WM8944B Datasheet, PDF (10/165 Pages) Cirrus Logic – Mono Low-Power CODEC with Video Buffer

WM8944B
ELECTRICAL CHARACTERISTICS
Test Conditions
DCVDD = 1.8V, DBVDD = LDOVDD = SPKVDD = 3.3V, LDOVOUT = 3.0V, GND = 0V,
T_A = +25^oC, 1kHz signal, fs = 48kHz, PGA gain = 0dB, 24-bit audio data unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
Analogue Inputs (IN1, AUX)
Maximum input signal
level (changes in
proportion to
LDOVOUT)
Single-ended input
INPGA_VOL = 0dB
Pseudo-differential input
INPGA_VOL = 0dB
Input resistance
(IN1/DMICDAT)
Input PGA path (+35.25dB)
Input PGA path (0dB)
Input PGA path (-12dB)
Output mixer path (0dB)
Output mixer path (-6dB)
Direct speaker (0dB)
Direct speaker (-6dB)
Input resistance
(AUX)
Input PGA path (All gain
settings)
Input capacitance
Analogue Inputs Programmable Gain Amplifier (PGA)
Minimum
programmable gain
Maximum
programmable gain
Gain step size
Guaranteed monotonic
Mute attenuation
Common Mode
Rejection Ratio
1kHz input
Speaker Output Programmable Gain Amplifier (PGA)
Minimum
programmable gain
Maximum
programmable gain
Gain step size
Guaranteed monotonic
Mute attenuation
ADC Input Path Performance (Input PGA to ADC)
SNR (A-weighted)
THD
-1dBFS input
THD+N
-1dBFS input
PSRR (with respect to
LDOVDD)
217Hz, 100mV pk-pk
1kHz, 100mV pk-pk
MIN
TYP
1.0
0
0.7
-3.1
4.5
105
160
15
30
10
20
96
10
-12
35.25
0.75
92
110
-57
6
1
71
84
94
-83
-77
77
90
MAX
-72
-70
UNIT
Vrms
dBV
Vrms
dBV
k
k
pF
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
10
Rev 4.3