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Motorola
Motorola

MC1350 Datasheet

IF AMPLIFIER


MC1350 Datasheet Preview


Order this document by MC1350/D
Monolithic IF Amplifier
The MC1350 is an integrated circuit featuring wide range AGC for use as
an IF amplifier in radio and TV over an operating temperature range of 0° to
+75°C.
Power Gain: 50 dB Typ at 45 MHZ
Power Gain: 50 dB Typ at 58 MHZ
AGC Range: 60 dB Min, DC to 45 MHz
Nearly Constant Input & Output Admittance over the Entire AGC Range
Y21 Constant ( –3.0 dB) to 90 MHz
Low Reverse Transfer Admittance: < < 1.0 µmho Typ
12 V Operation, Single–Polarity Power Supply
MAXIMUM RATINGS (TA = +25°C, unless otherwise noted.)
Rating
Symbol
Value
Power Supply Voltage
V+ +18
Output Supply Voltage
AGC Supply Voltage
Differential Input Voltage
Power Dissipation (Package Limitation)
Plastic Package
Derate above 25°C
V1, V8
VAGC
Vin
PD
+18
V+
5.0
625
5.0
Operating Temperature Range
TA 0 to +75
Unit
Vdc
Vdc
Vdc
Vdc
mW
mW/°C
°C
MC1350
IF AMPLIFIER
SEMICONDUCTOR
TECHNICAL DATA
8
1
P SUFFIX
PLASTIC PACKAGE
CASE 626
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
8
1
ORDERING INFORMATION
Device
Operating
Temperature Range
Package
MC1350P
MC1350D
TA = 0° to +75°C
Plastic DIP
SO–8
Figure 1. Typical MC1350 Video IF Amplifier and MC1330 Low–Level Video Detector Circuit
0.002µF 470
0.001µF
4
0.002µF
32 1
45MHz
Input
50
MC1350
567 8
220
0.1µF
68pF
22 7
T1
12pF 8
T1
AGC 5
16
5
Turns
6
Turns
1
4
All windings #30 AWG tinned nylon acetate
wire tuned with Carbonyl E or J slugs.
3.3k
65
+18Vdc
18V
Auxiliary Video
Output
10V
4 Primary Video
and Sound Output
7.7V
MC1330AP
3.9k
0
3 33pF 2 1
3.9k
L1
AFT Output
3
16
10
Turns
3
16
L1 wound with #26 AWG tinned nylon
acetate wire tuned by distorting winding.
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 3
1
Page 1

MC1350
ELECTRICAL CHARACTERISTICS (V+ = +12 Vdc, TA = +25°C, unless otherwise noted.)
Characteristics
Symbol
Min
Typ
Max Unit
AGC Range, 45 MHz (5.0 V to 7.0 V) (Figure 1)
Power Gain (Pin 5 grounded via a 5.1 kresistor)
f = 58 MHz, BW = 4.5 MHz
See Figure 6(a)
f = 45 MHz, BW = 4.5 MHz
See Figure 6(a), (b)
f = 10.7 MHz, BW = 350 kHz
See Figure 7
f = 455 kHz, BW = 20 kHz
Maximum Differential Voltage Swing
0 dB AGC
–30 dB AGC
60 68
– dB
Ap dB
– 48 –
46 50
– 58 –
– 62 –
VO Vpp
– 20 –
– 8.0 –
Output Stage Current (Pins 1 and 8)
Total Supply Current (Pins 1, 2 and 8)
Power Dissipation
I1 + I8
IS
PD
5.6 – mA
14 17 mAdc
168 204 mW
DESIGN PARAMETERS, Typical Values (V+ = +12 Vdc, TA = +25°C, unless otherwise noted.)
Frequency
Parameter
Symbol 455 kHz 10.7 MHz 45 MHz
Single–Ended Input Admittance
g11 0.31 0.36 0.39
b11
0.022
0.50
2.30
Input Admittance Variations with AGC
(0 dB to 60 dB)
g11
b11
– 60
–0
Differential Output Admittance
g22 4.0 4.4 30
b22 3.0 110 390
Output Admittance Variations with AGC
(0 dB to 60 dB)
g22
b22
– 4.0
– 90
Reverse Transfer Admittance (Magnitude)
|y12|
< < 1.0 < < 1.0 < < 1.0
Forward Transfer Admittance
Magnitude
Angle (0 dB AGC)
Angle (–30 dB AGC)
|y21| 160 160 200
< y21 –5.0 –20 –80
< y21 –3.0 –18 –69
Single–Ended Input Capacitance
Differential Output Capacitance
Cin 7.2 7.2 7.4
CO 1.2 1.2 1.3
58 MHz
0.5
2.75
60
510
< < 1.0
180
–105
–90
7.6
1.6
Unit
mmho
µmho
µmho
µmho
µmho
mmho
Degrees
Degrees
pF
pF
Figure 2. Typical Gain Reduction
0
IAGC = 0.1 mA
20
40
60
80
4.0
(Figures 6 and 7)
IAGC = 0.2 mA
5.0 6.0
VAGC, SUPPLY VOLTAGE (V)
7.0
Figure 3. Noise Figure versus Gain Reduction
22
20
18 58 MHz
16
14 45 MHz
12 (Figure 6)
10
8.0
6.0
0 10 20 30 40
GAIN REDUCTION (dB)
2 MOTOROLA ANALOG IC DEVICE DATA
Page 2

MC1350
GENERAL OPERATING INFORMATION
The input amplifiers (Q1 and Q2) operate at constant
emitter currents so that input impedance remains
independent of AGC action. Input signals may be applied
single–ended or differentially (for ac) with identical results.
Terminals 4 and 6 may be driven from a transformer, but a dc
path from either terminal to ground is not permitted.
Figure 4. Circuit Schematic
AGC Amplifier Section
AGC
Input 70
5
470
Q3 Q4
470
Q5 Q6
2.0k
1.47k
5.53k 12.1
k
V+
2
(+)
8
V++
Output
1(–)
AGC action occurs as a result of an increasing voltage on
the base of Q4 and Q5 causing these transistors to conduct
more heavily thereby shunting signal current from the
interstage amplifiers Q3 and Q6. The output amplifiers are
supplied from an active current source to maintain constant
quiescent bias thereby holding output admittance nearly
constant. Collector voltage for the output amplifier must be
supplied through a center–tapped tuning coil to Pins 1 and 8.
The 12 V supply (V+) at Pin 2 may be used for this purpose,
but output admittance remains more nearly constant if a
separate 15 V supply (V+ +) is used, because the base
voltage on the output amplifier varies with AGC bias.
Figure 5. Frequency Response Curve
(45 MHz and 58 MHz)
4(–)
Inputs
6(+)
5.0k
Q1 66 Q2
1.4k
5.0k
1.1k 1.1k
5.6k
8.4k
1.9k
Q7 Q10
Q8 45 Q9
2.8k 200 200 2.8k
200
Input Amplifier Section
7
Gnd
Bias Supplies Output Amplifier Section
Scale: 1.0 MHz/cm
(a) 45 MHz and 58 MHz
Figure 6. Power Gain, AGC and Noise Figure Test Circuits
+12V (b) Alternate 45 MHz
Input
RS = 50
C1
0.001µF
0.001µF LP LP
C2
0.001
µF
L1 4 3
1.5–20pF
21
MC1350
LP
Output
T1 RL = 50
5.1k
VAGC *
56
78
0.001µF
0.001µF 0.001µF
*Connect to ground for maximum power gain test.
All power supply chokes (Lp), are self–resonant at input frequency. LP 20 k.
See Figure 5 for Frequency Response Curve.
L1 @ 45 MHz = 7 1/4 Turns on a 1/4coil form
L1 @ 58 MHz = 6 Turns on a 1/4coil form
T1 Primary Winding = 18 Turns on a 1/4coil form, center–tapped, #25 AWG
Secondary Winding = 2 Turns centered over Primary Winding @ 45 MHz
= 1 Turn @ 58 MHz
Slug = Carbonyl E or J
Input 0.68µH .001
RS = 50
VAGC
C1 4
5
5.1k
0.001
32
MC1350
67
0.001
1
8
+12V
L1
0.1
0.33µH
RL = 50
Output
5.1k C2
C3
Ferrite Core
L1 14 Turns 28 S.W.G.
C1 5–25 pF
C2 5–25 pF
C3 5–25 pF
45 MHz
L1 0.4 µH
Q 100
T1 1.3 µH to 3.4 µH Q 100 @ 2.0 µH
C1 50 pF to160 pF
C2 8.0 pF to 60 pF
58 MHz
0.3 µH
Q 100
1.2 µH to 3.8 µH Q 100 @ 2.0 µH
8.0 pF to 60 pF
3.0 pF to 35 pF
MOTOROLA ANALOG IC DEVICE DATA
3
Page 3

MC1350
Figure 7. Power Gain and AGC Test Circuit
(455 kHz and 10.7 MHz)
Input
RS = 50
L1
C2
C1
C3
4
3 21
MC1350
C5
VAGC *
5.1k 5
6 78
*Grounded for
maximum power gain.
C7 C6
12 V
C4
T1
Output
RS = 50
Component
Frequency
455 kHz
10.7 MHz
C1 – 80–450 pF
C2 – 5.0–80 pF
C3
0.05 µF
0.001 µF
C4
0.05 µF
0.05 µF
C5
0.001 µF
36 pF
C8
0.05 µF
0.05 µF
C7
0.05 µF
0.05 µF
L1 – 4.6 µF
T1
Note 1
Note 2
NOTES: 1. Primary: 120 µH (center–tapped)
[NOTES: 1. Qu = 140 at 455 kHz
NOTES: 1. Primary: Secondary turns ratio 13
NOTES: 2. Primary: 6.0 µH
NOTES: 2. Primary winding = 24 turns #36 AWG
NOTES: 2. (close–wound on 1/4dia. form)
NOTES: 2. Core = Carbonyl E or J
NOTES: 2. Secondary winding = 1–1/2 turns #36 AWG, 1/4dia.
NOTES: 2. (wound over center–tap)
Figure 8. Single–Ended Input Admittance
5.0
4.0
3.0 b11
2.0
1.0
0
10
g11
20 30 40 50
f, FREQUENCY (MHz)
70 100
Figure 10. Differential Output Admittance
1.0
(Single–ended output
admittance exhibits
0.8 twice these values.)
0.6 b22
0.4
0.2
0
10
g22
20 30 40 50
f, FREQUENCY (MHz)
70
100
Figure 9. Forward Transfer Admittance
500
Y21 (–30 dB gain)
400
Y21 (max gain)
300
0
–40
–80
200 –120
Y21
100 –160
0 –200
1.0 2.0 3.0 5.0 10 20 30 50 100
f, FREQUENCY (MHz)
Figure 11. Differential Output Voltage
8.0
7.0
6.0
V + + = 14 V
5.0
4.0
V + + = 12 V
3.0
2.0
1.0
0
0 10 20 30 40 50 60 70 80
GAIN REDUCTION (dB)
4 MOTOROLA ANALOG IC DEVICE DATA
Page 4
Part Number MC1350
Manufactur Motorola
Description IF AMPLIFIER
Total Page 6 Pages
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