LM1865 datasheet(3/16 Pages) NSC

Teilenummer	LM1865

Bauteilbeschribung	Advanced FM IF System

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Hersteller	NSC [National Semiconductor (TI)]

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Electrical Characteristics Test Circuit TA e 25 C Va e 12V S1 in position 2 S2 in position 1 and S3 in

position 2 unless indicated otherwise (Continued)

Parameter

Conditions

Min

Typ

Max

Units

DYNAMIC CHARACTERISTICS

fMOD e 400 Hz fo e 107 MHz Deviation e g75 kHz (Continued)

Pin 13 MuteStop Threshold Voltage

V14 e V9 S1 in Position 4

220

mV

S2 in Position 3

V13 where V16

x Low

Amount of Muting (LM1965 Only)

S2 in Position 4 S1 in Position 1 VIF e 10 mV

66

dB

Amount of Muting with Pin 13 and

S1 in Position 1

0

dB

Pin 16 Grounded

V14 e V9 VIF e 10 mV

Narrow Band AGC Threshold

Increase IF Input until I AGC e 01 mA

100

210

300

m

Vrms

Pin 20 e 30 mVrms

Wide Band AGC Threshold

VIF e 100 mVrms

5

12

22

mVrms

Increase Signal to Pin 20 until IAGC e 01 mA

Pin 18 Low Output Voltage

VIN Pin 20 e 100 mV VIF e 100 mVrms

02

05

V

(LM1865 and LM1965 only)

Pin 18 High Output Voltage (LM2065 only)

VIN Pin 20 e 100 mV VIF e 100 mVrms (See Note 6)

117

V

Pin 8 Meter Output Voltage

VIF e 10 mV

01

V

VIF e 300 mV

11

V

VIF e 3 mV

26

V

Note 1

Above TA e 25 C derate based on TJ(max) e 150 C and iJA e 60 CW

Note 2

All data sheet specifications are for Va e 12V may change slightly with supply

Note 3

When the IF is preceded by 22 dB gain in the buffer excellent system sensitivity is achieved

Note 4

Measured with a notch at 60 Hz and 20 Hz to 100 kHz bandwidth

Note 5

FM modulate RF source with a 100 kHz audio signal and find what modulation level expressed as kHz deviation results in V16

x12V

Test Circuit

TLH7509 – 2

FIGURE 2

3

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