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LM4937 Folha de dados(PDF) 7 Page - Texas Instruments |
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LM4937 Folha de dados(HTML) 7 Page - Texas Instruments |
7 / 41 page LM4937 www.ti.com SNAS369J – OCTOBER 2006 – REVISED MAY 2013 VOLUME CONTROL ELECTRICAL CHARACTERISTICS (1)(2) (continued) The following specifications apply for 3.0V ≤ AVDD ≤ 5.0V and 2.7V ≤ DVDD ≤ 4.0V, unless otherwise specified. Limits apply for TA = 25°C. Symbol Parameter Conditions LM4937 Units (Limits) Typical(3) Limits(4)(5) RINPUT DIFF+, DIFF-, LIN and RIN Input 18 k Ω (min) 23 Impedance 28 k Ω (max) DIGITAL SECTION ELECTRICAL CHARACTERISTICS (1) (2) The following specifications apply for 3.0V ≤ AVDD ≤ 5.0V and 2.7V ≤ DVDD ≤ 4.0V, unless otherwise specified. Limits apply for TA = 25°C. Symbol Parameter Conditions LM4937 Units (Limits) Typical(3) Limits(4)(5) Mode 0, DVDD = 3.0V DISD Digital Shutdown Current No MCLK 0.01 μA fMCLK = 12MHz, DVDD = 3.0V DIDD Digital Power Supply Current 5.3 6.5 mA (max) ALL MODES EXCEPT 0 PLLIDD PLL Quiescent Current fMCLK = 12MHz, DVDD = 3.0V 4.8 6 mA (max) 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 22.6 kHz SBADAC Audio DAC Stop band Attenuation Above 24kHz 76 dB Audio DAC Dynamic Range DC - 20kHz, –60dBFS; AES17 Standard DRDAC Table 4 dB See Table 4 Audio DAC-AMP Signal to Noise A-Weighted, Signal = VO at 0dBFS, f = Ratio 1kHz SNR Table 4 dB Noise = digital zero, A-weighted, See Table 4 SNRDAC Internal DAC SNR A-weighted(6) 95 dB PLL 10 fIN Input Frequency on MCLK pin 12 MHz 26 SPI/I2C (1.7V ≤ I2CVDD ≤ 2.2V) fSPI Maximum SPI Frequency 1000 kHz (max) tSPISETD SPI Data Setup Time 250 ns (max) tSPISETENB SPI ENB Setup Time 250 ns (max) tSPIHOLDD SPI Data Hold Time 250 ns (max) tSPIHOLDENB SPI ENB Hold Time 250 ns (max) tSPICL SPI Clock Low Time 500 ns (max) tSPICH SPI Clock High Time 500 ns (max) fCLKI2C I2C_CLK Frequency 400 kHz (max) tI2CHOLD I2C_DATA Hold Time 250 ns (max) tI2CSET I2C_DATA Setup Time 250 ns (max) (1) All voltages are measured with respect to the GND pin unless otherwise specified. (2) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication of device performance. (3) Typicals are measured at 25°C and represent the parametric norm. (4) Limits are specified to AOQL (Average Outgoing Quality Level). (5) Datasheet min/max specification limits are specified by design, test, or statistical analysis. (6) Internal DAC only with DAC modes 00 and 01. Copyright © 2006–2013, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: LM4937 |
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