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OPA377AIDCKT Datasheet(PDF) 11 Page - Texas Instruments |
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OPA377AIDCKT Datasheet(HTML) 11 Page - Texas Instruments |
11 / 27 page C 1 0.1 F m R 100W 1 (1) +5V V IN ADS8327 LowPower 16-Bit 500kSPS C 3 (1) 1.2nF C4 100nF +5V REFIN -IN +IN REF5040 4.096V +5V OPA377 C 1 1nF C 150pF 2 R 3 5.49kW R 1 5.49kW R 2 12.4kW V+ V OUT V IN OPA377 (V+)/2 OPA377 OPA2377 OPA4377 www.ti.com SBOS504B – FEBRUARY 2010 – REVISED JANUARY 2011 ACTIVE FILTERING DRIVING AN ANALOG-TO-DIGITAL CONVERTER The OPA377 series is well-suited for filter applications requiring a wide bandwidth, fast slew The low noise and wide gain bandwidth of the rate, low-noise, single-supply operational amplifier. OPA377 family make it an ideal driver for ADCs. Figure 25 shows a 50kHz, 2nd-order, low-pass filter. Figure 26 illustrates the OPA377 driving an The components have been selected to provide a ADS8327, 16-bit, 250kSPS converter. The amplifier is maximally-flat Butterworth response. Beyond the connected as a unity-gain, noninverting buffer. cutoff frequency, roll-off is –40dB/dec. The Butterworth response is ideal for applications requiring predictable gain characteristics such as the anti-aliasing filter used ahead of an analog-to-digital converter (ADC). (1) Suggested value; may require adjustment based on specific application. (2) Initial calibration recommended. Figure 26. Driving an ADS8327(2) Figure 25. Second-Order Butterworth 50kHz Low-Pass Filter © 2010–2011, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Link(s): OPA377 OPA2377 OPA4377 |
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