ATR4258-ILSH Atmel, ATR4258-ILSH Datasheet - Page 29

• Manufacturer Part Number: ATR4258-ILSH
• Description: IC AM/FM RECEIVER 44SSOP
• Manufacturer: Atmel

Specifications of ATR4258-ILSH

• Frequency: 10.7MHz, 450kHz
• Modulation Or Protocol: AM, FM
• Current - Receiving: 20mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 8 V ~ 10 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-SSOP
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Applications: -
• Sensitivity: -
• Memory Size: -
• Data Rate - Maximum: -
• Lead Free Status / Rohs Status: Compliant

9. Application Information
9.1
4838B–AUDR–05/05
AM Prescaler (Divider) Settings
The AM mixer is used for up conversion of the AM reception frequency to the IF frequency.
Therefore an AM prescaler is implemented to generate the necessary LO from the VCO fre-
quency. For the reception of the AM band different prescaler (divider) settings are possible.
Table 9-1
frequencies.
e.g.,
Table 9-1.
Note:
Divider (AM Prescaler)
divide by 10
Prescaler VCO Divider = 1 in this example.
divide by 2
divide by 3
divide by 4
divide by 5
divide by 6
divide by 7
divide by 8
divide by 9
gives an example for the AM prescaler (divider) settings and the reception
f
f
f
AM Prescaler (Divider) Settings and Reception Frequencies
VCO
IF
rec
= 10.7 MHz
=
= 98.2 MHz ... 124 MHz
----------------------------------- -
AM Prescaler
f
VCO
Minimum Reception Frequency
–
f
IF
20.033
[MHz]
13.85
5.667
3.329
1.575
0.211
38.4
8.94
0
Maximum Reception Frequency
30.633
[MHz]
9.967
7.014
3.078
51.3
20.3
14.1
4.8
1.7
ATR4258
29