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T4260

ATMEL Corporation
Part Number T4260
Manufacturer ATMEL Corporation
Description AM/FM Front End IC
Published Apr 17, 2010
Detailed Description www.DataSheet4U.com Features • • • • • • • • • • • • AM/FM Tuner Front End with Integrated PLL AM Up-conversion System ...
Datasheet PDF File T4260 PDF File

T4260
T4260


Overview
www.
DataSheet4U.
com Features • • • • • • • • • • • • AM/FM Tuner Front End with Integrated PLL AM Up-conversion System (AM-IF: 10.
7 MHz) FM Down-conversion System (FM-IF: 10.
7 MHz) IF Frequencies up to 25 MHz Fine-tuning Steps: AM = 1 kHz and FM = 50 kHz/25 kHz/12.
5 kHz Fast Fractional PLL (Lock Time < 1 ms) Inclusive Spurious Compensation Fast RF-AGC, Programmable in 1-dB Steps Fast IF-AGC, Programmable in 2-dB Steps Fast Frequency Change by 2 Programmable N-divider Two DACs for Automatic Tuner Alignment High S/N Ratio 3-wire Bus (Enable, Clock and Data; 3V and 5V Microcontrollers-compatible) AM/FM Front End IC T4260 1.
Description The T4260 is an advanced AM/FM receiver with integrated fast PLL as a single-chip solution based on Atmel®’s high-performance BICMOS II technology.
The low-impedance driver at the IF output is designed for the A/D of a digital IF.
The fast tuning concept realized in this part is based on patents held by Atmel and allows lock times less than 1 ms for a jump over the FM band with a step width of 12.
5 kHz.
The AM up-conversion and the FM down-conversion allows an economic filter concept.
An automatic tuner alignment is provided by built-in DACs for gain and offset compensation.
The frequency range of the IC covers the FM broadcasting band as well as the AM band.
The low current consumption helps the designers to achieve economic power consumption concepts and helps to keep the power dissipation in the tuner low.
4528M–AUDR–03/08 www.
DataSheet4U.
com Figure 1-1.
Block Diagram MXFMOB MXAMOA MXFMOA MXAMOB 43 44 39 40 IFINAM IFREF ININFM 34 35 36 IFAGCFM IFAGCA2 IFOUTA IFOUTB IFAGCA1 29 30 31 10 32 41 37 RF/IF SUPPLY 4 5 6 7 8 PLL SUPPLY AGC 15 26 28 VSPLL VRPLL GNDPLL 38 14 VST VRT GNDT VRVCO MXFMIA MXFMIB GNDRF MXAMIB MXAMIA RFAGCA1 RFAGCFM RFAGCA2 42 33 12 AGC DIV BUS 23 24 25 11 EN CLK DATA SW2/AGC SW1 DAC2 DAC1 AMAGCO FMAGCO AM 9 3 FM 13 SW-AMLF PD R DIV VCO 2 1 N DIV 22 OSCBUF 21 20 19 OSCE OSCB OSCGND 27 REFFREQ 16 F...


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