WM8850
Pre-Production
Test Conditions
AVDD = CPVDD = 5V, DBVDD = 3.3V, DCVDD = 1.8V, TA = +25oC, 1kHz signal, fs = 48kHz, 24-bit data unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VRMS
VRMS
Analogue Input 2 (VIN2LP, VIN2LN, VIN2RP, VIN2RN)
Maximum Differential
Input Signal Level
2.25 x
AVDD/5
VINDIFF(max)
0dB gain
0dB gain
Maximum Single-ended
Input Signal Level
1.1 x
AVDD/5
VINSE(max)
Single-
ended or
Differential
(Inverting)
10
kΩ
Input impedance
ZIN
Differential
(Non-
inverting)
120
65
kΩ
Common Mode Rejection
Ratio
20Hz to
20kHz
CMRR
dB
0
10
20
30
Microphone Preamp Gain
Options
dB
Minimum PGA Gain
Setting
-12
+12
0.5
dB
dB
dB
Maximum PGA Gain
Setting
PGA Gain Step Size
Guaranteed monotonic
PP, April 2011, Rev 3.2
14
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
