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参数资料
| 型号： | LA1780M |
| 元件分类： | 调谐器 |
| 英文描述： | 2-BAND, AUDIO TUNER, PQFP64 |
| 封装： | QFP-64 |
| 文件页数： | 10/38页 |
| 文件大小： | 764K |
| 代理商： | LA1780M |
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No. 5724-18/38
LA1780M
Pin No.
Function
Description
Equivalent circuit
Pin 40 VCC
Pin 62
VCC
Continued from preceding page.
Continued on next page.
Input and output pin or the first
IF amplifier
Inverting amplifier
53
IF amplifier output
V56 = 2 V
56
IF amplifier input
Input impedance: RIN = 330
V53 = 5.3 V
Output impedance
ROUT = 330
The mixer coil connected to the
54
Mixer output: 130 A
pin 54 mixer output must be
49
Mixer input
wired to VCC (pin 40).
The pin 49 mixer input
impedance is 330
Pins 55 and 58 include built-in
DC cut capacitors.
The AGC on level is determined
by the values of the capacitors
C1 and C2.
55
W-AGC IN
Pin 55 functions as the SD
AM SD ADJ
sensitivity adjustment pin in
AM mode.
58
N-AGC IN
Muting attenuation
The output current I55 is 50 A,
adjustment pin
and V55 varies depending on the
value of the external resistor.
The SD function operates by
comparing V55 with the S-meter
voltage.
Signal meter
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LA1780MA-A-MPB-E | 制造商:ON Semiconductor 功能描述:ANALOG CAR RADIO TUNER - Trays 制造商:Rochester Electronics LLC 功能描述: 制造商:ON Semiconductor 功能描述:FTRAY - ANALOG CAR RADIO TUNER |
| LA1781M | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:For Car Radios Single-Chip Tuner IC |
| LA1781M_09 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:For Car Radios Single-Chip Tuner IC |
| LA1781MA-MPB-E | 功能描述:调谐器 RoHS:否 制造商:NXP Semiconductors 功能: 噪声系数: 工作电源电压: 最小工作温度: 最大工作温度: |
| LA1781MD-A-MPB-E | 制造商:ON Semiconductor 功能描述:ANALOG CAR RADIO TUNER - Trays |
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