Datasheet

TPS65950
www.ti.com SWCS032E–OCTOBER 2008–REVISED JANUARY 2011
Table 6-3. Headset Output Characteristics (continued)
Parameter Test Conditions Min Typ Max Unit
100 100 pF
Gain range
(1)
Audio path –92 30 dB
Voice path –66 30
Absolute gain error –1 1 dB
At 0.53 Vrms differential output voltage 17.56 mW
Maximum output power
Load impedance = 16 Ω
Peak-to-peak output voltage (0 dBFs) Default gain
(2)
1.5 V
PP
Single-Ended Mode ac-Coupled
Total harmonic distortion At 0 dBFs –80 –75 dB
Default gain
(2)
At –6 dBFs –74 –69
Load = 16 Ω At –20 dBFs –70 –65
At –60 dBFs –30 –25
Idle channel noise Default gain
(3)
–90 –85 dB
(20 Hz to 20 kHz, A-weighted) Load = 16 Ω
SNR (A-weighted over 20-kHz bandwidth) At 0 dBFs 82 86 dB
Output PSRR (for all gains) 20 Hz to 4 kHz 90 dB
20 Hz to 20 kHz 70
Crosstalk between right and left channels –60 dB
Single-Ended Mode (Pseudo-Ground Provided on HSOVMID)
Total harmonic distortion At 0 dBFs –75 –70 dB
Default gain
(3)
At –6 dBFs –74 –69
Load = 16 Ω At –20 dBFs –70 –65
At –60 dBFs –30 –25
Idle channel noise Default gain
(3)
–90 –85 dB
(20 Hz to 20 kHz, A-weighted) Load = 16 Ω
Output PSRR (for all gains) 20 Hz to 4 kHz 85 dB
20 Hz to 20 kHz 65
(1) Audio digital filter = –62 to 0 dB (1-dB steps) and 0 to 12 dB (6-dB steps)
Voice digital filter = –36 to 12 dB (1-dB steps)
ARXPGA (volume control) = –24 to 12 dB (2-dB steps)
Output driver = –6, 0, 6 dB
(2) The default gain setting assumes the ARXPGA has 0 dB gain setting (volume control) and output driver at 0 dB gain setting.
(3) The default gain setting assumes the ARXPGA has 0 dB gain setting (volume control) and output driver at 0 dB gain setting.
Copyright © 2008–2011, Texas Instruments Incorporated Audio/Voice Module 71
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