CA3189 Просмотр технического описания (PDF) - Intersil
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CA3189 Datasheet PDF : 8 Pages
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CA3189
TABLE 1. CA3189E FEATURES COMPARED TO CA3089E
FEATURES
Low Limiting Sensitivity (12µV Typ)
Low Distortion
Single-Coil Tuning Capability
Programmable Audio Level
S/N Mute
Deviation Mute
Flexible AFC
Programmable AGC Threshold and Voltage
Typical S + N/N > 70 dB
Meter Drive Voltage Depressed at Very Low Signal Levels
On-Channel Step Control Voltage
CA3189E
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Test Circuits
CA3089E
Yes
Yes
Yes
No
Yes
No
Yes
No
No
No
No
V+ = 12V
22µH
L
(NOTE
4)
C
8.2K
0.05µF 11
8
SIGNAL 0.01µF
INPUT
1
VOLTAGE
51
100
pF
9
3.9K 10
10µF
AFC 5K
7 OUT
0.02
µF
TO
PIN 13
47K
3
CA3189E
6C
0.01
12 (NOTE
µF
5
5)
2
13
0.01
1µF 470
16
15
µF
14
4 10
0.01
22K
µF
33K
10K
K
TUNING METER
150µA
FULL
SCALE
10µF
AUDIO
OUT
0.33µF
NOTES:
3. All resistance values are in ohms.
4. L tunes with 100pF (C) at 10.7MHz. Q0 (unloaded) ≅ 75 (TOKO No.
KACS K586HM or equivalent).
5. C = 0.01µF for 50µs deemphasis (Europe).
C = 0.015µF for 75µs deemphasis (USA).
FIGURE 1. TEST CIRCUIT FOR CA3189E USING A SINGLE-
TUNED DETECTOR COIL
3K
100
pF
C1
V+ = 12V
22µH C2
T (NOTE 7)
8.2K
0.05µF
11
8
SIGNAL 0.01µF
INPUT
1
VOLTAGE
51
100
pF
9
8.2K 10
10µF
7
AFC 5K
OUT
10µF
0.02
µF
TO
PIN 13
47K
3
CA3189E
6
0.01
µF
5
12
C
(NOTE 9)
2
13
0.01
1µF 470
16
15
µF
14
4 10
K
0.01
µF
33K
22K
10K
TUNING METER
150µA
FULL
SCALE
AUDIO
OUT
0.33µF
NOTES:
6. All resistance values are in ohms.
7. T: PRI. - Q0 (unloaded) ≅ 75 (tunes with 100pF (C1) 20↑ of 34e on
7/32” dia. form. SEC. - Q0 (unloaded) ≅ 75 (tunes with 100pF (C2)
20↑ of 34e on 7/32” dia. form. kQ (percent of critical coupling) ≅
70% (Adjusted for coil voltage (VC) = 150mV).
8. Above values permit proper operation of mute (squelch) circuit
“E” type slugs, spacing 4mm.
9. C = 0.01µF for 50µs deemphasis (Europe) C = 0.015µF for 75µs
deemphasis (USA).
FIGURE 2. TEST CIRCUIT FOR CA3189E USING A DOUBLE-
TUNED DETECTOR COIL
3
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