ML1490 RF/IF/Audio Amplifier Wideband Amplifier With AGC Legacy Device: Motorola MC1490 The ML1490 is an integrated circuit featuring wide–range AGC for use in RF/IF amplifiers and audio amplifiers. 8 • 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 • 6.0 V to 15 V Operation, Single Polarity Supply • Operating Temperature Range TA = –40° to +85°C 1 P DIP 8 = PP PLASTIC PACKAGE CASE 626 CROSS REFERENCE/ORDERING INFORMATION PACKAGE MOTOROLA LANSDALE P DIP 8 MC1490P ML1490PP Note: Lansdale lead free (Pb) product, as it becomes available, will be identified by a part number prefix change from ML to MLE. Note: See Similar ML1350 For Possible Option MAXIMUM RATINGS (TA = +25°C, unless otherwise noted.) Symbol Value Unit VCC +18 Vdc VAGC VCC Vdc Input Differential Voltage VID 5.0 Vdc Operating Temperature Range TA –40 to +85 °C Tstg –65 to +150 °C TJ +150 °C Rating Power Supply Voltage AGC Supply Storage Temperature Range Junction Temperature Representative Schematic Diagram 2 PIN CONNECTIONS Output (+) Output (–) 1 VCC 2 GND 3 6 Noninverting Input Inverting Input 4 5 AGC Input VCC 8 7 Substrate Ground – + (Top View) 1.5 k VAGC 70 5.5 k 12.1 k 5 470 8 (+) Outputs (–) 1 2.0 k 470 SCATTERING PARAMETERS (VCC = +12 Vdc, TA = +25°C, Zo = 50 Ω) f = MHz Typ 4 (–) 45 Inputs (+) Parameter 1.4 k 66 2.8 k 6 200 200 2.8 k 5.0 k 5.0 k 5.6 k 1.1 k 1.1 k 1.9k 8.4 k 200 3 Substrate 7 Pins 3 and 7 should both be connected to circuit ground. Page 1 of 8 www.lansdale.com Symbol 30 60 Unit Input Reflection Coefficient |S11| θ11 0.95 –7.3 0.93 –16 – deg Output Reflection Coefficient |S22| θ22 0.99 –3.0 0.98 –5.5 – deg Forward Transmission Coefficient |S21| θ21 16.8 128 14.7 64.3 – deg Reverse Transmission Coefficient S12 θ12 0.00048 84.9 0.00092 79.2 – deg Issue A LANSDALE Semiconductor, Inc. ML1490 ELECTRICAL CHARACTERISTICS (VCC = 12 Vdc, f = 60 MHz, BW = 1.0 MHz, TA = 25°C) Characteristic Figure Symbol Min Typ Max Unit Power Supply Current Drain – ICC – – 17 mA AGC Range (AGC) 5.0 V Min to 7.0 V Max 19 MAGC –60 – – dB Output Stage Current (Sum of Pins 1 and 8) – IO 4.0 – 7.5 mA Single–Ended Power Gain RS = RL = 50 Ω 19 GP 40 – – dB Noise Figure RS = 50 Ohms 19 NF – 6.0 – dB Power Dissipation – PD – 168 204 mW Figure 1. Unneutralized Power Gain versus Frequency (Tuned Amplifier, See Figure 19) Figure 2. Voltage Gain versus Frequency (Video Amplifier, See Figure 20) AC , SINGLE±ENDED VOLTAGE GAIN (dB) G P , UNNEUTRALIZED GAIN (dB) (SINGLE–ENDED OUTPUT) 70 VCC = 12 Vdc 60 50 40 30 20 10 0 10 20 50 100 200 RL = 1.0 k 40 30 RL = 100 Ω 20 10 0 RL = 10 Ω 0.1 1.0 10 100 1000 f, FREQUENCY (MHZ) Figure 3. Dynamic Range: Output Voltage versus Input Voltage (Video Amplifier, See Figure 20) Figure 4. Voltage Gain versus Frequency (Video Amplifier, See Figure 20) 50 VCC = 12 Vdc V5(AGC) = 0 V f = 1.0 MHz AV , SINGLE VOLTAGE GAIN (dB) 5.0 1.0 0.5 RL = 1.0 k 0.1 100 Ω 0.05 10 Ω 0.01 0.1 0.2 0.5 1.0 2.0 5.0 10 20 50 100 VCC = 6.3 Vdc 40 RL = 1.0 kΩ 30 100 Ω 20 10 0 0.3 en, INPUT VOLTAGE (mVRMS) Page 2 of 8 VCC = 12 Vdc f, FREQUENCY (MHZ) 10 V O, OUTPUT VOLTAGE (V RMS) 50 0.5 1.0 3.0 5.0 10 30 50 100 300 f, FREQUENCY (MHZ) www.lansdale.com Issue A LANSDALE Semiconductor, Inc. ML1490 Legacy Applications Information f = 1.0 MHz Rl = 1.0 Ω 40 AV 24 0 21 10 35 18 30 15 25 12 ICC 20 9.0 15 6.0 10 3.0 5.0 GR , GAIN REDUCTION (dB) 45 Figure 6. Typical Gain Reduction versus AGC Voltage I C , SUPPLY CURRENT (mAdc) AV, SINGLE±ENDED VOLTAGE GAIN (dB) Figure 5. Voltage Gain and Supply Current versus Supply Voltage (Video Amplifier, See Figure 20) 2.0 4.0 6.0 8.0 10 12 14 RAGC 30 RAGC = 100 kΩ 40 50 60 RAGC = 0 Ω 0 3.0 6.0 9.0 10 40 100 < RAGC < 100 k G p ,POWER GAIN (dB) GR , GAIN REDUCTION (dB) 50 30 40 50 60 20 10 VCC = 12 Vdc f = 60 MHz RAGC = 5.6 kΩ 100 120 140 160 5.2 5.4 5.6 +125°C 5.8 6.0 6.2 6.4 6.6 6.8 7.0 VR(AGC), AGC VOLTAGE (Vdc) Figure 9. Power Gain versus Supply Voltage (See Test Circuit, Figure 19) Figure 10. Noise Figure versus Frequency 10 80 9.0 70 f = 60 MHz 60 NF, NOISE FIGURE (dB) Gp , POWER GAIN (dB) 30 –55°C 0 IAGC AGC CURRENT (µA) 50 GP 40 30 20 8.0 7.0 6.0 5.0 RS Optimized for minimum NF 4.0 3.0 2.0 10 1.0 0 0 0 2.0 4.0 6.0 8.0 10 12 14 16 15 20 25 30 35 40 50 60 70 80 90 100 150 f, FREQUENCY (MHz) VCC, POWER SUPPLY VOLTAGE (V) Page 3 of 8 27 +75°C –20 5.0 80 24 +25°C 80 60 21 0°C –10 40 18 30 70 20 15 Figure 8. Fixed Tuned Power Gain Reduction versus Temperature (See Test Circuit, Figure 19) 0 0 12 VR(AGC), AGC VOLTAGE (Vdc) Figure 7. Typical Gain Reduction versus AGC Current –40 –20 RAGC = 5.6 kΩ 80 16 VCC, SUPPLY VOLTAGE (V) 20 5 MC1490P 20 70 0 0 VR(AGC) www.lansdale.com Issue A LANSDALE Semiconductor, Inc. ML1490 Legacy Applications Information Figure 11. Noise Figure versus Source Resistance Figure 12. Noise Figure versus AGC Gain Reduction 40 20 14 f = 105 MHz 12 f = 30 MHz BW = 1.0 MHz 35 VCC = 12 Vdc 16 NOISE FIGURE (dB) NF, NOISE FIGURE (dB) 18 10 f = 60 MHz 8.0 f = 30 MHz 6.0 4.0 30 25 20 15 Test circuit has tuned input providing a source resistance optimized for best noise figure. 10 5 2.0 0 0 100 200 400 600 1.0 k 2.0 k 4.0 k 10 k 0 –10 –20 RS, SOURCE RESISTANCE (Ω) –30 –40 –50 –60 –70 –80 GR, GAIN REDUCTION (dB) Figure 13. Harmonic Distortion versus AGC Gain Reduction for AM Carrier (For Test Circuit, See Figure 14) HARMONIC DISTORTION IN DETECTED MODULATION (%) 40 f = 10.7 MHz Modulation: 90 % AM, f m = 1.0 kHz Load at Pin 8 = 2.0 kΩ EO = peak–to–peak envelope of modulated 10.7 MHz carrier at Pin 8 35 30 760 mVpp 25 20 EO = 2400 mVpp 15 240 mVpp 10 5.0 0 0 10 20 30 40 50 60 70 80 GR, GAIN REDUCTION (dB) Figure 14. 10.7 MHz Amplifier Gain 55 dB, BW 100 kHz 7 0.002 6 VAGC 10.7 MHz (50 Ω Source) 8 5 5.6 k 4 82 pF L1 ML1490 Page 4 of 8 50 Ω Load L2 RFC 3 2 0.002 50–150 pF L1 = 24 turns, #22 AWG wire on a T12–44 micro metal Toroid core (–124 pF) 1 36 pF +12 Vdc 0.002 L2 = 20 turns, #22 AWG wire on a T12–44 micro metal Toroid core (–100 pF) www.lansdale.com Issue A LANSDALE Semiconductor, Inc. ML1490 Legacy Applications Information Figure 15. S11 and S22, Input and Output Reflection Coefficient Figure 17. S21, Forward Transmission Coefficient (Gain) 70 MHz Figure 16. S11 and S22, Input and Output Reflection Coefficient Figure 18. S12, Reverse Transmission Coefficient (Feedback) 80 MHz 10 100 MHz 5.0 60 MHz 120 MHz 150 MHz 50 MHz 5.0 200 MHz 40 MHz 10 30 MHz 15 20 MHz Page 5 of 8 10 MHz www.lansdale.com Issue A LANSDALE Semiconductor, Inc. ML1490 Legacy Applications Information Figure 19. 60 MHz Power Gain Test Circuit 0.0001 µF C3 Shield C4 8 VAGC L1 7 10 k VR(AGC) VR(AGC) L2 ML1490 5 3 8 1 2 4 1.0 µF 3 0.001 µF +12 Vdc +12 Vdc 0.001 µF 0.001 µF VR(AGC) RL ML1490 5 ei 2 RAGC eo 6 5.6 k 1.0 µF 1 4 C1 Output (50 Ω) 6 C2 0.001 µF 1.0 µF 7 Input (50 Ω) Figure 20. Video Amplifier 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) 0.002 µF 6 (1 – 30) pF Input (50 Ω) 38 pF 5 L1 VAGC VAGC ≈ 6.0 V 7 T1 8 RL = 50 Ω C2 ML1490 1 2 4 3 0.002 µF 5.6 k Figure 22. 100 MHz Mixer 1 – 10 pF 10 µH Input from local oscillator (70 MHz) 5 100 (1 – 10) pF 6 Signal Input (100 MHz) (1 – 10) pF (1 – 30) pF 8 IF Output (30 MHz) ML1490 L2 L1 4 (1 – 30) pF 3 0.002 µF +12 Vdc VR(AGC) 7 2 1 +12 Vdc 0.002 µF 10 µH 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). 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. Figure 23. Two–Stage 60 MHz IF Amplifier (Power Gain 80 dB, BW 1.5 MHz) 10 k VR(AGC) 5.1 k Input (50 Ω) 24 pF 4 200 µH 5 (1–10) pF Shield 7 T1 0.002 µF ML1490 1 (1–10) pF 3 5 1.0 k 2 0.002 µF T2 8 8 6 (1–10) pF Shield 7 4 ML1490 6 1 (1–10) pF 39 pF 2 0.002 µF RFC 10 µH Output (50 Ω) 3 RFC 0.001 µF +12 Vdc 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 Page 6 of 8 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 www.lansdale.com Issue A LANSDALE Semiconductor, Inc. ML1490 DESCRIPTION OF SPEECH COMPRESSOR Table 1. Distortion versus Frequency 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 kΩ 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 ML1490PP and reduces the gain. R3 controls the slope of signal compression. Distortion Frequency Distortion 10 mV ei 100 mV ei 10 mV ei 100 mV ei 100 Hz 3.5% 12% 15% 27% 300 Hz 2% 10% 6% 20% 1.0 kHz 1.5% 8% 3% 9% 10 kHz 1.5% 8% 1% 3% 100 kHz 1.5% 8% 1% 3% Notes 1 and 2 Notes: (1) (2) Decay = 300 ms Attack = 20 ms Cx = 7.5 µF Rx = 0 (Short) Notes 3 and 4 (3) (4) Decay = 20 ms Attack = 3.0 ms Cx = 0.68 µF Rx = 1.5 kΩ Figure 24. Speech Compressor +12 V 25 µF 0.001 1.0 k 1.0 k 10 µF 2 5 15 µF 4 Input R3 15 k 3 7 +12 V 220 +12 V Page 7 of 8 Rx 150 k +12 V 2.2 k Q1 2N3906 R2 Q2 2N3904 4.7 k 10 µF 8 ML1490 6 15 µF Output 1 Cx D1 6.8 k www.lansdale.com Vr 33 k R1 100 k Issue A LANSDALE Semiconductor, Inc. ML1490 OUTLINE DIMENSIONS 8 P DIP = PP (ML1490PP) PLASTIC PACKAGE CASE 626–05 ISSUE K 5 –B– 1 4 F –A– NOTE 2 L C J –T– N SEATING PLANE D H M K 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 ––– 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 ––– 0.030 0.040 G 0.13 (0.005) M T A M B M Lansdale Semiconductor reserves the right to make changes without further notice to any products herein to improve reliability, function or design. Lansdale does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others. “Typical” parameters which may be provided in Lansdale data sheets and/or specifications can vary in different applications, and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by the customer’s technical experts. Lansdale Semiconductor is a registered trademark of Lansdale Semiconductor, Inc. Page 8 of 8 www.lansdale.com Issue A