ITD3020: Low-IF tuner IC for

ITD3020:  Low-IF tuner IC for dual-band DAB & FM

The ITD3020 is a highly integrated CMOS single chip low-IF single-conversion tuner IC for dual-band DAB (Digital audio broadcasting) and FM. It supports Eureka-147 DAB standard along with analog FM. It includes 2 LNAs, 2 RF PGAs, 2 image-rejection down-conversion mixers, a bandwidth adjustable low pass filter, an IF variable gain amplifier, a VCO and a fractional- N PLL, etc. On-chip low phase noise VCO along with high resolution fractional-N frequency synthesizer make in-band phase noise lower than that of any other conventional tuners.

The ITD3020 also includes several regulators, which make it possible to use single 2.85 V power supply. The ITD3020 exhibits ultra low power consumption such as 100 mW. Using small leadless 6 mm × 6 mm 40-Lead QFN package, the ITD3020 is the best solution for highly integrated multituner system and portable application where low power consumption is critical. It has an industry standard I²C serial bus interface. Primary application of the ITD3020 is dual-band DAB/FM mobile phones and the portable DAB/FM receiver.

Product Highlights

1. Single chip synthesized tuner for dual-band DAB and FM receiver
2. Low-IF single-conversion architecture which eliminates all SAW filters
3. Ultra low power consumption: 100mW

Applications

Dual-band DAB Mobile Phone

FM radio application

Low Power PDA, Mobile Phone

 Features

• Single chip synthesized tuner for dual-band DAB and FM receiver
• Low-IF single-conversion architecture which eliminates all SAW filters
• Covers whole band-III (174 ~ 245 MHz), L-band (1450 ~ 1592 MHz) and FM (88 ~ 108 MHz)
• Operating dynamic range : -102 ~ -10 dBm
• Ultra low power consumption:
  Band-III 100 mW
  L-band 160 mW
• Ideal for mobile DAB receiver, FM application
• I²C serial bus interface

• On-chip regulators for 2.85 V single supply
• On-chip fast switching fractional-N PLL
• On-chip low phase noise and wide frequency range VCO
• On-chip bandwidth-adjustable low pass filter
• Integrated IF variable gain amplifier for direct connection to digital demodulators
• Noise/Linearity optimization through internal RF RSSI and AGC loop
• Adjustable take-over point
• Minimal external components
• Fully compatible with dual-band DAB and FM
• Small 40-QFN package (6 mm × 6 mm)

Functional Block Diagram for ITD3020