LM1865M National Semiconductor, LM1865M Datasheet - Page 3

• Manufacturer Part Number: LM1865M
• Description: IC ADVANCED FM IF SYSTEM SO20
• Manufacturer: National Semiconductor

Specifications of LM1865M

• Function: FM IF System
• Rf Type: FM
• Package / Case: 20-SOIC (0.300", 7.50mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *LM1865M

DYNAMIC CHARACTERISTICS f
Pin 13 Mute Stop Threshold Voltage
Amount of Muting (LM1965 Only)
Amount of Muting with Pin 13 and
Pin 16 Grounded
Narrow Band AGC Threshold
Wide Band AGC Threshold
Pin 18 Low Output Voltage
(LM1865 and LM1965 only)
Pin 18 High Output Voltage (LM2065 only)
Pin 8 Meter Output Voltage
Electrical Characteristics
position 2 unless indicated otherwise (Continued)
Note 1 Above T
Note 2 All data sheet specifications are for V
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
Test Circuit
A
Parameter
e
25 C derate based on T
MOD
J(max)
a
e
e
400 Hz f
12V may change slightly with supply
e
Test Circuit T
V14
S2 in Position 3
V13 where V16
S2 in Position 4 S1 in Position 1 V
S1 in Position 1
V14
Increase IF Input until I
Pin 20
V
Increase Signal to Pin 20 until I
V
V
V
V
V
150 C and
IF
IN
IN
IF
IF
IF
e
Pin 20
Pin 20
e
e
e
e
o
e
100 mVrms
10 V
300 V
3 mV
e
e
V9 S1 in Position 4
V9 V
30 mVrms
10 7 MHz Deviation
JA
e
e
e
A
IF
100 mV V
100 mV V
FIGURE 2
60 C W
e
e
25 C V
10 mV
3
Low
Conditions
AGC
IF
IF
a
e
e
e
e
100 mVrms
100 mVrms (See Note 6)
e
AGC
0 1 mA
12V S1 in position 2 S2 in position 1 and S3 in
g
IF
e
75 kHz (Continued)
e
0 1 mA
10 mV
Min
100
5
11 7
Typ
220
210
0 2
0 1
1 1
2 6
66
12
0
12V
Max
300
0 5
22
TL H 7509– 2
mVrms
Units
Vrms
mV
dB
dB
V
V
V
V
V