T4260-ILSH Atmel, T4260-ILSH Datasheet - Page 14

• Manufacturer Part Number: T4260-ILSH
• Description: IC AM/FM FRONT END W/PLL 44SSOP
• Manufacturer: Atmel

Specifications of T4260-ILSH

• Frequency: AM, FM
• Modulation Or Protocol: AM, FM
• Applications: AM/FM Radio Receiver
• Current - Receiving: 85mA
• 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Sensitivity: -
• Memory Size: -
• Data Rate - Maximum: -

10. Bus Control
10.1
10.2
14
IF-AGC
PD Test
T4260
The IF-AGC controls the level of the IF signal that is passed to the external ceramic filter and the
IF input (AM pin 35 or FM pin 36 and pin 34). In AM mode the time constant can be selected by
the external capacitors at pin 32 (IFAGCA1) and pin 10 (IFAGCA2) and in FM mode by an exter-
nal capacitor at pin 31 (IFAGCFM). In AM mode, the double pole (by the capacitors at pin 32 and
pin 10) allows a better harmonic distortion by a lower time constant.
The IF-AGC threshold can be controlled by setting bits 0 to 2 as given in
Table 10-1.
The IF-AGC ON/OFF can be controlled by bit 16 as given in
Table 10-2.
A special test mode for PD is implemented for final production test only. This mode is activated
by setting bit 3 = 1. This mode is not intended to be used by customer application. For normal
operation bit 3 has to be set to 0.
Table 10-3.
Pin 17 = AMLF output (standard)
109 dBµV
111 dBµV
113 dBµV
115 dBµV
117 dBµV
118 dBµV
119 dBµV
121 dBµV
IF-AGC
Pin 17 = PD Test mode
IF-AGC Threshold
IF-AGC
PD-Test Mode
IF-AGC ON/OFF
IF-AGC OFF
IF-AGC ON
PD TE/PD
B2
0
0
0
0
1
1
1
1
Table
B1
0
0
1
1
0
0
1
1
10-2.
B16
B3
0
1
0
1
Table
10-1.
4528N–AUDR–11/09
B0
0
1
0
1
0
1
0
1