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WM8951L Datasheet(PDF) 6 Page - Wolfson Microelectronics plc

Part # WM8951L
Description  STEREO ADC WITH MICROPHONE INPUT AND CLOCK GENERATOR
PDF  42 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8951L Datasheet(HTML) 6 Page - Wolfson Microelectronics plc

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WM8951L
Production Data
w
PD Rev 4.0 May 2005
6
ELECTRICAL CHARACTERISTICS
Test Conditions
AVDD1, AVDD2, DBVDD = 3.3V, AGND1, AGND2 = 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
0.3 x DBVDD
V
Input HIGH level
VIH
0.7 x DBVDD
V
Output LOW
VOL
0.10 x
DBVDD
V
Output HIGH
VOH
0.9 x DBVDD
V
Power On Reset Threshold (DCVDD)
DCVDD Threshold On -> Off
Vth
0.9
V
Hysteresis
VIH
0.3
V
DCVDD Threshold Off -> On
VOL
0.6
V
Analogue Reference Levels
Reference voltage (VMID)
VVMID
AVDD1/2
V
Potential divider resistance
RVMID
50k
Ω
Line Input to ADC
Input Signal Level (0dB)
VINLINE
1.0
AVDD/3.3
Vrms
AVDD1/2= DBVDD=1.8V
DCVDD=1.5V
A-weighted, 0dB gain
@ fs = 48kHz
75
85
AVDD1/2= DBVDD=1.8V
DCVDD=1.5V
A-weighted, 0dB gain
@ fs = 96kHz
85
Signal to Noise Ratio
(Note 1,3)
Dynamic Range (Note 3)
SNR
DR
AVDD1/2= DBVDD=1.8V
DCVDD=1.5V
A-weighted, -60dB full
scale input
80
88
dB
dB
Total Harmonic Distortion
THD
AVDD1/2= DBVDD=1.8V
DCVDD=1.5V
-1dB input, 0dB gain
-76
-60
dB
Signal to Noise Ratio
(Note 1,3)
SNR
AVDD1/2= DBVDD=1.8V
DCVDD=1.5V
A-weighted, 0dB gain
@ fs = 48kHz
75
85
dB
1kHz, 100mVpp
50
Power Supply Rejection Ratio
PSRR
20Hz to 20kHz,
100mVpp
45
dB
ADC channel separation
1kHz input
90
dB
Programmable Gain
1kHz input
Rsource < 50 Ohms
-34.5
0
+12
dB
Programmable Gain Step Size
Guaranteed Monotonic
1.5
dB
Mute attenuation
0dB, 1kHz input
80
dB
0dB gain
20k
30k
Input Resistance
RINLINE
12dB gain
10k
15k
Ω
Input Capacitance
CINLINE
10
pF
Microphone Input to ADC @ 0dB Gain, fs = 48kHz (40k
Ω
Ω
Ω
Ω Source Impedance. See Figure 11)
Input Signal Level (0dB)
VINMIC
1.0
AVDD/3.3
Vrms



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