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WM8731 Datasheet(PDF) 8 Page - Wolfson Microelectronics plc

Part # WM8731
Description  Portable Internet Audion CODEC with Headphone Driver and Programmable Sample Rates
PDF  56 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8731 Datasheet(HTML) 8 Page - Wolfson Microelectronics plc

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WM8731
Advanced Information
WOLFSON MICROELECTRONICS LTD
AI Rev 2.0 February 2001
8
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD, HPVDD, DBVDD = 3.3V, AGND = 0V, DCVDD = 1.5V, DGND = 0V, TA = +25
oC, Slave Mode, fs = 48kHz, XTI/MCLK =
256fs unless otherwise stated.
PARAMETER
SYMBOL
TEST
CONDITIONS
MIN
TYP
MAX
UNIT
Digital Logic Levels (CMOS Levels)
Input LOW level
VIL
.3 x DBVDD
V
Input HIGH level
VIH
.7 x DBVDD
V
Output LOW
VOL
0.10 x
DBVDD
V
Output HIGH
VOH
.9 x DBVDD
V
Power On Reset Threshold (DCVDD)
DCVDD Threshold On -> Off
Vth
0.7
0.9
1.2
V
Hysteresis
VIH
0.3
V
DCVDD Threshold Off -> On
VOL
0.6
V
Analogue Reference Levels
Reference voltage (VMID)
VVMID
AVDD/2 –
50mV
AVDD/2
AVDD/2 +
50mV
V
Potential divider resistance
RVMID
40k
50k
60k
Ohms
Line Input to ADC
Input Signal Level (0dB)
VINLINE
1.0
AVDD/3.3
Vrms
SNR (Note 1,3)
A-weighted, 0dB gain
@ fs = 48kHz
93
97
dB
SNR (Note 1,3)
A-weighted, 0dB gain
@ fs = 96kHz
94
dB
SNR (Note 1,3)
A-weighted, 0dB gain
@ fs = 48kHz, AVDD =
2.7V
90
dB
Dynamic Range (Note 3)
DR
A-weighted, -60dB full
scale input
93
97
dB
THD
-1dB input, 0dB gain
-85
-80
dB
Power Supply Rejection Ratio
PSSR
1kHz 100mVpp
50
dB
20Hz to 20kHz
100mVpp
45
dB
ADC channel separation
1kHz input
90
dB
Programmable Gain Maximum
Programmable Gain Minimum
1kHz input
Rsource < 50 Ohms
+12
-34.5
dB
Programmable Gain Step Size
Guaranteed Monotonic
1.5
dB
Mute attenuation
0dB, 1kHz input
80
dB
0dB gain
40k
50k
Ohms
Input Resistance
RINLINE
12dB gain
10k
20k
Ohms
Input Capacitance
CINLINE
10
pF
Microphone Input to ADC @ 0dB Gain, fs = 8kHz (40k ohm Source Impedance. See Figure 11)
Input Signal Level (0dB)
VINMIC
1.0
AVDD/3.3
Vrms
SNR (Note 1,3)
A-weighted, 0dB gain
85
90
dB
Dynamic Range (Note 3)
DR
A-weighted, -60dB full
scale input
85
90
dB
THD
0dB input, 0dB gain
-80
-75
dB
Power Supply Rejection Ratio
PSSR
1kHz 100mVpp
50
dB
20Hz to 20kHz
100mVpp
45
dB



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