Datasheet
SLAS412− DECEMBER 2003
www.ti.com
5
ELECTRICAL CHARACTERISTICS
At +25°C, AVDD,DRVDD,IOVDD = 3.3 V, DVDD = 1.8 V, Int. V
ref
= 2.5 V, Fs (Audio) = 48 kHz, unless otherwise noted (continued)
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
DAC INTERPOLATION FILTER
Pass band 20 0.45 Fs Hz
Pass band ripple ±0.06 dB
Transition band 0.45 Fs 0.5501 Fs Hz
Stop band 0.5501 Fs 7.455 Fs Hz
Stop band attenuation 65 dB
Filter group delay 21/Fs sec
De−emphasis error ±0.1 dB
DAC LINE OUTPUT
1-kHz sine wave input, 48 ksps, output drivers
in low power mode, load = 10 kΩ, 10 pF
Full scale output voltage (0 dB) By design, D10−D9 = 00 in control register
06H/Page2 corresponding to 2-V
PP
output
swing
0.707 Vrms
Output common mode By design, D10−D9 = 00 in control register
06H/Page2 corresponding to 2-V
PP
output
swing
1.35 V
SNR Measured as idle channel noise, A-weighted 85 97 dBA
THD 0-dB FS input, 0-dB gain −95 dB
PSRR 1 kHz, 100 mVpp on AVDD
(2)
VGND powered
down
56 dB
Interchannel isolation Coupling from ADC to DAC 84 dB
DAC HEADPHONE OUTPUT 1-kHz sine wave input, 48 ksps, output drivers
in high power mode, load = 16 Ω, 10 pF
Full scale output voltage (0 dB) By design, D10−D9 = 00 in control register
06H/Page2 corresponding to 2-V
PP
output
swing
0.707 Vrms
SNR Measured as idle channel noise, A-weighted 85 97 dBA
THD −1 dB FS input, 0-dB gain −91 −55 dB
PSRR 1 kHz, 100 mVpp on AVDD
(1)
VGND powered
down
54 dB
Interchannel isolation Coupling from ADC to DAC 85 dB
Mute attenuation 121 dB
Maximum output power D10−D9 = 00 in control register 06H/Page2 30 mW
Digital volume control gain −63.5 0 dB
Digital volume control step size 0.5 dB
Channel separation Between HPL and HPR 80 dB
DAC SPEAKER OUTPUT Output driver in high power mode,
load = 8 Ω,, connected between HPR and HPL
pins. D10−D9 = 10 in control register
06H/Page2 corresponding to 2.402-V
PP
output
swing
Output power 0 dB input to DAC 325 mW
SNR Measured as idle channel noise, A-weighted 102 dBA
THD −1 dB FS input, 0-dB gain −86 dB
THD
−6 dB FS input, 0-dB gain −88 dB
(1)
DAC PSRR measurement is calculated as:
PSRR + 20 log
10
ǒ
VSIG
sup
V
HPRńL
Ǔ