AD1846 Analog Devices, AD1846 Datasheet - Page 27

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AD1846

Manufacturer Part Number
AD1846
Description
Low Cost Parallel-port 16-bit Soundport Stereo Codec
Manufacturer
Analog Devices
Datasheet

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REV. A
INDEX
PRODUCT OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
ELECTRICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . 2
ORDERING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
PINOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
PIN DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
AUDIO FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . 9
CONTROL REGISTERS . . . . . . . . . . . . . . . . . . . . . . . . . . 11
DATA AND CONTROL TRANSFERS . . . . . . . . . . . . . . . 21
POWER UP AND RESET . . . . . . . . . . . . . . . . . . . . . . . . . 24
AUTOCALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
CHANGING SAMPLE RATES . . . . . . . . . . . . . . . . . . . . . 24
APPLICATIONS CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . 25
PACKAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Analog Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Analog Mixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Analog-to-Digital Datapath . . . . . . . . . . . . . . . . . . . . . . . . 9
Digital-to-Analog Datapath . . . . . . . . . . . . . . . . . . . . . . . . 9
Digital Mixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Analog Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Digital Data Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power Supplies and Voltage Reference . . . . . . . . . . . . . . . 10
Clocks and Sample Rates . . . . . . . . . . . . . . . . . . . . . . . . . 10
Control Register Architecture . . . . . . . . . . . . . . . . . . . . . . 11
Direct Control Register Definitions . . . . . . . . . . . . . . . . . 12
Indirect Control Register Definitions . . . . . . . . . . . . . . . . 14
Data Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Control and Programmed I/O (PIO) Transfers . . . . . . . . 21
Direct Memory Access (DMA) Transfers . . . . . . . . . . . . . 22
Single-Channel DMA . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
DMA Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
DMA Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
10
26
27
9
68-Lead Plastic Leaded Chip Carrier
0.954 (24.23)
0.950 (24.13)
Dimensions shown in inches and (mm).
0.995 (25.27)
0.885 (22.48)
IDENTIFIER
TOP VIEW
PIN 1
OUTLINE DIMENSIONS
SQ
SQ
P-68A
–27–
61
43
60
44
0.175 (4.45)
0.169 (4.29)
0.104 (2.64) TYP
0.050
(1.27)
TYP
0.029 (0.74)
0.027 (0.69)
0.019 (0.48)
0.017 (0.43)
0.925 (23.50)
0.895 (22.73)
PAGE
AD1846

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