ad1988a Analog Devices, Inc., ad1988a Datasheet - Page 8

• Manufacturer Part Number: ad1988a
• Description: High Definition Audio Soundmax Codec
• Manufacturer: Analog Devices, Inc.

AD1988A/AD1988B
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 5. Pin Function Descriptions
Mnemonic
DV
GPIO_0/VOLUME
DV
DV
SDATA_OUT
BIT_CLK
SDATA_IN
DV
SYNC
RESET
PCBEEP
SENSE_A/SRC_B
PORT-E_L, PORT-E_R
PORT-F_L, PORT-F_R
CD_L, CD_R
CD_GND
PORT-B_L, PORT-B_R
GPIO_0/VOLUME
CORE
IO
SS
DD
SDATA_OUT
SDATA_IN
BIT_CLK
PCBEEP
DV
RESET
SYNC
DV
DV
DV
DV
CORE
DD
I/O
SS
SS
10
11
12
1
2
3
4
5
6
7
8
9
Figure 2. LFCSP_VQ Pin Configuration
PIN 1
INDICATOR
AD1988A/AD1988B
Pin
Number
1
2
3
4, 7
5
6
8
9
10
11
12
13
14, 15
16, 17
18, 20
19
21, 22
(Not to Scale)
TOP VIEW
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
I
I
I
I
I
I
I
I
I
Description
Filter Connection for Internal Core Voltage Regulator. This pin must be connected to filter
capacitors: 10 μF, 1.0 μF, and 0.1 μF connected in parallel between Pin 1 and DV
General-Purpose Input/Output Pin (Digital I/O). Digital signal used to control external circuitry.
Volume Control. When enabled, it can be used as an external volume control
Link Digital I/O Voltage Reference. 3.3 V (±10%).
Digital Supply Return (Ground).
Link Serial Data Output (Digital Interface). AD1988 input stream. Clocked on both edges of the
BIT_CLK.
Link Bit Clock (Digital Interface). 24.000 MHz serial data clock.
Link Serial Data Input (Digital Interface). AD1988 output stream. Clocked only on one edge of
BIT_CLK.
Digital Supply Voltage 3.3 V ± 10%. This is regulated down to 1.9 V on Pin 1 to supply the internal
digital core internal to the AD1988.
Link Frame Sync (Digital Interface). 48 kHz frame sync plus SDI stream IDs.
Link Reset (Digital Interface). AD1988 master hardware reset.
Monaural Input from System for PCBEEP. Line level input.
Jack Sense A to Jack Sense D Input/Sense B Drive.
Left and Right Rear Panel Stereo Mic In/C/LFE (Analog Input/Output).
Left and Right Rear Panel Stereo Mic In/Surround Rear (Analog Input/Output).
CD Audio Left Channel, CD Audio Right Channel.
CD Audio Analog Ground Reference (for Analog CD Input). Line level input only.
Front Panel Stereo Mic In/Front Panel Headphones. Analog input/output.
Input: line level input, supports microphones with MIC_BIAS and boost amplifiers.
Output: line level output.
Input: line level input, supports microphones with MIC_BIAS and boost amplifiers.
Output: line level output only.
Input: line level input, supports microphones with MIC Bias and boost amplifiers.
Output: line level output, capable of driving headphone load and power.
36
35
34
33
32
31
30
29
28
27
26
25
PORT-D_R
PORT-D_L
SENSE_B/SRC_A
MIC_BIAS_FILT
MIC_BIAS/EAPD-D
MIC_BIAS-E
MIC_BIAS-F
MIC_BIAS/EAPD-C
MIC_BIAS-B
VREF_FILT
AV
AV
SS
DD
Rev. 0 | Page 8 of 20
GPIO_0/VOLUME
SDATA_OUT
SDATA_IN
BIT_CLK
PCBEEP
DV
RESET
SYNC
DV
DV
DV
DV
CORE
DD
I/O
SS
SS
10
11
12
1
2
3
4
5
6
7
8
9
48 47 46 45 44 43 42 41 40 39 38 37
13 14 15 16 17 18 19 20 21 22 23 24
Figure 3. LFQP Pin Configuration
PIN 1
AD1988A/AD1988B
(Not to Scale)
TOP VIEW
SS
(Pin 4 and Pin 7).
36
34
28
35
33
32
31
30
29
27
26
25
PORT-D_R
PORT-D_L
SENSE_B/SRC_A
MIC_BIAS_FILT
MIC_BIAS/EAPD-D
MIC_BIAS-E
MIC_BIAS-F
MIC_BIAS/EAPD-C
MIC_BIAS-B
VREF_FILT
AV
AV
SS
DD