T4260-IL Atmel, T4260-IL Datasheet - Page 15

• Manufacturer Part Number: T4260-IL
• Description: IC RECEIVER AM/FM FRONT 44-SSOP
• Manufacturer: Atmel

Specifications of T4260-IL

• 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: Contains lead / RoHS non-compliant
• Features: -
• Sensitivity: -
• Memory Size: -
• Data Rate - Maximum: -

Reception Mode
PLL
HCDEL
4528J–AUDR–11/04
Table 9. RF-AGC
There are two different operation modes, AM and FM, which are selected by means of
bit 17 and bit 145 according to Table 1 on page 11 and Table 2 on page 13. In AM mode
(bit 17 = 1), the AM mixer, the AM RF-AGC, the AM divider (prescaler) and the IF AM
amplifier (input at pin 35) are activated. In FM mode (bit 17 = 0), the FM mixer, the FM
RF-AGC and the IF FM amplifier (input at pin 36) are activated.
In AM or FM reception mode, bit 145 has to be set to the corresponding mode. The
buffer amplifier input can be connected to pin 16 (with the external FM loop filter) by
bit 145 = 0 and to pin 17 (with the external AM loopfilter) by bit 145 = 1.
The AM/FM function for the tuner part is controlled by bit 17 as given in Table 10.
Table 10. Tuner Operating Modes
The PLL can switch off by bit 4 = 0. In this case, the N-Divider input signal is internally
connected to ground.
Table 11. PLL Mode
There are two registers, HCDEL 1 (bits 20 and 21) and HCDEL 2 (bits 22 and 23), to
control the delay time of the high-current charge pump and to deactivate them. bit 18
(HCDEL) determines whether register HCDEL 1 or 2 is used.
Table 12. High-current Charge Pump Delay Time Register
RF-AGC AM
102 dB
103 dB
88 dB
89 dB
90 dB
91 dB
92 dB
...
HCDEL 1/2 Select Mode
PLL ON/OFF
PLL OFF
HCDEL 1
HCDEL 2
AM/FM
PLL ON
FM
AM
RF-AGC FM
105 dB
106 dB
91 dB
92 dB
93 dB
94 dB
95 dB
...
B15
...
0
0
0
0
0
1
1
B14
...
0
0
0
0
1
1
1
HCDEL (B18)
B17
B4
0
1
0
1
0
1
B13
...
0
0
1
1
0
1
1
T4260
B12
...
0
1
0
1
0
0
1
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