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LM4985 Datasheet(PDF) 8 Page - Texas Instruments |
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LM4985 Datasheet(HTML) 8 Page - Texas Instruments |
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8 / 33 page  LM4985, LM4985TMEVAL SNAS346B – MAY 2006 – REVISED MAY 2006 www.ti.com Electrical Characteristics VDD = 2.5V (1)(2) (continued) The following specifications apply for RL = 16Ω, f = 1kHz, and CB = 4.7µF unless otherwise specified. Limits apply to TA = 25°C. Symbol Parameter Conditions LM4985 Units (Limits) Typ(3) Limit(4)(5) RLOAD = 16Ω OCL, PO = 26mW 0.07 RLOAD = 16Ω C-CUPL, PO = 20mW 0.05 THD+N Total Harmonic Distortion + Noise % RLOAD = 32Ω OCL, PO = 16mW 0.06 RLOAD = 32Ω C-CUPL, PO = 15mW 0.04 VON Output Noise Voltage VIN = AC GND, AV = 0dB, A-weighted 10 µV VRIPPLE = 200mVp-p (6) fIN = 217Hz sinewave OCL 75 C-CUPL 59 PSRR Power Supply Rejection Ratio dB fIN = 1kHz sinewave OCL 75 C-CUPL 59 Pout = 20mW, OCL RLOAD = 16Ω 50 dB RLOAD= 32Ω 55 Xtalk Channel-to-Channel Crosstalk Pout = 20mW. C-CUPL RLOAD = 16Ω 58 dB RLOAD= 32Ω 67 CBYPASS = 4.7µF (7) WT1 = 0, WT0 = 0 OCL 66 C-CUPL 214 WT1 = 0, WT0 = 1 OCL 92 TWU Wake Up Time from Shutdown C-CUPL 544 msec WT1 = 1, WT0 = 0 OCL 145 C-CUPL 1053 WT1 = 1, WT0 = 1 OCL 250 C-CUPL 2098 Stereo mode 20 RIN Input Resistance k Ω Mono mode 10 AVMIN Minimum Gain Code = 00000 –76 dB AVMAX Maximum Gain Code = 11111 18 dB 18dB ≥ AV ≥ –44dB ± 0.5 ΔAV Gain Accuracy per Step dB –44dB ≥ AV > –76dB ± 1.0 OCL VOS Output Offset Voltage RLOAD = 32Ω 2.0 mV VIN = AC GND (6) 10 Ω terminated input. (7) The wake-up time (TWU) is calculated using the following formula; TWU = [CBYPASS (VDD) / 2 (IBYPASS)] + 40ms. External Components Description (See Figure 2) Components Functional Description 1. CI Input coupling capacitor which blocks the DC voltage at the amplifier's input terminals. Also creates a high-pass filter with Ri at fc = 1/(2πRiCi). Refer to the section Proper Selection of External Components, for an explanation of how to determine the value of Ci. 2. 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. 8 Submit Documentation Feedback Copyright © 2006, Texas Instruments Incorporated Product Folder Links: LM4985 LM4985TMEVAL |
Similar Part No. - LM4985_14 |
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Similar Description - LM4985_14 |
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