AD1885JSTZ-REEL Analog Devices Inc, AD1885JSTZ-REEL Datasheet - Page 24

• Manufacturer Part Number: AD1885JSTZ-REEL
• Description: IC CODEC STEREO 16BIT 48LQFP
• Manufacturer: Analog Devices Inc
• Series: SoundMAX®r
• Type: Audio Codec '97r

Specifications of AD1885JSTZ-REEL

• 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: 3.15 V ~ 3.45 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Single Supply Voltage (typ): 3.3/5V
• Single Supply Voltage (min): 3.15/4.75V
• Single Supply Voltage (max): 3.45/5.25V
• Package Type: LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD1885
LINE_ OUT Jack
Although not shown, if a LINE_OUT jack is used and the jack sense functionality is desired, the LINE_OUT jack should be wired
in a similar configuration as shown above for the HP_OUT jack (preferably Figure 10). The LINE_OUT jack should normally
be connected to the JS0 input, in order to mute the MONO_OUT signal. 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.
APPLICATION CIRCUITS
CD-ROM CONNECTIONS
Typical CD-ROM drives generate 2 V rms output and require a voltage divider for compatibility with the Codec input (1 V rms
range). The recommended circuit is basically a group of divide-by-two voltage dividers as shown on Figure 12.
The CD_GND_REF pin is used to cancel differential ground noise from the CD-ROM. For optimum noise cancellation, this sec-
tion of the divider should have approximately half the impedance of the right and left channel section dividers.
LINE_IN, AUX AND VIDEO INPUT CONNECTIONS
Most of these audio sources also generate 2 V rms audio level and require a –6 dB input voltage divider to be compatible with the
Codec inputs. Figure 13 shows the recommended application circuit. For applications requiring EMC compliance, the EMC com-
ponents should be configured and selected to provide adequate RF immunity and emissions control.
LINE/AUX/VIDEO INPUT
J1
FROM CODEC HP_OUT_R (PIN 41)
FROM CODEC HP_OUT_L (PIN 39)
CD ROM AUDIO
HEADER FOR
TO CODEC JS1 (PIN 48)
(LGGR)
1
2
3
4
5
NOTE: LOCATE R1 AND C1 CLOSE TO CODEC.
L2 600Z
L1 600Z
1
2
3
4
COMPONENTS
EMC
C1
470pF
C2
470pF
VOLTAGE DIVIDER
JACK SENSE
VOLTAGE DIVIDER
+
+
MMBD914
D1
AC-COUPLING
AC-COUPLING
470pF
470pF
OPTIONAL EMC
COMPONENTS
C4
C5
L1 600Z
L2 600Z
TO CODEC CD_L INPUT
TO CODEC CD_GND_REF INPUT
TO CODEC CD_R INPUT
TO CODEC RIGHT CHANNEL INPUT
TO CODEC LEFT CHANNEL INPUT
1
2
3
4
5
J1
HEADPHONE OUT