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LM4931ITL/NOPB Datasheet(PDF) 10 Page - Texas Instruments |
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LM4931ITL/NOPB Datasheet(HTML) 10 Page - Texas Instruments |
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10 / 50 page  LM4931 SNAS251E – APRIL 2004 – REVISED MAY 2013 www.ti.com Electrical Characteristics DVDD = 3.3V, AVDD = 5V, RLHP = 32Ω, RLHF = 8Ω (1)(2) (continued) The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for TA= 25°C. Symbol Parameter Conditions LM4931 Units (Limits) Typical(3 Limits(4) ) SBAVDAC Voice DAC Stopband Attenuation Above 4kHz 72 dB UPBVADC Upper Passband Cutoff Frequency Upper – 3dB Point 3.47 kHz LPBVADC Lower Passband Cutoff Frequency Lower – 3dB Point 0.230 kHz SBAVADC Voice ADC Stopband Attenuation Above 4kHz 65 dB SBANOTCH Voice ADC Notch Attenuation Centered on 55Hz, figure gives worst case 58 dB attenuation for 50Hz & 60Hz Signal = VO at f = 1kHz and 1% THD+N, MIC_P, MIC_N terminated to ground, Signal-to-Noise Ratio of Voice A-weighted, 36dB MIC Preamp gain setting(7) SNR (Voice) Channel (Voice ADC path) fMCLK = 12.288MHz, PLL disabled 83 dB fMCLK = 12MHz, PLL active 81 dB Minimum –30 dB STR Side Tone Range Maximum 0 dB SS Side Tone Step Size 3 dB Audio DAC (Typical numbers are with 6.144MHz audio clock and 48kHz sampling frequency) RDAC Audio DAC Ripple 20Hz – 20kHz through headphone output +/- 0.1 dB PBDAC Audio DAC Passband width –3dB point 22.7 kHz SBADAC Audio DAC Stop band Attenuation Above 24kHz 76 dB DRDAC Audio DAC Dynamic Range DC – 20kHz 97 dB SNRDAC Audio DAC SNR Digital Filter Section DC – 20kHz 97 dB PLL fIN 10 MHz (min) Input Frequency on MCLK pin 12 20 MHz (max) SPI/I2C fSPI Maximum SPI Frequency 400 4000 kHz (max) tSPISETD SPI Data Setup Time 100 ns (min) tSPISETENB SPI ENB Setup Time 100 ns (min) tSPISETHOLDD SPI Data Hold Time 100 ns (min) tSPIHOLDENB SPI ENB Hold Time 100 ns (min) tSPICL SPI Clock Low Time 500 ns (min) tSPICH SPI Clock High Time 500 ns (min) tSPIT SPI Clock TransitionTime 5 ns (min) tCLKI2C I2C_CLK Frequency 400 3400 kHz (max) tI2CHOLD I2C_DATA Hold Time 100 ns (min) tI2CSET I2C_DATA Setup Time 100 ns (min) PCM/I2S fCLKPCM PCM_CLK Frequency 128 kHz 40 % (min) PCM_CLK Duty Cycle 50 60 % (max) I2S_RES = 0 1536 fCLKI2S I2S_CLK Frequency kHz I2S_RES = 1 3072 40 % (min) I2S_WS Duty Cycle 50 60 % (max) 10 Submit Documentation Feedback Copyright © 2004–2013, Texas Instruments Incorporated Product Folder Links: LM4931 |
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