Pre-Production
WM8959
Test Conditions
DCVDD = 1.8V, DBVDD = 3.3V, AVDD = HPVDD = 3.3V, SPKVDD = 5V, TA = +25oC, 1kHz signal, fs = 48kHz,
PGA gain = 0dB, 24-bit audio data unless otherwise stated.
E7
SNR (A-weighted)
THD (PO=20mW)
THD+N (PO=20mW)
THD (PO=5mW)
DAC to
LOUT/OUT3 or
ROUT/OUT4,
RL=16Ω,
Fully Differential Headphone Outputs
99
-71
-69
-67
-65
-100
60
dB
dB
dB
dB
dB
dB
dB
dB
mV
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
AVDD=HPVDD=
3.3V
THD+N (PO=5mW)
Crosstalk (L/R)
AVDD PSRR (217Hz)
HPVDD PSRR (217Hz)
DC Offset at Load
SNR (A-weighted)
THD (PO=20mW)
THD+N (PO=20mW)
THD (PO=5mW)
85
5
DAC to
LOUT/OUT3 or
ROUT/OUT4,
RL=16Ω,
98
-70
-68
-66
-64
99
AVDD=HPVDD=
2.7V
THD+N (PO=5mW)
SNR (A-weighted)
THD (PO=20mW)
THD+N (PO=20mW)
THD (PO=5mW)
E8
DAC to LOUT or
ROUT Capless
(OUT3 or 4 as
pseudo GND),
RL=16Ω,
-73
-71
-69
-67
-45
45
16Ω Capless Headphone Outputs
AVDD=HPVDD=
THD+N (PO=5mW)
Crosstalk (L/R)
3.3V
AVDD PSRR (217Hz)
HPVDD PSRR (217Hz)
SNR (A-weighted)
THD (PO=20mW)
THD+N (PO=20mW)
THD (PO=5mW)
85
DAC to LOUT,
or ROUT
97
-70
-68
-67
-65
Capless (OUT3
or 4 as pseudo
GND), RL=16Ω,
AVDD=HPVDD=
2.7V
THD+N (PO=5mW)
E9
Minimum Headphone
Resistance
LOUT, ROUT,
OUT3, OUT4
15
Ω
E10
E11
SPKVDD Leakage
Current
SPKVDD=5.0V,
1
uA
SNR (A-weighted)
THD (PO=0.5W)
DAC to Speaker
Output (Direct)
93
-87
-85
-76
-74
75
dB
dB
dB
dB
dB
dB
AVDD=3.3V,
SPKVDD=5V,
class D, PO
controlled using
DAC volume,
ACGAIN=DCGA
IN=1.52
THD+N (PO=0.5W)
THD (PO=1.0W)
THD+N (PO=1.0W)
SPKVDD PSRR(217Hz)
SNR (A-weighted)
THD (PO=0.5W)
DAC to Speaker
Output (Direct)
97
-78
-76
-76
-74
75
dB
-70
-68
-66
-64
dB
dB
dB
dB
dB
mV
AVDD=3.3V,
SPKVDD=5V,
class AB, PO
controlled using
DAC volume
THD+N (PO=0.5W)
THD (PO=1.0W)
THD+N (PO=1.0W)
SPKVDD PSRR(217Hz)
DC Offset at Load
5
PP, May 2008, Rev 3.1
15
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
