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CXA3304N
IF IC for ETC
Description The CXA3304N is an IF signal processing IC for the ETC car-mounted system which employs the newest bipolar process. Features * Low current consumption 7.8 mA (typ. at VCC=3.0 V) * Small package 16-pin SSOP * 40 MHz IF amplifier * RSSI function * RSSI buffer * Peak hold circuit for carrier detection * Comparator for carrier detection * Comparator for data output waveform shaping * Sleep mode supported Application ETC car-mounted system Structure Bipolar silicon monolithic IC 16 pin SSOP (Plastic)
Absolute Maximum Ratings (Ta=25 C) * Supply voltage VCC 14.0 V * Operating temperature Topr -30 to +100 C * Storage temperature Tstg -65 to +150 C * Allowable power dissipation 300 mW PD Operating Condition Supply voltage
VCC
2.5 to 5.5
V
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
--1--
E98X40-TE
RSSI OUT
BUFFER OUT
BIAS
COMP IN
REF IN
DATA OUT
RSSI REF
PEAK HOLD
HOLD CAP
GND
Block Diagram and Pin Configuration
--2--
16
1
LIM
IF IN
15
2
RSSI
XIF IN
14
3 4
COMP1
POWER SAVE
13
PEAK HOLD
12
5 6 7 8
COMP2
RSSI PEAK
11 10
VREF
CARRIER SENSE
9
VCC
CXA3304N
CXA3304N
Pin Description Pin No. Symbol Pin voltage Equivalent circuit
VCC
Description RSSI output and RSSI buffer input. The current output is converted to the voltage and it undergoes the waveform shaping by the external resistor and capacitor. The input/output voltage range is between 0.2 V to 1.4 V. Buffer output which outputs the RSSI voltage.
1
RSSI OUT
--
124
1 2
124
2
BUFFER OUT
--
GND VCC
3
COMP IN
--
124
3 4
Comparator input.
124
4
REF IN
--
GND VCC
Comparator reference voltage input.
62
5 10
DATA OUT CARRIER SENSE
--
5
10
Comparator output. Open collector.
GND VCC
124
6
RSSI REF
0.2 V
6
124
Connects the resistor which determines the output current characteristics for the RSSI circuit.
GND
--3--
CXA3304N
Pin No.
Symbol
Pin voltage
Equivalent circuit
VCC
Description
124
7
HOLD CAP
--
7
Connects the external capacitor which determines the peak hold time constant. The bias current of the internal buffer circuit flows even in hold mode.
GND
8 9
GND VCC
-- --
VCC
Ground. VCC. Input of voltage which is the threshold value of the carrier sense comparator.
124 12
11
VREF
--
124 11
12
RSSI PEAK
--
GND VCC
RSSI peak voltage output. This is also connected to the input pin for the carrier sense comparator.
13
PEAK HOLD
--
13 14 20k (28k) 80k (120k) GND VCC
Peak hold circuit control. Peak hold for low; reset operation for high.
14
POWER SAVE
--
Power saving control. Sleep mode for low; IC operation for high.
15
15 16
XIF IN IF IN
0V
1.5k 16 1.5k
IF signal input. It is input with DC coupled. Input the IF signal via a matching circuit.
GND
--4--
CXA3304N
Electrical Characteristics Item Current consumption Current consumption Logic input voltage high level Logic input voltage low level IF limiter input resistance Comparator 1 output saturation voltage Comparator 1 output leak current Comparator 1 output current Comparator 2 output saturation voltage Comparator 2 output leak current Comparator 2 output current RSSI output voltage 1 RSSI output voltage 2 RSSI output voltage 3 RSSI buffer output current + RSSI buffer output current - Peak hold leak current Peak hold charge current Peak hold discharge current Pin 11 input current Pin 13 input current Pin 14 input current Symbol Condition ICC Vin=0 V, Pin 9 current ICCS V14=0 V, Pin 9 current Vth Vtl Rif Vst1 Icl1 Io1 Vst2 Icl2 Io2 Vr1 Vr2 Vr3 Irs + Irs - Ipl Ipc Ipd I11 I13 I14 DC voltage I5=640 A, V3=0.16 V, V4=0.2 V V5=3 V, V3=0.24 V, V4=0.2 V V5=0.4 V, V3=0.16 V, V4=0.2 V I10=300 A, V11=0.2 V, V7=0.24 V V10=3 V, V11=0.2 V, V7=0.16 V V10=0.4 V, V11=0.2 V, V7=0.24 V Vin=-67 dBm, 40 MHz Vin=-47 dBm, 40 MHz Vin=-17 dBm, 40 MHz V1=1.4 V, V2=0.2 V V1=0 V, V2=1.4 V V13=0 V, V1=0.2 V, V7=1.4 V Pin 7 current V13=0 V, V7=0.2 V, V1=1.4 V Pin 7 current V7=1.4 V Pin 7 current V11=0, V7=1.4 V -- V14= 1 V -- -- Min. 5.5 -- 1 0 1.2 -- -- 640 -- -- 300 0.2 0.61 1.1 100 100 -- 100 100 -- -- --
(VCC=3 V, Ta=25 C) Typ. 7.8 33 -- -- 1.5 0.15 0 -- 0.1 0 -- 0.35 0.81 1.35 -- 130 0.05 220 180 0.5 17 11 Max. 10 100 VCC 0.35 1.8 0.4 5 -- 0.4 5 -- 0.5 1.01 1.655 -- -- 5 -- -- 50 50 50 Unit mA A V V k V A A V A A V V V A A A A A A A A
Unless otherwise specified, V14=3 V, V13=3 V and V11=3 V. Pin condition Example) V13 : Pin 13 voltage, I5 : Pin 5 current The external constant is the value shown in the Application Circuit.
--5--
CXA3304N
Electrical Characteristics Measurement Circuit
VCC
10 0.01
9
VCC 10k CARRIER SENSE 10 COMP2
8
PEAK HOLD 470p
V11 11
7
1k
6
4.7k RSSI PEAK 12
VCC DATA OUT RSSI OUT
COMP1
5
100p
Vhold 13
4
22k BIAS 22k RSSI
Vsave 14
1000p 15
2
3
5p Vin 16 LIM
1000p
--6--
1
2.2k
CXA3304N
Application Circuit
ICC
VCC
ICC
VCC
GND
CARRIER SENSE
VCC
HOLD CAP
R8
10
GND 100k VCC GND OPEN S1 GND GND 10 470p C7 4.7k C10 1k 100p R4 C8
9
OPEN
10
7 6
CXA3304N
8 5
RSSI REF
BIAS
VREF
OPEN
11
RSSI PEAK
RESET
12
PEAK HOLD
PEAK HOLD
ACTIVE
SLEEP
POWER SAVE
14
3
15
XIF IN
2
BUFFER OUT
16
4.5 to 20pF
1
IF IN
Application circuits shown are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same.
IF_IN (50)
--7--
RSSI OUT
C15
GND
DATA OUT
13
4
R5 0.01
2.2k C2
22k C6
22k
R2
R3
5p
R1
R9 S4 0.01 0.01 0.01 C13 0.01 C12 10 10k C11 0.01 C14 R7 C5 C4 C9 C3 1000p C1 1000p 10 S5 S6
10 820nH S3 L1 S2
1
R6
CXA3304N
Description of Operation 1) Power supply This IC has a built-in regulator and is designed for stable operation over a wide range of supply voltages from 2.5 to 5.5 V. Wiring to the power supply pin should be decoupled as close to the pin as possible. In addition, the Pin 9 power supply line and the power supply line connected to the comparator output pull-up resistor should be separated as necessary. The IC can also be set to sleep mode to reduce power consumption by controlling Pin 14. Pin 14 voltage Function HI IC operation mode LOW Sleep mode
2) Limiter amplifier This is a differential input type limiter amplifier. The input impedance is approximately 700 . Input the IF signal via a matching circuit. 3) RSSI circuit This circuit outputs a current corresponding to the amplitude of the IF signal input to the limiter amplifier. If the IF signal is the ASK signal, demodulated output is obtained. Connect a resistor to Pin 1 to convert the voltage. Adjusting this resistance value also changes the RSSI output voltage, but the value should be set so that the output voltage is smaller than the supply voltage -1.1 V. The output current includes a component twice the IF signal frequency. Adjust the value of the Pin 1 external capacitor as necessary. Connect a resistor to Pin 6 for determining the temperature characteristics of the RSSI circuit output current. Pin 2 is the RSSI circuit buffer output. The output range is from approximately 0.2 V to the supply voltage 1.1 V. 4) COMP1 circuit This is the comparator circuit for shaping the ASK demodulation signal waveform. The output is an open collector. Connect this circuit to the power supply, etc., via a pull-up resistor. Set the connected power supply to the Pin 9 potential or lower.
--8--
CXA3304N
5) Peak hold circuit This circuit holds the Pin 1 RSSI output voltage peak. Peak hold operation and reset operation are switched with Pin 13. Peak hold operation The input RSSI voltage is held by the Pin 7 capacitor. The held voltage passes through the buffer circuit and is output to Pin 12. The response characteristics during peak hold operation are determined by the peak hold charge and leak currents, which are determined inside the IC, and the Pin 7 capacitance value. The held voltage fluctuates according to the peak hold leak current. This fluctuation becomes larger as the capacitor value is set smaller. Adjust the reset operation interval and the capacitor value as necessary. In addition, the hold time can also be shortened by connecting a resistor between Pin 7 and GND. Reset operation The charge held by the Pin 7 capacitor is discharged according to the peak hold discharge current which is determined inside the IC. The discharge time changes according to the capacitor value. Pin 13 voltage Function HI Reset LOW Peak hold
6) COMP2 circuit This is the carrier sense comparator circuit. The input pin is connected internally to the RSSI PEAK output (Pin 12). Apply the voltage to be used as the threshold value to Pin 11. The comparator output is an open collector output, and should be connected to the power supply, etc., via a pull-up resistor. Set the connected power supply to the Pin 9 potential or lower.
--9--
CXA3304N
Example Representative Characteristics
Active mode current consumption (P9) VCC (P9)=3V, POW_SAVE (P14)=1V
Active mode current consumption (P9) [mA]
8.1
8.0
7.9
7.8
7.7
7.6 2.5
3.0
3.5
4.0
4.5
5.0
5.5
Supply voltage [V]
Power saving mode current consumption (P9) VCC (P9)=3V, POW_SAVE (P14)=0.35V Power saving mode current consumption (P9) [A]
80
60
40
20
0 2.5
3.0
3.5
4.0
4.5
5.0
5.5
Supply voltage [V]
--10--
CXA3304N
RSSI output characteristics 1.6 VCC (P9)=3V, IF=40MHz CW
1.4
1.2 RSSI_OUT (P1) voltage [V]
1.0
0.8
0.6
0.4
0.2
0 -80
-70
-60
-50
-40
-30
-20
-10
0
10
IF input power [dBm]
RSSI output temperature characteristics 1.6 VCC (P9)=3V, IF=40MHz CW
1.4
1.2 RSSI_OUT (P1) voltage [V]
1.0
0.8
0.6
0.4
: -30C : 25C : 100C
0.2
0 -80
-70
-60
-50
-40
-30
-20
-10
0
IF input power [dBm]
--11--
CXA3304N
Package Outline
Unit : mm
16PIN SSOP (PLASTIC)
5.0 0.1 + 0.2 1.25 - 0.1 0.1 16 9 A
4.4 0.1
1
8 0.65 + 0.05 0.15 - 0.02
+ 0.1 0.22 - 0.05
0.13 M 0.1 0.1
0 to 10 DETAIL A NOTE: Dimension "" does not include mold protrusion.
PACKAGE STRUCTURE
PACKAGE MATERIAL SONY CODE EIAJ CODE JEDEC CODE SSOP-16P-L01 SSOP016-P-0044 LEAD TREATMENT LEAD MATERIAL PACKAGE MASS EPOXY RESIN SOLDER / PALLADIUM PLATING 42/COPPER ALLOY 0.1g
NOTE : PALLADIUM PLATING This product uses S-PdPPF (Sony Spec.-Palladium Pre-Plated Lead Frame).
--12--
0.5 0.2
6.4 0.2

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