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| Order this document by MC3335/D Low Power Narrowband FM Receiver . . . includes dual FM conversion with Oscillators, Mixers, Quadrature Discriminator, and Meter Drive/Carrier Detect Circuitry. The MC3335 also has a comparator circuit for FSK detection. * Complete Dual Conversion Circuitry MC3335 LOW POWER DUAL CONVERSION FM RECEIVER SEMICONDUCTOR TECHNICAL DATA * * * * * * * * * * Low Voltage: VCC = 2.0 to 6.0 Vdc Low Drain Current (Typical 3.6 mA with VCC = 3.0 Vdc) Excellent Sensitivity: - 3.0 dB Input Limiting = 0.7 V Externally Adjustable Carrier Detect Function Separate Data Shaping Output Circuitry Data Rate Up to 35000 Baud Detectable 60 dB RSSI Range Low Number of External Parts Required Manufactured in Motorolas MOSAIC(R) Process Technology MC13135 is Preferred for New Designs P SUFFIX PLASTIC PACKAGE CASE 738 DW SUFFIX PLASTIC PACKAGE CASE 751D (SO-20L) Simplified Application as a Fixed Receiver 0.01 1 120 pF 2 50 pF 3 10.245 MHz Ceramic Filter 455 kHz 4 5 VCC 6 7 0.1 0.1 9 200 k 10 10 k 11 12 0.1 8 13 0.001 Recovered Audio 39 K Limiter 18 17 16 15 10 k 14 Data 0.1 Ceramic Filter 10.7 MHz 1.0 + VCC 19 33 pF 0.41 H 20 0.01 PIN CONNECTIONS RF Input 49.7 MHz 1st Mixer Input 1 2nd Lo Emitter 2 2nd Lo Base 3 2nd Mixer Output 4 VCC 5 Limiter Input 6 Limiter Decoupling 7 Limiter Decoupling 8 Meter Drive 9 Carrier Detect 10 LIMITER 20 1st Mixer Input 19 1st Lo Tank 18 1st Lo Tank 17 1st Mixer Output 16 2nd Mixer Input 15 VEE 14 Comparator Output 13 Comparator Input 12 Detector Output 11 Quadrature Coil ORDERING INFORMATION Device Operating Temperature Range TA = - 40 to +85C Package SO-20 Plastic DIP To Carrier Detect Indicator Lp = 660 H Cp = 180 pF MC3335DW MC3335P (c) Motorola, Inc. 1996 Rev 5 MOTOROLA ANALOG IC DEVICE DATA 1 MC3335 MAXIMUM RATINGS (TA = 25C, unless otherwise noted) Rating Power Supply Voltage Operating Supply Voltage Range (Recommended) Input Voltage (VCC > 5.0 Vdc) Junction Temperature Operating Ambient Temperature Range Storage Temperature Range Pin 5 5 1,20 - - - Symbol VCC(max) VCC V1-20 TJ TA Tstg Value 7.0 2.0 to 6.0 1.0 150 - 40 to + 85 - 65 to + 150 Unit Vdc Vdc Vrms C C C ELECTRICAL CHARACTERISTICS (VCC = 5.0 Vdc, fo = 49.7 MHz, Deviation = 3.0 kHz, TA = 25C, test circuit of Figure 2, unless otherwise noted.) Characteristic Drain Current Input for - 3.0 dB Limiting Recovered Audio (RF Signal Level = 1.0 mV) Noise Output (RF Signal Level = 0 mV) Carrier Detect Threshold (below VCC) Meter Drive Slope Input for 20 dB (S + N/N) First Mixer 3rd Order Intercept (Input) First Mixer Input Resistance (Rp) First Mixer Input Capacitance (Cp) First Mixer Conversion Voltage Gain Second Mixer Conversion Voltage Gain Detector Output Resistance Pin 5 - 12 12 9 9 - - - - - - 12 Min - - - - - - - - - - - - - Typ 4.5 0.7 250 250 0.64 100 1.3 - 20 690 7.2 18 21 1.4 Max 7.0 2.0 - - - - - - - - - - - Unit mAdc Vrms mVrms mVrms Vdc A/dB Vrms dBm pF dB dB k RF Input 49.7 MHz 0.1 2.6 Figure 1. Test Circuit VCC 1 56 pF 2 39 pF 3 10.245 MHz Ceramic Filter 455 kHz 4 5 VCC 6 7 0.1 0.1 200 k 10 10 k 11 0.1 8 9 13 12 7.5 k 68 k 0.01 RA 18 17 16 15 0.1 14 19 39 MHz Ceramic Filter 10.7 MHz 1.0 + 300 20 1.4 20 k To Carrier Detect Indicator Lp = 660 H Cp = 180 pF 2 MOTOROLA ANALOG IC DEVICE DATA MC3335 Figure 2. Imeter versus Input 12 11 10 9.0 I 9 ( A) 7.0 6.0 5.0 4.0 3.0 2.0 - 130 - 120 - 110 - 100 - 90 - 80 - 70 - 60 - 50 - 40 - 30 I CC (mA) 8.0 VCC A 9 MC3335 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0 0 1.0 2.0 3.0 4.0 VCC (V) 5.0 6.0 7.0 Recovered Audio ICC, Carr. Det. Low (RF in = 10 mV) ICC, Carr. Det. High (RF in = 0 mV) Figure 3. Drain Current, Recovered Audio versus Supply 800 700 600 V12 (mVrms) 500 400 300 200 100 0 8.0 RF INPUT (dBm) Figure 4. (S + N), N of 2nd Mixer 20 10 0 - 10 (S + N)/N (dB) - 20 - 30 - 40 - 50 - 60 - 70 - 80 - 130 - 120 - 110 - 100 - 90 - 80 - 70 - 60 - 50 - 40 - 30 N (S + N)/N (dB) S+N 20 10 0 - 10 - 20 - 30 - 40 - 50 - 60 - 70 Figure 5. (S + N)/N versus Input S+N N 12 7.5 k MC3335 0.01 - 80 - 130 - 120 - 110 - 100 - 90 - 80 - 70 - 60 - 50 - 40 - 30 RF INPUT (dBm) RF INPUT (dBm) Figure 6. 1st Mixer 3rd Order Intermodulation 20 10 0 - 10 - 20 (dB) - 40 - 50 - 60 - 70 - 80 - 100 - 90 - 80 - 70 - 60 - 50 - 40 - 30 - 20 - 10 0 0 - 40 Desired Products 3rd Order Intermod. Products V12 (Vdc) - 30 2.0 3.0 4.0 Figure 7. Detector Output versus Frequency 1.0 - 30 - 20 - 10 0 10 20 30 40 RF INPUT (dBm) RELATIVE INPUT FREQUENCY (kHz) MOTOROLA ANALOG IC DEVICE DATA 3 MC3335 CIRCUIT DESCRIPTION The MC3335 is a complete FM narrowband receiver from antenna input to audio preamp output. The low voltage dual conversion design yields low power drain, excellent sensitivity and good image rejection in narrowband voice and data link applications. In the typical application diagram, the first mixer amplifies the signal and converts the RF input to 10.7 MHz. This IF signal is filtered externally and fed into the second mixer, which further amplifies the signal and converts it to a 455 kHz IF signal. After external bandpass filtering, the low IF is fed into the limiting amplifier and detection circuitry. The audio is recovered using a conventional quadrature detector. Twice-IF filtering is provided internally. The input signal level is monitored by meter drive circuitry which detects the amount of limiting in the limiting amplifier. The voltage at the meter drive pin determines the state of the carrier detect output which is active low. Following the first mixer, a 10.7 MHz ceramic bandpass filter is recommended. The 10.7 MHz filtered signal is then fed into one second mixer input pin, the other input pin being connected to VCC. Pin 5 (VCC) is treated as a common point for emitter-driven signals. The 455 kHz IF is typically filtered using a ceramic bandpass filter, then fed into the limiter input pin. The limiter has 10 V sensitivity for - 3.0 dB limiting, flat to 1.0 MHz. The output of the limiter is internally connected to the quadrature detector, including a quadrature capacitor. A parallel LC tank is needed externally from Pin 11 to VCC. A 39 k shunt resistance is included which determines the peak separation of the quadrature detector; a smaller value will increase the spacing and linearity but decrease recovered audio and sensitivity. A data shaping circuit is available and can be coupled to the recovered audio output of Pin 12. The circuit is a comparator which is designed to detect zero crossings of FSK modulation. Data rates of up to 35000 baud are detectable using the typical application. Hysteresis is available by connecting a high-valued resistor from Pin 13 to Pin 14. Values below 120 k are not recommended as the input signal cannot overcome the hysteresis. The meter drive circuitry detects input signal level by monitoring the limiting of the limiting amplifier stages. Figure 2 shows the unloaded current at Pin 9 versus input power. The meter drive current can be used directly (RSSI) or can be used to trip the carrier detect circuit at a specified input power. To do this, pick an RF trip level in dBm. Read the corresponding current from Figure 2 and pick a resistor such that: R9 = 0.64 Vdc / I9 Hysteresis is available by connecting a high-valued resistor RH between Pin 9 and 10. The formula is: Hysteresis = VCC/(RH x 10 - 7) dB APPLICATIONS INFORMATION The first local oscillator can be run using a free running LC tank, as a VCO using PLL synthesis, or driven from an external crystal oscillator. At higher VCC values (6.0 to 7.0 V), it has been run to 170 MHz. The second local oscillator is a common base Colpitts type which is typically run at 10.245 MHz under crystal control. The mixers are doubly balanced to reduce spurious responses. The first and second mixers have conversion gains of 18 dB and 22 dB (typical), respectively. Mixer gain is stable with respect to supply voltage. For both conversions, the mixer impedances and pin layout are designed to allow the user to employ low cost, readily available ceramic filters. Overall sensitivity is shown in Figure 5. The input level for 20 dB (S + N)/N is 1.3 V using the two-pole post-detection filter as demonstrated. 4 MOTOROLA ANALOG IC DEVICE DATA MC3335 OUTLINE DIMENSIONS P SUFFIX PLASTIC PACKAGE CASE 738-03 -A - 20 11 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION "L" TO CENTER OF LEAD WHEN FORMED PARALLEL. 4. DIMENSION "B" DOES NOT INCLUDE MOLD FLASH. 5. 738-02 OBSOLETE, NEW STANDARD 738-03. DIM A B C D E F G J K L M N MILLIMETERS MIN MAX 25.66 27.17 6.10 6.60 3.81 4.57 0.39 0.55 1.27 BSC 1.27 1.77 2.54 BSC 0.21 0.38 2.80 3.55 7.62 BSC 0 15 1.01 0.51 INCHES MIN MAX 1.010 1.070 0.240 0.260 0.150 0.180 0.015 0.022 0.050 BSC 0.050 0.070 0.100 BSC 0.008 0.015 0.110 0.140 0.300 BSC 0 15 0.020 0.040 B 1 10 C L -T - SEATING PLANE E G F D 20 PL 0.25 (0.010) N K M J 20 PL 0.25 (0.010) M M TB M T A M DW SUFFIX PLASTIC PACKAGE CASE 751D-03 (SO-20L) -A - 20 11 NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DIMENSION A AND B DO NOT INCLUDE MOLD PROTRUSION. 4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE. 5. 751D-01, AND -02 OBSOLETE, NEW STANDARD 751D-03. DIM A B C D F G J K M P R MILLIMETERS MIN MAX 12.65 12.95 7.40 7.60 2.35 2.65 0.35 0.49 0.50 0.90 1.27 BSC 0.25 0.32 0.10 0.25 0 7 10.05 10.55 0.25 0.75 INCHES MIN MAX 0.499 0.510 0.292 0.299 0.093 0.104 0.014 0.019 0.020 0.035 0.050 BSC 0.010 0.012 0.004 0.009 7 0 0.395 0.415 0.010 0.029 1 10 -B - P 10 PL 0.25 (0.010) M B M G R X 45 C -T SEATING - PLANE M D 20 PL 0.25 (0.010) M K T B S F J A S MOTOROLA ANALOG IC DEVICE DATA 5 MC3335 Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. How to reach us: USA / EUROPE / Locations Not Listed: Motorola Literature Distribution; P.O. Box 20912; Phoenix, Arizona 85036. 1-800-441-2447 or 602-303-5454 MFAX: RMFAX0@email.sps.mot.com - TOUCHTONE 602-244-6609 INTERNET: http://Design-NET.com JAPAN: Nippon Motorola Ltd.; Tatsumi-SPD-JLDC, 6F Seibu-Butsuryu-Center, 3-14-2 Tatsumi Koto-Ku, Tokyo 135, Japan. 03-81-3521-8315 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park, 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852-26629298 6 MOTOROLA ANALOG IC DEVICE DATA MC3335/D *MC3335/D* |
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