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WM8750LEFL/R 数据表(PDF) 7 Page - Wolfson Microelectronics plc

部件名 WM8750LEFL/R
功能描述  STEREO CODEC FOR PORTABLE AUDIO APPLICATIONS
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

WM8750LEFL/R 数据表(HTML) 7 Page - Wolfson Microelectronics plc

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WM8750L
PP Rev 1.77 May 2003
7
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, R
L=32Ω
PO=5mW
0.013
-78
HPVDD=1.8V, R
L=16
Ω
PO=5mW
0.013
-78
HPVDD=3.3V, R
L=32Ω,
PO=20mW
0.01
-80
Total Harmonic Distortion
THD
HPVDD=3.3V, R
L=16
Ω,
PO=20mW
0.01
-80
%
dB
HPVDD = 3.3V
90
Signal to Noise Ratio
(A-weighted)
SNR
HPVDD = 1.8V
90
dB
Speaker Output (LOUT2/ROUT2 with 8
: bridge tied load, ROUT2INV=1)
Output Power
PO
Output power is very closely correlated with THD; see below.
Po=180mW, RL=8
Ω,
HPVDD=3.3V
-50
0.3
Total Harmonic Distortion
THD
Po=400mW, R
L=8
Ω
HPVDD=3.3V
-40
1
dB
%
HPVDD=3.3V, R
L=8Ω
90
Signal to Noise Ratio
(A-weighted)
SNR
HPVDD=2.5V, R
L=8Ω
90
dB
Analogue Reference Levels
Midrail Reference Voltage
VMID
–3%
AVDD/2
+3%
V
Potential Divider Resistance
RVMID
50
k
Ω
Buffered Reference Voltage
VREF
–3%
AVDD/2
+3%
V
Microphone Bias
Bias Voltage
VMICBIAS
–3%
0.9
×AVDD
+ 3%
V
Bias Current Source
IMICBIAS
3
mA
Output Noise Voltage
Vn
1K to 20kHz
15
nV/
√Hz
Digital Input / Output
Input HIGH Level
V
IH
0.7
×DBVDD
V
Input LOW Level
V
IL
0.3
×DBVDD
V
Output HIGH Level
V
OH
I
OL=1mA
0.9
×DBVDD
V
Output LOW Level
V
OL
I
OH-1mA
0.1
×DBVDD
V
HPDETECT (pin 23)
Input HIGH Level
V
IH
0.7
×AVDD
V
Input LOW Level
V
IL
0.3
×AVDD
V



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