ULN3841A

The ULN3841A is designed as one kind of AM signal processors which provides the AM signal processing function for an electronically tuned AM receiver (ETR). It include a balanced mixer, buffered local oscillator IF amplifier, AM detector, scan control detectors, and a switchable voltage regulator. The addition of a JFET matched to a whip antenna, RF tuning components, IF selectivity, and audio stages gives a complete AM radio which can be used in automative receivers.

ULN3841A has nine features. (1)Low noise figure. (2)Balanced mixer. (3)Buffered local oscillator. (4)Improved stop detector. (5)Wide band AGC. (6)Delayed AGC. (7)Narrow band FM output. (8)Low supply current. (9)7 to 16V operation. Those are all the main features.

Some absolute maximum ratings of ULN3841A have been concluded into several points as follow. (1)Its supply voltage would be 18V. (2)Its operating temperature range would be from -40°C to 85°C. (3)Its storage temperature range would be from -65°C to 150°C. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device.

Also some electrical characteristics of ULN3841A are concluded as follow. (1)Its minimum operating voltage would be typ 7.0V. (2)Its quiescent supply current would be typ 25mA and max 33mA. (3)Its sensitivity would be typ 6.0uV and max 10uV at Vout=50mV and would be typ 6.0uV and max 12uV at Vcc=11V. (4)Its usable sensitivity would be typ 6.0uV and max 10uV. (5)Its recovered audio would be min 173mV and typ 245mV and max 346mV. (6)Its total harmonic distortion would be typ 0.4% and max 3.0%. (7)Its oscillator output voltage would be min 150mV and typ 200mV and max 400mV. (8)Its stop output voltage would be min 4.3V and typ 4.6V at Vin=0V and it would be max 0.25V at Vin=1mV. (9)Its stop sensitivity would be min 27uV and typ 35uV and max 80uV. (10)Its stop bandwidth would be min 8.0KHz and typ 10.2KHz and max 13.5KHz. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!