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WM8971LEFL/R 数据表(PDF) 8 Page - Wolfson Microelectronics plc

部件名 WM8971LEFL/R
功能描述  STEREO CODEC FOR PORTABLE AUDIO APPLLICATIONS
PDF  56 Pages
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制造商  WOLFSON [Wolfson Microelectronics plc]
网页  http://www.wolfsonmicro.com
标志 WOLFSON - Wolfson Microelectronics plc

WM8971LEFL/R 数据表(HTML) 8 Page - Wolfson Microelectronics plc

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WM8971L
Advanced Information
w
AI Rev 3.0 March 2004
8
Test Conditions
DCVDD = 1.5V, DBVDD = 3.3V, AVDD = HPVDD = 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
Headphone Output (LOUT1/ROUT1, using capacitors)
Output Power per channel
PO
Output power is very closely correlated with THD; see below.
HPVDD=1.8V, RL=32
Ω
PO=5mW
0.016
-76
HPVDD=1.8V, RL=16
Ω
PO=5mW
0.022
-73
HPVDD=3.3V, RL=32
Ω,
PO=20mW
0.013
-78
Total Harmonic Distortion
THD
HPVDD=3.3V, RL=16
Ω,
PO=20mW
0.018
-75
%
dB
HPVDD = 3.3V
92
96
Signal to Noise Ratio
(A-weighted)
SNR
HPVDD = 1.8V
96
dB
Speaker Output (LOUT2/ROUT2 with 8
Ω
Ω
Ω
Ω bridge tied load, ROUT2INV=1)
Output Power at 1% THD
PO
THD = 1%
400
mW (rms)
Abs. Max Power Output
POmax
500
mW (rms)
Total Harmonic Distortion
THD
Po=180mW, RL=8
Ω,
HPVDD=3.3V
-60
0.1
dB
%
Signal to Noise Ratio
(A-weighted)
SNR
HPVDD=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
HPDETECT (pin 23)
Input HIGH Level
VIH
0.7
×AVDD
V
Input LOW Level
VIL
0.3
×AVDD
V



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