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OPA2604 Datasheet(PDF) 10 Page - Texas Instruments |
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OPA2604 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 26 page Distortion Rejection Circuitry* (3, 5) (+) (2, 6) (–) (8) V+ (1, 7) VO (4) V– Output Stage* * Patents Granted: #5053718, 5019789 OPA2604 SBOS006A – SEPTEMBER 2000 – REVISED DECEMBER 2015 www.ti.com 7 Detailed Description 7.1 Overview The OPA2604 is a dual, FET-input operational amplifier designed for enhanced AC performance. Low distortion, low noise, and wide bandwidth provide superior performance in high quality audio and other applications requiring dynamic performance. 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 Distortion The distortion produced by the OPA2604 is below the measurement limit of virtually all commercially available equipment. A special test circuit, however, can extend the measurement capabilities. Op amp distortion can be considered an internal error source, which can be referred to the input. Figure 22 shows a circuit that causes the op amp distortion to be 101 times more than normally produced. The addition of R3 to the otherwise standard noninverting amplifier configuration alters the feedback factor or noise gain of the circuit. The closed-loop gain is unchanged, but the feedback available for error correction is reduced by a factor of 101. This extends the measurement limit, including the effects of the signal-source purity, by a factor of 101. The input signal and load applied to the op amp are the same as with conventional feedback without R3. 10 Submit Documentation Feedback Copyright © 2000–2015, Texas Instruments Incorporated Product Folder Links: OPA2604 |
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