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參數(shù)資料
| 型號(hào)： | AD1885JST |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | AC’97 SoundMAX Codec |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | PLASTIC, LQFP-48 |
| 文件頁數(shù)： | 24/27頁 |
| 文件大小： | 291K |
| 代理商： | AD1885JST |
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AD1885
–24–
REV. 0
L1 600Z
L2 600Z
C4
470pF
OPTIONAL EMC
COMPONENTS
+
+
NOTE: LOCATE R1 AND C1 CLOSE TO CODEC.
JACK SENSE
TO CODEC JS1 (PIN 48)
FROM CODEC HP_OUT_R (PIN 41)
FROM CODEC HP_OUT_L (PIN 39)
HEADPHONE OUT
1
2
3
4
5
J1
C5
470pF
D1
MMBD914
Figure 11. Jack Sense Connection to HP_OUT Jack, Using Nonisolated Switch
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
μ
F. 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.
1
2
3
4
HEADER FOR
CD ROM AUDIO
(LGGR)
VOLTAGE DIVIDER
AC-COUPLING
TO CODEC CD_L INPUT
TO CODEC CD_GND_REF INPUT
TO CODEC CD_R INPUT
Figure 12. Typical CD-ROM Audio Connections
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.
VOLTAGE DIVIDER
AC-COUPLING
TO CODEC RIGHT CHANNEL INPUT
TO CODEC LEFT CHANNEL INPUT
LINE/AUX/VIDEO INPUT
1
2
3
4
5
J1
EMC
COMPONENTS
C1
470pF
C2
470pF
L2 600Z
L1 600Z
Figure 13. LINE_IN, AUX, and Video Input Connections
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD1886 | AC’97 SoundMAX Codec |
| AD1886A | IR Emitting Diode; Power Dissipation, Pd:50mW; Viewing Angle:45 ; Package/Case:SIP; Operating Temperature Range:-25 C to +85 C; Leaded Process Compatible:Yes RoHS Compliant: Yes |
| AD1886AJST | AC’97 SoundMAX Codec |
| AD1887JST | AC’97 SoundMAX Codec |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD1885JST-REEL | 制造商:Analog Devices 功能描述:Audio Codec 2ADC / 2DAC 16-Bit 48-Pin LQFP T/R 制造商:Rochester Electronics LLC 功能描述:AC97 VERSION 2.1 CODEC - Tape and Reel |
| AD1885JSTZ | 制造商:Analog Devices 功能描述:IC CODEC STEREO AC'97 48LQFP |
| AD1885JSTZ | 制造商:Analog Devices 功能描述:TV / Video IC |
| AD1885JSTZKL1 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| AD1885JSTZ-REEL | 制造商:Analog Devices 功能描述:Audio Codec 2ADC / 2DAC 16-Bit 48-Pin LQFP T/R |
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