参数资料
型号: LA1867NM
元件分类: 接收器
英文描述: AM/FM, AUDIO DEMODULATOR, PQFP44
封装: QIP-44
文件页数: 10/32页
文件大小: 1074K
代理商: LA1867NM
Usage Notes
1. AM/FM switching: Pin 31 (IF VCC)
This pin is shared with the IF VCC. When the FM IF is operated, the IC automatically switches to FM mode. (Note
that the switching reference voltage is 3.3 V.)
Figure 1
2. FM SD and SD adjustment
The FM SD and the IF counter buffer operate with the elements shown below.
The following conditions are required for FM SD operation.
V30 > VA:
The S-meter voltage must be higher than the regulator voltage.
V23 < 0.7 V (VBE): The Hall detector and band mute must not operate.
V29 = H:
A high level must be applied to pin 29 through a 100 kΩ resistance.
The following condition is required for IF buffer operation.
V19 = H:
A high level must be applied to pin 19 through a 51 kΩ resistance.
No. 4619-18/32
LA1867NM
Pin V31
Mode
8 V
FM
open
AM
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