wm8987 Wolfson Microelectronics plc, wm8987 Datasheet - Page 8

• Manufacturer Part Number: wm8987
• Description: Stereo Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

WM8987L
w
Test Conditions
DCVDD = 1.5V, DBVDD = 3.3V, AVDD = HPVDD = 3.3V, T
ADCOSR = DACOSR = 1 (64 fs), 24-bit audio data unless otherwise stated.
PARAMETER
Signal to Noise Ratio
(A-weighted)
Analogue Reference Levels
Midrail Reference Voltage
Buffered Reference Voltage
Microphone Bias
Bias Voltage
Bias Current Source
Output Noise Voltage
Digital Input / Output
Input HIGH Level
Input LOW Level
Output HIGH Level
Output LOW Level
SYMBOL
V
I
VREF
VMID
MICBIAS
SNR
MICBIAS
V
V
V
Vn
V
OH
OL
IH
IL
AVDD=HPVDD =3.3V
TEST CONDITIONS
3mA load current
1K to 20kHz
I
I
OH
OL
= +1mA
= -1mA
A
= +25
o
C, 1kHz signal, fs = 48kHz, PGA gain = 0dB,
0.7×DBVDD
0.9×DBVDD
–5%
–3%
–3%
MIN
0.9×AVDD
AVDD/2
AVDD/2
TYP
98
15
0.3×DBVDD
0.1×DBVDD
PD Rev 4.0 August 2008
+ 5%
+3%
+3%
MAX
3
Production Data
nV/√Hz
UNIT
mA
dB
V
V
V
V
V
V
V
8