Sony CXA3117N Datasheet

– 1 –
CXA3117N
E96205B8Z
IF Amplifier for M-ary FSK Pagers
Description
The CXA3117N is a low current consumption FM IF amplifier which employs the newest bipolar process. It is suitable for M-ary FSK pagers.
Features
Low current consumption: 1.1mA
(typ. at VCC = 1.4V)
Low voltage operation: VCC = 1.1 to 4.0V
Small package 24-pin SSOP
Second mixer and oscillator
Needless of IF decoupling capacitor
Reference power supply for operational amplifier
and comparator
Bit rate filter with variable cut-off
Misoperation prevention function for continuous data
RSSI function
IF input, VCC standard
Applications
M-ary FSK pagers
Double conversion pagers
Block Diagram and Pin Configuration
Structure
Bipolar silicon monolithic IC
Absolute Maximum Ratings
Supply voltage VCC 7.0 V
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –65 to +150 °C
Allowable power dissipation PD 417 mW
Operating Condition
Supply voltage VCC 1.1 to 4.0 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.
24 pin SSOP (Plastic)
MIX IN
GND
REG OUT
REG CONT
LVA OUT
NRZ OUT
CHARGE
B.S.
AUDIO
L.C. OUT
CHG OFF
RSSI
OSC IN
OSC OUT
MIX OUT
V
CC
IF IN
TH CONT
FSK REF
QUAD
C1
C2
C3
FIL SW
OSC IF_LIM FILTER
MIX
QUAD_DET
LEVEL COMP
REG
RSSI
CHARGE
GND
LVA
13
14
15
16
17
18
19
20
21
22
23
24
2
3
4
5
6
7
8
9
10
11
12
1
For the availability of this product, please contact the sales office.
– 2 –
CXA3117N
Pin Description
Pin No.
1 1.4V
0.7V
1.3V
1.4V
0.2V
OSC IN
Connects the external parts of crystal oscillator circuit. A capacitor and crystal oscillator are connected to these pins and VCC.
Mixer output. Connect a 455kHz ceramic filter between this pin and IF IN.
IF limiter amplifier input.
Determines the level comparator threshold value. Threshold value can be adjusted by inserting the resistor between Pin 6 and VCC. Normally, short to VCC.
Connects the capacitor that determines the low cut-off frequency for the entire system.
Power supply.
OSC OUT
MIX OUT
VCC
IF IN
TH CONT
FSK REF
2
3
4
5
6
7
Symbol
Pin voltage
Equivalent circuit Description
2
1
GND
VCC
300
15k
15k
72
GND
VCC
3
1.5k
GND
VCC
20k
5
1.5k
1.5k 20k
GND
VCC
6
25k
GND
VCC
72
7
– 3 –
CXA3117N
Pin No.
8
1.4VQUAD
9 10 11
0.2V
C1 C2 C3
12 FIL SW
13 0.1VRSSI
14 CHG OFF
Connects the phase shifter of FM detector circuit.
Connects the capacitor that determines the LPF cut-off.
Switches the LPF cut-off. Cut-off is decreased by setting this pin high. (Applied voltage range: –0.5V to +7.0V)
RSSI circuit output.
Sets off the quick charge circuit current. The charge current is off by setting Pin 18 low and Pin 14 high.
Symbol
Pin voltage
Equivalent circuit Description
8
GND
VCC
22k20k
20p
GND
VCC
9 10 11
35k
50k
GND
140k
20k
72
12
GND
VCC
7k 7k
13
70k
GND
100k
20k
72
14
– 4 –
CXA3117N
Pin
No.
15 19 20
— — —
L.C. OUT NRZ OUT LVA OUT
Level comparator, NRZ comparator and LVA comparator outputs. They are open collectors. (Applied voltage range: –0.5V to +7.0V)
18 CHARGE
Controls the speed of the quick charge circuit. Set this pin high to execute the quick charge. (Applied voltage range: –0.5V to +7.0V)
21
REG CONT
Output for internal constant-voltage source amplifier. Connect the base of PNP transistor. (Current capacity: 100µA)
22 1.0VREG OUT
Constant-voltage source output. Controlled to maintain 1.0V.
23 GND Ground
17—B.S.
Controls the battery saving. Setting this pin low suspends the operation of IC. (Applied voltage range: –0.5V to +7.0V)
Symbol
Pin voltage
Equivalent circuit Description
GND
72
15
19
20
GND
140k
20k
72
17
16
0.2V
AUDIO
Level comparator and NRZ comparator inputs. The filter circuit output is connected.
GND
VCC
72
16
72
GND
100k
20k
18
GND
VCC
72
21
GND
VCC
78k
22
22k
1k
– 5 –
CXA3117N
Pin No.
24 1.4VMIX IN Mixer input.
Symbol
Pin voltage
Equivalent circuit Description
GND
VCC
4.16k
2k
4.16k
24
Electrical Characteristics
(VCC = 1.4V, Ta = 25°C, Fs = 21.7MHz, FMOD = 1.6kHz, FDEV = 4.8kHz, AMMOD = 30%)
Item Current consumption Current consumption AM rejection ratio NRZ output saturation voltage NRZ output leak current
NRZ hysteresis width VB output current
VB output saturation voltage REG OUT voltage
LVA operating voltage LVA output leak current
LVA output saturation voltage Detector output voltage Logic input voltage high level Logic input voltage low level
Limiting sensitivity Detector output level ratio
deviation to level comparator window width
Level comparator output saturation voltage
Level comparator output leak current
RSSI output offset Mixer input resistance Mixer output resistance IF limiter input resistance
ICC ICCS AMRR VSATNRZ ILNRZ
VTWNRZ IOUT
VSATVB VREG
VLVA ILLVA
VSATLVA VODET VTHBSV VTLBSV
VIN (LIM)
VLCWR
VSATLC
ILLC VORSSI
RINLIM ROUTMIX RINLIM
Measurement circuit 1, V2 = 1.0V Measurement circuit 1, V2 = 0V Measurement circuit 2, 30k LPF Measurement circuit 4, Vin = 0.3V Measurement circuit 3, Vin = 0.1V Measurement circuit 3,
Vin = 0.1 to 0.3V Measurement circuit 5 Measurement circuit 5 Output current 0µA Measurement circuit 6,
V1 = 1.4 to 1.0V Measurement circuit 6, V1 = 1.0V Measurement circuit 7 Measurement circuit 2
— —
Measurement circuit 2, Data filter fc = 2.4kHz
When Pin 6 is shorted to Vcc
Measurement circuit 9
Measurement circuit 8 Measurement circuit 10
— — —
0.7 — 25 — —
0
100
0.92
1.00 —
— 50
0.9 —
–15
— —
1.6
1.2
1.2
1.1 6
— — —
10 —
0.97
1.05 —
— 63 — —
–108
0
150
2.0
1.5
1.5
1.35 20 —
0.4
5.0 20 —
0.4
1.02
1.10
5.0
0.4 80 —
0.35 —
+15
0.4
5.0
300
2.4
1.8
1.8
mA
µA dB
V
µA
mV
µA
V V
V
µA
V
mVrms
V V
dBm
%
V
µA
mV
k k k
Symbol Conditions Min. Typ. Max. Unit
– 6 –
CXA3117N
V2
V1
1.4V
2
3
4
5
6
7
9
10
11
12
1
13
14
15
16
17
18
20
21
22
23
24
VCC
8
19
1000p
1.8µ
10p to 120p
Vin
V2 1V
1200p
1200p
8.2k
1200p
V1
1.4V
22p
2
3
4
5
6
7
8
9
10
11
12
1
13
14
15
16
17
18
19
20
21
22
23
24
15p
V
CC
Measurement circuit 1 Measurement circuit 2
V2 1V
V1
1.4V
2
3
4
5
6
7
9
10
11
12
1
13
14
15
16
17
18
20
21
22
23
24
VCC
Vin
8
19
100k
V2 1V
V1
1.4V
2
3
4
5
6
7
9
10
11
12
1
13
14
15
16
17
18
20
21
22
23
24
VCC
Vin
8
19
50µA
Measurement circuit 3 Measurement circuit 4
Electrical Characteristics Measurement Circuit
– 7 –
CXA3117N
V3
0.5V
V2 1V
V1
1.4V
2
3
4
5
6
7
9
10
11
12
1
13
14
15
16
17
18
22
23
24
VCC
19
100µA
20
8
GND
GND
21
V2 1V
V1
1.4 to 1.0V
2
3
4
5
6
7
9
10
11
12
1
13
14
15
16
17
18
21
22
23
24
VCC
19
100k
20
8
Measurement circuit 5 Measurement circuit 6
V2 1V
V1
1.4V
2
3
4
5
6
7
9
10
11
12
1
13
14
15
16
17
18
21
22
23
24
VCC
19
50µA
20
8
Vin
0.2V
V2 1V
V1
1.4V
2
3
4
5
6
7
9
10
11
12
1
13
14
16
17
18
21
22
23
24
VCC
19
20
8
15
100k
Measurement circuit 7 Measurement circuit 8
Vin
0.1V
V2 1V
V1
1.4V
2
3
4
5
6
7
9
10
11
12
1
13
14
16
17
18
21
22
23
24
VCC
19
20
8
15
50µA V2 1V
V1
1.4V
2
3
4
5
6
7
9
10
11
12
1
14
15
16
17
18
20
21
22
23
24
V
CC
8
19
13
100P
Measurement circuit 9 Measurement circuit 10
– 8 –
CXA3117N
OSC IF_LIM FILTER
MIX
QUAD_DET
LEVEL
COMP
REG
RSSI
CHARGE
GND
LVA
VB_
REG
NRZ_
COMP
CHARGE BS AUDIO L.C.
OUT
CHG_
OFF
FIL_SW
VCC
GND
2
3
4
5
6
7
8
9
10
11
12
1
13
14
15
16
17
18
19
20
21
22
23
24
AUDIO
RSSI
LEVEL
NRZ
LVA
REG
GND
GND
10p to 120p
1.8µH
1000p
GND
10µ
GND
PNP
220
0.01µ
GND
100k
100k
GND GND GND
S4 S3
100k
S2
GND
100p
GND
S1
6.8k
GND
680p
1100p
(1000p + 100p)
GND
DISC
GND
CERAFIL
0.01µ
10µ
GND
15p
22p
XTAL
RF
SMA
1420p
(1200p + 220p)
Application circuit
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.
– 9 –
CXA3117N
Application Note
1) Power Supply
The CXA3117N, with the built-in regulator, is designed to permit stable operation at the wide range of supply voltage from 1.1 to 4.0V. Decouple the wiring to VCC (Pin 4) as close to the pin as possible.
2) Oscillator Input
Oscillator input method
a) Using Pins 1 and 2, input self-excited oscillation signal through the composition of a Colpitts type crystal
oscillator circuit. Connect the capacitors attached to the crystal and Pin 2 to VCC.
b) Directly input a local oscillation signal to Pin 1.
2
3
1
V
CC
Ceramic filter
2
3
1
From local signal
Ceramic filter
Fig. 1
3) Mixer
The mixer is of double-balance type. Pin 24 is the input pin. Input though a suitable matching circuit. The input impedance is 2.0k. Pin 3 serves as the output pin for the mixer, and a load resistance of 1.5kis incorporated.
4) IF Filter
The filter to be connected between this mixer output and the IF limiter amplifier input should have the following specifications. Connect the ground pin of the IF filter to VCC.
I/O impedance : 1.5k±10% Bandwidth : Changes according to applications.
5) IF Limiter Amplifier
The gain of this IF limiter amplifier is approximately 100dB. Take notice of the following points in making connection to the IF limiter amplifier input pin (Pin 5).
a) Wiring to the IF limiter amplifier input (Pin 5) should be as short as possible. b) As the IF limiter amplifier output appears at QUAD (Pin 8), wiring to the ceramic discriminator connected
to QUAD should be as short as possible to reduce the interference with the mixer output and IF limiter amplifier input.
VCC
Wire as short and apart as possible As short as possible
3
4
5
6
7
8
9
Fig. 2
Loading...
+ 21 hidden pages