WM8737L
Production Data
ELECTRICAL CHARACTERISTICS
Test Conditions
DCVDD = 1.5V, AVDD = MVDD = 3.3V, TA = +25oC, 1kHz -1dBFS signal, Normal Power Mode, fs = 48kHz, PGA gain = 0dB, 24-
bit audio data, unless otherwise stated. Microphone preamplifier at maximum bias (default) and gain 13dB, unless otherwise
stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Microphone Preamplifier (LINPUT1/2/3, RINPUT1/2/3) to ADC
Microphone Pre-amp (Boost)
Gain
MICBOOST = 00
MICBOOST = 01
MICBOOST = 10
MICBOOST = 11
Voltage at 1kHz
13
18
28
33
6
dB
Microphone preamplifier noise
(referred to input)
nV / Hz
Micboost gain = 28dB
at 20Hz – 20kHz
(A-weighted)
0.7
-123
1
V rms
dBV
mV
Micboost gain = 28dB
Input Offset Voltage
Microphone preamplifier Signal
to Noise Ratio
SNR
AVDD = 3.3V
600 Rsource
AVDD=1.8V
600 Rsource
28 dB gain,
AVDD = 3.3V
600 Rsource
109
dB
(A-weighted)
(Note 1)
102
94
Dynamic Range (Note 2)
DNR
THD
A-weighted, -60dBFS
Gain = 0dB
94
dB
Total Harmonic Distortion
(Note 3)
13dB gain,
-74
dB
%
AVDD = 3.3V, Single
Channel
0.02
13dB gain,
-70
AVDD=1.8V, Single
Channel
0.03
Channel Separation
Power Supply Rejection Ratio
Input Leakage
-65
60
1
dB
dB
A
PSRR
1kHz, 100mV pk-pk,
Microphone preamplifier
enabled
-10
10
Input Resistance
500k
PD, Rev 4.4, January 2012
6
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
