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MC1490 RF/IF/Audio Amplifier
The MC1490 is an integrated circuit featuring wide-range AGC for use in RF/IF amplifiers and audio amplifiers over the temperature range, -40 to +85C. * High Power Gain: 50 dB Typ at 10 MHz 45 dB Typ at 60 MHz 35 dB Typ at 100 MHz * Wide Range AGC: 60 dB Min, DC to 60 MHz
WIDEBAND AMPLIFIER WITH AGC
SEMICONDUCTOR TECHNICAL DATA
* *
6.0 V to 15 V Operation, Single Polarity Supply See MC1350D for Surface Mount
MAXIMUM RATINGS (TA = +25C, unless otherwise noted.)
Rating Power Supply Voltage AGC Supply Input Differential Voltage Operating Temperature Range Storage Temperature Range Junction Temperature Symbol VCC VAGC VID TA Tstg TJ Value +18 VCC 5.0 -40 to +85 -65 to +150 +150 Unit Vdc Vdc Vdc C C C P SUFFIX PLASTIC PACKAGE CASE 626
8 1
ORDERING INFORMATION
Device MC1490P Operating Temperature Range TA = - 40 to +85C
PIN CONNECTIONS
Package Plastic Output (-) VCC 1 2 -+ 3 4 (Top View) 8 Output (+)
7 Substrate Ground 6 5 Noninverting Input AGC Input
Representative Schematic Diagram
2 1.5 k VAGC 5 470 2.0 k 470 70 5.5 k 12.1 k 8 (+) Outputs (-) 1 45 66 6 5.0 k 5.0 k 5.6 k 1.1 k 1.1 k 8.4 k Substrate 1.9k 200 3 7 1.4 k 2.8 k 200 200 2.8 k VCC
GND Inverting Input
SCATTERING PARAMETERS (VCC = +12 Vdc, TA = +25C, Zo = 50 ) f = MHz Typ Parameter Input Reflection Coefficient Output Reflection Coefficient Forward Transmission Coefficient Reverse Transmission Coefficient (c) Motorola, Inc. 1996 Symbol |S11| 11 |S22| 22 |S21| 21 S12 12 30 0.95 -7.3 0.99 -3.0 16.8 128 0.00048 84.9 60 0.93 -16 0.98 -5.5 14.7 64.3 0.00092 79.2 Unit - deg - deg - deg - deg Rev 5
4 (-) (+) Inputs
Pins 3 and 7 should both be connected to circuit ground.
MOTOROLA ANALOG IC DEVICE DATA
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MC1490
ELECTRICAL CHARACTERISTICS (VCC = 12 Vdc, f = 60 MHz, BW = 1.0 MHz, TA = 25C)
Characteristic Power Supply Current Drain AGC Range (AGC) 5.0 V Min to 7.0 V Max Output Stage Current (Sum of Pins 1 and 8) Single-Ended Power Gain RS = RL = 50 Noise Figure RS = 50 Ohms Power Dissipation Figure - 19 - 19 19 - Symbol ICC MAGC IO GP NF PD Min - -60 4.0 40 - - Typ - - - - 6.0 168 Max 17 - 7.5 - - 204 Unit mA dB mA dB dB mW
Figure 1. Unneutralized Power Gain versus Frequency (Tuned Amplifier, See Figure 19)
AC , SINGLE-ENDED VOLTAGE GAIN (dB) 70 G P , UNNEUTRALIZED GAIN (dB) (SINGLE-ENDED OUTPUT) 60 50 40 30 20 10 0 10 20 50 f, FREQUENCY (MHZ) 100 200 VCC = 12 Vdc 50 40 30 20 10 0
Figure 2. Voltage Gain versus Frequency (Video Amplifier, See Figure 20)
RL = 1.0 k VCC = 12 Vdc
RL = 100
RL = 10 0.1 1.0 10 f, FREQUENCY (MHZ) 100 1000
Figure 3. Dynamic Range: Output Voltage versus Input Voltage (Video Amplifier, See Figure 20)
10 V O, OUTPUT VOLTAGE (V RMS) AV , SINGLE VOLTAGE GAIN (dB) 5.0 1.0 0.5 RL = 1.0 k 0.1 0.05 100 10 0.01 0.1 0.2 0.5 1.0 2.0 5.0 10 20 50 100 VCC = 12 Vdc V5(AGC) = 0 V f = 1.0 MHz 50
Figure 4. Voltage Gain versus Frequency (Video Amplifier, See Figure 20)
VCC = 6.3 Vdc 40 30 100 RL = 1.0 k
20 10 0 0.3
0.5 1.0
3.0 5.0
10
30
50
100
300
en, INPUT VOLTAGE (mVRMS)
f, FREQUENCY (MHZ)
2
MOTOROLA ANALOG IC DEVICE DATA
MC1490
Figure 5. Voltage Gain and Supply Current versus Supply Voltage (Video Amplifier, See Figure 20)
AV, SINGLE-ENDED VOLTAGE GAIN (dB) 45 40 35 30 25 20 15 10 5.0 0 2.0 4.0 6.0 8.0 10 12 14 16 VCC, SUPPLY VOLTAGE (V) ICC f = 1.0 MHz Rl = 1.0 AV 24 I C , SUPPLY CURRENT (mAdc) GR , GAIN REDUCTION (dB) 21 18 15 12 9.0 6.0 3.0 0 0 10 20 30 40 50 60 70 80 0 3.0 6.0 9.0 12 15 18 21 24 27 30 VR(AGC), AGC VOLTAGE (Vdc) RAGC = 0 RAGC = 5.6 k
RAGC = 100 k VR(AGC) RAGC 5 MC1490P
Figure 6. Typical Gain Reduction versus AGC Voltage
Figure 7. Typical Gain Reduction versus AGC Current
0 GR , GAIN REDUCTION (dB) 10 G p ,POWER GAIN (dB) 20 30 40 50 60 70 80 -40 -20 0 20 40 60 80 100 120 140 160 IAGC AGC CURRENT (A) 100 < RAGC < 100 k
Figure 8. Fixed Tuned Power Gain Reduction versus Temperature (See Test Circuit, Figure 19)
50 40 30 20 10 0 -10 -20 5.0 5.2 VCC = 12 Vdc f = 60 MHz RAGC = 5.6 k 5.4 5.6 5.8 6.0 6.2 6.4 +75C -55C 0C +25C
+125C 6.6 6.8 7.0
VR(AGC), AGC VOLTAGE (Vdc)
Figure 9. Power Gain versus Supply Voltage (See Test Circuit, Figure 19)
80 70 Gp , POWER GAIN (dB) 60 50 40 30 20 10 0 0 2.0 4.0 6.0 8.0 10 12 14 16 VCC, POWER SUPPLY VOLTAGE (V) GP NF, NOISE FIGURE (dB) f = 60 MHz 10 9.0 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0 15
Figure 10. Noise Figure versus Frequency
RS Optimized for minimum NF
20
25
30 35 40
50
60 70 80 90 100
150
f, FREQUENCY (MHz)
MOTOROLA ANALOG IC DEVICE DATA
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MC1490
Figure 11. Noise Figure versus Source Resistance
20 18 NF, NOISE FIGURE (dB) 16 14 12 10 8.0 6.0 4.0 2.0 0 100 200 400 600 1.0 k 2.0 k 4.0 k 10 k RS, SOURCE RESISTANCE () f = 30 MHz f = 105 MHz f = 60 MHz VCC = 12 Vdc NOISE FIGURE (dB) 40 35 30 25 20 15 10 5 0 0 -10 -20 -30 -40 -50 -60 -70 -80 GR, GAIN REDUCTION (dB) Test circuit has tuned input providing a source resistance optimized for best noise figure. f = 30 MHz BW = 1.0 MHz
Figure 12. Noise Figure versus AGC Gain Reduction
Figure 13. Harmonic Distortion versus AGC Gain Reduction for AM Carrier (For Test Circuit, See Figure 14)
40 HARMONIC DISTORTION IN DETECTED MODULATION (%) 35 30 25 20 15 10 5.0 0 0 10 20 30 40 50 60 70 80 GR, GAIN REDUCTION (dB) EO = 2400 mVpp 240 mVpp f = 10.7 MHz Modulation: 90 % AM, fm = 1.0 kHz Load at Pin 8 = 2.0 k EO = peak-to-peak envelope of modulated 10.7 MHz carrier at Pin 8
760 mVpp
Figure 14. 10.7 MHz Amplifier Gain
7 0.002 6 VAGC 10.7 MHz (50 Source) 5.6 k 5 4 82 pF 50-150 pF L1
] 55 dB, BW ] 100 kHz
8 36 pF 50 Load L2 RFC +12 Vdc 0.002
MC1490P
1
3 2
0.002
L1 = 24 turns, #22 AWG wire on a T12-44 micro metal Toroid core (-124 pF)
L2 = 20 turns, #22 AWG wire on a T12-44 micro metal Toroid core (-100 pF)
4
MOTOROLA ANALOG IC DEVICE DATA
MC1490
Figure 15. S11 and S22, Input and Output Reflection Coefficient Figure 16. S11 and S22, Input and Output Reflection Coefficient
Figure 17. S21, Forward Transmission Coefficient (Gain)
70 MHz 80 MHz 10 100 MHz 120 MHz 150 MHz
Figure 18. S12, Reverse Transmission Coefficient (Feedback)
5.0 60 MHz 50 MHz 5.0 40 MHz 10 30 MHz 20 MHz 15 10 MHz
200 MHz
MOTOROLA ANALOG IC DEVICE DATA
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MC1490
Figure 19. 60 MHz Power Gain Test Circuit
0.0001 F 7 C2 VAGC L1 Input (50 ) 5 C1 4 RAGC VR(AGC) 3 2 +12 Vdc 0.001 F MC1490P 1 6 8 L2 C3 Shield C4 Output (50 )
Figure 20. Video Amplifier
0.001 F 7 10 k 5.6 k 1.0 F 6 MC1490P 5 4 0.001 F +12 Vdc 0.001 F 2 3 1.0 F 1 eo 8 RL
1.0 F VR(AGC) VR(AGC) ei
L1 = 7 turns, #20 AWG wire, 5/16 Dia.,5/8 long L2 = 6 turns, #14 AWG wire, 9/16 Dia.,3/4 long C1,C2,C3 = (1-30) pF C4 = (1-10) pF
Figure 21. 30 MHz Amplifier (Power Gain = 50 dB, BW 1.0 MHz)
[
8
Figure 22. 100 MHz Mixer
VAGC
0.002 F 6 (1 - 30) pF Input (50 ) L1 5 VAGC
7
6.0 V
5 6 L1 4 7 8 L2 1 MC1490P
T1 C2 1 2 1 - 10 pF 10 H RL = 50
Input from local oscillator (70 MHz) Signal Input (100 MHz)
100 (1 - 10) pF
(1 - 10) pF (1 - 30) pF IF Output (30 MHz)
MC1490P
38 pF
5.6 k
43 0.002 F VR(AGC)
(1 - 30) pF
+12 Vdc
3 0.002 F
2
+12 Vdc 10 H
0.002 F
L1 = 12 turns, #22 AWG wire on a Toroid core, (T37-6 micro metal or equiv). T1: Primary = 17 turns, #20 AWG wire on a Toroid core, (T44-6). Secondary = 2 turns, #20 AWG wire.
L1 = 5 turns, #16 AWG wire, 1/4, ID Dia., 5/8 long L2 = 16 turns, #20 AWG wire on a Toroid core, (T44-6).
Figure 23. Two-Stage 60 MHz IF Amplifier (Power Gain
10 k VR(AGC) 5.1 k Input (50 ) 24 pF 4 200 H 5 6 (1-10) pF 0.002 F 2 3 RFC 10 H +12 Vdc MC1490P 1 (1-10) pF (1-10) pF
[ 80 dB, BW [ 1.5 MHz)
7
Shield 8
T1 0.002 F
7 4 5 6
Shield T2 8 MC1490P 1 (1-10) pF 2 3 0.001 F RFC Output (50 )
1.0 k 39 pF
0.002 F
T1: Primary Winding = 15 turns, #22 AWG wire, 1/4 ID Air Core Secondary Winding = 4 turns, #22 AWG wire, Coefficient of Coupling 1.0
[
T2: Primary Winding = 10 turns, #22 AWG wire, 1/4 ID Air Core Secondary Winding = 2 turns, #22 AWG wire, Coefficient of Coupling 1.0
[
6
MOTOROLA ANALOG IC DEVICE DATA
MC1490
DESCRIPTION OF SPEECH COMPRESSOR The amplifier drives the base of a PNP transistor operating common-emitter with a voltage gain of approximately 20. The control R1 varies the quiescent Q point of this transistor so that varying amounts of signal exceed the level Vr. Diode D1 rectifies the positive peaks of Q1's output only when these peaks are greater than Vr 7.0 V. The resulting output is filtered by Cx, Rx. Rx controls the charging time constant or attack time. Cx is involved in both charge and discharge. R2 (the 150 k and input resistance of the emitter-follower Q2) controls the decay time. Making the decay long and attack short is accomplished by making Rx small and R2 large. (A Darlington emitter-follower may be needed if extremely slow decay times are required.) The emitter-follower Q2 drives the AGC Pin 5 of the MC1490P and reduces the gain. R3 controls the slope of signal compression. Table 1. Distortion versus Frequency
Distortion Frequency 10 mV ei 100 Hz 300 Hz 1.0 kHz 10 kHz 100 kHz 3.5% 2% 1.5% 1.5% 1.5% 100 mV ei 12% 10% 8% 8% 8% 10 mV ei 15% 6% 3% 1% 1% 100 mV ei 27% 20% 9% 3% 3% Distortion
]
Notes 1 and 2 Notes: (1) (2) Decay = 300 ms Attack = 20 ms Cx = 7.5 F Rx = 0 (Short) (3) (4)
Notes 3 and 4 Decay = 20 ms Attack = 3.0 ms Cx = 0.68 F Rx = 1.5 k
Figure 24. Speech Compressor
+12 V 25 F 0.001 1.0 k 1.0 k 2 5 15 F Input 4 6 15 F R3 15 k 7 1 MC1490P 3 +12 V +12 V 8 10 F 10 F Output
+12 V R2 Q2 2N3904 4.7 k 150 k Cx Rx
220 Q1 2N3906 D1 6.8 k
2.2 k
Vr 33 k R1 100 k
MOTOROLA ANALOG IC DEVICE DATA
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MC1490
OUTLINE DIMENSIONS
P SUFFIX PLASTIC PACKAGE CASE 626-05 ISSUE K -B-
1 4
8
5
NOTES: 1. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 2. PACKAGE CONTOUR OPTIONAL (ROUND OR SQUARE CORNERS). 3. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. DIM A B C D F G H J K L M N MILLIMETERS MIN MAX 9.40 10.16 6.10 6.60 3.94 4.45 0.38 0.51 1.02 1.78 2.54 BSC 0.76 1.27 0.20 0.30 2.92 3.43 7.62 BSC --- 10_ 0.76 1.01 INCHES MIN MAX 0.370 0.400 0.240 0.260 0.155 0.175 0.015 0.020 0.040 0.070 0.100 BSC 0.030 0.050 0.008 0.012 0.115 0.135 0.300 BSC --- 10_ 0.030 0.040
F
NOTE 2
-A- L
C -T-
SEATING PLANE
J N D K
M
M
H
G 0.13 (0.005) TA
M
B
M
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MOTOROLA ANALOG IC DEVICE DATA MC1490/D
*MC1490/D*

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