- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄32287 > LA1787M AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64 PDF資料下載
參數(shù)資料
| 型號： | LA1787M |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PQFP64 |
| 封裝： | 14 X 14 MM, QFP-64 |
| 文件頁數(shù)： | 5/54頁 |
| 文件大?。?/td> | 606K |
| 代理商： | LA1787M |
第1頁第2頁第3頁第4頁當(dāng)前第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁
No. 6655-13/54
LA1787M
Pin No.
Function
Description
Equivalent circuit
37
36
35
34
HOLE
DET
Quadrature
detector
Band
muting
IF limitter amplifier
A13577
0.1
F V
REF
R1
R2
VCC
C
390
1k
3pF
24
38
+
–
SD
Comparator
S-meter
R
SD ADJ
130
A
A13578
24
39
+
–
KEYED
AGC
Comparator
S-meter
A13579
6.4k
3.6k
1.3V
50pF
150
90
A
VCC
AM IF out
Continued from preceding page.
Continued on next page.
The resistor R1 determines the
width of the band muting function.
Increasing the value of R1
narrows the band.
Reducing the value of R1 widens
the band.
34
AGC
35
QD output
Null voltage
36
QD input
When tuned, the voltage between
37
VREF
pins 34 and 37, V34 – 37, will be 0 V.
The band muting function turns
on when |V34 – 37| ≥ 0.7 V.
V37 = 4.9 V
A 130-A current flows from pin
38
FM SD ADJ
38 and, in conjunction with the
external resistance R, determines
the comparison voltage.
The keyed AGC operates when
the voltage created by dividing the
pin 24 S-meter output voltage by
the 6.4 and 3.6 k
resistors
39
Keyed AGC
becomes lower than the voltage
AM stereo buffer
determined by the resistor
between pin 39 and ground.
This pin also is used as the AM
stereo IF buffer pin.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LA1810 | AM/FM, AUDIO SINGLE CHIP RECEIVER, PDIP24 |
| LA2232 | SPECIALTY CONSUMER CIRCUIT, DIP24 |
| LA2232M | SPECIALTY CONSUMER CIRCUIT, PDSO24 |
| LA2902V | 4 CHANNEL, AUDIO AMPLIFIER, PDSO24 |
| LA3361 | FM, AUDIO DEMODULATOR, PDIP16 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA1787M_09 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Single-Chip Tuner IC for Car Radios |
| LA1787M-MPB-E | 功能描述:調(diào)諧器 CAR RADIO TUNER RoHS:否 制造商:NXP Semiconductors 功能: 噪聲系數(shù): 工作電源電壓: 最小工作溫度: 最大工作溫度: |
| LA1787NM | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Single-Chip Car Radio System IC |
| LA1787NM_09 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Single-Chip Car Radio System IC |
| LA1787NM-MPB-E | 制造商:ON Semiconductor 功能描述:ANALOG CAR RADIO TUNER - Trays 制造商:ON Semiconductor 功能描述:FTRAY / ANALOG CAR RADIO TUNER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。