参数资料
型号: ATR4258-ILSH 19
厂商: Atmel
文件页数: 18/38页
文件大小: 0K
描述: IC RCVR AM/FM 3WIRE BUS 44SSOP
标准包装: 31
频率: 10.7MHz,450kHz
调制或协议: AM,FM
电流 - 接收: 20mA
数据接口: PCB,表面贴装
天线连接器: PCB,表面贴装
电源电压: 8 V ~ 10 V
工作温度: -40°C ~ 85°C
封装/外壳: 44-SSOP(0.291",7.40mm 宽)
供应商设备封装: 44-SSO
包装: 管件
其它名称: ATR4258-ILSH
ATR4258-ILSH-ND
4.24
Adjacent Channel Sensor
The adjacent channel sensor is active in FM mode only and measures the field strength outside
the reception band.
Figure 4-6.
Adjacent Channel Sensor
PIN 9 (Meter)
4.25
MPINT and ADJAC Reset
IF
S Meter
+
3 0 μ A
PIN 10 (ADJAC)
Bit 6 allows a resets of the multipath sensor and the adjacent channel sensor by connecting
pin 10 and pin 40 internally to ground and so the external capacitors can be discharged very
quickly.
Table 4-30.
Multipath and Adjacent Channel Reset
MPINT and Adjacent Channel (Pin 10 and Pin 40)
Normal mode
Connection to ground
Bit 6
0
1
4.26
Multipath Sensor
The multipath sensor is active in FM mode only and measures the disturbance due to multipath
reception. The multipath sensor detects drops in the field strength after the integrated band filter
by calculating the difference between an averaged maximum field strength and the current field
strength. The maximum depth of these drops is represented by the voltage of the peak detector
at pin 40 (MULTIP). The level of this voltage represents the degree of disturbance in the
received signal.
Figure 4-7.
Multipath Sensor
+
4 k Ω
PIN 40
18
ATR4258
4838B–AUDR–05/05
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