Voltage Narrowband Receiver with single conversion circuitry incl
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Order this document MC3374/D
Voltage Narrowband Receiver
with single conversion circuitry including oscillator, mixer, amplifiers, limiting circuitry, quadrature discriminator. MC3374 perfect narrowband audio data applications which require extremely power consumption. Battery powered applications down possible. MC3374 also includes on-board voltage regulator, battery detection circuitry, receiver enable allowing power down Sleep-ModeTM, undedicated buffer amplifiers allow simultaneous audio data reception, comparator enhancing (Frequency Shift Keyed) data reception 1200 baud. Supply Voltage:
MC3374
VOLTAGE SINGLE CONVERSION RECEIVER
SEMICONDUCTOR TECHNICAL DATA
Power Consumption: Input Bandwidth Excellent Sensitivity: µVrms SINAD Voltage Regulator Available (Source Capability Receiver Enable Allow Active/Standby Operation Battery Detection Circuitry Self Biasing Audio Buffer Data Buffer Data Shaping Comparator Standard 32-Lead Surface Mount Package ORDERING INFORMATION
Device Tested Operating Temperature Range Package TQFP-32 SUFFIX PLASTIC PACKAGE CASE (Thin QFP)
Sleep-Mode trademark Motorola, Inc.
MC3374FTB +70°C
Simplified Block Diagram
Data Data Mixer Mixer Mixer Buffer Buffer Dcpl Dcpl
Base Emit Isrc Dcpl VCC2 Audio
Pass Filter Quadrature Demodulator
Mixer
Data Buffer
VCC3 Audio Buffer Audio Buffer Audio Buffer Battery Detector Battery Detector Select
Voltage Reference
Output Demodulator Decoupling Buffer Quad Tank
Main Current Reference Comp. Receiver Enable Voltage Reference
Vreg
*Internal Connection, ground.
Quad Demod *N/C Tank
*N/C Comp Comp Regulator Enable Reference Test
This device contains active transistors
Motorola, Inc. 1996
MOTOROLA ANALOG DEVICE DATA
MC3374
MAXIMUM RATINGS (Voltage with respect Pins 25°C.)
Rating Supply Voltage Input Signal Audio Buffer Input Data Buffer Input Comparator Input Junction Temperature Storage Temperature Value +150 Unit Vrms Vrms Vrms Vrms
Device should operated outside these values. "Recommended Operating Limits" provide actual device operation.
RECOMMENDED OPERATING CONDITIONS
Parameter Supply Voltage Receiver Enable Voltage Select Voltage Input Signal Level Input Frequency Intermediate Frequency (IF) Audio Buffer Input Data Buffer Input Comparator Input Ambient Temperature Value Open 0.001 Unit mVrms mVrms mVrms mVrms
ELECTRICAL CHARACTERISTICS (VCC 10.7 MHz, fmod kHz, Deviation kHz, 25°C, Test Circuit Figure unless otherwise noted.)
Characteristic OVERALL MC3374 PERFORMANCE Drain Current (Enabled) Drain Current (Disabled) Recovered Audio Input Noise Output Input kHz) Input Limiting MIXER Mixer Input Resistance (Rp) Mixer Input Capacitance (Cp) FIRST AMPLIFIER First Voltage Gain AUDIO BUFFER Voltage Gain Input Resistance Maximum Input Undistorted Output (<5% THD) Maximum Output Swing (<5% THD) Output Resistance DATA BUFFER Voltage Gain Input Resistance Maximum Input Undistorted Output (<5% THD) Maximum Output Swing (<5% THD) Output Resistance mVrms mVpp mVrms mVpp mVrms mVrms µVrms Unit
MOTOROLA ANALOG DEVICE DATA
MC3374
ELECTRICAL CHARACTERISTICS (continued) (VCC 10.7 MHz, fmod kHz, Deviation kHz,
25°C, Test Circuit Figure unless otherwise noted.) Characteristic COMPARATOR Minimum Input Triggering Maximum Input Frequency Rise Time 90%; Fall Time 10%; BATTERY DETECTOR Battery Trip Point Battery Output Battery Output VOLTAGE REGULATOR Regulated Output (see Figure Source Capability 0.95 1.07 1.15 mVrms Unit
Figure MC3374 Pager Application Circuit
Input Disable Enable 4.7+ coupling capacitors should have impedance desired input oscillator frequencies. provides "light coupling" oscillator signal into mixer, should have impedance desired local oscillator frequency. Capacitors labelled bypass capacitors should have impedance desired local oscillator frequencies. network provides impedance matching mixer input (nominally shunted desired RF/IF input frequency. This will allow bench testing receiver from typical signal generators radio service monitors, additional different matching will required maximize receiver sensitivity when used conjunction with antenna, preamplifier mixer. 0.22 N.C. N.C.
Output Buffer
0.01
Data Buffer
Mixer
Audio Buffer
3900 Audio Output
MC3374
Voltage Reference
Pass Filter
Battery Detector Main Current Reference Comp. Receiver Voltage Enable Reference
0.022
Quadrature Demodulator
Data Output NOTES: ceramic bandpass filters, which should have input output impedances Suggested part numbers MuRata CFU455X CFW455x suffix denotes bandwidth. resonator. Recommended part numbers Toko America RMC2A6597HM 5SVLC-0637BGT (smaller). evaluation board layout shown provides either resonator. Ceramic discriminator elements cannot used with MC3374 their input impedance. damping resistor value raised increase recovered audio lowered increase quadrature detector's bandwidth linearity practical limits approximately Typically quadrature detector's bandwidth should match filter's bandwidth. data buffer low-pass filter with corner frequency approximately audio buffer bandpass filter with corner frequencies kHz. audio amplifier provides bass suppression.
MOTOROLA ANALOG DEVICE DATA
MC3374
Freq. 10.7 0.68 0.22 Short 0.22 Open Open CC1/CC3 Open
Figure Recovered Audio versus Supply
RECOVERED AUDIO (mVrms) (dB)
Figure S+N, versus Input
INPUT (dBm)
1200 V17, VOLTAGE REGULATION (mV) 1000
Figure VREG versus Supply
V17, REGULATED OUTPUT (mVdc) 1140 1120 1100 1080 1060 1040 1020 1000
Figure Regulated Output Recovered Audio versus Temperature
RECOVERED AUDIO (mVrms) 18.0 17.5 17.0 16.5 16.0 15.5 15.0 14.5
AMBIENT TEMPERATURE (°C)
Figure Buffer Amplifier Gains versus Temperature
4.01 AUDIO BUFFER GAIN (V/V) 3.99 Avdb 3.97 Avab 3.95 3.93 3.91 2.93 2.88 3.03 2.98 DATA BUFFER GAIN (V/V)
2.83 2.78
AMBIENT TEMPERATURE (°C)
MOTOROLA ANALOG DEVICE DATA
MC3374
Figure MC3374 Pager Receiver Artwork COPPER LAYER (Actual View Surface Mount Side) COPPER LAYER (Caution: Reversed View Through-Hole Side)
Input
MC3374FTB
Enable Data Output Disable
COMPONENT LAYER
COMPONENT LAYER
3900
0.01 0.01
0.33 0.01 Data
0.022
0.22 Enable Disable
NOTE: Through Hole
MOTOROLA ANALOG DEVICE DATA
MC3374
CIRCUIT DESCRIPTION
MC3374 narrowband receiver capable operation MHz. voltage design yields power drain excellent sensitivity narrowband voice data link applications. typical application mixer amplifies incoming signal converts this frequency kHz. signal then filtered ceramic filter applied first intermediate frequency (IF) amplifier input, before passing through second ceramic filter. modulated signal then applied limiting amplifier detector circuitry. Modulation recovered conventional quadrature detector. typical modulation bandwidth available kHz. Features available include buffers audio/data amplification active filtering, board voltage regulator, battery detection circuitry with programmable level, receiver disable circuitry. MC3374 utility receiver used voice and/or narrowband data reception. especially suitable where extremely power consumption high design flexibility required. audio buffer noninverting amplifier with nominal voltage gain V/V. This buffer self-biasing input should coupled. buffers, when applied active filters, used together allow simultaneous audio very speed data reception. Another possible configuration receive audio only include noise-triggered squelch. comparator noninverting type with open collector output. Typically, pull-up resistor used between With comparator capable operation kHz. circuit self-biasing, input should coupled. regulator 1.07 reference capable sourcing This (Pin needs decoupled using capacitor maintain stability MC3374. three VCCs MC3374 (VCC, VCC2, VCC3) same supply voltage. typically decoupled using capacitors only. VCC2 VCC3 should bypassed using bypasses shown Figure Eliminating resistors VCC2 VCC3 bypasses possible some applications, reduction sensitivity quieting will likely occur. battery detection circuit gives open collector output which drops when MC3374 supply voltage drops below Typically would pulled resistor supply. Select pin, when connected MC3374 supply, programs battery detector trip Leaving this open raises trip voltage battery detector. receiver enable which connected normal operation. Connecting this ground shuts receiver reduces current drain
APPLICATION
MC3374 used high performance power dual conversion receivers. Because MC3374's extremely good sensitivity (0.6 (S+N/N, Figure 3)), also used stand alone single conversion narrowband receiver applications sensitive image frequency interference. preamplifier will likely needed overcome preselector losses. oscillator Colpitts type which must under crystal control. fundamental mode crystals choose resonators, parallel resonant, load. higher frequencies, overtone series mode type. coil resistor needed ensure proper operation. best adjacent channel sensitivity response occur when ceramic filters used, shown Figure Either replaced coupling capacitor reduce cost, some degradation sensitivity and/or stability suspected. detector quadrature type, with connection from limiter output detector input provided internally. tank circuit must provided externally. tank pins (Pin must decoupled using capacitor. damping resistor (see Figure determines peak separation detector (and thus bandwidth). Smaller values will increase separation bandwidth decrease recovered audio sensitivity. data buffer noninverting amplifier with nominal voltage gain V/V. This buffer needs bias (approximately provided externally else debiasing will occur. order Sallen-Key pass filter, shown Figure connecting recovered audio output data buffer input provides necessary bias some post detection filtering. buffer also used active filter.
APPENDIX
Design Order Sallen-Key Pass Filters
Input Bias
Pass Output
audio data buffers easily configured active pass filters using circuit configuration shown above. circuit center frequency (fo) quality factor given following:
R1R2C1C2
R2C2 R1C1
R1C2 R2C1
(1-K)
R1C1 R2C2
possible, simplify above equations. sure avoid negative value prevent instability. Setting filter response.
0.707 yields maximally flat
MOTOROLA ANALOG DEVICE DATA
MC3374
Data Buffer Design data buffer designed follows: 0.01 0.707 (target) (data buffer open loop voltage gain) Setting yields: Audio Buffer Design audio buffer designed follows: 3000 0.707 (target) (audio buffer open loop voltage gain) Setting yields:
2pC1 1R1R2
2pR1 1C1C2
(2-K)
(1-K)
Iteration yields (R1) make 0.707. Substitution into equation yields: (use 4.2(R1) 0.01
Iteration yields 2.65 (C1) make 0.707. Substitution into equation yields: 3900 2.65(C1) 0.01
Motorola reserves right make changes without further notice products herein. Motorola makes warranty, representation guarantee regarding suitability products particular purpose, does Motorola assume liability arising application product circuit, specifically disclaims liability, including without limitation consequential incidental damages. "Typical" parameters which provided Motorola data sheets and/or specifications vary different applications actual performance vary over time. operating parameters, including "Typicals" must validated each customer application customer's technical experts. Motorola does convey license under patent rights rights others. Motorola products designed, intended, authorized components systems intended surgical implant into body, other applications intended support sustain life, other application which failure Motorola product could create situation where personal injury death occur. Should Buyer purchase Motorola products such unintended unauthorized application, Buyer shall indemnify hold Motorola officers, employees, subsidiaries, affiliates, distributors harmless against claims, costs, damages, expenses, reasonable attorney fees arising directly indirectly, claim personal injury death associated with such unintended unauthorized use, even such claim alleges that Motorola negligent regarding design manufacture part. Motorola registered trademarks Motorola, Inc. Motorola, Inc. Equal Opportunity/Affirmative Action Employer.
MOTOROLA ANALOG DEVICE DATA
MC3374
OUTLINE DIMENSIONS
SUFFIX PLASTIC PACKAGE CASE 873-01 (Thin QFP) ISSUE
0.20 (0.008) 0.05 (0.002)
0.20 (0.008)
DETAIL
-A-,-B-,-DDETAIL
BASE METAL
0.20 (0.008) 0.05 (0.002) 0.20 (0.008)
DETAIL
-CSEATING PLANE
DATUM PLANE
0.20 (0.008)
0.01 (0.004)
SECTION
VIEW ROTATED CLOCKWISE MILLIMETERS 7.10 6.95 7.10 6.95 1.60 1.40 0.273 0.373 1.50 1.30 0.273 0.80 0.20 0.119 0.197 0.57 0.33 0.119 0.135 0.40 0.15 0.25 8.85 9.15 0.15 0.25 8.85 9.15 INCHES 0.274 0.280 0.274 0.280 0.055 0.063 0.010 0.015 0.051 0.059 0.010 0.031 0.008 0.005 0.008 0.013 0.022 0.220 0.005 0.005 0.016 0.006 0.010 0.348 0.360 0.006 0.010 0.348 0.360 0.039
-HDATUM PLANE
DETAIL
NOTES: DIMENSIONING TOLERANCING ANSI Y14.5M, 1982. CONTROLLING DIMENSION: MILLIMETER. DATUM PLANE LOCATED BOTTOM LEAD COINCIDENT WITH LEAD WHERE LEAD EXITS PLASTIC BODY BOTTOM PARTING LINE. DATUMS -A-, DETERMINED DATUM PLANE -H-. DIMENSIONS DETERMINED SEATING PLANE -C-. DIMENSIONS INCLUDE MOLD PROTRUSION. ALLOWABLE PROTRUSION 0.25 (0.010) SIDE. DIMENSIONS INCLUDE MOLD MISMATCH DETERMINED DATUM PLANE -H-. DIMENSION DOES INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL 0.08 (0.003) TOTAL EXCESS DIMENSION MAXIMUM MATERIAL CONDITION. DAMBAR CANNOT LOCATED LOWER RADIUS FOOT.
reach EUROPE Locations Listed: Motorola Literature Distribution; P.O. 20912; Phoenix, Arizona 85036. 1-800-441-2447 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, Seibu-Butsuryu-Center, 3-14-2 Tatsumi Koto-Ku, Tokyo 135, Japan. 03-81-3521-8315 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Ping Industrial Park, Ting Road, N.T., Hong Kong. 852-26629298
MOTOROLA ANALOG DEVICE DATA MC3374/D
*MC3374/D*
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