TAS2521
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SLAS687A –FEBRUARY 2013–REVISED FEBRUARY 2013
Electrical Characteristics (continued)
At 25°C, AVDD = 1.8V, IOVDD = 1.8 V, SPKVDD = 3.6 V, DVDD = 1.8 V, fS (audio) = 48 kHz, CODEC_CLKIN = 256 × fS,
PLL = Off
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
DAC OUTPUT TO CLASS-D SPEAKER OUTPUT; LOAD = 8 Ω (DIFFERENTIAL)
BTL measurement, class-D gain = 6 dB, Measured
as idle-channel noise, A-weighted(1) (2)
ICN
Idle channel noise
35.2
1.4
μVms
Vrms
dB
BTL measurement, class-D gain = 6 dB, -3dBFS
input
Output voltage
BTL measurement, DAC input = –6 dBFS, class-D
gain = 6 dB
THD+N
Total harmonic distortion + noise
–73.6
0.7
SPKVDD = 3.6 V, BTL measurement, CM = 0.9V,
class-D gain = 18 dB, THD = 10%
SPKVDD = 4.2 V, BTL measurement, CM = 0.9V,
class-D gain = 18 dB, THD = 10%
1
SPKVDD = 5.5 V, BTL measurement, CM = 0.9V,
class-D gain = 18 dB, THD = 10%
1.7
PO
Maximum output power
W
SPKVDD = 3.6 V, BTL measurement, CM = 0.9V,
class-D gain = 18 dB, THD = 1%
0.5
SPKVDD = 4.2 V, BTL measurement, CM = 0.9V,
class-D gain = 18 dB, THD = 1%
0.8
SPKVDD = 5.5 V, BTL measurement, CM = 0.9V,
class-D gain = 18 dB, THD = 1%
1.3
ANALOG BYPASS TO HEADPHONE AMPLIFIER
AC-COUPLED LOAD = 16 Ω (SINGLE-ENDED),
Device Setup
DRIVER GAIN = 0 dB, Input and output common-
mode = 0.9 V, input signal frequency fi = 1kHz
Voltage Gain
Gain Error
Input common-mode = 0.9 V
1
V/V
dB
-1dBFS (446mVrms), 1-kHz input signal
±0.8
Idle channel, IN1L and IN1R ac-shorted to ground,
Measured as idle-channel noise, A-weighted(1) (2)
ICN
Idle channel noise
10.2
μVms
THD+N
Total harmonic distortion + noise -1 dBFS (446mVrms), 1-kHz input signal
-80.4
dB
(1) Ratio of output level with 1-kHz full-scale sine-wave input, to the output level with the inputs short-circuited, measured A-weighted over a
20-Hz to 20-kHz bandwidth using an audio analyzer.
(2) All performance measurements done with 20-kHz low-pass filter and, where noted, A-weighted filter. Failure to use such a filter may
result in higher THD+N and lower SNR and dynamic range readings than shown in the Electrical Characteristics. The low-pass filter
removes out-of-band noise, which, although not audible, may affect dynamic specification values.
Copyright © 2013, Texas Instruments Incorporated
ELECTRICAL SPECIFICATIONS
7
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