of the output while increasing the frequency of a sinusoidal input signal until the maximum frequency is found above which the output contains significant distortion. The full-peak response is defined as the maximum output frequency, without regard to distortion, above which full peak-to-peak output swing cannot be maintained. Because there is no industry-wide accepted value for significant distortion, the full-peak response is specified in this data sheet and is measured using the circuit of Figure 1. The initial setup involves the use of a sinusoidal input to determine the maximum peak-to-peak output of the device (the amplitude of the sinusoidal wave is increased until clipping occurs). The sinusoidal wave is then replaced with a square wave of the same amplitude. The frequency is then increased until the maximum peak-to-peak output can no longer be maintained (see Figure 5). A square wave is used to allow a more accurate determination of the point at which the maximum peak-to-peak output is reached. (d) f > BOM (c) f = BOM (b) BOM > f > 100 kHz (a) f = 100 kHz Figure 5. Full-Power-Response Output Signal test time Inadequate test time is a frequent problem, especially when testing CMOS high-volume, short-test-time environment. Internal capacitances are inherently higher in CMOS devices and require longer test times than their bipolar and BiFET counterparts. The problem becomes more pronounced with reduced supply levels and lower temperatures. |
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