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參數(shù)資料
| 型號： | APA2030 |
| 廠商： | Anpec Electronics Corporation |
| 英文描述： | LJT 8C 8#16 SKT RECP |
| 中文描述： | 立體聲2.6W音頻放大器（增益控制） |
| 文件頁數(shù)： | 19/27頁 |
| 文件大小： | 746K |
| 代理商： | APA2030 |
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Copyright
ANPEC Electronics Corp.
Rev. A.2 - Apr., 2004
APA2030/2031
www.anpec.com.tw
19
To select the line inputs, set HP/LINE pin tied to
low level
To enable the headphone inputs, set HP/ LINE
pin tied to high level
Refer to the application circuit, the voltage divider of
100k
and 1k
sets the voltage at the HP/LINE pin
to be approximately 50mV when there are no head-
phones plugged into the system. This logic low volt-
age at the HP/LINE pin enables the APA2030 and
places it LINE input mode operation.
When a set of headphones is plugged into the system,
the contact pin of the headphone jack is disconnected
from the signal pin, interrupting the voltage divider set
up by resistors 100k
. Resistor 100k
then pulls-up
Differential Input Operation
APA2030/1 can accepted the differential input signal,
and it’s can improve the CMRR (Common Mode Re-
jection ratio). For example: when apply differential in-
put signals to APA2031, connect positive input sig-
nals to the IN+ (LIN+ and RIN+) of APA2031 and nega-
tive input signals to the IN- (LIN- and RIN-) of APA2031.
When input signals are single-end, just connect IN+
(LIN+ and RIN+) to ground via a capacitor.
Input Resistance, Ri
The APA2030/1 provides four gain setting decided by
GAIN0 and GAIN1 input ins in Differential mode and it
become 4.1dB fixed gain when SE mode is selected
(for APA2030). In table 1,internal resistors Ri and Rf
according to BTL operation set the gain for each au-
dio input of the APA2030/1.
Figure 2: SE/BTL input selection by phonejack plug
In Figure 2, input SE/BTL operates as follows:
When the phonejack plug is inserted, the 1k
resis-
tor is disconnected and the SE/BTL input is pulled
high and enables the SE mode. When the input goes
high level, the OUT- amplifier is shutdown causing
the speaker to mute. The OUT+ amplifier then drives
through the output capacitor (C
O
) into the headphone
jack.
When there is no headphone plugged into the system,
the contact pin of the headphone jack is connected
from the signal pin, the voltage divider set up by re-
sistors 100k
and 1k
. Resistor 1k
then pulls low
the SE/BTL pin, enabling the BTL function.
Input HP/LINE Operation (for APA2030 only)
APA2030 amplifier has two separate inputs for each of
the left and right stereo channels. An internal multi-
plexer selects which input will be connected to the
amplifier based on the state of the HP/LINE pin on
the IC.
GAIN0
GAIN1
Ri
Rf
SE/BTL
Av
0
0
90K
90K
0
6dB
0
1
69K
111K
0
10dB
1
0
42K
138K
0
15.6dB
1
1
25.7K
154.3K
0
21.6dB
X
X
69K
111K
1
4.1dB
BTL mode operation brings about the factor 2 in the
gain equation due to the inverting amplifier mirroring
the voltage swing across the load. The input resis-
tance has wide variation (+/-10%) caused by
manufacture.
I
nput Capacitor, Ci
In the typical application an input capacitor, Ci, is
required to allow the amplifier to bias the input signal
to the proper DC level for optimum operation. In this
case, Ci and the minimum input impedance Ri form a
high-pass filter with the corner frequency determined
in the follow equation:
Application Descriptions
Table 1: The close loop gain setting resistance Ri/Rf
the HP/LINE pin, enabling the headphone input
function.
Ring
1K
Headphone Jack
Sleeve
Control
Pin
Tip
Vdd
100K
SE/BTL
SE/BTL_Switch
100K
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| APA2030RI-TR | Circular Connector; No. of Contacts:8; Series:MS27656; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Socket; Circular Shell Style:Wall Mount Receptacle RoHS Compliant: No |
| APA2030RI-TRL | Circular Connector; No. of Contacts:8; Series:MS27656; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Socket; Circular Shell Style:Wall Mount Receptacle RoHS Compliant: No |
| APA2030RI-TU | Circular Connector; No. of Contacts:8; Series:MS27656; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Socket; Circular Shell Style:Wall Mount Receptacle RoHS Compliant: No |
| APA2030RI-TUL | Circular Connector; No. of Contacts:23; Series:MS27656; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Socket; Circular Shell Style:Wall Mount Receptacle RoHS Compliant: No |
| APA2030RI-TY | LJT 23C 21#20 2#16 SKT RECP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| APA2030_13 | 制造商:ANPEC 制造商全稱:Anpec Electronics Coropration 功能描述:Stereo 2.6W Audio Amplifier (With Gain Control) |
| APA2030QBI-TRG | 制造商:ANPEC 制造商全稱:Anpec Electronics Coropration 功能描述:Stereo 2.6W Audio Amplifier (With Gain Control) |
| APA2030RI-TR | 制造商:ANPEC 制造商全稱:Anpec Electronics Coropration 功能描述:Stereo 2.6W Audio Amplifier(With Gain Control) |
| APA2030RI-TRG | 制造商:ANPEC 制造商全稱:Anpec Electronics Coropration 功能描述:Stereo 2.6W Audio Amplifier (With Gain Control) |
| APA2030RI-TRL | 制造商:ANPEC 制造商全稱:Anpec Electronics Coropration 功能描述:Stereo 2.6W Audio Amplifier(With Gain Control) |
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