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PDF TK14551VTL Data sheet ( Hoja de datos )
| Número de pieza | TK14551VTL | |
| Descripción | FM IF DETECTOR/AMPLIFIER | |
| Fabricantes | TOKO | |
| Logotipo |  |
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TK14551V
FM IF DETECTOR/AMPLIFIER
FEATURES
s IF Input Frequency ~90 MHz (TYP)
s Balanced Input (IF)
s Includes Dual High Speed RSSI Outputs. One is for
ASK demodulation, another one is for carrier
sensing.
s RSSI outputs are accurate with stable temperature
characteristic and include buffer amplifiers.
s High Speed RSSI Comparator for Carrier Sensing
s HIgh Speed Data Comparator (~2 Mbps)
s Wide Band Demodulator (~1 MHz)
s Battery Save Function
s Low Voltage Operation: 3.0 ~ 5.5 V
s Very Small Package (TSSOP-24)
DESCRIPTION
The TK14551V is a wide band IF IC capable of operating
up to 90 MHz. It includes an FM demodulator, RSSI, RSSI
comparator and data comparator. These functions can
perform high-speed operations. The TK14551V has a
unique function that allows establishing the demodulation
characteristics by changing the external RC time constant,
and not changing the phase shifter constant. The RSSI
output is individually trimmed, resulting in excellent
accuracy, good linearity, and stable temperature
characteristics. Because the TK14551V includes a dual
high-speed RSSI output, it is possible to demodulate AM
simply and to sense the carrier level at the same time.
APPLICATIONS
s Wide Band FSK Demodulation
s Wide Band FM Demodulation
s Video Signal Demodulation
s Wide Band ASK Demodulation
TK14551
IF DECOUPLE
IF DECOUPLE
IF OUTPUT
FM DEMODULATOR INPUT
IF VCC
GND
VCC
FM DEMODULATOR AMP INPUT
FM DEMODULATOR AMP OUTPUT
RSSI BUFFERED OUTPUT-2
DATA COMP INPUT (-)
DATA COMP INPUT (+)
BLOCK DIAGRAM
IF INPUT (-)
23 IF INPUT (+)
22 IF GND
21 BATTERY SAVE
20 RSSI COMP BIAS
19 RSSI OUTPUT-1
18 RSSI OUTPUT-2
17 RSSI BUFFERED OUTPUT-1
16 RSSI COMP OUTPUT
15 RSSI COMP GND
14 DATA COMP GND
13 DATA COMP OUTPUT
Therefore, the TK14551V is suitable for high-speed data
communication and can be used for various applications.
The TK14551V is available in the very small TSSOP-24
surface mount package.
IF
AMP
BIAS
RSSI
RSSI
Comparator
ORDERING INFORMATION
TK14551V
Tape/Reel Code
Demodulator
VCC
VCC
BUFF2
TAPE/REEL CODE
TL: Tape Left
January 2000 TOKO, Inc.
Page 1
1 page  
TK14551V
TEST CIRCUIT
PG1
100 kHz
100 mVP-P
DC = 1.0 V TR, TF < 10 ns
PG1
50
V3 = 0.9 V
V4 = 1 V
SW3
V5 = 1 V
SW4
SG1
50
~
V1 = 0.2 V
SW1
V2 = 2.0 V
2200 pF
2200 pF
51
SW2
5.6 K
CL1
10 pF
100 pF 5.6 K
VC
SG1
FM: 10.7 MHz
1 KHz ± 100 K dev
AM: 40.0 MHz
2 MHz 80% mod
1k
1k
CL2
10 pF
0.01 µF
10 µF
SW5
VD
SW6
A2 A3 VE
Comp VCC
=3V
V6 = 3V
V7 = 3V
NOTE:
CL1 and CL2 simulate probe capacitance
and stray capacitance.
VD and VE are measured with low capacitance
FET probe (Sony Tektronix P6201).
2200 pF
1pF
2200 pF
FM IF Coil
T1: 836BH-0268
(TOKO)
0.01 µF
2.2 K
T1 0.01 µF 0.01 µF
22 K SW7 SW8 SW9 SW10 1000 pF
SG2
2 MHz 200mVP-P
Sine Wave
DC = 1.0 V
10 µF
VCC
47 µF
1000 pF
0.01 µF
VA
10 k
A1
V11 = 0.5 V
VCC = 3 V
VB A4
V8
3K
3K
50
~
SG2
V9 V10 = 0.9 V
=1V
Example of 40 MHz (= fIN) FM detection
January 2000 TOKO, Inc.
1 pF
56 k
2.2 k
22 pF
1000 pF
VCC
A638AN-1346ETJ
(TOKO)
Page 5
5 Page 
TK14551V
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25 °C, unless otherwise specified.
FM DEMODULATION
S+N, N, THD, AM OUT (fin = 10.7 MHz)
0 VCC = 3 V
20
fin = 10.7 MHz
fm = 1 kHz
-20 dev. = ±100 kHz
S+N
16
-40 12
AM OUT
-60
(30% mod.)
8
-80 N
4
THD
-100
-120 -100 -80 -60 -40 -20 0
IF INPUT LEVEL (dBm)
0
20
RSSI BUFFER OUTPUT VOLTAGE
vs. IF INPUT LEVEL
(VCC CHARACTERISTICS)
2.0
fin = 40 MHz
1.6
1.2
VCC
0.8 5.5 V
5.0 V
4.0 V
3.0 V
0.4
0.0
-120 -100 -80 -60 -40 -20 0
IF INPUT LEVEL (dBm)
20
LOGARITHMIC DETECTION
AM DEMODULATION VOLTAGE VS.
IF INPUT LEVEL
1000
500
300
VCC = 3 V
fin = 40 MHz
fm = 2 MHz
mod = 80%
100
50
30
10
-120 -100 -80 -60 -40 -20 0
IF INPUT LEVEL (dBm)
20
FM DEMODULATION
S+N, N, THD, AM OUT (fin = 40 MHz)
0 VCC = 3 V
20
fin = 40 MHz
fm = 1 kHz
-20 dev. = ±100 kHz
S+N
16
-40 12
AM OUT
(30% mod.)
-60 8
-80 N
4
THD
-100
-120 -100 -80 -60 -40 -20 0
IF INPUT LEVEL (dBm)
0
20
RSSI BUFFER OUTPUT VOLTAGE
vs. IF INPUT LEVEL
(FREQUENCY CHARACTERISTICS)
2.0
VCC = 3 V
1.6
1.2
fin
0.8 40 MHz
70 MHz
90 MHz
0.4
0.0
-120 -100 -80 -60 -40 -20 0
IF INPUT LEVEL (dBm)
20
LOGARITHMIC DETECTION
AM DEMODULATION VOLTAGE VS.
DEMODULATING FREQUENCY
1000
500
300
100
50
VCC = 3 V
fin = 40 MHz
30 mod = 80%
10
10k 30k 100k 300k 1M 3M 10M
MODULATING FREQUENCY fm (Hz)
January 2000 TOKO, Inc.
Page 11
11 Page | ||
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| PDF Descargar | [ Datasheet TK14551VTL.PDF ] | |
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