Absolute Maximum Ratings

If MilitaryAerospace specified devices are required

please contact the National Semiconductor Sales

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Supply Voltage

18V

Power Dissipation (Note 3)

1500 mW

Operating Temperature Range

Operating Supply Voltage Range

a

Storage Temperature Range

b

Lead Temperature (Soldering 10 sec)

260 C

Parameter

Conditions

Min

Typ

Max

Units

Supply Current

Lamp ‘‘Off’’

21

30

mA

Lamp Driver Saturation

100 mA Lamp Current

13

18

V

Lamp Driver Leakage

10

nA

Pilot Level for Lamp ‘‘ON’’

Pin 11 Adjusted to 1900 kHz

15

20

mVrms

Pilot Level for Lamp ‘‘OFF’’

Pin 11 Adjusted to 1900 kHz

30

70

mVrms

Stereo Lamp Hysteresis

30

60

dB

Stereo Channel Separation

100 Hz (Note 2)

40

dB

1000 Hz (Note 2)

30

45

dB

10000 Hz (Note 2)

45

dB

Monaural Channel Unbalance

200 mVrms 1000 Hz Input

03

15

dB

Monaural Voltage Gain

200 mVrms 400 Hz Input

140

200

260

mVrms

Total Harmonic Distortion

500 mVrms 1000 Hz Input

04

10

%

Total Harmonic Distortion

500 mVrms 1000 Hz Input 1800A Only

01

03

%

Capture Range

25 mVrms of Pilot

g

20

g

6 0

Supply Ripple Rejection

200 mVrms of 200 Hz Ripple

35

45

dB

Dynamic Input Resistance

20

45

kX

Dynamic Output Resistance

900

1300

2000

X

SCA Rejection

(Note 4)

70

dB

Ultrasonic Freq Rejection

Combined 19 and 38 kHz Ref to Output

33

dB

Note 1

Note 2

The stereo input signal is made by summing 123 mVrms LEFT or RIGHT modulated signal with 25 mVrms of 19 kHz pilot tone measuring all voltages with

an average responding meter calibrated in rms The resulting waveform is about 800 mVp-p

Note 3

For operation in ambient temperatures above 25 C the device must be derated based on a 150 C maximum junction temperature and a thermal resistance

of 80 CW junction to ambient

Note 4

Measured with a stereo composite signal consistency of 80% stereo 10% pilot and 10% SCA as defined in the FCC Rules on Broadcasting

Note 5

VCO ‘‘OFF’’ curve represents the distortion attainable using good 19 kHz and 38 kHz filters

2