AD1984BJCPZ Analog Devices Inc, AD1984BJCPZ Datasheet - Page 12

• Manufacturer Part Number: AD1984BJCPZ
• Description: IC CODEC HD AUDIO 4CH 48-LFCSP
• Manufacturer: Analog Devices Inc
• Series: SoundMAX®r
• Type: Audio Codec, HDr

Specifications of AD1984BJCPZ

• Data Interface: Serial
• Resolution (bits): 24 b
• Number Of Adcs / Dacs: 4 / 4
• Sigma Delta: No
• Voltage - Supply, Analog: 3.13 V ~ 3.46 V
• Voltage - Supply, Digital: 2.97 V ~ 3.63 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-VFQFN, CSP Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD1984B
DIGITAL MICROPHONE INTERFACE TIMING SPECIFICATIONS
The digital microphone interface can support one or two digital
microphones using two or three codec pins. Both uniplex (one
microphone per data pin) and multiplex (two microphones
sharing the same data pin) are supported. The timing for these
Table 5. Microphone Timing Parameters
Parameter
Timing Requirements
t
t
t
t
t
t
t
0
0
0
1
2
3
4
Description
DM_CLK (1.5 MHz) Period
DM_CLK (2.0 MHz) Period
DM_CLK (3.0 MHz) Period
DM_CLK Rise Time
DM_CLK Fall Time
Data Setup to DM_CLK Edge
Data Hold from DM_CLK Edge
DM_CLK
DM_CLK
DM_1/2
DM_2
Duty Cycle
Duty Cycle
Duty Cycle
Figure 4. DM_2 Uniplex Microphone Timing
Rev. 0 | Page 12 of 20 | February 2008
Figure 3. Uniplex Microphone Timing
t
t
3
3
t
t
0
0
DATA VALID
DATA VALID
Min
10
5
configurations is shown in
Figure
MHz, 2.0 MHz, or 3.0 MHz to suit quality and power
requirements.
t
t
4
4
5. The interface can generate a microphone clock at 1.5
Typ
667
50/50
500
50/50
333
50/50
t
t
1
1
Table 5
Max
5
5
and
t
t
2
2
Figure
3,
Figure 4
Unit
ns
%
ns
%
ns
%
ns
ns
ns
ns
and