参数资料
型号: ATR4258-ILQH 19
厂商: Atmel
文件页数: 17/38页
文件大小: 0K
描述: IC RCVR AM/FM 3WIRE BUS 44SSOP
产品变化通告: ATR425x Obsolescence 03/Apr/2012
标准包装: 2,000
频率: 10.7MHz
调制或协议: AM,FM
应用: AM/FM 无线电接收器
电流 - 接收: 45mA
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: 带卷 (TR)
其它名称: ATR4258-ILQH
ATR4258-ILQH-ND
ATR4258
Table 4-27.
Search Stop Detector Measurement Time
Time Window for Stop Signal
1 × 3.1969 ms
Bit 78
0
Bit 77
0
Bit 76
0
Bit 75
0
Bit 74
0
Bit 73
1
.....
63 × 3.1969 ms
1
1
1
1
1
1
Table 4-28.
Search Stop Window
Table 4-29.
Search Stop Window
±0.5 kHz
±1.1 kHz
±2.3 kHz
±4.8 kHz
±10 kHz
±20 kHz
±40 kHz
±80 kHz
Signals Available at Digital Output Pin 21
Bit 87
0
0
0
0
1
1
1
1
Bit 86
0
0
1
1
0
0
1
1
Bit 85
0
1
0
1
0
1
0
1
Bit 88
0
0
1
1
Bit 92
0 (AM)
1 (FM/WB)
0 (AM)
1 (FM/WB)
INT (Pin 21)
1
NOT MPINT
NOT STOP
NOT (STOP AND NOT MPINT)
Note:
MPINT = Multipath interrupt, Stop and MPINT signal are active low
Pin 35 (IFAGCH) is carried along with pin 36 (IFAGCL) to avoid crackles during a change of the
search stop mode to the AM reception mode.
4.23
Deviation Sensor
The deviation sensor is active in AM and FM/WB mode and measures the modulation of the sig-
nal. It is implemented as a peak detector of the low-pass-filtered MPX signal (see Figure 4-5 ).
The output voltage at pin 31 is proportional to the frequency deviation in FM/WB or the
modulation depth in AM respectively.
Figure 4-5.
Deviation Sensor
+
MPX
4 k Ω
PIN 3 1
25 k Ω
17
4838B–AUDR–05/05
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