Datasheet

TLV320DAC3100
SLAS671A –FEBRUARY 2010–REVISED MAY 2012 www.ti.com
DOSR = 384, Processing Block = PRB_P12 (Interpolation Filter B)
Power consumption = 14.42 mW
Table 5-8. PRB_P12 Alternative Processing Blocks, 14.42 mW
Processing Block Filter Estimated Power Change (mW)
PRB_P4 A 0.16
PRB_P5 A 0.3
PRB_P6 A 0.2
PRB_P13 B 0.15
PRB_P14 B 0.07
PRB_P15 B 0.18
PRB_P16 B 0.09
5.3.5 DAC Playback on Headphones, Stereo, 192 kHz, DVDD = 1.8 V, AVDD = 3.3 V,
HPVDD = 3.3 V
DOSR = 32, Processing Block = PRB_P17 (Interpolation Filter C)
Power consumption = 27.05 mW
Table 5-9. PRB_P17 Alternative Processing Blocks, 27.05 mW
Processing Block Filter Estimated Power Change (mW)
PRB_P18 C 5.28
PRB_P19 C 1.98
5.3.6 DAC Playback on Line Out (10 k-Ω load), Stereo, 48 kHz, DVDD = 1.8 V, AVDD = 3 V,
HPVDD = 3 V
DOSR = 64, Processing Block = PRB_P7 (Interpolation Filter B)
Power consumption = 12.85 mW
5.4 Analog Signals
The TLV320DAC3100 analog signals consist of:
• Microphone bias (MICBIAS)
• Analog inputs AIN1 and AIN2
• Analog outputs, class-D speaker driver and headphone/lineout driver, providing output capability for the
DAC, AIN1, AIN2 or a mix of the three
5.4.1 MICBIAS
The TLV320DAC3100 includes a microphone bias circuit which can source up to 4 mA of current and is
programmable to a 2-V, 2.5-V, or AVDD level. The level can be controlled by writing to page 1 /
register 46, bits D1–D0. This functionality is shown in Table 5-10.
Table 5-10. MICBIAS Settings
D1 D0 FUNCTIONALITY
0 0 MICBIAS output is powered down.
0 1 MICBIAS output is powered to 2 V.
1 0 MICBIAS output is powered to 2.5 V.
1 1 MICBIAS output is powered to AVDD.
20 APPLICATION INFORMATION Copyright © 2010–2012, Texas Instruments Incorporated
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