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STMicro has introduced the TDA7701, a miniature single-chip FM tuner for portable entertainment and computing processing equipment. The product features: ultra-compact CSP (chip size package), working in low current and low voltage state, low price, minimum requirements for peripherals, high performance stereo frequency, self-seeking base station, adjustment and so on, etc. .
The TDA7701 is mainly used in cellular phones, digital audio players, walkmans, CD players, and portable computers. The device has built-in I2C and SPI bus modes for control.
To meet the growing demands of portable devices, FM tuner offers low current and low voltage sources: 2.4 to 3.2V dc, 12 mA. At the same time, in order to improve its portability, the product uses a CX of 5×5mm TFBGA40, which can meet the frequent update requirements of cellular phones.
In addition, the chip simplifies configuration requirements for peripherals while reducing price. These advantages are derived from the low frequency IF filter selected by the built-in channel and the VCO (Voltage Controlled Oscillator) of the built-in voltage controlled varactor.
The key functional blocks embedded in the chip are self-seeking phase-locked loops, low noise amplifiers, and FM adaptive demodulators. The version to be developed is then expected to include the RDS (Wireless Data System) decoder and the module synchronizer.
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