Amplifier M-ary Pagers (AFC Supported) Description CXA3179N curre
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CXA3179N
Amplifier M-ary Pagers (AFC Supported)
Description CXA3179N current consumption amplifier which employs newest bipolar process. suitable M-ary pagers using AFC. Features current consumption (typ. VCC=1.4 voltage operation VCC=1.1 Small package 24-pin SSOP Second mixer oscillator Needless decoupling capacitor Reference power supply operational amplifier comparator rate filter with variable cut-off current output circuit RSSI function input, standard Maximum input frequency Applications M-ary pagers Double conversion pagers Structure Bipolar silicon monolithic Block Diagram Configuration
CONT L.C. AUDIO RSSI
SSOP (Plastic)
Absolute Maximum Ratings Supply voltage Operating temperature Topr Storage temperature Tstg Allowable power dissipation Operating Condition Supply voltage
+150
B.S.
RSSI IF_LIM QUAD_DET FILTER LEVEL COMP
CONT
QUAD
Sony reserves right change products specifications without prior notice. This information does convey license implication otherwise under patents other right. Application circuits shown, any, typical examples illustrating operation devices. Sony cannot assume responsibility problems arising these circuits.
E96Y06A8Z
CXA3179N
Description Symbol voltage Equivalent circuit
Description
1.5k
Connects external parts crystal oscillator circuit. capacitor crystal oscillator connected these pins VCC.
Mixer output. Connect ceramic filter between this
1.5k 1.5k
Power supply.
limiter amplifier input.
CONT
Determines level comparator threshold value. Threshold value adjusted inserting resistor between VCC. Normally, short VCC.
current output.
QUAD
Connects phase shifter detector circuit.
CXA3179N
Symbol
voltage
Equivalent circuit
Description
Connects capacitor that determines cut-off.
140k
Switches cut-off. Cut-off decreased setting this high. (Applied voltage range -0.5 +7.0
RSSI
RSSI circuit output.
100k
Sets circuit current. current setting high.
L.C.
Level comparator, comparator comparator outputs. They open collectors. (Applied voltage range -0.5 +7.0
AUDIO
Level comparator comparator inputs. filter circuit output connected.
CXA3179N
Symbol
voltage
Equivalent circuit
Description
B.S.
140k
Controls battery saving. Setting this suspends operation (Applied voltage range -0.5 +7.0
100k
Controls time constant circuit. this high make short time constant. (Applied voltage range -0.5 +7.0
CONT
Output internal constant-voltage source amplifier. Connect base transistor. (Current capacity
Constant-voltage source output. Controlled maintain
4.16k 4.16k
Ground
Mixer input.
CXA3179N
Electrical Characteristics (VCC=1.4 Ta=25 FS=21.7 MHz, FMOD=1.6 kHz, FDEV=4.8 kHz, AMMOD=30 Item Current consumption Current consumption rejection ratio output saturation voltage output leak current hysteresis width output current output saturation voltage voltage operating voltage output leak current output saturation voltage Detector output voltage Logic input voltage high level Logic input voltage level Limiting sensitivity Detector output level ratio deviation level comparator window width Level comparator output saturation voltage Level comparator output leak current RSSI output offset Mixer input resistance Mixer output resistance limiter input resistance Symbol ICCS AMRR VSATNRZ ILNRZ VTWNRZ IOUT VSATVB VREG VLVA ILLVA VSATLVA VODET VTHBSV VTLBSV (LIM) Conditions Measurement circuit Measurement circuit Measurement circuit Measurement circuit Measurement circuit Measurement circuit Vin=0.1 Measurement circuit Measurement circuit Output current Measurement circuit V1=1.4 Measurement circuit Measurement circuit Measurement circuit Measurement circuit Data filter fc=2.4 V2=1.0 V2=0 Vin=0.3 Vin=0.1 Min. 0.95 1.00 V1=1.0 Typ. 1.00 1.05 -108 Max. 1.35 1.05 1.10 0.35 Unit
mVrms
VLCWR
When shorted
VSATLC ILLC VORSSI RINLIM ROUTMIX RINLIM
Measurement circuit Measurement circuit Measurement circuit
CXA3179N
Electrical Characteristics Measurement Circuit
120p 1000p
1.8µ
1.4V
1.4V
8.2k
1200p 1200p
1200p
Measurement circuit
Measurement circuit
100k
50µA
1.4V
1.4V
Measurement circuit
Measurement circuit
100µA 0.5V
100k
1.4V
1.0V
Measurement circuit
Measurement circuit
CXA3179N
50µA
100k
0.2V
1.4V
1.4V
Measurement circuit
Measurement circuit
50µA
100P
0.1V
1.4V
1.4V
Measurement circuit
Measurement circuit
Application Circuit
LEVEL RSSI AUDIO
0.01µ
100k
100k
1.8µH
1000P
VB_REG COMP LEVEL COMP QUAD_DET IF_LIM FILTER
RSSI
AUDIO COMP
XTAL
CERAFIL
DISK
6.8K
1100P (100P+1000P)
1420P (1200P+220P)
680P
0.01µ
CXA3179N
Application circuits shown typical examples illustrating operation devices. Sony cannot assume responsibility problems arising these circuits infringement third party patent other right same.
1000P
100k
120P
CXA3179N
Application Notes Power Supply CXA3179N, with built-in regulator, designed permit stable operation wide range supply voltage from Decouple wiring (Pin close possible. Oscillator Input Oscillator input method Using Pins input self-excited oscillation signal through composition Colpitts type crystal oscillator circuit. Directly input local oscillation signal
Ceramic filter
Ceramic filter
From local signal
Fig. Mixer mixer double-balance type. input pin. Input though suitable matching circuit. input impedance serves output mixer, load resistance incorporated. Filter filter connected between this mixer output limiter amplifier input should have following specifications. impedance Band width Changes according applications. Limiter Amplifier gain this limiter amplifier approximately Take notice following points making connection limiter amplifier input (Pin Wiring limiter amplifier input (Pin should short possible. limiter amplifier output appears QUAD (Pin wiring ceramic discriminator connected QUAD should short possible reduce interference with mixer output limiter amplifier input.
Wire short apart possible
short possible
Fig.
CXA3179N
Quick Charge order hasten rising time from when power turned CXA3179N features quick charge circuit. capacitance value connected should chosen such that voltage does vary much discharge during battery saving. Connect signal controlling quick charge circuit Setting this high enables quick charge mode, setting this enables steady-state reception mode. Quick charge used when power supply turned battery saving must high time. Connect when quick charge being used.
Power supply (Pin
Quick charge (Pin
Battery saving control (Pin
Fig.
Example when capacitance value Fig. 2-level data setting time after quick charge Fig. 4-level data setting time after quick charge less Fig. 4-level data obtained Fig. 2-level data obtained
-10-
CXA3179N
Detector detector quadrature type. perform phase shift, connect ceramic discriminator phase shifting capacitor quadrature detector incorporated. (FSK) signal demodulated with detector will output AUDIO (Pin through internal LPF. AUDIO output anti-phase output OUT. CDBM455C50 (MURATA MFG. CO., LTD.) ceramic discriminator recommended CXA3179N. 2-level system, CDBM455C28 also used.
6.5k Ceramic discriminator CDBM455C50
Fig. detector output level changed according resistance value connected
Filter Buffer, Level Comparator Comparator circuit built this output connected internally comparator, level comparator quick charge circuit.
L.C. 0.2V
Fig. Using LPF, remove noise from demodulated signal input signal above three circuits.
-11-
CXA3179N
Constant composition data filter ternary. first-stage cut-off 2C11R
second-stage cut-off 2RC12
C11, C12,
External capacitance shown Application Circuit internal resistance
Butterworse characteristic C12=C13=C14.
approximately when low. table below shows example constants data rate. Capacitance (pF) 6800 1500 PIN9 1100 PIN10 PIN11 1420 PIN9 1100 PIN10 PIN11 1420 (Hz) 1900 1000 2000 1000 2000 Data rate levels) 1200 levels) 2400 levels) 1600 levels) 3200 levels) 3200 levels) 6400 levels)
Comparator Output level comparator comparator shape waveform this input signal output square wave. comparator output stage open collector. Thus, CMOS type supply voltage different, direct interface illustrated figure below implemented.
1.4V
filter switch
CMOS power supply
(15) Comparator output CMOS
Fig. -12-
CXA3179N
Level Comparator Output level comparator characteristics shown figure below. Therefore, high signal output border even input signal ±4.8 signal. This high output interval varies according frequency response rate filter, widens cut-off frequency becomes lower. decoder avoids this high interval when processing data.
Input signal
Output
-4.8 -1.6 +1.6 +4.8 Level comparator output
Input frequency deviation [kHz]
CONT Controls base bias external transistors. This goes high (open) when supply voltage becomes lower. Since output open collector, used directly drive CMOS device. setting voltage 1.05 (typ.), possesses hysteresis with respect supply voltage. hysteresis width (typ.). B.S. Operation CXA3179N halted setting this low. This connected directly CMOS device. current consumption battery saving less
B.S.
Fig.
-13-
CXA3179N
M-ary (M=2- 4-level) Demodulation System 12)-1. Output Waveform Polarity discrimination output level comparator output used demodulate 4-level waveform shown below. [4-level demodulating waveform]
+4.8kHz
+1.6kHz
-1.6kHz
-4.8kHz
[NRZ OUT] Polarity discrimination output
(When input frequency higher than local frequency)
polarity inverted setting local frequency higher than input frequency.
[L.C. OUT] Level comparator output
1.6kHz
4.8kHz
4-level demodulating data divided into L.C. shown above. Here, corresponds conventional comparator output. L.C. made comparing demodulated waveform amplitude internal reference voltage levels. When threshold value L.C. appropriate detector output, resistance value should varied detector output level adjustment resistor should inserted between level comparator threshold value adjustment. 2-level demodulation, corresponds conventional comparator output.
-14-
CXA3179N
12)-2. 4-level Signal Threshold Value demodulated signal optimally matched comparator threshold value applying (see AFC). (operation point correction using feedback loop filter) comparator threshold value fixed. level comparator threshold value adjusted varying detector output level changing damping resistance discriminator. gain adjustment)
Level comparator threshold value threshold value=Demodulated signal average voltage Level comparator threshold value
gain adjustment 12)-3. Offset Amount Threshold Value Immediately after power-on when capacitor charged with correction voltage, input frequency offset, some time required correct this offset. addition, times required obtain 2-level 4-level data differ according offset amount. 2-level signals case 2-level signals, correct data obtained when offset amount smaller than detector output amplitude. This less when detector output level mVp-p which corresponds within ±4.8 when converted frequency curve. Thus, 2-level data obtained without operation point correction time when frequency offset within ±4.8 kHz.
threshold value offset
4-level signals case 4-level signals, correct data obtained when offset amount less than detector output amplitude (during ±4.8 DEV). This less when detector output level mVp-p which corresponds ±1.6 less when converted frequency curve. Thus, 4level data obtained without operation point correction time when frequency offset within ±1.6
Level comparator threshold value threshold value offset Level comparator threshold value
shown above, 4-level signals have allowable offset range that 2-level signals. When offset exceeds this allowable range, time required determine operation point obtain correct data through feedback. Also, even offset within allowable range, output pulse duty changes until offset -15-
CXA3179N
current output type which outputs frequency deviation form current converts voltage. output current range approximately ±0.4 slow mode fast mode. circuit connected with this should have higher impedance. operating range between approximately (VCC -0.2) buffer amplifier expand operating range.
AUDIO COMP Vref V=it/C CXA3179N curve voltage)
Vref
External parts
voltage continues change till value reaches Vref value. When these values equal, output current becomes voltage determined charge time. Therefore, voltage undefined. voltage varies, example, shown below characteristics. voltage follows characteristics because this voltage independent slope curve. other words, CXA3179N operates according characteristics when characteristics have linearity with respect voltage characteristics controlled within range shown graph below.
(VCC-0.2)V
voltage
0.1V Input frequency
-16-
CXA3179N
Sensitivity Adjustment Method constants shown Application Circuit standard external parts. However, adjustment necessary depending conditions use, characteristics external parts, system circuit decoder connected etc. Adjust sensitivity according following procedures. matching When using matching circuit between system circuit CXA3179N, adjust trimmer obtain optimal sensitivity while monitoring AUDIO output. Local input level mixer circuit gain dependent local signal input level input level should high possible within range shown graph "Local input level Mixer gain characteristics". However, care should taken raising input level above will cause sensitivity drop. When creating local signal using internal oscillator circuit, oscillation level varies according external capacitances attached Pins characteristics used crystal. Therefore, sure adjust external capacitance values attached Pins according crystal characteristics.
have following range figure above. =5C2 ratio oscillation stabilizes approaches equality with oscillation level decreases values become larger, increases values become smaller. probe confirm local input level. constant data filter cut-off need changed depending characteristics connected decoder. Adjust capacitance values Pins while checking incoming sensitivity including decoder. capacitance values large, detector output waveform will deviate high data rates, causing sensitivity drop. Conversely, capacitance values small, will easily affected noise, causing sensitivity drop. Adjust capacitance values Pins that capacitance value described "8)-1. Constant" becomes smaller.
-17-
CXA3179N
Detector output level comparator level comparator threshold values fixed CXA3179N. case 4level signals, relationship between level comparator threshold value detector output level affects sensitivity. detector output level adjusted resistance attached Increasing resistance value also increases output level, vice versa. resistance value differs according ceramic discriminator attached When discriminator changed different type, resistance value must adjusted. Adjust resistance value while monitoring level comparator output waveform sensitivity including decoder. CXA3179N uses correct frequency deviation. When frequency deviation amount large, correction takes time lower sensitivity. Adjust oscillator frequency local oscillator that center frequency signal input close possible. CXA3179N Standard Board Description Outline This board contains external parts shown Application Circuit order evaluate CXA3179N operation Features following CXA3179N basic operations checked. Varying data filter cut-off Battery saving other mode switching output level comparator output pins serves output AFC. Method Input CXA3179N supply voltage VCC=1.4. This operates with single power supply. CXA3179N uses 21.245 crystal. Input signal from this condition where IF=455 kHz. voltage undefined with itself because current output circuit employed AFC. evaluation, sure apply bias externally make loop. mode switches. Mode switch setting Mode switches provided four locations board. Each basic operation confirmed switching these mode switches while referring board layout. table "15) Control Pins" mode switching. Device specification these specifications specifications. this evaluation board specification. Circuit diagram circuit diagram same Application Circuit these Specifications. -18-
CXA3179N
Standard Board Layout
XTAL
DISK
CERAFIL
3179 EVALUATION BOARD
Mode Switch Pattern
Slow charge
Sleep
operation
High
Quick charge
B.S.
operation
AFC-OFF
High
-19-
CXA3179N
List Standard Board Parts Value Part Remarks (Manufacture) Note
Resistor
(RIVER)
series 1/8W
Capacitor 1000 1100 1420 0.01 TZ03P450FR169 (MURATA PRODUCTS) TRIMMER CAPACITOR
DD100 series temperature characteristics type (MURATA PRODUCTS)
CERAMIC CAPACITOR series (high dielectric constant type)
(SHIN-EI TUSHIN KOGYO CO., LTD.) (SHIN-EI TUSHIN KOGYO CO., LTD.)
ELECTROLYTIC CAPACITOR series
Inductor EL0405 (TDK Products) series pitch (Lead Pitch)
Active Component 2SA1015 (TOSHIBA CORPORATION)
Crystal 21.245 XTAL NR-18BN (NIHON DEMPA KOGYO CO., LTD.)
-20-
CXA3179N
Ceramic Filter CERAFIL CFWS455D (MURATA PRODUCTS)
Ceramic Discriminator DISC CDBM455C50 (MURATA PRODUCTS)
Switch Connector HRM300-25 (HIROSE ELECTRIC CO., LTD.) CONNECTOR ATE1D-2M3-10 (FUJISOKU CORPORATION) ON-ON poles)
test ST-1-3 (Mac eight) test LC-2-G (Mac eight) L=10
-21-
CXA3179N
Example Representative Characteristics
Mixer input audio response RSSI characteristics S+N+D
1000
RSSI 21.7MHz LOCAL 21.245MHz -6dBm Audio 1.6kHz Dev. 4.8kHz 63.1mVrms 1.4V 25°C
Audio response [dB]
-120 -110 -100 Mixer input level [dBm]
Current consumption characteristics
Mixer characteristics intercept point
Current consumption [mA]
Output level [dBm]
fO=21.7MHz fLO=21.245MHz -6dBm f1=21.725MHz f2=21.750MHz level values read with spectrum analyzer Mixer input level [dBm]
Supply voltage
-22-
RSSI [mV]
CXA3179N
Local input level Mixer gain characteristics
Mixer gain [dB]
21.7MHz -60dBm 21.245MHz 0.01µ
Local input level [dBm]
Variable cut-off characteristics audio filter voltage
Response [dB]
Input frequency [Hz] Level comparator characteristics
Comparator output voltage [mV]
Comparator input voltage [mV]
-23-
CXA3179N
Level comparator threshold value control characteristics (Output high switching level) Representative example using typical sample
Level comparator threshold value [mV]
Typical value when shorted current [µA]
comparator characteristics
Comparator output voltage
Comparator input voltage [mV]
characteristics
comparator output voltage
1.00 1.05 Supply voltage 1.10 1.15
-24-
CXA3179N
RSSI output voltage temperature characteristics
RSSI output voltage characteristics [mV]
-20°C 25°C 50°C 75°C -110 -100 input level [dBm]
-120
Detector output level level comparator threshold value temperature characteristics 4.8kHz Dev. detector output level
Detector output level level comparator threshold value [mV]
Level comparator threshold value positive side
1.6kHz Dev. detector output level
Level comparator threshold value negative side
-100 Temperature [°C]
-25-
CXA3179N
output current characteristics
FAST SLOW input frequency [kHz] curve characteristics
Fast current [µA]
Audio output voltage [mV]
input frequency [kHz]
-26-
Slow current [µA]
CXA3179N
Package Outline
Unit
24PIN SSOP(PLASTIC)
1.25
0.13 0.65
0.05 0.15 0.02
DETAIL SOLDER
(0.15)
(0.22)
b=0.22 0.03
DETAIL PALLADIUM
NOTE: Dimension does include mold protrusion. DETAIL
PACKAGE STRUCTURE
PACKAGE MATERIAL EPOXY RESIN SOLDER/PALLADIUM PLATING 42/COPPER ALLOY 0.1g LEAD TREATMENT LEAD MATERIAL PACKAGE MASS
SONY CODE EIAJ CODE JEDEC CODE
SSOP-24P-L01 SSOP024-P-0056
NOTE PALLADIUM PLATING This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame).
-27-
0.03 0.15 0.01
b=0.22 0.05
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