Details

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Below is the parameter table and instructions for the TDA8137, a high-performance stereo FM/AM radio tuner IC.

TDA8137 Parameter Table

Parameter	Symbol	Min	Typ	Max	Unit
Supply Voltage	Vcc	4.5	5.0	5.5	V
Standby Current	Istandby	-	20	-	渭A
Operating Current	Ioperating	10	20	30	mA
Frequency Range (FM)	fFM	87.5	-	108.0	MHz
Frequency Range (AM)	fAM	520	-	1610	kHz
Signal-to-Noise Ratio (FM)	SNR	-	65	-	dB
Signal-to-Noise Ratio (AM)	SNR	-	45	-	dB
Stereo Separation (FM)	SS	-	30	-	dB
Sensitivity (FM)	S	-	2.5	-	渭V
Sensitivity (AM)	S	-	10	-	渭V
Output Power (FM)	Pout	-	10	-	mW
Output Power (AM)	Pout	-	5	-	mW
Audio Output Impedance	Zout	-	4	-	惟
Temperature Range	Toper	-40	-	85	掳C

TDA8137 Instructions

1. Power Supply:

   • Connect the supply voltage (Vcc) to pin 1.
   • Ensure the supply voltage is within the range of 4.5V to 5.5V.
   • Connect the ground (GND) to pin 8.

2. Frequency Selection:

   • Use the frequency control input (pin 2) to set the desired FM or AM frequency.
   • For FM, the frequency range is 87.5 MHz to 108.0 MHz.
   • For AM, the frequency range is 520 kHz to 1610 kHz.

3. Audio Output:

   • Connect the left audio output (pin 5) and right audio output (pin 6) to your audio amplifier or speakers.
   • The audio output impedance is 4惟.

4. Standby Mode:

   • To put the TDA8137 into standby mode, apply a low signal to the standby control pin (pin 3).
   • In standby mode, the current consumption is approximately 20 渭A.

5. Mute Function:

   • Use the mute control pin (pin 4) to enable or disable the audio output.
   • Apply a high signal to mute the audio, and a low signal to unmute.

6. Stereo/Mono Switching:

   • The TDA8137 automatically switches between stereo and mono based on the received signal strength.
   • For manual control, use the stereo/mono control pin (pin 7).

7. Temperature Considerations:

   • The operating temperature range is from -40掳C to 85掳C.
   • Ensure proper heat dissipation if operating at high temperatures.

8. Capacitors and Inductors:

   • Use external capacitors and inductors as specified in the datasheet to match the antenna and filter the input signals.
   • Typical values are provided in the datasheet for optimal performance.

9. Interference and Noise Reduction:

   • Use shielding and proper grounding techniques to minimize interference and noise.
   • Place the TDA8137 away from sources of electromagnetic interference.

10. Testing and Troubleshooting:

    • Verify all connections and power supply voltages before testing.
    • Use a multimeter to check for correct voltages and currents.
    • If the device does not function as expected, refer to the troubleshooting section in the datasheet.

For more detailed information, including circuit diagrams and application notes, refer to the TDA8137 datasheet provided by the manufacturer.

(For reference only)