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