PowerTune
2.5.2 DAC Power Consumption
The tables in this section give recommendations for various DAC PowerTune modes. Typical performance
and power-consumption numbers are listed.
All measurements were taken with the PLL turned off, no signal is present, and the DAC modulator is fully
running.
2.5.2.1
DAC, Stereo, 48kHz, Highest Performance, DVdd = 1.8V, AVdd = 1.8V
DOSR = 128, Processing Block = PRB_P8 (Interpolation Filter B)
Device Common Mode Setting = 0.75V
Device Common Mode Setting = 0.9V
PTM_P1
PTM_P2
PTM_P3
PTM_P4
PTM_P1
PTM_P2
PTM_P3
PTM_P4
UNIT
0dB full scale
(1)
75
211
375
375
100
281
500
500
mV
RMS
HP out
Effective SNR w.r.t.
88.4
93.4
97.0
96.7
90.7
95.3
99.2
100.1
dB
(32
Ω
0dB full scale
load)
Power
9.7
10.6
11.3
11.3
9.7
10.6
11.3
11.3
mW
consumption
(2)
Power
8.1
9.0
9.7
9.7
8.1
9.0
9.7
9.7
mW
consumption
(3)
(1)
Reduced 0dB full-scale swing can be compensated by applying appropriate gain in the output drivers see .
(2)
Measured data using PRB_P8.
(3)
Calculated data for PRB_P7.
Alternative processing blocks:
Processing Block
Filter
Est. Power Change (mW)
PRB_P1
A
0
PRB_P2
A
+3.1
PRB_P3
A
+1.6
PRB_P7
B
–1.6
PRB_P9
B
0
PRB_P10
B
+1.6
PRB_P11
B
–0.8
PRB_P23
A
0
PRB_P24
A
+3.1
PRB_P25
A
+3.1
51
SLAU434 – May 2012
TLV320DAC3203 Application
Copyright © 2012, Texas Instruments Incorporated