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LM4947 数据表(PDF) 7 Page - Texas Instruments |
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LM4947 数据表(HTML) 7 Page - Texas Instruments |
7 / 37 page LM4947, LM4947TLEVAL www.ti.com SNAS349C – JUNE 2006 – REVISED NOVEMBER 2007 Electrical Characteristics 3.3V (1) (2) (continued) The following specifications apply for VDD = 3.3V, TA = 25°C, and all gains are set for 0dB unless otherwise specified. Symbol Parameter Conditions LM4947 Units (Limits) Typical (3) Limits (4) VRIPPLE = 200mVPP; f = 217Hz, RL = 8Ω, CB = 2.2µF, BTL All audio inputs terminated to GND; output referred Power Supply Rejection Ratio BTL, Output Mode 1 79 dB Loudspeaker out BTL, Output Mode 3 78 dB BTL, Output Mode 5 79 dB BTL, Output Mode 7 80 dB VRIPPLE = 200mVPP; f = 217Hz, PSRR RL = 32Ω, CB = 2.2µF, BTL All audio inputs terminated to GND; output referred SE, Output Mode 2 78 dB Power Supply Rejection Ratio SE, Output Mode 4 71 dB ROUT and LOUT SE, Output Mode 6 71 dB OCL, Output Mode 2 83 dB OCL, Output Mode 4 74 dB OCL, Output Mode 6 74 dB η Class D Efficiency Output Mode 1, 3, 5 86 % f = 217Hz, VCM = 1Vpp, CMRR Common-Mode-Rejection Ratio –49 dB Mode 1, BTL, RL = 8Ω Headphone, PO = 12mW, –58 dB f = 1kHz, OCL, Mode 4, RL = 32Ω XTALK Crosstalk Headphone, PO = 12mW, –73 dB f = 1kHz, SE, Mode 4, RL = 32Ω CB = 2.2µF, OCL, RL = 32Ω 90 ms TWU Wake-Up Time from Shutdown CB = 2.2µF, SE, RL = 32Ω 115 ms Volume Control Step Size Error ±0.2 dB –60.25 dB (min) Input referred maximum attenuation -59.5 –58.75 dB (max) Digital Volume Range 17.25 dB (min) Input referred maximum gain +18 18.75 dB (max) Mute Attenuation Output Mode 1, 3, 5 87 dB (min) 8 k Ω (min) Maximum gain setting 12 14 k Ω (max) MONO_IN Input Impedance RIN and LIN Input Impedance 75 k Ω (min) Maximum attenuation setting 100 125 k Ω (max) Copyright © 2006–2007, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: LM4947 LM4947TLEVAL |
类似零件编号 - LM4947_14 |
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类似说明 - LM4947_14 |
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