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參數資料
| 型號： | LA1836M |
| 元件分類： | 接收器 |
| 英文描述： | AM/FM, AUDIO SINGLE CHIP RECEIVER, PDSO30 |
| 封裝： | MFP-30 |
| 文件頁數： | 10/13頁 |
| 文件大小： | 534K |
| 代理商： | LA1836M |
Continued from preceding page.
No. 4787-6/13
LA1836, 1836M
Pin No.
Function
Voltage
Internal equivalent circuit
Remarks
12
13
14
15
16
17
18
19
20
21
22
S-meter output, AM SD
sensitivity adjustment
AM narrow band CF
connection
Phase comparator low-
pass filter
(FM/AM switch)
Pilot detector low-pass
filter (forced mono)
(VCO stop)
Post-amplifier L output
and R output
Post-amplifier L input
and R input
MPX output, L output
and R output
MPX input
0.5 V (FM)
0 V (AM)
1.5 V
VCC – 1.4
(FM)
0 V (AM)
VCC – 1.0
VREG
3.5 V
2.9 V
The AM SD sensitivity can be adjusted with the
resistor between this pin and ground.
The AM SD sensitivity should be adjusted first,
since the FM SD sensitivity is affected by this
adjustment.
Recommended narrow band CF: BFU450C4N
(Murata)
AM mode selected when this pin is connected to
ground.
The circuit is forced to mono when a current of
50 A or larger flows from this pin.
Connecting this pin to ground stops the VCO.
Output impedance ro = 200
Pin 16: left output
Pin 17: right output
Inverting inputs: ri = 3.3 k
Pin 18: left input
Pin 19: right input
Output impedance ro = 3.3 k
Pin 20: left de-emphasis
Pin 21: right de-emphasis
Input impedance ri = 20 k
The low-band separation characteristics are
improved by increasing the value of the capacitor
connected between this pin and pin 24. However,
the impulse noise associated with AM/FM
switching will increase.
Continued on next page.
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