WM8772_05 Datasheet, PDF (11/73 Pages) Wolfson Microelectronics plc – 24-bit, 192kHz 6-Channel Codec with Volume Control

Production Data
WM8772
Test Conditions
AVDD, VREFP = 5V, DVDD = 3.3V, AGND, VREFN = 0V, DGND = 0V, TA = +25^oC, fs = 48kHz, MCLK = 256fs, 32-pin TQFP
version unless otherwise stated. ADC/DAC in Slave Mode unless otherwise stated.
PARAMETER
SYMBOL TEST CONDITIONS
MIN
TYP
MAX
UNIT
ADC Performance
Input Signal Level (0dB)
Input resistance
2.0 x
Vrms
REFADC/5
20
kΩ
Input capacitance
10
pF
SNR (Note 1,2,4)
A-weighted, 0dB gain
80
100
dB
@ fs = 48kHz
SNR (Note 1,2,4)
A-weighted, 0dB gain
100
dB
@ fs = 96kHz
64 x OSR
SNR (Note 1,2,4)
A-weighted, 0dB gain
93
dB
@ fs = 48kHz, AVDD =
3.3V
SNR (Note 1,2,4)
A-weighted, 0dB gain
93
dB
@ fs = 96kHz, AVDD
= 3.3V
64 x OSR
Total Harmonic Distortion (THD)
kHz, 0dBFs
-80
dB
1kHz, -1dBFs
-82
dB
ADC Channel Separation
1kHz Input
90
dB
Mute Attenuation
1kHz Input, 0dB gain
90
dB
Power Supply Rejection Ratio
PSRR
1kHz 100mVpp
50
dB
20Hz to 20kHz
45
dB
100mVpp
Digital Logic Levels (CMOS Levels)
Input LOW level
VIL
Input HIGH level
VIH
Input leakage current
0.3 x DVDD
V
0.7 x DVDD
V
±0.2
±1
µA
Input capacitance
5
pF
Output LOW
VOL
Output HIGH
VOH
Analogue Reference Levels
IOL=1mA
IOH= -1mA
0.9 x DVDD
0.1 x DVDD
V
V
Reference voltage
Potential divider resistance
VVMID
VREFP/2 – VREFP/2 VREFP/2 +
V
50mV
50mV
RVMID
VREFP to VMID and
50
kΩ
VMID to VREFN
Supply Current
Analogue supply current
AVDD, VREFP = 5V
45
mA
Digital supply current
DVDD = 3.3V
16
mA
Notes:
1. Ratio of output level with 1kHz full scale input, to the output level with all zeros into the digital input, measured ‘A’
weighted.
2. All performance measurements done with 20kHz low pass filter, and where noted an A-weight filter. Failure to use
such a filter will result in higher THD+N and lower SNR and Dynamic Range readings than are found in the Electrical
Characteristics. The low pass filter removes out of band noise; although it is not audible it may affect dynamic
specification values.
3. VMID decoupled with 10uF and 0.1uF capacitors (smaller values may result in reduced performance).
w
PD Rev 4.2 October 2005
11