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WM8972LEFL/R 数据表(PDF) 6 Page - Wolfson Microelectronics plc

部件名 WM8972LEFL/R
功能描述  MONO CODEC FOR PORTABLE AUDIO APPLICATIONS
PDF  49 Pages
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制造商  WOLFSON [Wolfson Microelectronics plc]
网页  http://www.wolfsonmicro.com
标志 WOLFSON - Wolfson Microelectronics plc

WM8972LEFL/R 数据表(HTML) 6 Page - Wolfson Microelectronics plc

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WM8972L
Preliminary Technical Data
w
PTD Rev 2.2 June 2004
6
ELECTRICAL CHARACTERISTICS
Test Conditions
DCVDD = 1.5V, DBVDD = 3.3V, AVDD = OPVDD = 3.3V, TA = +25
oC, 1kHz signal, fs = 48kHz, PGA gain = 0dB, 24-bit audio
data unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Analogue Inputs (LINPUT1, RINPUT1, LINPUT2, RINPUT2, LINPUT3, RINPUT3) to ADC out
AVDD = 3.3V
1.0
Full Scale Input Signal Level
(for ADC 0dB Input at 0dB Gain)
VINFS
AVDD = 1.8V
0.545
V rms
+/-INPUT1 to ADC,
PGA gain = 0dB
22
+/-INPUT1 to ADC,
PGA gain = +30dB
1.5
DC Measurement
16
Input Resistance
+/-INPUT1 unused
17
k
Ω
Input Capacitance
10
pF
AVDD = 3.3V
80
95
Signal to Noise Ratio
(A-weighted)
SNR
AVDD = 1.8V
90
dB
Dynamic Range
-60dBFs
90
95
dB
-1dBFs input,
AVDD = 3.3V
-82
0.008
-77
0.014
Total Harmonic Distortion
THD
-1dBFs input,
AVDD = 1.8V
-74
0.02
dB
%
Analogue Outputs (OUT+/-, MONOOUT)
0dB Full scale output voltage
AVDD/3.3
Vrms
1kHz, full scale signal
90
Mute attenuation
MONOOUT pin
81
dB
DAC to Line-Out (OUT+/- with 10k
Ω
Ω
Ω
Ω / 50pF load)
AVDD=3.3V
90
98
Signal to Noise Ratio
(A-weighted)
SNR
AVDD=1.8V
93
dB
AVDD=3.3V
-84
Total Harmonic Distortion
THD
AVDD=1.8V
-80
dB
Speaker Output (OUT +/- with 8
Ω
Ω
Ω
Ω bridge tied load, OUTINV=1)
Output Power
PO
Output power is very closely correlated with THD; see below.
Po=180mW, RL=8
Ω,
OPVDD=3.3V
-60
0.1
Total Harmonic Distortion
THD
Po=400mW, RL=8
Ω
OPVDD=3.3V
-36
1.6
dB
%
Signal to Noise Ratio
(A-weighted)
SNR
OPVDD=3.3V, RL=8
Ω
95
dB
Analogue Reference Levels
Midrail Reference Voltage
VMID
–3%
AVDD/2
+3%
V
Buffered Reference Voltage
VREF
–3%
AVDD/2
+3%
V
Microphone Bias
Bias Voltage
VMICBIAS
3mA load current
–5%
0.9
×AVDD
+ 5%
V
Bias Current Source
IMICBIAS
3
mA
Output Noise Voltage
Vn
1K to 20kHz
15
nV/
√Hz
Digital Input / Output
Input HIGH Level
VIH
0.7
×DBVDD
V
Input LOW Level
VIL
0.3
×DBVDD
V
Output HIGH Level
VOH
IOL=1mA
0.9
×DBVDD
V
Output LOW Level
VOL
IOH-1mA
0.1
×DBVDD
V



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