TK14551V TOKO, TK14551V Datasheet

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TK14551V

Manufacturer Part Number
TK14551V
Description
FM IF DETECTOR/AMPLIFIER
Manufacturer
TOKO
Datasheet

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FEATURES
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.
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.
January 2000 TOKO, Inc.
ASK demodulation, another one is for carrier
sensing.
Includes Dual High Speed RSSI Outputs. One is for
IF Input Frequency ~90 MHz (TYP)
Balanced Input (IF)
RSSI outputs are accurate with stable temperature
High Speed RSSI Comparator for Carrier Sensing
HIgh Speed Data Comparator (~2 Mbps)
Wide Band Demodulator (~1 MHz)
Battery Save Function
Low Voltage Operation: 3.0 ~ 5.5 V
Very Small Package (TSSOP-24)
characteristic and include buffer amplifiers.
ORDERING INFORMATION
TK14551V
Tape/Reel Code
TAPE/REEL CODE
TL: Tape Left
APPLICATIONS
Wide Band FSK Demodulation
Wide Band FM Demodulation
Video Signal Demodulation
Wide Band ASK Demodulation
FM IF DETECTOR/AMPLIFIER
AMP
IF
FM DEMODULATOR AMP OUTPUT
FM DEMODULATOR AMP INPUT
RSSI BUFFERED OUTPUT-2
RSSI
BLOCK DIAGRAM
FM DEMODULATOR INPUT
Demodulator
BIAS
DATA COMP INPUT (+)
DATA COMP INPUT (-)
V CC
TK14551
IF DECOUPLE
IF DECOUPLE
IF OUTPUT
IF V CC
GND
V CC
V CC
Comparator
BUFF2
RSSI
TK14551V
19
18
17
16
15
14
23
22
21
20
13
IF INPUT (+)
IF GND
RSSI COMP BIAS
RSSI OUTPUT-1
RSSI BUFFERED OUTPUT-1
RSSI COMP OUTPUT
RSSI COMP GND
DATA COMP GND
DATA COMP OUTPUT
IF INPUT (-)
BATTERY SAVE
RSSI OUTPUT-2
Page 1

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TK14551V Summary of contents

Page 1

... Battery Save Function Low Voltage Operation: 3.0 ~ 5.5 V Very Small Package (TSSOP-24) DESCRIPTION The TK14551V is a wide band IF IC capable of operating 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 ...

Page 2

... TK14551V ABSOLUTE MAXIMUM RATINGS Supply Voltage ........................................................... 6 V Operating Voltage Range .............................. 3.0 to 5.5 V Power Dissipation (Note 1) ................................ 230 mW TK14551V ELECTRICAL CHARACTERISTICS Test conditions unless otherwise specified ...

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... TK14551V ELECTRICAL CHARACTERISTICS Test conditions unless otherwise specified ...

Page 4

... TK14551V TK14551V ELECTRICAL CHARACTERISTICS Test conditions unless otherwise specified ...

Page 5

... CL1 and CL2 simulate probe capacitance and stray capacitance. VD and VE are measured with low capacitance FET probe (Sony Tektronix P6201). SG2 1000 pF SW10 2 MHz 200mVP-P SW9 SW8 Sine Wave SG2 V10 = 0 detection 56 k 1000 pF TK14551V Comp Page 5 ...

Page 6

... TK14551V Measurement of Battery Save Function: Battery Save ON: SW1 = 0.2 V position Battery Save OFF: SW1 = 2 V position Measurement of Comparator: SW3 is closed only for the measurement of the RSSI comparator response characteristics and output sink current, supplying PG1 is connected only for the measurement of the RSSI comparator response. Input the pulse wave to Pin 20, and measure the output wave (VD) of Pin 16 ...

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... TK14551V ...

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... TK14551V PIN FUNCTION DESCRIPTION (CONT ...

Page 9

... TK14551V ...

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... TK14551V PIN FUNCTION DESCRIPTION (CONT Page ...

Page 11

... S OUT 8 (30% mod 5.5 V 5.0 V 4.0 V 3 TK14551V FM DEMODULATION S+N, N, THD, AM OUT ( MHz MHz S kHz -20 dev. = 100 kHz -40 AM OUT (30% mod.) -60 -80 N THD -100 -120 -100 -80 -60 -40 - INPUT LEVEL (dBm) RSSI BUFFER OUTPUT VOLTAGE vs ...

Page 12

... TK14551V TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) IF LIMITING AMPLIFIER GAIN vs. INPUT FREQUENCY 100 INPUT FREQUENCY (MHz) SUPPLY CURRENT vs. TEMPERATURE -40 - TEMPERATURE ( C) RSSI BUFFER OUTPUT VOLTAGE vs. IF INPUT LEVEL (TEMPERATURE CHARACTERISTICS) 2 MHz 1 ...

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... 10.7 MHz kHz dev. = 100 kHz -50 -60 -70 - TK14551V FM DEMODULATION DEMODULATION OUTPUT VOLTAGE, TOTAL HARMONIC DISTORTION vs. TEMPERATURE 200 10.7 MHz kHz 160 dev. = 100 kHz V OUT 120 80 40 THD 0 -40 -20 ...

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... TK14551V TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) DATA COMPARATOR TRANSIENT RESPONSE (FALL) IN (0.1V/div) 20 ns/div FM DEMODULATION FREQUENCY CHARACTERISTICS 836BH-0268 (TOKO) DEMODULATION OUTPUT VOLTAGE vs. DEMODULTING FREQUENCY 104.4 mVrms 330 1000 10.7 MHz dev. = 100 kHz -10 -12 ...

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... RSSI Buffer Out 2 (0.1V/div) Data Comparator Out (1V/div) 0.2 s/div January 2000 TOKO, Inc unless otherwise specified COMP V CC TK14551V = -40 dBm IN With Active Filter ( MHz) Test Circuit 1000 COMP ...

Page 16

... TK14551V TYPICAL PERFORMANCE CHARACTERISTICS (CONT.) RSSI Buffer Output (Pin 17) Transient Response (IF Input ON/OFF) • 100 pF 0 dBm input -30 dBm input -60 dBm input 2 µs/div • 1000 pF 0 dBm input -30 dBm input -60 dBm input 5 µs/div • 0. dBm input -30 dBm input -60 dBm input 50 µ ...

Page 17

... January 2000 TOKO, Inc unless otherwise specified. A RSSI BUFFERED OUTPUT-1 C 5.6 k Condition MHz RSSI BUFFERED OUTPUT-1 (0.5V/div) Battery Save (1V/div) RSSI BUFFERED OUTPUT-1 (0.5V/div) Battery Save (1V/div) RSSI BUFFERED OUTPUT-1 (0.5V/div) Battery Save (1V/div) TK14551V OFF) Page 17 ...

Page 18

... TK14551V If the input FSK modulation, whether the IF input is a balanced or an unbalanced input, there is no problem. But, if the input is ASK modulation and the IF input is a balanced input, the Bit Error Rate (BER) may be high. Therefore, if the input is ASK modulation, the IF input must be an unbalanced input. If the input is an unbalanced input as shown below, do not terminate Pin 1 (do not connect the bypass capacitor between Pin 1 and GND) ...

Page 19

... Pin 24 and Pin 2 or between Pin 23 and Pin 1 in parallel to provide the equivalent load impedance of the filter. Figure 2 shows an example of a filter with a 330 January 2000 TOKO, Inc OUTPUT FIGURE 1 (mA 1.0)/ 23, 24 330 1, 2 FIGURE 2 TK14551V impedance. 1.5 K Page 19 ...

Page 20

... TK14551V CIRCUIT DESCRIPTION The input impedance of the IF limiter amplifier (between Pin 23, 24 and GND follows j50 + j25 + j10 j10 - j25 - j50 Page ...

Page 21

... AM demodulation method). Therefore very useful application for some uses because it doesn’t have the response time problem. January 2000 TOKO, Inc 1 OUTPUT CURRENT 18, 19 RSSI- OUT Current-to-Voltage Transformation Resistor FIGURE 3 - RSSI OUTPUT STAGE TK14551V - 0.2 V (the supply voltage minus the collector Page 21 ...

Page 22

... TK14551V CIRCUIT DESCRIPTION Figure 4 shows the AM demodulated waveform necessary to improve the distortion of the AM demodulated waveform of logarithmic detection, connect a low pass filter to the RSSI buffer amplifier output. Figure 5 shows the AM demodulated waveform with a low pass filter inserted. Page 22 Operating Condition fin = 40 MHz, ...

Page 23

... Therefore, to have stable operation, Pin 4 should be higher than 100 mV The following figures show examples of the phase shifter resonance circuit January 2000 TOKO, Inc ceramic discriminator FIGURE 7 - EXAMPLES OF PHASE SHIFTERS TK14551V multiplier core circuit . P the characteristic impedance Delay ...

Page 24

... TK14551V CIRCUIT DESCRIPTION Establishing Demodulation Characteristics: Generally, demodulation characteristics of FM detectors are determined by the external phase shifter. However, this product has a unique function which can optionally establish the demodulation characteristics by the time constant of the circuit parts after demodulation. The following explains this concept. ...

Page 25

... Demodulated Bandwidth 1/gm is approximately 50 k which is the output resistance of the multiplier. Pin 9 is disconnected. Demodulated Output Voltage V OUT Demodulated Output Voltage Demodulated Bandwidth V OUT 1/gm is approximately which is the output resistance of the multiplier. Pin 9 is disconnected. TK14551V OUT C1(1/gm ...

Page 26

... TK14551V CIRCUIT DESCRIPTION RSSI Comparator, Data Comparator: The TK14551V contains a general purpose high speed data comparator and RSSI comparator for the base band processing. Because the input stage is composed of PNP transistors possible to operate from a minimum voltage of 0 the supply voltage - 1.0 V (see Figure 12). ...

Page 27

... Pin 11 of the data comparator input established at a few tens of mV. But, as the demodulation level of the RSSI buffer amplifier output-2 is changed by the dispersion best to control variable resistor, etc possible to substitute the variable resistor for Vs. January 2000 TOKO, Inc BIAS FIGURE 14 - BATTERY SAVE TK14551V Page 27 ...

Page 28

... TK14551V CIRCUIT DESCRIPTION SG1 50 ~ SG1 50 ~ Page B.S. = 1.5 V 5.6 K 2200 pF 5.6 K 2200 pF 100 pF 51 BIAS IF AMP RSSI 2200 pF 0.01 µF 0.01 µF 2200 pF 0.01 µF 10 µF 0.01 µ µF FIGURE B.S. = 1.5 V 5.6 K 2200 pF 5.6 K 2200 pF 100 pF 51 BIAS IF AMP RSSI 2200 pF 0.01 µ ...

Page 29

... TEST BOARD C1= 2200 1000 pF 100 2 5 836BH-0268 (TOKO) January 2000 TOKO, Inc. L1 TK14551V Page 29 ...

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... TK14551V Page 30 NOTES January 2000 TOKO, Inc. ...

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... January 2000 TOKO, Inc. NOTES TK14551V Page 31 ...

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... Toko America, Inc. 107 Mill Plain Road Danbury, CT 06811 Tel: (203) 748-6871 Fax: (203) 797-1223 IC-119-TK119xx 0798O0.0K Marking Information TK14551V 14551 Fax: (847) 699-7864 Semiconductor Technical Support Toko Design Center 4755 Forge Road Colorado Springs, CO 80907 Tel: (719) 528-2200 Fax: (719) 528-2375 January 2000 TOKO, Inc ...

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