TAS2521
SLAS687A –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, fS (audio) = 48 kHz, CODEC_CLKIN = 256 × fS,
PLL = Off
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
ANALOG BYPASS TO CLASS-D SPEAKER AMPLIFIER
BTL measurement, DRIVER GAIN = 6 dB, LOAD
= 4 Ω (DIFFERENTIAL), 50 pF, input signal
frequency fi = 1 KHz
Device Setup
Voltage Gain
Gain Error
Input common-mode = 0.9 V
4
V/V
dB
-1dBFS (446mVrms), 1-kHz input signal
±0.7
Idle channel, IN1L and IN1R ac-shorted to ground,
Measured as idle-channel noise, A-weighted(1) (2)
ICN
Idle channel noise
32.6
μVms
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, IO
50mA
=
=
=
AVDD Output Voltage 1.8V
1.79
1.79
1.79
V
V
V
SPKVDD = 3.6V, Page 1, Reg 2, D5-D4 = 00, IO
50mA
SPKVDD = 5.5V, Page 1, Reg 2, D5-D4 = 00, IO
50mA
Output Voltage Accuracy
Load Regulation
SPVDD = 2.7V
±2
7
%
mV
mV
uF
SPVDD = 2.7V, 0A to 50mA
Input Supply Range 2.7V to 5.5V
Line Regulation
0.6
Decoupling Capacitor
Bias Current
1.0
55
166
174
uA
uV
uV
Noise @0A Load
A-weighted, 20Hz to 20kHz bandwidth
A-weighted, 20Hz to 20kHz bandwidth
Noise @50mA Load
SHUTDOWN POWER CONSUMPTION
Power down POR, /RST held low, AVDD = 1.8V,
IOVDD = 1.8 V, SPKVDD = 4.2 V, DVDD = 1.8 V
Device Setup
I(AVDD)
I(DVDD)
1.32
0.04
0.68
2.24
µA
µA
µA
µA
I(IOVDD)
I(SPKVDD)
DIGITAL INPUT/OUTPUT
Logic family
CMOS
0.7 ×
IOVDD
IIH = 5 μA, IOVDD ≥ 1.6 V
IIH = 5 μA, IOVDD < 1.6 V
IIL = 5 μA, IOVDD ≥ 1.6 V
IIL = 5 μA, IOVDD < 1.6 V
IOH = 2 TTL loads
VIH
V
IOVDD
0.3 ×
–0.3
IOVDD
VIL
Logic level
V
V
0
0.8 ×
IOVDD
VOH
VOL
IOL = 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
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