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OPA548 Datasheet(PDF) 18 Page - Texas Instruments |
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OPA548 Datasheet(HTML) 18 Page - Texas Instruments |
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18 / 36 page ![]() www.ti.com INPUT RANGE 0 60 20 40 100 Time( s) m -46.0 -46.5 -47.0 -47.5 -48.0 -48.5 -50.5 80 -49.0 V- V f=1kHz IN V R =50k OUT S W T =+25 C ° A V R =0 OUT S W -49.5 -50.0 0 60 20 40 100 Time( s) m 50.5 50.0 49.5 49.0 48.5 48.0 47.0 80 47.5 V+ V f=1kHz IN V R =50k OUT S W T =+25 C ° A V R =0 OUT S W R 10kW F R 4.8kW L R S OPA454 V+=+50V V = 50V - - V IN V OUT OUTPUT RANGE 0 60 20 40 100 Time( s) m -46.0 -46.5 -47.0 -47.5 -48.0 -48.5 -50.5 80 -49.0 V- V f=1kHz IN V R =50k OUT S W T =+25 C ° A V R =0 OUT S W -49.5 -50.0 OPA454 SBOS391 – DECEMBER 2007 The OPA454 is specified to give linear operation with input swing to within 2.5V of either supply. Generally, a gain of +1 is the most demanding configuration. Figure 61 and Figure 62 show output behavior as the input swings to within 0V of the rail, using the circuit shown in Figure 64. Figure 63 shows the behavior with an input signal that swings beyond the specified input range to within 1V of the rail, also using the circuit in Figure 64. Notice that the beginning of the phase reversal effect may be reduced by inserting series resistance (RS) in the connection to the positive input. Note that VOUT does not swing all the way to the opposite rail. Figure 63. Output Voltage With Input Voltage Down To (V–) + 1V Figure 61. Output Voltage With Input Voltage Up Figure 64. Input Range Test Circuit To V+ The OPA454 is specified to swing to within 1V of either supply rail with a 49k Ω load while maintaining excellent linearity. Swing to the rail decreases with increasing output current. The OPA454 can swing to within 2V of the negative rail and 3V of the positive rail with a 1.88k Ω load. The typical characteristic curve, Output Voltage Swing vs Output Current (Figure 11), shows this behavior in detail. Figure 62. Output Voltage With Input Voltage Down To V– 18 Submit Documentation Feedback Copyright © 2007, Texas Instruments Incorporated Product Folder Link(s): OPA454 |
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