AD1848 データシートの表示（PDF） - Analog Devices
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AD1848 Datasheet PDF : 28 Pages
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AD1848K
Analog Signals
Pin Name PLCC
L_LINE
30
R_LINE
27
L_MIC
29
R_MIC
28
L_AUX1 39
R_AUX1 42
L_AUX2 38
R_AUX2 43
L_OUT
40
R_OUT
41
TQFP
21
18
20
19
30
33
29
34
31
32
I/O Description
I Left Line Input. Line level input for the left channel.
I Right Line Input. Line level input for the right channel.
I Left Microphone Input. Microphone input for the left channel. This signal
can be either line level or –20 dB from line level.
I Right Microphone Input. Microphone input for the right channel. This
signal can be either line level or –20 dB from line level.
I Left Auxiliary #1 Line Input
I Right Auxiliary #1 Line Input
I Left Auxiliary #2 Line Input
I Right Auxiliary #2 Line Input
O Left Line Level Output
O Right Line Level Output
Miscellaneous
Pin Name PLCC
XTAL1I
17
XTAL1O 18
XTAL2I
21
XTAL2O 22
PWRDWN 23
INT
57
XCTL1:O 56 & 58
VREF
32
VREF_F
L_FILT
R_FILT
N/C
33
31
26
46–52, 55
TQFP
8
9
12
13
14
44
43 & 45
23
24
22
17
37–39, 42
I/O Description
I 24.576 MHz Crystal #1 Input
O 24.576 MHz Crystal #1 Output
I 16.9344 MHz Crystal #2 Input
O 16.9344 MHz Crystal #2 Output
I Power-Down Signal. Active LO control places AD1848K in its lowest
power consumption mode. All sections of the AD1848K, including the
digital interface, are shut down and consume minimal power.
O Host Interrupt Pin. This signal is used to notify the host that the DMA
Current Count Register has underflowed.
O External Control. These signals reflect the current status of register bits
inside the AD1848K. They can be used for signaling or to control external
logic.
O Voltage Reference. Nominal 2.25 volt reference available for dc-coupling
and level-shifting. VREF should not be used where it will sink or source
current.
I Voltage Reference Filter. Voltage reference filter point for external
bypassing only.
I Left Channel Filter Input. This pin requires a 1.0 µF capacitor to analog
ground for proper operation.
I Right Channel Filter Input. This pin requires a 1.0 µF capacitor to analog
ground for proper operation.
No Connect. Do not connect.
Power Supplies
Pin Name PLCC
VCC
GNDA
VDD
GNDD
35 & 36
34 & 37
1, 7, 15, 19,
24, 45, 54
2, 8, 16, 20,
25, 44, 53, 64
TQFP
26 & 27
25 & 28
6, 10, 15, 36,
41, 56
7, 11, 16, 35,
40, 51, 63
I/O Description
I Analog Supply Voltage (+5 V)
I Analog Ground
I Digital Supply Voltage (+5 V)
I Digital Ground
–8–
REV. 0
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