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WM8956 Datasheet(PDF) 8 Page - Wolfson Microelectronics plc

Part # WM8956
Description  Hi-Fi DAC with 1W Stereo Class D Speaker Drivers and Headphone Drivers
PDF  80 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8956 Datasheet(HTML) 8 Page - Wolfson Microelectronics plc

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WM8956
Preliminary Technical Data
w
PTD, July 2007, Rev 2.1
8
Test Conditions
DCVDD = 1.8V, DBVDD = 3.3V, AVDD = SPKVDD1 = SPKVDD2 = 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 Outputs (HP_L, HP_R)
0dB Full scale output voltage
AVDD/3.3
Vrms
Mute attenuation
1kHz, full scale signal
86
dB
Channel Separation
L/RINPUT3 to headphone
outputs via bypass
110
dB
DAC to Line-Out (HP_L, HP_R, OUT3 with 10k
Ω / 50pF load)
AVDD=3.3V
99
Signal to Noise Ratio
(A-weighted)
SNR
AVDD=2.7V
98
dB
AVDD=3.3V
-85
Total Harmonic Distortion Plus
Noise
THD+N
AVDD=2.7V
-90
dB
AVDD=3.3V
-87
Total Harmonic Distortion
THD
AVDD=2.7V
-92
dB
Channel Separation
1kHz full scale signal
110
dB
Headphone Output (HP_L, HP_R, using capacitors unless otherwise specified)
Output Power per channel
PO
Output power is very closely correlated with THD; see below.
AVDD=2.7V, RL=32
Ω
PO=5mW
-78
0.013
AVDD=2.7V, RL=16
Ω
PO=5mW
-75
0.018
AVDD=3.3V, RL=32
Ω,
PO=20mW
-72
0.025
Total Harmonic Distortion +
Noise
THD+N
AVDD=3.3V, RL=16
Ω,
PO=20mW
-70
0.032
dB
%
AVDD = 3.3V
92
99
Signal to Noise Ratio
(A-weighted)
SNR
AVDD = 2.7V
98
dB
Speaker Outputs (SPK_LP, SPK_LN, SPK_RP, SPK_RN with 8
Ω bridge tied load)
Output Power
PO
Output power is very closely correlated with THD; see below
PO =200mW, RL = 8
Ω,
SPKVDD1=SPKVDD2
=3.3V; AVDD=3.3V
-78
0.013
dB
%
PO =320mW, RL = 8
Ω,
SPKVDD1=SPKVDD2
=3.3V; AVDD=3.3V
-72
0.025
dB
%
PO =500mW, RL = 8
Ω,
SPKVDD1=SPKVDD2
=5V; AVDD=3.3V
-75
0.018
dB
%
Total Harmonic Distortion + Noise
(DAC to speaker outputs)
THD+N
PO =1W, RL = 8
Ω,
SPKVDD1=SPKVDD2
=5V; AVDD=3.3V
-70
0.032
dB
%
PO =200mW, RL = 8
Ω,
SPKVDD1=SPKVDD2
=3.3V; AVDD=3.3V
-78
0.013
dB
%
PO =320mW, RL = 8
Ω,
SPKVDD1=SPKVDD2
=3.3V; AVDD=3.3V
-72
0.025
dB
%
PO =500mW, RL = 8
Ω,
SPKVDD1=SPKVDD2
=5V; AVDD=3.3V
-75
0.018
dB
%
Total Harmonic Distortion + Noise
(LINPUT3 and RINPUT3 to
speaker outputs)
THD+N
PO =1W, RL = 8
Ω,
SPKVDD1=SPKVDD2
=5V; AVDD=3.3V
-70
0.032
dB
%



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