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WM8991 Datasheet(PDF) 13 Page - Wolfson Microelectronics plc

Part # WM8991
Description  Mobile Multimedia CODEC with Dual-Mode Class AB/D Speaker Driver
PDF  174 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8991 Datasheet(HTML) 13 Page - Wolfson Microelectronics plc

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Pre-Production
WM8991
w
PP, May 2008, Rev 3.1
13
Test Conditions
DCVDD = 1.8V, DBVDD = 3.3V, AVDD = HPVDD = 3.3V, SPKVDD = 5V, TA = +25
oC, 1kHz signal, fs = 48kHz,
PGA gain = 0dB, 24-bit audio data unless otherwise stated.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Analogue Input Pin Impedances (LIN1, LIN2, LIN3, LIN4, RIN1, RIN2, RIN3, RIN4)
LIN1, LIN3, RIN1 or RIN3
(PGA Gain = -16.5dB)
57
k
Ω
LIN1, LIN3, RIN1 or RIN3
(PGA Gain = 0dB)
33
k
Ω
LIN1, LIN3, RIN1 or RIN3
(PGA Gain = +30dB)
2
k
Ω
B1
PGA Input Resistance
Note: this will be seen in
parallel with the
resistance of other
enabled input paths
from the same pin
LIN2, LIN4, RIN2 or RIN4
(Constant for all gains)
65
k
Ω
LIN2 or RIN2 to INMIXL or
INMIXR (-12dB)
60
k
Ω
LIN2 or RIN2 to INMIXL or
INMIXR (0dB)
15
k
Ω
LIN2 or RIN2 to INMIXL or
INMIXR (+6dB)
7.5
k
Ω
LIN2 or RIN2 to SPKMIX
(SPKATTN = 0dB)
20
k
Ω
LIN2 or RIN2 to SPKMIX
(SPKATTN = -12dB)
20
k
Ω
LIN3 or RIN3 to LOMIX or
ROMIX (0dB)
20
k
Ω
LIN3 or RIN3 to LOMIX or
ROMIX (-21dB)
224
k
Ω
RXP and RXN via RXVOICE
to AINLMUX or AINRMUX
(Gain = +6dB)
7.5
k
Ω
RXP and RXN via RXVOICE
to AINLMUX or AINRMUX
(Gain = 0dB)
15
k
Ω
RXP and RXN via RXVOICE
to AINLMUX or AINRMUX
(Gain = -12dB)
45
k
Ω
RXP and RXN via RXVOICE
to AINLMUX and AINRMUX
(Gain = +6dB)
3.8
k
Ω
RXP and RXN via RXVOICE
to AINLMUX and AINRMUX
(Gain = 0dB)
7.5
k
Ω
RXP and RXN via RXVOICE
to AINLMUX and AINRMUX
(Gain = -12dB)
25
k
Ω
LIN4 to OUT3 or RIN4 to
OUT4 (Gain = -6dB)
20
k
Ω
B2
Line Input Resistance
Note: this will be seen in
parallel with the
resistance of other
enabled input paths
from the same pin
LIN4 to OUT3 or RIN4 to
OUT4 (Gain = 0dB)
20
k
Ω
B3
Input Capacitance
All analogue input pins
10
pF



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