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LM4889MM Datasheet(PDF) 5 Page - Texas Instruments |
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LM4889MM Datasheet(HTML) 5 Page - Texas Instruments |
5 / 27 page LM4889 www.ti.com SNAS157H – APRIL 2002 – REVISED MAY 2013 Electrical Characteristics VDD = 2.6V (1)(2) (continued) The following specifications apply for VDD = 2.6V, AV = 2, and 8Ω load unless otherwise specified. Limits apply for TA = 25°C. LM4889 Units Symbol Parameter Conditions (Limits) Typical(3) Limit(4)(5) Vripple = 200mV sine p-p PSRR Power Supply Rejection Ratio fripple = 217Hz 44 dB fripple = 1kHz 44 dB External Components Description (Figure 1) Components Functional Description 1. Ri Inverting input resistance which sets the closed-loop gain in conjunction with Rf. This resistor also forms a high pass filter with Ci at fC= 1/(2π RiCi). 2. Ci Input coupling capacitor which blocks the DC voltage at the amplifiers input terminals. Also creates a highpass filter with Ri at fc = 1/(2π RiCi). Refer to the section, PROPER SELECTION OF EXTERNAL COMPONENTS, for an explanation of how to determine the value of Ci. 3. Rf Feedback resistance which sets the closed-loop gain in conjunction with Ri. AVD = 2*(Rf/Ri). 4. CS Supply bypass capacitor which provides power supply filtering. Refer to the POWER SUPPLY BYPASSING section for information concerning proper placement and selection of the supply bypass capacitor. 5. CB Bypass pin capacitor which provides half-supply filtering. Refer to the section, PROPER SELECTION OF EXTERNAL COMPONENTS, for information concerning proper placement and selection of CB. Copyright © 2002–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM4889 |
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