Amplifier M-ary Pagers Description CXA3117AN current consumption
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CXA3117AN
Amplifier M-ary Pagers
Description CXA3117AN current consumption amplifier which employs newest bipolar process. suitable M-ary pagers. Features current consumption: 1.1mA (typ. 1.4V) voltage operation: 4.0V Small package 24-pin SSOP Second mixer oscillator Needless decoupling capacitor Reference power supply operational amplifier comparator rate filter with variable cut-off Misoperation prevention function continuous data RSSI function input, standard Quick charge detector output sense method Applications M-ary pagers Double conversion pagers Block Diagram Configuration
CONT
SSOP (Plastic)
Structure Bipolar silicon monolithic Absolute Maximum Ratings Supply voltage Operating temperature Storage temperature Allowable power dissipation Operating Condition Supply voltage
Topr Tstg +150
CHARGE
AUDIO
L.C.
B.S.
RSSI
CHARGE
LEVEL COMP
QUAD_DET IF_LIM FILTER
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.
CONT
E97220A8Z
QUAD
RSSI
CXA3117AN
Description Symbol voltage Equivalent circuit
Description
1.4V
Connects external parts crystal oscillator circuit. capacitor crystal oscillator connected these pins VCC.
0.7V
1.5k
1.3V
Mixer output. Connect 455kHz ceramic filter between this
1.5k 1.5k
Power supply.
1.4V
limiter amplifier input.
CONT
Determines level comparator threshold value. Threshold value adjusted inserting resistor between VCC. Normally, short VCC.
0.2V
Connects capacitor that determines cut-off frequency entire system.
CXA3117AN
Symbol
voltage
Equivalent circuit
Description
QUAD
1.4V
Connects phase shifter detector circuit.
0.2V
Connects capacitor that determines cut-off.
140k
Switches cut-off. Cut-off decreased setting this high. (Applied voltage range: -0.5V +7.0V)
RSSI
0.1V
RSSI circuit output.
100k
Sets quick charge circuit current. charge current setting high.
CXA3117AN
Symbol
voltage
Equivalent circuit
Description
L.C.
Level comparator, comparator comparator outputs. They open collectors. (Applied voltage range: -0.5V +7.0V)
AUDIO
0.2V
Level comparator comparator inputs. filter circuit output connected.
B.S.
140k
Controls battery saving. Setting this suspends operation (Applied voltage range: -0.5V +7.0V)
CHARGE
100k
Controls speed quick charge circuit. this high execute quick charge. (Applied voltage range: -0.5V +7.0V)
CONT
Output internal constant-voltage source amplifier. Connect base transistor. (Current capacity: 100µA)
1.0V
Constant-voltage source output. Controlled maintain 1.0V.
Ground
CXA3117AN
Symbol
voltage
Equivalent circuit
4.16k 4.16k
Description
1.4V
Mixer input.
Electrical Characteristics (VCC 1.4V, 25°C, 21.7MHz, FMOD 1.6kHz, FDEV 4.8kHz, AMMOD 30%) Item Current consumption Current consumption rejection ratio Symbol ICCS AMRR Conditions Measurement circuit 1.0V Measurement circuit Measurement circuit Measurement circuit 0.3V Measurement circuit 0.1V Measurement circuit 0.3V Measurement circuit Measurement circuit Output current Measurement circuit 1.0V Measurement circuit 1.0V Measurement circuit Measurement circuit Measurement circuit Data filter 2.4kHz When shorted Min. 0.95 1.05 Typ. 1.00 1.10 -108 Max. 1.35 1.05 1.15 0.35 Unit mVrms
output saturation voltage VSATNRZ 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 ILNRZ VTWNRZ IOUT VSATVB VREG VLVA ILLVA VSATLVA VODET VTHBSV VTLBSV (LIM)
VLCWR
VSATLC ILLC VORSSI RINLIM ROUTMIX RINLIM
Measurement circuit Measurement circuit Measurement circuit
CXA3117AN
Electrical Characteristics Measurement Circuit
120p 1.8µ 1000p
1.4V
1.4V
1200p 1200p
8.2k
1200p
Measurement circuit
Measurement circuit
100k
50µA
1.4V
1.4V
Measurement circuit
Measurement circuit
CXA3117AN
100µA 0.5V
100k
1.4V
1.0V
Measurement circuit
Measurement circuit
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
0.01µ 100k 100k 100k
AUDIO L.C. CHG_
120p 100p
1.8µH
1000p
NRZ_ CHARGE COMP
CHARGE QUAD_DET IF_LIM FILTER
LEVEL COMP
RSSI
FIL_SW
6.8k CERAFIL 0.01µ DISC
1100p
(100p 1000p)
680p
1420p
(1200p 220p)
XTAL
CXA3117AN
Application circuits shown typical examples illustrating operation devices. Sony cannot assume responsibility problems arising these circuits infringement third party patent other right same.
AUDIO
CXA3117AN
Application Note Power Supply CXA3117AN, with built-in regulator, designed permit stable operation wide range supply voltage from 4.0V. Decouple wiring (Pin close possible. Oscillator Input Oscillator input method Using Pins input self-excited oscillation signal through composition Colpitts type crystal oscillator circuit. Connect capacitors attached crystal VCC. 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 2.0k. serves output mixer, load resistance 1.5k incorporated. Filter filter connected between this mixer output limiter amplifier input should have following specifications. Connect ground filter VCC. impedance 1.5k ±10% Bandwidth Changes according applications. Limiter Amplifier gain this limiter amplifier approximately 100dB. 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.
CXA3117AN
Quick Charge order hasten rising time from when power turned CXA3117AN features quick charge circuit. Therefore, quick charge circuit eliminates need insert capacitor between detector output case with conventional ICs, capacitor should connected determine average signal level during steady-state reception. 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 When input frequency offset within ±4.8kHz: Fig. 4-level data setting time after quick charge When input frequency offset within ±1.6kHz less: When input frequency offset within ±3kHz less: 500ms less Fig. 4-level data obtained Fig. 2-level data obtained
CXA3117AN
Detector detector quadrature type. perform phase shift, connect ceramic discriminator phase shifting capacitor quadrature detector incorporated. (FSK) signal demodulated with detector output AUDIO (Pin through internal primary LPF. AUDIO output anti-phase output OUT. CDBM455C50 (MURATA MFG. CO., LTD.) ceramic discriminator recommended CXA3117AN. 2-level system, CDBM455C28 also used.
6.8k 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.
0.2V
Fig. Using LPF, remove noise from demodulated signal input signal above three circuits.
CXA3117AN
8)-1. Constant data filter cut-off (fc) expressed with following equation. 2C11R
C13: External capacitance (Pin internal resistance approximately when low. table below shows example constants data rate. Capacitance (pF) filter switch 1500 1100 1420 1100 1420 6800 (Hz) 1900 1000 2000 1000 2000 Data rate 512bps levels) 1200bps levels) 2400bps levels) 1600bps levels) 3200bps levels) 3200bps levels) 6400bps levels)
8)-2. 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 CMOS power supply
(15) Comparator output CMOS
Fig.
CXA3117AN
8)-3. Level Comparator Output level comparator characteristics shown figure below. Therefore, high signal output border even input signal ±4.8kHz 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 low. Since output open collector, used directly drive CMOS device. setting voltage 1.10V (typ.), possesses hysteresis with respect supply voltage. hysteresis width 10mV (typ.). B.S. Operation CXA3117AN halted setting this low. This connected directly CMOS device. current consumption during battery saving 10µA less 1.4V).
B.S.
Fig.
CXA3117AN
M-ary 4-level) Demodulation System 12)-1. Output Waveform Polarity discrimination output 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)
(The polarity inverted setting local frequency higer than input frequency.)
[L.C. OUT] 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.
CXA3117AN
12)-2. 4-level Signal Threshold Value Sony pager ICs, demodulated signal optimally matched comparator threshold value curve correction operation described shown figure below. (operation point correction using feedback loop filter)
Level comparator Offset correction circuit Detector output comparator
Level comparator
Operation point correction (The comparator threshold value fixed.) level comparator threshold value adjusted varying detector output level, which achieved varying discriminator dumping resistance. gain adjustment)
Level comparator threshold value threshold value Demodulated signal average voltage Level comparator threshold value
gain adjustment
CXA3117AN
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 75mV less when detector output level 150mVp-p which corresponds within ±4.8kHz when converted frequency curve. Thus, 2-level data obtained without operation point correction time when frequency offset within ±4.8kHz.
threshold value offset
4-level signals case 4-level signals, correct data obtained when offset amount less than detector output amplitude (during ±4.8kHz DEV). This 25mV less when detector output level 150mVp-p which corresponds ±1.6kHz less when converted frequency curve, Thus, 4level data obtained without operation point correction time when frequency offset within ±1.6kHz.
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
CXA3117AN
Principle Quick Charge Operation Fig. detector buffer amplifier COMP level comparator comparator. CXA3117AN feedback loop from comparator input input circuit detector output buffer. This equalizes average value comparator input voltage reference voltage, with quick charge circuit being feedback loop. Switching current quick charge circuit enables reduction rise time. this block, comparator which compares input voltages outputs current based this comparison. current switched between high When power turned switch current high increase charge current Fig. shorten time constant. During steady-state reception mode, switch current low, lengthening charge time constant allowing stable data retrieval. Also, controlling make current off. This effective when same data received continuously.
AUDIO COMP
Reference voltage
Fig. 13)-1. Slow Charge Mode Quick Charge Mode During slow charge mode Quick Charge Mode, system frequency deviated, etc., demodulated output offset voltage, feedback applied correct this offset voltage. Here, feedback applied that average value audio output voltage matches internal regulator voltage. This feedback shifts curve down parallel manner.
Offset Reference voltage
curve curve Reference voltage
When system frequency deviated, there correction offset occurs.
Input signal
During slow charge mode, curve shifts correct offset.
Input signal
CXA3117AN
Curve Characteristics Even input signal frequency deviated, feedback applied AUDIO operating point match comparator reference voltage quick charge operation shown Fig. Therefore, this feedback must halted order evaluate curve characteristics. execute evaluation, measure average voltage first input this voltage from external power supply. Control Pins function controls shown below. Symbal Function Input high Input Data filter cut-off control High B.S. CHARGE
charge current Battery saving mode charge speed control control control Quick charge Slow charge operation Slow charge Slow charge operation Sleep
Note) control should performed with low. When each function controlled externally, state with asterisk
Misoperation Prevention Function Continuous Data offset comparator threshold value detector output canceled with feedback loop indicated paragraph 13). This operation assumes that equal numbers data. offset occurred when data received continuously. this case, setting high make charge current prevents offset occurrence. Without using this function, stability same data continuously received depends capacitance value shown paragraph 13). When this capacitance value increased, data demodulated more stably; however, takes more time rise. this function used, sure connect GND.
Reception signal
Sync part
Data
Sync part
Data
(Pin
Fig.
CXA3117AN
Capacitance Value Charge Time, Hold Time capacitance feedback loop time constant curve. This determines detector output frequency cut-off, rise characteristics operating voltage hold characteristics during battery saving. When capacitance reduced: detector output frequency cut-off becomes higher. rise characteristics become faster. operating voltage hold characteristics during battery saving become shorter. these, little effect FSK, capacitance value that matches used system should selected consideration 17)-1. Example Rise Characteristics Immediately After Power-on
When capacitance
[kHz]
Offset frequency (after power-on until 4-level data obtained)
17)-2. Example Operating Voltage Hold Characteristics When capacitance 1µF, curve hold voltage variation value that effect rise 4-level data after minutes battery saving shown below. Offset voltage after minutes battery saving: 10mV less
CXA3117AN
Sensitivity Adjustment Method constants shown Application Circuit diagram 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 CXA3117N, 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 +2dBm shown graph "Local input level Mixer gain characteristics". However, care should taken raising input level above +2dBm 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. 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 "16) Constant" becomes smaller.
CXA3117AN
Detector output level comparator level comparator threshold values fixed CXA3117AN. 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. Quick charge circuit CXA3117AN feedback circuit that corrects detector output operation point order correct frequency deviation. When frequency deviation amount large, correction takes time lower sensitivity. Adjust oscillator frequency local oscillator that center frequency signal input close 455kHz possible. CXA3117AN Standard Board Description Outline This board contains external parts shown Application Circuit order evaluate CXA3117AN operation. Features following CXA3117AN basic operations checked. Varying data filter cut-off Battery saving other mode switching output level comparator output pins Method Input CXA3117AN supply voltage 1.4V. CXA3117AN operates with single power supply. CXA3117AN uses 21.245kHz crystal. Input signal from CXA3117AN condition where 455kHz. mode switches. Mode switch setting Mode switches provided four locations board. Each basic operation confirmed switching these mode switches while referring board layout. table Control Pins mode switching. Device specifications these Specifications specifications. this evaluation board specification. Circuit diagram circuit diagram same Application Circuit diagram these Specifications.
CXA3117AN
19)-1. Standard Board Layout
XTAL
DISC
3117 EVALUATION BOARD
CERAFIL
19)-2. Mode Switch Description
Slow charge
Sleep
Slow charge operation
High
Quick charge
operation
Slow charge
CHARGE
CHG-OFF
High
CXA3117AN
19)-3. List Standard Board Parts VALUE PART# REMARKS (MANUFACTURE) NOTE
Resistor 8.7k 100k (RIVER) series 1/8W
Capacitor 120p 100p 1000p 1200p (SHIN-EI TUSHIN KOGYO CO., LTD.) (SHIN-EI TUSHIN KOGYO CO., LTD.) ELECTROLYTIC CAPACITOR series DD100 series temperature characteristics type (MURATA PRODUCTS) CERAMIC CAPACITOR series (high dielectric constant type) TZ03P450FR169 (MURATA PRODUCTS) TRIMMER CAPACITOR
0.01µ
Inductor 1.8µH EL0405 (TDK Products) series 2.5mm pitch (Lead Pitch)
Active Component 2SA1015 (TOSHIBA CORPORATION)
Crystal 21.245MHz XTAL (KINSEKI, LTD.)
CXA3117AN
Ceramic Filter CERAFIL CFWS455D (MURATA PRODUCTS) 455kHz 1.5k
Ceramic Discriminator DISC CDBM455C50 (MURATA PRODUCTS) 455kHz
Switch ATE1D-2M3-10 (FUJISOKU CORPORATION) poles)
Connector HRM300-25 (HIROSE ELECTRIC CO., LTD.) CONNECTOR
test ST-1-3 (Mac eight) test LC-2-G (Mac eight) 10mm
CXA3117AN
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]
21.7MHz 21.245MHz -6dBm 21.725MHz 21.750MHz level values read with spectrum analyzer
Supply voltage
Mixer input level [dBm]
RSSI [mV]
CXA3117AN
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]
CXA3117AN
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
1.05 1.10 1.15 Supply voltage 1.20
CXA3117AN
Quick charge circuit output current characteristics
215mV fixed
Fast mode
Slow mode
slow current [µA]
Slow mode
-0.3
-0.5
input voltage [mV]
RSSI output voltage temperature characteristics
RSSI output voltage characteristics [mV]
-20°C 25°C 50°C 75°C -110 -100 input level [dBm]
-120
fast current [µA]
CXA3117AN
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]
CXA3117AN
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).
0.03 0.15 0.01
b=0.22 0.05
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