Datasheet
TAS2505
SLAS778A –FEBRUARY 2013–REVISED FEBRUARY 2013
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Electrical Characteristics (continued)
At 25°C, AVDD = 1.8V, IOVDD = 1.8 V, SPKVDD = 3.6 V, DVDD = 1.8 V, f
S
(audio) = 48 kHz, CODEC_CLKIN = 256 × f
S
,
PLL = Off
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ANALOG BYPASS TO CLASS-D SPEAKER AMPLIFIER
BTL measurement, DRIVER GAIN = 6 dB, LOAD
Device Setup = 4 Ω (DIFFERENTIAL), 50 pF, input signal
frequency fi = 1 KHz
Voltage Gain Input common-mode = 0.9 V 4 V/V
Gain Error -1dBFS (446mVrms), 1-kHz input signal ±0.7 dB
Idle channel, IN1L and IN1R ac-shorted to ground,
ICN Idle channel noise 32.6 μVms
Measured as idle-channel noise, A-weighted
(1) (2)
THD+N Total harmonic distortion + noise -1 dBFS (446mVrms), 1-kHz input signal -73.7 dB
LOW DROPOUT REGULATOR (AVDD)
SPKVDD = 2.7V, Page 1, Reg 2, D5-D4 = 00, I
O
=
AVDD Output Voltage 1.8V 1.79 V
50mA
SPKVDD = 3.6V, Page 1, Reg 2, D5-D4 = 00, I
O
=
1.79 V
50mA
SPKVDD = 5.5V, Page 1, Reg 2, D5-D4 = 00, I
O
=
1.79 V
50mA
Output Voltage Accuracy SPVDD = 2.7V ±2 %
Load Regulation SPVDD = 2.7V, 0A to 50mA 7 mV
Line Regulation Input Supply Range 2.7V to 5.5V 0.6 mV
Decoupling Capacitor 1.0 uF
Bias Current 55 uA
Noise @0A Load A-weighted, 20Hz to 20kHz bandwidth 166 uV
Noise @50mA Load A-weighted, 20Hz to 20kHz bandwidth 174 uV
SHUTDOWN POWER CONSUMPTION
Power down POR, /RST held low, AVDD = 1.8V,
Device Setup
IOVDD = 1.8 V, SPKVDD = 4.2 V, DVDD = 1.8 V
I(AVDD) 1.32 µA
I(DVDD) 0.04 µA
I(IOVDD) 0.68 µA
I(SPKVDD) 2.24 µA
DIGITAL INPUT/OUTPUT
Logic family CMOS
0.7 ×
I
IH
= 5 μA, IOVDD ≥ 1.6 V
IOVDD
V
IH
V
I
IH
= 5 μA, IOVDD < 1.6 V IOVDD
0.3 ×
I
IL
= 5 μA, IOVDD ≥ 1.6 V –0.3
IOVDD
V
IL
Logic level V
I
IL
= 5 μA, IOVDD < 1.6 V 0
0.8 ×
V
OH
I
OH
= 2 TTL loads V
IOVDD
V
OL
I
OL
= 2 TTL loads 0.25 V
Capacitive load 10 pF
(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.
8 ELECTRICAL SPECIFICATIONS Copyright © 2013, Texas Instruments Incorporated
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