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參數(shù)資料
| 型號： | AD1983 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | Codec |
| 英文描述： | HD Audio SoundMAX Codec |
| 中文描述： | 高清音頻SoundMAX編解碼器 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 231K |
| 代理商： | AD1983 |
AD1983
JACK PRESENCE DETECTION
The AD1983 uses one jack sense line for presence detection on
up to four external jacks. This enables software to determine if
there is a device plugged into a jack; then, the AD1983 sensing
engine can determine what type of device it is. Jack presence is
detected using a resistor tree arrangement outlined in the HD
Audio specification. Up to four jacks can be sensed on a single
sense line by using a different value resistor for each between
the sense line and ground (AV
SS
). Jacks must have normally-
open, isolated switches to use this method of jack presence
detection.
Rev. 0 | Page 14 of 16
For proper operation there must be a 2.67 kΩ 1% resistor
connected between SENSE_A and AV
DD
. For this configuration
R1 and C1 should be installed; R2 should not be installed
(see Figure 3).
The specific resistor values for each jack are shown in Table 13.
To ensure accurate detection, use 1% tolerance resistors for all
jack presence circuitry.
Table 13. Jack Sense Mapping
SENSE_A
Resistor (1%)
5.1 kΩ
10.0 kΩ
20.0 kΩ
39.2 kΩ
Name
Line Out
Line In
Microphone
Headphone Out
Port
D
C
B
A
Node ID
(Hex)
05
09
08
06
An alternate method reduces the current for sensing by
connecting a single 2.67 kΩ 1% resistor between the SENSE_A
and SENSE_SRC pins. For this configuration R1 and C1 are not
installed; however, R2 is installed (see Figure 3).
It is recommended that designers place circuitry for both
sensing methods and only install one of the two options.
SENSE_A/SRC_B
TO JACKS FOR
PORT A THROUGH PORT D
AD1983
C1
1μF
SENSE_SRC
AV
SS
22, 26
21
17, 29
9
AV
DD
AV
DD
R1
2.67k
, 1%, 1/8W
R2 (DNE)
2.67k
, 1%, 1/8W
0
Figure 3. Jack Presence Detection
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD1983JCPZ | HD Audio SoundMAX Codec |
| AD1983JCPZ-REEL | HD Audio SoundMAX Codec |
| AD1984 | High Definition Audio SoundMAX Codec |
| AD1984JCPZ | High Definition Audio SoundMAX Codec |
| AD1984JCPZ-REEL | High Definition Audio SoundMAX Codec |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD1983JCPZ | 制造商:AD 制造商全稱:Analog Devices 功能描述:HD Audio SoundMAX Codec |
| AD1983JCPZ-REEL | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| AD1984 | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Definition Audio SoundMAX Codec |
| AD1984A | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Definition Audio SoundMAX Codec |
| AD1984AJCPZ | 制造商:Analog Devices 功能描述: |
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