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TLV320AIC28RGZ Datasheet(PDF) 5 Page - Texas Instruments |
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TLV320AIC28RGZ Datasheet(HTML) 5 Page - Texas Instruments |
5 / 81 page TLV320AIC28 SLAS418A − FEBRUARY 2004 − REVISED SEPTEMBER 2004 www.ti.com 5 ELECTRICAL CHARACTERISTICS (continued) At +25 °C, AVDD1, AVDD2, DRVDD, IOVDD = 3.3 V, BVDD = 3.9 V, DVDD = 1.8 V, Int. Vref = 2.5 V, Fs (Audio) = 48 kHz, unless otherwise noted (continued) PARAMETER TEST CONDITIONS MIN TYP MAX UNITS MICROPHONE INPUT TO ADC MICIN_HED 1020 Hz sine wave input, Fs = 48 ksps Full-scale input voltage (0 dB) 0.707 Vrms Input common mode 1.5 V SNR Measured as idle channel noise, 0 dB gain, A-weighted 80 90 dBA THD 0.63 Vrms input, 0-dB gain −81 −72 dB PSRR 217 Hz, 100 mV on AVDD1/2(1) 55 dB PSRR 1020 Hz, 100 mV on AVDD1/2(1) 55 dB Mute attenuation Output code with 0.63 Vrms sine wave input at 1 kHz 0000H Input resistance Only ADC on 15 50 k Ω Input resistance ADC and Sidetone on 8 16 k Ω Input capacitance 10 pF HEADSET MICROPHONE BIAS Register 1DH/Page 2, D7−D8=00 3.3 Voltage range Register 1DH/Page 2, D7−D8=01 2.5 V Voltage range Register 1DH/Page 2, D7−D8=1X 2 V 217 Hz, 100 mV on AVDD1/2 55 PSRR 217 Hz, 100 mV on BVDD 74 dB PSRR 1020 Hz, 100 mV on AVDD1/2 55 dB 1020 Hz, 100 mV on BVDD 74 Sourcing current Voltage drop <25 mV 5 mA HANDSET MICROPHONE BIAS Voltage range Register 1DH/Page 2, D6=0 2.5 V Voltage range Register 1DH/Page 2, D6=1 2 V PSRR 217 Hz, 100 mV on AVDD1/2 55 dB PSRR 1020 Hz, 100 mV on AVDD1/2 55 dB Sourcing current Voltage drop <25 mV 5 mA DAC INTERPOLATION FILTER Pass band 20 0.45Fs Hz Pass band ripple ±0.06 dB Transition band 0.45Fs 0.5501Fs Hz Stop band 0.5501Fs 7.455Fs Hz Stop band attenuation 65 dB Filter group delay 21/Fs Sec De-emphasis error ±0.1 dB (1) ADC PSRR measurement is calculated as: PSRR + 20 log 10 VSIGsup V ADCOUT where VSIGsup is the ac signal applied on AVDD1/2, which is 100 mVPP at 1020 Hz, and V ADCOUT + Amplitude of Digital Output Max Possible Digital Amplitude |
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