AD1981AJST Analog Devices Inc, AD1981AJST Datasheet - Page 20

• Manufacturer Part Number: AD1981AJST
• Description: IC CODEC STEREO MICPREAMP 48LQFP
• Manufacturer: Analog Devices Inc
• Series: SoundMAX®r
• Type: Audio Codec '97r

Specifications of AD1981AJST

• Data Interface: Serial
• Resolution (bits): 16, 20 b
• Number Of Adcs / Dacs: 4 / 2
• Sigma Delta: No
• Dynamic Range, Adcs / Dacs (db) Typ: 85 / 90
• Voltage - Supply, Analog: 4.65 V ~ 5.25 V
• Voltage - Supply, Digital: 3.15 V ~ 3.45 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD1981A
SPLNK
SPDZ
SPAL
INTS
CHEN
Reg Num Name
This register is not reset when the reset register (Register 00h) is written.
74h
Serial Configuration SLOT16 REGM2 REGM1 REGM0 X
SPDIF LINK: This bit enables the SPDIF to link with the DAC for data requesting.
0 = SPDIF and DAC are not linked.
1 = SPDIF and DAC are linked and receive same data requests (reset default).
SPDIF DACZ:
0 = Repeat last sample out the SPDIF stream if FIFO underruns (reset default).
1 = Forces “midscale” sample out the SPDIF stream if FIFO underruns.
SPDIF ADC Loop Around:
0 = SPDIF transmitter is connected to the AC-LINK stream (reset default).
1 = SPDIF transmitter is connected to the digital ADC stream, not the AC-LINK.
INTERRUPT MODE SELECT: This bits selects the JS interrupt implementation path.
0 = Bit 0 SLOT 12 (Modem Interrupt)
1 = Slot 6 Valid Bit (MIC ADC Interrupt)
Chain Enable:
This bit enables chaining of a slave CODEC SDATA_IN stream into the ID0 Pin (45).
0 = Disable Chaining (Reset Default)
1 = Enable Chaining into ID0 Pin
FMUTE = Output is forced to mute independent of the respective volume register setting.
ACTIVE = Output is not muted and its status is dependent on the respective volume register setting.
OUT = Nothing plugged into the jack and, therefore, the JS status is low (via the load resistor pull-down).
IN = Jack has plug inserted and therefore the JS status is high (via the CODEC JS internal pull-up).
REF JS1
HEADPHONE
D15
D14
JS0
LINE OUT
Table I. Jack Sense Mute Table – JSMT [2:0]
D13
Serial Configuration (Index 74h)
JSMT2
D12
JSMT1
D11 D10 D9
JSMT0
X
H.P.
OUT
X CHEN X X X INTS X SPAL SPDZ SPLNK 7001h
LINE
OUT
D8
D7 D6 D5 D4 D3 D2
MONO
OUT
NOTES
D1
D0
Default