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參數(shù)資料
| 型號： | LA2805 |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP24 |
| 封裝： | SDIP-24 |
| 文件頁數(shù)： | 6/10頁 |
| 文件大?。?/td> | 187K |
| 代理商： | LA2805 |
LA2805, 2805M
No.3248–5/10
Description of Equivalent Circuit Block Diagram
1) D0 to D2 (pins 24 to 22)
Each pin can be driven by the microcomputer output.
2) VREF
Provides Vref (pin 11) of approximately 3.8V.
3) Preamp
Amplifies the input signal at pins 3 to 6.
4) ALC
The ALC operates in the input range of –54dBs to approximately –10dBs. The ALC saturation output level is
500mVrms.
5) MUTE
Mutes the preamp output and power amp input. When pin 19 is at “H” level, the SW10 and SW11 open and
VOX output (pin 20) is at “L” level.
6) REC Amp
Amp used for recording.
7) V/I Recording Current
V/I conversion is made to draw the recording current for DC bias. The conversion gain and bias current can be
changed arbitraily by external resistors connected to pin 1.
8) Line Amp
Buffer amp for line output.
9) Beep Tone DET
A microcomputer is used to identify the beep tone signal or remote control signal included in the pin 21 output.
Zero-cross comparator for pin 10 input signal.
10)VOX
Detects the presence or absence of a call. Pin 10 input signal (V10) level detection.
V10
≥–24dBs................ Pin 20 “L”
11)Power Amp
Po=300mW (typ) at P.VCC=9V, RL=8
Mode Description
1) ICM REC (Incoming Message Rec.)
Incoming message recording.
Recording of dictation sent from the place where you have gone (remote-controlled from the place wher you
have gone).
2) 2WAY REC
Recording of both conversations while talking over the telephone.
Incoming message recording.
3) DICT REC
MICused dictation recording (recording of message to family or brief message contents).
4) 2-WAY BEEP
Speaker-output of alarm sound and incoming message recording and also line-output to your calling party.
Your calling party is made known that the incoming message is being recorded.
Line-output is down 6dB from line-output at other mode.
5) ICM OUT
Incoming message playback.
Listening to the incoming message through the telephone installed in the place where you have gone.
Incoming message line-out.
Recorded dictation playback.
6) ICM PLAY
Incoming message playback.
Recorded dictation playback.
7) OGM REC
1 (Outgoing Message Rec. 1)
Outgoing message recording (tape).
8) OGM Change
Change outgoing message by remote control from the place where you have gone.
9) OGM REC
2
Outgoing message recording (IC)
Continued on next page.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LA2900M | 2 CHANNEL, AUDIO AMPLIFIER, PDSO20 |
| LA2901V | 4 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| LA3160 | 2 CHANNEL, AUDIO PREAMPLIFIER, PSIP8 |
| LA3161 | 2 CHANNEL, AUDIO PREAMPLIFIER, PSIP8 |
| LA3210 | 1 CHANNEL, AUDIO PREAMPLIFIER, SIP9 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA2805M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Telephone Answering Machine Use |
| LA2806M | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Signal Processor and Power Amplifier IC for Telephone Answering Machines |
| LA282B-1-DGM-1-PF | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
| LA282B-1-DGM-PF | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LA282B-1-DGM-PF |
| LA282B-1-VY-1-PF | 制造商:LIGITEK 制造商全稱:LIGITEK electronics co., ltd. 功能描述:LED ARRAY |
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