wm8770 Wolfson Microelectronics plc, wm8770 Datasheet - Page 7

• Manufacturer Part Number: wm8770
• Description: 24-bit, 192khz 8-channel Codec With Volume Control
• Manufacturer: Wolfson Microelectronics plc

Production Data
ELECTRICAL CHARACTERISTICS
w
Test Conditions
AVDD = 5V, DVDD = 3.3V, AGND = 0V, DGND = 0V, T
otherwise stated.
PARAMETER
Digital Logic Levels (TTL Levels)
Input LOW level
Input HIGH level
Output LOW
Output HIGH
Analogue Reference Levels
Reference voltage
Potential divider resistance
DAC Performance (Load = 10kΩ, 50pF)
0dBFs Full scale output voltage
SNR (Note 1,2)
SNR (Note 1,2)
Dynamic Range (Note 2)
Total Harmonic Distortion (THD)
DAC channel separation
DAC analogue Volume Gain
Step Size
DAC analogue Volume Gain
Range
Output Noise
DAC analogue Volume Mute
Attenuation
Power Supply Rejection Ratio
ADC Performance
Input Signal Level (0dB)
SNR (Note 1,2)
SNR (Note 1,2)
Dynamic Range (note 2)
Total Harmonic Distortion (THD)
ADC Channel Separation
Programmable Gain Step Size
Programmable Gain Range
Mute Attenuation
Power Supply Rejection Ratio
SYMBOL
PSRR
PSRR
V
R
DNR
V
V
V
V
VMID
VMID
OH
OL
IH
IL
A-weighted, 0dB gain
A-weighted, 0dB gain
1kHz Input, 0dB gain
1kHz Input, 0dB gain
TEST CONDITIONS
AVDD to VMID and
A-weighted, -60dB
A-weighted, -60dB
A-weighted output
full scale input
full scale input
@ fs = 48kHz
1kHz 100mVpp
@ fs = 48kHz
1kHz, -1dBFs
1kHz 100mVpp
VMID to AGND
@ fs = 96kHz
1kHz, 0dBFs
20Hz to 20kHz
@ fs = 96kHz
20Hz to 20kHz
A-weighted,
kHz, 0dBFs
A
A-weighted
1kHz Input
1kHz Input
1kHz Input
100mVpp
100mVpp
I
= +25
I
OL
OH
muted
=1mA
-1mA
o
C, fs = 48kHz, MCLK = 256fs, ADC/DAC in Slave Mode unless
0.9 x DVDD
100
100
MIN
2.0
-12 to +19
0 to -100
AVDD/2
AVDD/5
AVDD/5
1.0 x
1.0 x
-116
TYP
106
106
106
110
100
102
102
50k
-94
-89
-94
1.0
50
45
96
85
82
50
45
1
0.1 x DVDD
PD Rev 4.2 March 2008
-88
MAX
-90
0.8
WM8770
Vrms
Vrms
UNIT
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
Ω
V
V
V
V
V
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