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TLV320AIC3262 Datasheet(PDF) 74 Page - Texas Instruments |
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TLV320AIC3262 Datasheet(HTML) 74 Page - Texas Instruments |
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74 / 84 page  85 90 95 100 105 110 −10 0 10 20 30 40 50 Rin = 10k, SE Rin = 20k, SE Rin = 40k, SE Rin = 10k, DE Rin = 20k, DE Rin = 40k, DE Channel Gain (dB) G001 −100 −90 −80 −70 −60 −50 −40 −30 −20 −10 0 0 20 40 60 80 100 120 140 160 180 CM=0.75V, RECVDD=1.65V CM=0.9V, RECVDD=1.8V CM=1.25V, RECVDD=2.5V CM=1.5V, RECVDD=3V CM=1.65V, RECVDD=3.3V Output Power (mW) G008 TLV320AIC3262 SLAS679A – DECEMBER 2011 – REVISED SEPTEMBER 2015 www.ti.com 11.2.2.2 Reference Filtering Capacitor The TLV320AIC3262 has a built-in bandgap used to generate reference voltages and currents for the device. To achieve high SNR, the reference voltage on VREF_AUDIO should be filtered using a 10- μF capacitor from VREF_AUDIO pin to ground. 11.2.2.3 MICBIAS TLV320AIC3262 has a built-in bias voltage output for biasing of microphones. No intentional capacitors should be connected directly to the MICBIAS output for filtering 11.2.3 Application Curves Figure 34. ADC SNR vs Channel Gain Input-Referred Figure 35. Total Harmonic Distortion + Noise vs Differential Receiver Output Power 32- Ω Load 12 Power Supply Recommendations The TLV320AIC3262 integrates a large amount of digital and analog functionality, and each of these blocks can be powered separately to enable the system to select appropriate power supplies for desired performance and power consumption. The device has separate power domains for digital IO, digital core, analog core, analog input, receiver driver, charge-pump input, headphone driver, and speaker drivers. If desired, all of the supplies (except for the supplies for speaker drivers, which can directly connect to the battery) can be connected together and be supplied from one source in the range of 1.65 to 1.95 V. Individually, the IOVDD voltage can be supplied in the range of 1.1 V to 3.6 V. For improved power efficiency, the digital core power supply can range from 1.26 V to 1.95 V. The analog core voltages (AVDD1_18, AVDD2_18, AVDD4_18, and AVDD_18) can range from 1.5 V to 1.95 V. The microphone bias (AVDD3_33) and receiver driver supply (RECVDD_33) voltages can range from 1.65 V to 3.6 V. The charge-pump input voltage (CPVDD_18) can range from 1.26 V to 1.95 V, and the headphone driver supply (HVDD_18) voltage can range from 1.5 V to 1.95 V. The speaker driver voltages (SLVDD, SRVDD, and SPK_V) can range from 2.7 V to 5.5 V. For more detailed information see the TLV320AIC3262 Applications Reference Guide, SLAU309. 12.1 Device Power Consumption Device power consumption largely depends on PowerTune configuration. For information on device power consumption, see the TLV320AIC3262 Application Reference Guide, SLAU309. 74 Submit Documentation Feedback Copyright © 2011–2015, Texas Instruments Incorporated Product Folder Links: TLV320AIC3262 |
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