AD1886AJST Analog Devices Inc, AD1886AJST Datasheet - Page 25

• Manufacturer Part Number: AD1886AJST
• Description: IC CODEC STEREO 16BIT 48LQFP
• Manufacturer: Analog Devices Inc
• Series: SoundMAX®r
• Type: Audio Codec '97r

Specifications of AD1886AJST

• Rohs Status: RoHS non-compliant
• Data Interface: Serial
• Resolution (bits): 16 b
• Number Of Adcs / Dacs: 2 / 2
• Sigma Delta: Yes
• Dynamic Range, Adcs / Dacs (db) Typ: 87 / 90
• Voltage - Supply, Analog: 4.75 V ~ 5.25 V
• Voltage - Supply, Digital: 3 V ~ 3.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP

CONNECTING THE JACK SENSE TO THE OUTPUT JACKS
Headphone Jack
The diagram on Figure 12 shows the preferred method to connect the Jack Sense line to the HP_OUT jack. This scheme requires a
stereo jack with a normally closed and isolated single switch. The switch holds the Jack Sense line low (grounded) until an audio plug
is inserted, causing the switch to open and the Jack Sense line to go high due to the codec internal pull-up.
The R2 and R3 resistors keep the electrolytic output caps properly polarized while the HP_OUT jack is not used.
Alternatively, when an audio output jack containing an isolated switch is not available, the circuit shown in Figure 13 can be used.
While the audio plug is out, this circuit keeps the Jack Sense line state low, by the pull-down effect of R2 (with no audio present) or
by tracking the lower peaks of the HP_OUT audio signal. Once an audio plug is inserted and the jack switch opens, the Jack Sense
line switches to a high state due to the codec internal pull-up, which quickly charges C1 to DV
The R2 and R3 resistors also keep the electrolytic output caps properly polarized while the HP_OUT jack is not used.
LINE OUT JACK
Although not shown, if a LINE_OUT jack is used and the Jack Sense functionality is desired with this jack, the LINE_OUT jack
should be wired in a similar configuration as shown above for the HP_OUT jack (preferably Figure 12). We recommend that in this
case the output coupling caps (C2, C3) be set to 2.2 µF. All other values should be kept the same.
FROM CODEC HP_OUT_R (PIN 41)
FROM CODEC HP_OUT_L (PIN 39)
FROM CODEC HP_OUT_R (PIN 41)
FROM CODEC HP_OUT_L (PIN 39)
TO CODEC JS (PIN 47)
TO CODEC JS (PIN 47)
NOTE: LOCATE R1 AND C1 CLOSE TO CODEC.
NOTE: LOCATE R1 CLOSE TO CODEC.
2k
R1
CERAMIC
220 F
220 F
+
+
2k
C3
R1
C2
2 F
JACK SENSE
C1
220 F
220 F
+
+
C2
C3
R2
10k
R3
10k
MMBD914
10k
10k
D1
R2
R3
JACK SENSE LINE
OPTIONAL EMC
C1
470pF
COMPONENTS
470pF
470pF
OPTIONAL EMC
COMPONENTS
C4
C5
C4
470pF
L1 600Z
L2 600Z
L1 600Z
L2 600Z
DD
5
4
3
2
1
.
HEADPHONE OUT
1
2
3
4
5
NC SWITCH
ISOLATED
J1
HEADPHONE OUT
AD1886A