BA1442A datasheet, PDF - EEWORLD Datasheet

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BA1442A: DescriptionAM radio / FM IF stereo system IC; CategoryAnalog mixed-signal IC Consumption circuit; File Size349KB，17 Pages; ManufacturerROHM Semiconductor; Websitehttps://www.rohm.com/; Environmental Compliance

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BA1442A Overview

AM radio / FM IF stereo system IC

BA1442A Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Parts packaging code	DIP
package instruction	DIP-20
Contacts	20
Reach Compliance Code	compli
Commercial integrated circuit types	AUDIO SINGLE CHIP RECEIVER
Demodulation type	AM/FM
harmonic distortion	0.1%
JESD-30 code	R-PDIP-T20
JESD-609 code	e3/e2
length	26.3 mm
Number of functions	1
Number of terminals	20
Maximum operating temperature	75 °C
Minimum operating temperature	-25 °C
Output voltage nominal (AM)	75 mV
Nominal output voltage (FM)	75 mV
Package body material	PLASTIC/EPOXY
encapsulated code	DIP
Package shape	RECTANGULAR
Package form	IN-LINE
Peak Reflow Temperature (Celsius)	260
Certification status	Not Qualified
Maximum seat height	4.35 mm
Signal-to-noise ratio Nom (FM)	70 dB
Maximum slew rate	18 mA
Maximum supply voltage (Vsup)	8 V
Minimum supply voltage (Vsup)	3.8 V
surface mount	NO
Temperature level	COMMERCIAL EXTENDED
Terminal surface	TIN/TIN COPPER
Terminal form	THROUGH-HOLE
Terminal pitch	2.54 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	10
width	7.62 mm
Base Number Matches	1

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Audio ICs

AM radio / FM IF stereo system IC

BA1442A

The BA1442A is an AM radio and FM IF stereo system IC developed for radio cassette players. The FM circuit is com-

prised of a differential IF amplifier, a double-balance type quadrature detector, and a PLL-type stereo MPX circuit. The

AM circuit is comprised of a local oscillator, a double-balanced mixer, an IF amplifier, a detector, and an AGC circuit.

FApplications

Radio cassette players

FFeatures

1) The “S” curve characteristic of the FM detector can

be used for upper heterodyne (“N” curve) operation.

2) Audio high cut and low cut can be used to improve the

AM fidelity.

3) A reference voltage supply is provided to ensure

good frequency stability in the shortwave bands.

4) Good FM stability.

5) Built-in damping resistor (3.3kΩ) for the quadrature

coil.

6) The FM MPX uses a Laser Locked Loop, making

adjustment of the VCO and addition of external

components unnecessary.

7) Built-in forced monaural function for the MPX (VCO

stops, LED off).

8) VCO of the MPX is switched off during AM opera-

tion.

9) The stereo indicator pin has a constant drive cur-

rent, and a current limiting resistor is not required.

10) Few external components required.

FAbsolute

maximum ratings (Ta = 25_C)

FRecommended

operating conditions (Ta = 25_C)

337

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