wm8903 Wolfson Microelectronics plc, wm8903 Datasheet - Page 8

• Manufacturer Part Number: wm8903
• Description: Ultra Low Power Codec For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

WM8903
INPUT SIGNAL PATH
w
Single-ended stereo line record - IN1L+IN1R pins to ADC output
Test conditions:
L_MODE = R_MODE = 00b (Single ended)
LIN_VOL = RIN_VOL = 00000b (-1.5dB)
Total signal path gain = 4.45dB, incorporating 6dB single-ended to differential conversion gain
PARAMETER
Full Scale Input Signal Level (for
ADC 0dBFS).
Input Resistance
Input Capacitance
DC Offset
Signal to Noise Ratio
Total Harmonic Distortion
Total Harmonic Distortion + Noise
Channel Separation
Channel Level Matching
Power Supply Rejection Ratio
Pseudo-differential stereo line record - IN2L+IN3L / IN2R+IN3R pins to ADC output
Test conditions:
L_MODE = R_MODE = 01b (Differential Line)
LIN_VOL = RIN_VOL = 01111b (+4.2dB)
Total signal path gain = +4.20dB
PARAMETER
Line Input Full Scale Signal Level
applied to IN2L or IN2R (for ADC
0dBFS output)
IN3L, IN3R input range
Input Resistance
Input Capacitance
DC Offset
Signal to Noise Ratio
Total Harmonic Distortion
Total Harmonic Distortion + Noise
Common Mode Rejection Ratio
Channel Separation
Channel Level Matching
Power Supply Rejection Ratio
SYMBOL
SYMBOL
THD+N
THD+N
CMRR
PSRR
PSRR
SNR
SNR
THD
THD
R
C
R
C
in
in
in
in
10kHz signal, -5.45dBV
1kHz signal, -5.45dBV
1kHz signal, -5.45dBV
10kHz signal, -5.2dBV
20kHz, 100mV pk-pk
1kHz signal, -5.2dBV
1kHz signal, -5.2dBV
20kHz, 100mV pk-pk
TEST CONDITIONS
TEST CONDITIONS
1kHz, 100mV pk-pk
1kHz, 100mVpk-pk
1kHz, 100mVpk-pk
At ADC output with
ADC_HPF_ENA=0
At ADC output with
ADC_HPF_ENA=0
-5.45dBV input
-5.45dBV input
-5.2dBV input
-5.2dBV input
A-weighted
A-weighted
0.570
0.586
1.657
-4.88
-4.64
1.61
MIN
MIN
10
85
10
85
+/-100
11864
11864
0.600
0.617
1.745
-4.45
-4.20
1.70
+/-1
+/-1
TYP
TYP
-78
-76
-80
-78
12
10
47
91
85
80
60
40
12
10
47
92
60
85
80
60
40
PP, Rev 3.1, August 2009
0.630
0.648
1.833
-4.01
-3.77
MAX
1.78
MAX
-68
-66
-66
-64
Pre-Production
LSBs (24-bit)
LSBs (16-bit)
LSBs (24-bit)
LSBs (16-bit)
Vpk-pk
Vpk-pk
dBFS
dBFS
dBFS
dBFS
dBFS
dBFS
Vrms
Vrms
UNIT
UNIT
dBV
dBV
mV
kΩ
kΩ
pF
dB
dB
dB
pF
dB
dB
dB
dB
8