WM8940GEFL/V Wolfson Microelectronics, WM8940GEFL/V Datasheet - Page 9

• Manufacturer Part Number: WM8940GEFL/V
• Description: Audio CODECs Mono CODEC with Speaker Driver
• Manufacturer: Wolfson Microelectronics

Specifications of WM8940GEFL/V

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-24
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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Production Data
AUX In to Headphone Output (SPKOUTP, SPKOUTN with 16R resistive load to GND) Bypass mode
Test Conditions
DCVDD = 1.8V, AVDD = DBVDD = 3.3V, SPKVDD =3.3V, T
stated.
PARAMETER
Digital to Analogue Converter (DAC) to MONO Output with 10kΩ / 50pF load and DACVOL 0dB
Full-scale output
Signal to Noise Ratio
Total Harmonic Distortion
Total Harmonic Distortion + Noise
Channel Separation
MICP and MICN input PGA to input boost stage into 10kΩ / 50pF load on SPKOUTP and SPKOUTP
INPPGAVOL, PGABOOST = 0dB
Full-scale output voltage, 0dB gain
Signal to Noise Ratio
Total Harmonic Distortion
Total Harmonic Distortion + Noise
Channel Separation
DAC to Speaker Output (SPKOUTP, SPKOUTN with 8Ω bridge tied load) Bypass mode
Output Power
Total Harmonic Distortion
Signal to Noise Ratio
Power Supply Rejection Ratio
(50Hz-22kHz)
Signal to Noise Ratio
Total Harmonic Distortion
Microphone Bias
Bias Voltage
Bias Current Source
Output Noise Voltage
Digital Input / Output
Input HIGH Level
Input LOW Level
Output HIGH Level
Output LOW Level
Input Capacitance
1
6
6
3
3
3
3
4
4
4
4
5
5
SYMBOL
THD+N
THD+N
SNR
THD
SNR
THD
THD
SNR
SNR
THD
PSRR
V
V
Po
V
V
OH
OL
IH
IL
for V
AVDD=SPKVDD=3.3V
AVDD=SPKVDD=3.3V
AVDD=SPKVDD=3.3V
AVDD=SPKVDD=3.3V
AVDD=SPKVDD=3.3V
AVDD=SPKVDD=3.3V
Po=350mW, RL = 8Ω
Po=20mW, RL = 16Ω
TEST CONDITIONS
DACVOL = 0dB
full-scale signal
full-scale signal
SPKVDD=3.3V
SPKVDD=3.3V
SPKVDD=3.3V
SPKVDD=3.3V
1kHz to 20kHz
MICBIAS
A
All digital pins
R
0dBFS input
0dBFS input
1kHz signal
MBVSEL=0
MBVSEL=1
A-weighted
A-weighted
A-weighted
A-weighted
L
= +25
I
I
OL
OH
= 8Ω BTL
Output power is closely correlated with THD see below
=1mA
-1mA
within +/-3%
o
C, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise
DBVDD
DBVDD
93.5
0.7×
0.9×
93
94
95
MIN
SPKVDD/3.3
0.65*AVDD
0.9*AVDD
AVDD/3.3
0.03
100
100
-80
-78
-70
-74
98
99
-90
-87
98
50
99
15
10
TYP
0.02
PD, Rev 4.2, April 2008
0.3×DBVDD
0.1xDBVDD
-75
-74
-85
-82
MAX
-60
-67
3
WM8940
nV/√Hz
dBFS
dBFS
dBFS
dBFS
V
V
mA
UNIT
dB
dB
dB
dB
dB
dB
dB
pF
V
V
V
V
V
V
rms
rms
dB
dB
%
%
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