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DAB/DMB Quad-band Mobile Tuner
Low-cost RF tuner for DAB / T-DMB, FM and GPS applications is highly integrated and does not need external SAW filter. Integrated with LNAs, RF / BB AGC, down conversion quadrature mixers, RF / IF power detectors and Received Signal Strength Indicator (RSSI), programmable multiple bandwidth channel filters, VCO, PLL, and crystal reference. An RF AGC controller with built-in algorithm was designed to optimize noise or linearity performance in various receiving environment. 3-wire SPI or I2C can be used for easy communication between base-band chip and RF tuner.
Features
- Highly Integrated single-chip RF tuner for ( VHF and L ) dual-band DAB/DMB, or FM and GPS receptions
- Low-IF architecture without the need of tracking or SAW filters
- Dual output modes for GPS: Low-IF analog outputs or digitized outputs
- Optional dual digital communication modes: I2C or SPI3 wire
- Integrated DCXO eliminates the need of bulky and expensive VC-TCXO
- Built-in algorithm of self controller RF AGC with internal sophisticated RF/BB and RSSI and RF AGC for linearity and sensitivity optimization
- Built-in algorithm of self controller IF AGC for GPS mode, also suitable for DAB/FM mode ( optional)
- Dual control modes for internal IF PGA gain settings: digital control by I2C or 3-wire SPI and analog voltage control generated by filtering PWM signal.
- On-chip automatic self-calibrations including AFC, Filter's bandwidth adjustment
- Digital controller power saving modes for best power efficiency
- Digitally adjustable baseband and IF output common mode voltage levels
- Integrated DC-offset cancellation circuitry
- Fractional-N synthesizer with fully integrated VCO's and partially integrated loop filter
- Complex channel select filter for sufficient image rejection
Deliverables
- Chip or KGD
Applications
- Digital Mobile TV
- Portable Media Players
- PDA and Laptops
- Portable receivers
- Automotive entertainment System
- GPS receiver
- Digital Radio Receiver
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