WM8959
Pre-Production
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.
PARAMETER
TEST CONDITIONS
MIN
TYP MAX
UNIT
kΩ
Analogue Input Pin Impedances (LIN1, LIN2, LIN3, LIN4, RIN1, RIN2, RIN3, RIN4)
B1
PGA Input Resistance
LIN1, LIN3, RIN1 or RIN3
(PGA Gain = -16.5dB)
LIN1, LIN3, RIN1 or RIN3
(PGA Gain = 0dB)
57
33
2
Note: this will be seen in
parallel with the
resistance of other
enabled input paths
from the same pin
kΩ
LIN1, LIN3, RIN1 or RIN3
(PGA Gain = +30dB)
kΩ
LIN2, LIN4, RIN2 or RIN4
(Constant for all gains)
65
kΩ
B2
Line Input Resistance
LIN2 or RIN2 to INMIXL or
INMIXR (-12dB)
60
15
7.5
20
kΩ
kΩ
kΩ
kΩ
LIN2 or RIN2 to INMIXL or
INMIXR (0dB)
Note: this will be seen in
parallel with the
resistance of other
enabled input paths
from the same pin
LIN2 or RIN2 to INMIXL or
INMIXR (+6dB)
LIN2 or RIN2 to SPKMIX
(SPKATTN = 0dB)
LIN2 or RIN2 to SPKMIX
(SPKATTN = -12dB)
20
kΩ
LIN3 or RIN3 to LOMIX or
ROMIX (0dB)
20
kΩ
kΩ
LIN3 or RIN3 to LOMIX or
ROMIX (-21dB)
224
RXP and RXN via RXVOICE
to AINLMUX or AINRMUX
7.5
15
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
(Gain = +6dB)
RXP and RXN via RXVOICE
to AINLMUX or AINRMUX
(Gain = 0dB)
RXP and RXN via RXVOICE
to AINLMUX or AINRMUX
45
(Gain = -12dB)
RXP and RXN via RXVOICE
to AINLMUX and AINRMUX
3.8
7.5
25
(Gain = +6dB)
RXP and RXN via RXVOICE
to AINLMUX and AINRMUX
(Gain = 0dB)
RXP and RXN via RXVOICE
to AINLMUX and AINRMUX
(Gain = -12dB)
LIN4 to OUT3 or RIN4 to
OUT4 (Gain = -6dB)
20
20
kΩ
kΩ
LIN4 to OUT3 or RIN4 to
OUT4 (Gain = 0dB)
B3
Input Capacitance
All analogue input pins
10
pF
PP, May 2008, Rev 3.1
12
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
