LA1231N

No.660-2/8

Specifications

Parameter

Symbol

Conditions

Ratings

Unit

Maximum supply voltage

Pin 11

16

V

Maximum input voltage

Pins 1-2

±1

Vp-p

Maximum supply current

Pin 11

40

mA

Maximum flow-in current

Pin 15

1

mA

Pin 16

1

mA

Maximum flow-out current

Pin 10

2

mA

Pin 12

2

mA

Pin 13

2

mA

Pin 15

2

mA

Allowable power dissipation

Pd max

650

mA

Operating temperature

Topr

–20 to +70

°C

Storage temperature

Tstg

–40 to +125

°C

Voltage regulator

IF amp/limiter

Guadrature

limiter

AFC/tuning

meter drive

Guadrature

det

Level

det

IF amp

stop

Signal meter

drive

Mute drive

Level

det

Level

det

Level

det

Level

det

DC

level

AF amp

Mute

control

Features

• High sensitivity on limiting : 18µV typ.

• Low distortion : 0.05% typ. determined by the linearity of phase characteristics in phase shifting circuit.

• High demodulation output : 330 mVrms typ.

• High S/N ratio : 78.5dB typ.

• Muting at detuning with little shock noise.

• Single meter drive output proportional with the input signal level dB.

• Detuning muting band having good symmetrics.

• Tuning meter driving output having wide swing width.

• Delay AGC drive output for front end.

• Constant voltage circuit is built-in : operation voltage=9 to 14V.

• Muting characteristics between adjacent stations are distinguished.

Equivalent Circuit Block Diagram