GENERAL DESCRIPTION The TEA5591 is an integrated radio circuit which is designed for use in portable receivers and clock radios. The IC is also applicable to mains-fed AM an AM/FM receivers and car radio-receivers. The main advantage of this IC is its ability to operate over a wide range of supply voltages without loss of performance. The AM circuit incorporates a balanced mixer and a ‘one-pin’ oscillator, which operates in the 0.6 MHz to 30 MHz frequency range, with amplitude control. The circuit also includes an IF amplifier, a detector and an AGC circuit which controls the IF amplifier and the mixer. The FM circuit incorporates an RF amplifier, a balanced mixer and a ‘one-pin’ oscillator together with two AC coupled IF amplifiers (with distributed selectivity), a quadrature demodulator for the ceramic filter and internal AFC.
Features • DC AM/FM switch facility • Three internal separate stabilizers to enable operation over a wide range of supply voltages (1.8 to 15 V) • All pins (except pin 9) are ESD protected.
GENERAL DESCRIPTION The TEA5591A is a 24-pin integrated radio circuit, derived from the TEA5591 and is designed for use in AM/FM portable radios and clock radios. The TEA5591A differs from the TEA5591 in that it has: • Separate IF input pins for AM and FM • A split-up AM-IF stage (for distributed selectivity) • An LED driver indicator
The main advantage of the TEA5591A is its ability to operate over a wide range of supply voltages (1.8 to 15 V) without any loss of performance. The AM circuit incorporates: • A double balance mixer • A ‘one-pin’ oscillator with amplitude control operating in the 0.6 to 30 MHz frequency range • A split-up IF amplifier • A detector • An AGC circuit which controls the IF amplifier and mixer.
The FM circuit incorporates: • An RF input amplifier • A double balanced mixer • A ‘one-pin’ oscillator • Two IF amplifiers (for distributed selectivity) • A quadrature demodulator for a ceramic filter • Internal AFC
Features • LED AM/FM indicator • A DC AM/FM switch facility • Three separate stabilizers to enable operation over a wide range of supply voltages (1.8 to 15 V) • All pins (except pin 10) are ESD protected
GENERAL DESCRIPTION The TEA5594 is a 32-pin integrated radio circuit designed for use in all Electronic Tuned radio (ETR) sets especially those sets which have to fulfil the immunity requirements of CENELEC. The AM circuit incorporates: • A double balanced mixer • A ‘one-pin’ oscillator with amplitude control operating in the LW/MW frequency range • An IF amplifier and AM detector • An AGC circuit which controls the IF amplifier and mixer
The FM circuit incorporates: • A front-end (fulfilling the “out of band” CENELEC requirements) • Two IF amplifiers (for distributed selectivity) • A quadrature demodulator with a ceramic filter
The TEA5594 also contains: • Oscillator output buffers for AM and FM • A combined AM/FM IF counter output buffer with counter “enable” function • A field strength level detector for AM and FM • A soft mute circuit at FM, adjustable • An extra IF amplifier to split up IF filtering
Features • Low distortion on FM • AM/FM level/indicator circuit • A DC AM/FM switch facility • Supply voltages 2.7 to 15 V • A local distance switch facility (LOCAL-DX) at FM • All pins are ESD protected
DESCRIPTION The TEA5711 is a high performance Bimos IC for use in AM/FM stereo radios. All necessary functions are integrated: from AM and FM front-end to AM detector and FM stereo output stages.
FEATURES • Wide supply voltage range: 1.8 or 2.1 to 12 V • Low current consumption: 15 mA at AM, 16 mA at FM • High selectivity with distributed IF gain • LED driver for stereo indication • High input sensitivity: 1.6 mV/m (AM), 2.0 µV (FM) for 26 dB S/N • Good strong signal behaviour: 10 V/m at AM, 500 mV at FM • Low output distortion: 0.8% at AM, 0.3% at FM • Signal level output • Soft mute • Signal dependent stereo • Designed for simple and reliable printed-circuit board layout • High impedance MOSFET input on AM.
APPLICATIONS • Portable AM/FM stereo radio • Mini/midi receiver sets • Personal headphone radio.
Overview and Features CD1691CB is a single-chip FM/AM radio integrated circuit with high integration and few peripheral components. Its characteristics are as follows :
● Low quiescent current FM ICCQ= 5.3 mA AM ICCQ=3.4 mA typical value at VCC = 3V ● With FM/AM selector switch ● High output power PO= 450 mW typ. at VCC = 6V RL= 8 ● Built-in AFC variable capacitor ● Contains RF AGC IF AGC ● Tuning LED Drivers ● Electronic volume control FM mute ● Package SOP28