MC3356 Wideband Receiver MC3356 includes Oscillator, Mixer, Limit
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MC3356 Wideband Receiver
MC3356 includes Oscillator, Mixer, Limiting Amplifier, Quadrature Detector, Audio Buffer, Squelch, Meter Drive, Squelch Status output, Data Shaper comparator. MC3356 designed digital data communciations equipment. Data Rates kilobaud
WIDEBAND RECEIVER
SEMICONDUCTOR TECHNICAL DATA
Excellent Sensitivity: Limiting Sensitivity Excellent Sensitivity: µVrms Highly Versatile, Full Function Device, External Parts Required Down Converter Used Independently Similar NE602
SUFFIX PLASTIC PACKAGE CASE
SUFFIX PLASTIC PACKAGE CASE 751D (SO-20L)
Figure Representative Block Diagram
Ground Ceramic Filter Quadrature Detector Tank Device MC3356DW MC3356P Mixer Data Shaping Comparator Squelch Status Hysteresis Input Ground
CONNECTIONS
Ground Emitter Data Output Collector Mixer Output Limiter Input Limiter Bias Limiter Bias Quad Bias Input Ground Data Output Comparator Comparator Squelch Status Squelch Control Buffered Output Demodulator Filter Quad Input
Comparator Meter Current
Limiter
Buffer
Squelch Adjust (Meter)
ORDERING INFORMATION
Operating Temperature Range +85°C Package SO-20L Plastic
Motorola, Inc. 1996
MOTOROLA ANALOG DEVICE DATA
MC3356
MAXIMUM RATINGS
Rating Power Supply Voltage Operating Power Supply Voltage Range (Pins Operating Supply Voltage Range (Pin Junction Temperature Operating Ambient Temperature Range Storage Temperature Range Power Dissipation, Package Rating Symbol VCC(max) Tstg Value 12.0 1.25 Unit
ELECTRICAL CHARACTERISTICS (VCC Vdc, MHz, fosc 110.7 MHz, kHz, fmod kHz, source,
25°C, test circuit Figure unless otherwise noted.) Characteristics Drain Current Total, Input limiting Input quieting Vrms µA/dB Unit mAdc µVrms µVrms
Mixer Voltage Gain, Mixer Input Resistance, Mixer Input Capacitance, Mixer/Oscillator Frequency Range (Note IF/Quadrature Detector Frequency Range (Note Rejection (30% mVrms) Demodulator Output, Meter Drive Squelch Threshold
NOTE: taken Test Circuit Figure component values required.
Figure Test Circuit
Squelch Status Data Output 0.01 Input Ground Data Output Comp(+) Comp(-) Squelch Status Squelch Control Demod Demod Filter Demod
Input 0.01
Quad Input
110.7 MHz, #22, 3/16 Form w/slug 10.7 MHz, #30, 3/16 Form w/slug muRata SFE10.7 MA5-Z KYOCERA KBF10.7MN-MA
COL. Mixer 0.01 0.01 Limiter Input Limiter Bias 0.01 Limiter Bias Quad Bias
MOTOROLA ANALOG DEVICE DATA
MC3356
Figure Output Components Signal, Noise, Distortion
S+N+D RELATIVE OUTPUT (dB) 0.01 INPUT (mVrms) METER CURRENT, (µA) 0.010 INPUT (mVrms) 1000
Figure Meter Current versus Signal Input
GENERAL DESCRIPTION This device intended single double conversion receiver systems, primarily data transmission baud (250 kHz). contains oscillator, mixer, limiting quadrature detector, signal strength meter drive, data shaping amplifier. oscillator common base Colpitts type which crystal controlled, shown Figure controlled shown other figures. higher VCC, been operated high MHz. mixer/oscillator voltage gain approximately MHz, readily achievable. mixer functions well from input signal µVrms, below which squelch unpredictable, about mVrms, before evidence overload. Operation Vrms input permitted, non-linearity meter output incurred, some oscillator pulling suspected. rejection above mVrms degraded. limiting high frequency type, capable being operated MHz. expected used 10.7 most cases, availability standard ceramic resonators. quadrature detector internally coupled quadrature capacitor internally provided. -3dB limiting sensitivity itself approximately accept signals Vrms without distortion change detector quiescent level. unusual that each last stages state limiter contains signal strength sensitive, current sinking device. These parallel connected buffered produce signal strength meter drive which fairly linear input signals mVrms (see Figure simple squelch arrangement provided whereby meter current flowing through meter load resistance flips comparator about above ground. signal strength which this occurs adjusted changing meter load resistor. comparator input output available permit control hysteresis. Good positive action obtained input signals above µVrms. resistor shown test circuit provides small amount hysteresis. connection between resistor ground pot, permits adjustment squelch level without changing amount hysteresis. squelch internally connected both quadrature detector data shaper. quadrature detector output, when squelched, goes level approximately equal zero signal level unsquelched. squelch causes data shaper produce high (VCC) output. data shaper complete ``floating'' comparator, with back back diodes across inputs. output quadrature detector directly either input this amplifier produce output that either VEE, depending upon received frequency. impedance biasing varied produce amplifier which "follows" frequency detuning some degree, prevent data pulse width changes. When data shaper driven directly from demodulator output, there distortion diodes, this important data application. useful note relating high/low input frequency logic state: frequency corresponds demodulator output. oscillator above incoming frequency, then high frequency will produce logic (input input Data Shaper shown Figures APPLICATION NOTES MC3356 high frequency/high gain receiver that requires following certain layout techniques designing stable circuit configuration. objective minimize eliminate, possible, unwanted feedback.
MOTOROLA ANALOG DEVICE DATA
MC3356
Figure Application with Fixed Bias Data Shaper
Data 0.01 Input Ground Data Output Comp(+) Comp(-) Squelch Status Squelch Control Demod Car. Det.
Demod Filter
Quad Input
MC3356
COL.
Mixer 0.01
Limiter Input 0.01
Limiter Bias
Limiter Bias 0.01 0.01
Quad Bias
Bead 0.01
Bead
Cer. Fil. 10.7
APPLICATION NOTES (continued) Shielding, which includes placement input output components, important minimizing electrostatic electromagnetic coupling. MC3356 connections such that circuit designer place critical input output circuits opposite ends chip. Shielding normally required inductors tuned circuits. MC3356 separate ground sections which allows good external circuit isolation minimizing common ground paths. Note that circuits Figures have Oscillator, circuits predominantly referenced plus supply rails. Figure other hand, shows suitable means ground referencing. methods produce identical results when carefully executed. important treat ground node either approach. input should ``grounded'' then input mixer/oscillator grounds bypasses) should connected inductance path detector sections should also have their bypasses returned separate path decoupled minimize feedback, although configuration Figure shows successful implementation common supply. Once again, message define supply node ground node return each section those nodes separate, impedance paths. test circuit Figure limiting level which lowered untuned transformer input shown Figures applications that require additional sensitivity, amplifier added, with greater than gain. This will give sensitivity additional gain will reduce receiver dynamic range without improving sensitivity. Although test circuit operates mixer/oscillator optimum performance minimum recommended high frequency applications (above MHz), applications where oscillator drives prescaler.
MOTOROLA ANALOG DEVICE DATA
MC3356
Figure Application with Self-Adjusting Bias Data Shaper
Data
Car. Det.
Input Ground Data Output 0.01 Comp(+) Squelch Control Demod
Demod Filter
Quad Input 10.7
Comp(-) Squelch Status
APPLICATION NOTES (continued) Depending external circuit, inverted noninverted data available Inverted data makes higher frequency signal "one" when local oscillator above incoming Figure schematic shows comparator with hysteresis. this circuit reference voltage about same demodulated output voltage (Pin when signal present. This type circuit preferred systems where data rates drop zero. Some systems have frequency limit data rate, such systems using MC3850 ACIA that start stop bit. This defines frequency limit that appear data stream. Figure circuit then changed circuit configuration shown Figure Figure reference voltage comparator derived from demodulator output through pass circuit where much lower than lowest frequency data rate. This similar circuits will compensate small tuning changes drift) quadrature detector. Squelch status (Pin goes high (squelch off) when input signal becomes greater than some preset level resistance between ground. Hysteresis added circuit externally resistance from
MOTOROLA ANALOG DEVICE DATA
Figure Internal Schematic
MC3356
MOTOROLA ANALOG DEVICE DATA
MC3356
OUTLINE DIMENSIONS
SUFFIX PLASTIC PACKAGE CASE 738-03
NOTES: DIMENSIONING TOLERANCING ANSI Y14.5M, 1982. CONTROLLING DIMENSION: INCH. DIMENSION CENTER LEAD WHEN FORMED PARALLEL. DIMENSION DOES INCLUDE MOLD FLASH. 738-02 OBSOLETE, STANDARD 738-03. MILLIMETERS 25.66 27.17 6.10 6.60 3.81 4.57 0.39 0.55 1.27 1.27 1.77 2.54 0.21 0.38 2.80 3.55 7.62 1.01 0.51 INCHES 1.010 1.070 0.240 0.260 0.150 0.180 0.015 0.022 0.050 0.050 0.070 0.100 0.008 0.015 0.110 0.140 0.300 0.020 0.040
SEATING PLANE 0.25 (0.010)
0.25 (0.010)
SUFFIX PLASTIC PACKAGE CASE 751D-03 (SO-20L)
NOTES: DIMENSIONING TOLERANCING ANSI Y14.5M, 1982. CONTROLLING DIMENSION: MILLIMETER. DIMENSION INCLUDE MOLD PROTRUSION. MAXIMUM MOLD PROTRUSION 0.15 (0.006) SIDE. 751D-01, OBSOLETE, STANDARD 751D-03. MILLIMETERS 12.65 12.95 7.40 7.60 2.35 2.65 0.35 0.49 0.50 0.90 1.27 0.25 0.32 0.10 0.25 10.05 10.55 0.25 0.75 INCHES 0.499 0.510 0.292 0.299 0.093 0.104 0.014 0.019 0.020 0.035 0.050 0.010 0.012 0.004 0.009 0.395 0.415 0.010 0.029
0.25 (0.010)
SEATING
PLANE
0.25 (0.010)
MOTOROLA ANALOG DEVICE DATA
MC3356
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MC3356/D MOTOROLA ANALOG DEVICE DATA
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