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TDA7000 FM Radio Receiver Circuit

tda7000 fm radio or receiver with lm386 amplifier

TDA7000 FM Radio Receiver Circuit Using Tuning Capacitor

GENERAL DESCRIPTION The TDA7000 is a monolithic integrated circuit for mono FM portable radios or receivers where a minimum on peripheral components is important (small dimensions and low costs).

The IC has an FLL (Frequency-Locked-Loop) system with an intermediate frequency of 70 kHz. The i.f. selectivity is obtained by active RC filters. The only function which needs alignment is the resonant circuit for the oscillator, thus selecting the reception frequency. Spurious reception is avoided by means of a mute circuit, which also eliminates too noisy input signals. Special precautions are taken to meet the radiation requirements.

The TDA7000 includes the following functions:

· R.F. input stage

· Mixer

· Local oscillator

· I.F. amplifier/limiter

· Phase demodulator

· Mute detector

· Mute switch

tda7000 fm radio receiver  circuit using Tuning Capacitor

This circuit is typical using with a  LM386 for the audio power amplifier.

With a minimum on peripheral components we can build a high performance and small FM radio receiver .

PARTS LIST
C1 0.22µF (224)
C2 22nF (223)
C3 10nF (103)
C4 27pF
C5 22pF
C6 3.3nF (332)
C7 180pF (181)
C8 330pF (331)
C9 3.3nF (332)
C10 150pF (151)
C11 82pF
C12 68pF
C13 220pF (221)
C14 100nF (104)
C15 330pF (331)
C16 220pF (221)
C17 1.5nF (152)
C18 470nF (474)
C19 100nF (104)
VC1 FM Tuning Capacitor (15-30pF)
R1 10kΩ
R2 22kΩ
R3 10kΩ
L1 5¾ (5.75) Turns of 23 swg enamelled copper wire close-wound on a 3mm diameter. (≈78nH)
L2 4¾ (4.75) Turns of 23 swg enamelled copper wire close-wound on a 3mm diameter. (≈70nH)
IC1 TDA7000
ANT Telescopic antenna or 1m wire
S1 Mute Switch (mute is disabled when switch is on.)

TDA7000 FM Receiver Coils

tda7000 fm radio Tuning coil L1 tda7000 fm radio antenna coil L2
L1:Tuning Coil, 5¾ (5.75) Turns of 23 swg enamelled copper wire close-wound on a 3mm diameter. L2: Antenna Coil, 4¾ (4.75) Turns of 23 swg enamelled copper wire close-wound on a 3mm diameter.

TDA7000 IC

TDA7000 FM Radio OR FM Receiver IC

TDA7000 QUICK REFERENCE DATA
Supply voltage range (pin 5) VP 2.7 to 10 V
Supply current at VP = 4.5 V IP typ. 8 mA
R.F. input frequency range frf 1.5 to 110 MHz
Sensitivity for -3 dB limiting

(e.m.f. voltage)

(source impedance: 75 Ω; mute disabled)

EMF typ. 1.5 mV
Signal handling (e.m.f. voltage)

(source impedance: 75 Ω)

EMF typ. 200 mV
A.F. output voltage at RL = 22 kΩ Vo typ. 75 mV

tda7000 Block diagram fm radio receiver

TDA7000 FM Radio Using Tuning Capacitor

tda7000 fm radio Receiver

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