Amplifier M-ary Pagers Description CXA3107N current consumption a

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Amplifier M-ary Pagers Description CXA3107N current consumption a

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CXA3107N
Amplifier M-ary Pagers
Description CXA3107N current consumption amplifier which employs newest bipolar process. suitable M-ary pagers. Features current consumption: (typ. VCC=1.4 voltage operation: VCC=1.1 Small package 20-pin SSOP Needless decoupling capacitor Reference power supply operational amplifier comparator rate filter with variable cut-off Misoperation prevention function continuous data RSSI function input, standard Applications M-ary pagers Function Plastic Structure Bipolar silicon monolithic SSOP (Plastic)
Absolute Maximum Ratings (Ta=25 Supply voltage Operating temperature Topr Storage temperature Tstg +150 Operating Condition Supply voltage
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.
E96303-TE
Block Diagram
CONT RSSI
LEVEL
CHARGE
REGULATOR
ALARM
COMP
QUICK CHARGE
LEVEL COMP
QUAD CONT DISK CONT FILTER AUDIO
CXA3107N
CXA3107N
Description Symbol voltage Equivalent circuit
1.5k
Description
1.5k
limiter amplifier input.
Ground. Determines level comparator threshold value. threshold value adjusted inserting resistor between VCC. Normally, short VCC.
CONT
Connects capacitor that determines cut-off frequency entire system.
DISK
Connects phase shifter detector circuit.
100k
Sets quick charge circuit current. charge current setting high.
CXA3107N
Symbol
voltage
Equivalent circuit
Description
Connects capacitor that determines cut-off.
AUDIO
Level comparator comparator inputs. operational amplifier output connected.
LEVEL
Level comparator, comparator comparator outputs. They open collectors. (Applied voltage range: -0.5 +7.0
RSSI
RSSI circuit output.
140k
Switches cut-off. Cut-off decreased setting this high. (Applied voltage range: -0.5 +7.0
CXA3107N
Symbol
voltage
Equivalent circuit
Description
B.S.
140k
Controls battery saving. Setting this suspends operation (Applied voltage range: -0.5 +7.0
CHARGE
100k
Controls charge speed quick charge circuit. this high execute quick charge. (Applied voltage range: -0.5 +7.0
CONT
Output internal constantvoltage source amplifier. Connects base transistor. (Current capacity:
Constant-voltage source output. Controlled maintain
Power supply.
CXA3107N
Electrical Characteristics Item Current consumption Current consumption rejection ratio
(VCC=1.4 Ta=25 FS=455 kHz, FMOD=1.6 kHz, FDEV=4.8 kHz, AMMOD=30 Symbol ICCS AMRR VSATNRZ ILNRZ VTWNRZ IOUT VSATVB VREG VLVA ILLVA VSATLVA VODET VTHBSV VTLBSV (LIM) VLCWR VSATLC ILLC VORSSI RINLIM Conditions Measurement circuit V2=1.0 Measurement circuit V2=0 Measurement circuit Measurement circuit Vin=0.3 Measurement circuit Vin=0.1 Measurement circuit Vin=0.1 Measurement circuit Measurement circuit Output current Min. 0.92 1.00 Typ. 0.96 1.05 Max. 1.02 1.10 0.35 Unit mVrms
output saturation voltage output leak current hysteresis width output current output saturation current 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 limiter input resistance
Measurement circuit V1=1.4 Measurement circuit 1=1.0 Measurement circuit Measurement circuit Measurement circuit data filter fc=2.4 Measurement circuit Measurement circuit Measurement circuit
Electrical Characteristics Measurement Circuit
1.4V
1.4V
100k
1.4V
Measurement circuit Measurement circuit
Measurement circuit
0.01µ 8.2k 1200p 1200p 1200p
0.5V 100µ 1.4V 1.4V 1.0V
1.4V
100k
Measurement circuit
Measurement circuit
Measurement circuit
CXA3107N
1.4V
1.4V
1.4V
100k
Measurement circuit
Measurement circuit
Measurement circuit
0.2V
0.1V
100p CXA3107N
1.4V
Measurement circuit
0.1V
RSSI
P201
0.01µ
0.01µ
100k
100k
CHARGE COMP RSSI COMP LEVEL COMP
1200p
1200p
DISK
8.2k
0.01µ
1200p
CXA3107N
Application circuits shown typical examples illustrating operation devices. Sony cannot assume responsibility problems arising these circuits infringement third party patent other right same.
AUDIO
P203
CHARGE QUAD
FILTER
100p
100k
AUDIO
0.01µ
P202
LEVEL
Block Diagram Application Circuit
CXA3107N
Application Note Power Supply CXA3107N, with built-in regulator, designed permit stable operation wide range supply voltage from Decouple wiring (Pin close possible. 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 interface with mixer output limiter amplifier input.
short possible
Fig. Quick Charge order hasten rising time from when power turned CXA3107N 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.
Timing Power supply (Pin Quick charge (Pin Battery save (Pin active battery saving
Fig.
-10-
CXA3107N
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 CXA3107N. 2-level system, CDBM455C28 also used.
8.2k Ceramic discriminator CDBM455C50
Fig. 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. 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
(11) Comparator output CMOS
Fig. CONT Controls base bias external transistors.
-11-
CXA3107N
goes high (open) when supply voltage becomes low. 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 CXA3107N halted setting this low. This connected directly CMOS device. current consumption battery saving less
B.S.
Fig. M-ary 4-level) Demodulation System 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
-12-
CXA3107N
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.
Principle Quick Charge Operation Fig. detector buffer amplifier operational amplifier used construct LPF. COMP level comparator comparator. CXA3107N 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.
COMP
Reference voltage
Fig. Curve Characteristics Even input signal frequency deviated, feedback applied DETOUT 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.
-13-
CXA3107N
Control Pins function controls shown below. Symbol Data filter cut-off charge Battery saving Function control current control mode control Input high Slow charge operation Input High Slow charge operation Sleep Note) control should performed with low. When each function controlled externally, state with asterisk Constant data filter cut-off (fc) expressed with following equation.
CHARGE charge speed control Quick charge Slow charge
External capacitance internal resistance
approximately when low. table below shows example constant data rate. Capacitance (pF) 6800 1500 1200 1200 (Hz) 1900 1200 2400 1200 2400 Data rate levels) 1200 levels) 2400 levels) 1600 levels) 3200 levels) 3200 levels) 6400 levels)
Misoperation Prevention Function Continuous Data offset comparator threshold value detector output canceled with feedback loop indicated paragraph 10). 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 10). 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
filter switch
(Pin
Fig. -14-
CXA3107N
Example Representative Characteristics
Supply voltage Current consumption 1000 5.93µA (VCC=1.4V) mode
Current consumption (µA)
Supply voltage Audio respnse RSSI output voltage characteristics
S+N+D RSSI
1000
0dBm=66.5mVrms
455kHz Dev. 4.8kHz AUDIO 1.6kHz VCC=1.4V 25°C
-100
(dBm) (dBµ)
Input level (dBµ) Level comparator characteristics
Comparator output voltage
Comparator input voltage (mV) 48mV 52mV
-15-
RSSI output voltage (mV)
Audio response
CXA3107N
comparator characteristics
Comparator output voltage
48mV Comparator input voltage (mV) Variable cut-off characteristics audio filter fCH=2.4kHz fCL=1.2kHz voltage 25°C
Response (dB)
Input frequency (Hz)
Detector output level temperature characteristics
Detector output level (mvrms)
Temperature (°C)
-16-
CXA3107N
Threshold level characteristics
Threshold level -214 (mV)
Temperature (°C)
-100
-17-
CXA3107N
Package Outline
Unit
20PIN SSOP (PLASTIC)
1.25
0.22 0.05
0.65 0.12 0.05 0.15 0.02
DETAIL NOTE: Dimension does include mold protrusion.
PACKAGE STRUCTURE
PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE SSOP-20P-L01 SSOP020-P-0044 LEAD TREATMENT LEAD MATERIAL PACKAGE WEIGHT EPOXY RESIN SOLDER PALLADIUM PLATING COPPER ALLOY 0.1g
-18-

Amplifier M-ary Pagers Description CXA3107N current consumption a

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