Audio Subsystem with Mono Class D
Speaker and Class H Headphone Amplifier
ELECTRICAL_CHARACTERISTICS_(continued)
(V
LDOIN
= V
= V
= 3.7V, V
= V
= 0V. Input signal applied at INA configured single-ended, preamp gain = 0dB,
PVDD
SHDN
GND
PGND
HPLVOL = HPRVOL= SPKVOL = 0dB, speaker loads (Z
) connected between OUTP and OUTN. Headphone loads (R ) con-
SPK HP
nected from HPL or HPR to GND. SDA and SCL pullup voltage = 1.8V. Z
= J, R = J. C
= C
= C
= C
HPVSS BIAS
SPK
HP
C1P-C1N
HPVDD
= 1FF. T = T
to T , unless otherwise noted. Typical values are at T = +25NC.) (Note 1)
MAX A
A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Preamp = 0dB
2.3
Maximum Input Signal Swing
Preamp = +18dB
0.29
V
P-P
Preamp = external gain
2.3 x R /R
IN,EX F
Gain = 0dB
55
f = 1kHz (differential
input mode)
Common-Mode Rejection Ratio
CMRR
dB
Gain = +18dB
32
Input DC Voltage
Bias Voltage
IN__ inputs
1.125
1.13
1.2
1.2
1.275
1.27
V
V
V
BIAS
SPEAKER_AMPLIFIER
T
T
= +25NC, SPKM = 1
Q0.5
Q1.5
Q4
A
A
Output Offset Voltage
Click-and-Pop Level
V
mV
OS
= +25NC, SPKVOL = 0dB, SPKMIX = 0x01,
IN_DIFF = 0V
Peak voltage, T
=
A
Into shutdown
-70
-70
+25NC, A-weighted,
32 samples per
second, volume at
mute (Note 2)
K
dBV
CP
Out of shutdown
V
= 2.7V to 5.5V
50
75
65
PVDD
f = 217Hz,
V
= 200mV
RIPPLR
P-P
P-P
P-P
Power-Supply Rejection Ratio
PSRR
T
= +25NC (Note 2)
dB
A
f = 1kHz,
65
59
V
= 200mV
RIPPLR
f = 20kHz,
V
V
V
= 200mV
RIPPLR
THD+N P 1%,
= 4.2V
= 3.7V
930
725
PVDD
PVDD
Output Power
f = 1kHz,
mW
Z
SPK
= 8I + 68FH
V
PVDD
= 3.3V
562
(Note 3)
Total Harmonic Distortion +
Noise
f = 1kHz, P
= 360mW, T = +25NC,
OUT A
THD+N
SNR
0.05
0.6
%
Z
SPK
= 8Iꢀ+ 68FH
IN_DIFF = 0
(single-ended)
A-weighted, SPKMIX
= 0x03, referenced to
725mW
93
Signal-to-Noise Ratio
dB
IN_DIFF = 1 (differential)
93
250
Q20
12
Oscillator Frequency
Spread-Spectrum Bandwidth
Gain
f
kHz
kHz
dB
A
OSC
11.5
12.5
Current Limit
1.5
87
Efficiency
E
P
OUT
= 725mW, f = 1kHz, Z
= 8Iꢀ+ 68FH
%
SPK
A-weighted, (SPKMIX = 0x01), IN_DIFF = 1,
SPKVOL = 0dB
Output Noise
50
FV
RMS
6