NJM2550 JRC, NJM2550 Datasheet
NJM2550
Related parts for NJM2550
NJM2550 Summary of contents
Page 1
... IC with 10.7MHz(standard) IF frequency. It includes a limiting amplifier, quadrature detector, filter amplifier, FSK/ASK(OOK) comparator, RSSI thermal characteristics correction, and quick charge circuit The NJM2550 is suitable for low power, narrow band receiver for short range data/voice transmission by using IF=10.7MHz or IF/carrier frequency 50MHz. FEATURES ...
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... Measured at –3dB 1MHz VinIF=80dBuV AM=30 VinIF=80dBuV V =GND COMP REF 0.3V COMP 1kΩ load 1kΩ load NJM2550 (Ta=25°C) UNIT V mW °C °C (Ta=25°C) MIN. TYP. MAX. UNIT 2.0 3.0 9.0 V MIN. TYP. MAX. UNIT - 4 ...
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... VinIF=80dBuV =50MHz VinIF=80dBuV 33kΩ load SYMBOL TEST CONDITIONS + V = Signal = off on IF Signal= off = Signal = off on IF Signal= off on NJM2550 MIN. TYP. MAX. UNIT - 100 - MIN. TYP. ...
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... The external resistors connected to1pin and 16pin should have the same thermal coefficient. Ver.2006-02-24 COMP OUT + V 100k 100k 100k 10u + COMP - - + CHARGE - IF AMP 0.01u 0.01u 10u 0. NJM2550 AMP OUT 3300p 68k 68k 330p 1000p BUFF AMP QUAD DET R50 R10 OUT Tquad 68k - 4 - ...
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... GND 5 V+ GND V+ 6 140uA GND NJM2550 VOLTAGE FUNCTION RSSI Reference Current Control To control RSSI reference current, a resistor is connected to pin1 and pin6, respectively. The recommended value is 33kΩ. 1.12V By choosing the different thermal coefficient of these two resisters, RSSI thermal characteristics can be changed ...
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... GND V+ 20uA 10 9 210uA GND V+ 11 35k GND NJM2550 VOLTAGE FUNCTION Quadrature Detector Input An external phase-shifting coil or discriminator is connected between pin6 and pin7. Note that supply voltage should -- be the same as the voltage supplied to pin5. Demodulated Signal Output An external 3rd order multiple feedback filter(RC filter) is connected between pin8 and pin9 ...
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... GND V+ 13 GND 14 GND V+ 10uA 300k 15 GND NJM2550 VOLTAGE FUNCTION Comparator Input This pin is an input of the wave shaping comparator. -- Comparator Reference Input This pin is an input of reference voltage for the wave shaping comparator. A capacitor is connected to create an average DC Level of FM demodulated -- signal ...
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... ESD protection diodes exist between each of the following pins and V Pin 1,3,4,6,8,9,10,11,16 2. ESD protection diodes also exist between each of the following pins and ground. Pin 1,3,4,6,7,8,9,10,11,12,13,14,15,16 Ver.2006-02-24 EQUIVARENT CIRCUIT V+ 16 GND NJM2550 VOLTAGE FUNCTION RSSI Output Pin16 outputs DC level proportional to the log of IF input signal level to pin3 ...
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... 0.01u 0.01u 10u 0. AMP OUT C15 3300p R13 R14 C16 330p 68k 68k BUFF AMP IC1 NJM2550 QUAD DET R50 R10 + 4165-T070 Rquad=1kΩ NJM2550 R11 68k C12 1000p AF OUT - 9 - ...
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... This board is designed to supply voltage to CHARGE SWITCH, the pull-up of COMP OUT, and the quadrature circuit from the common power source. NJM2550 permits each of CHARGE SWITCH and pull-up of COMP OUT to have another power source within the limit of the rated power supply voltage. ...
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... COMP OUT 19 100kΩ OFF NJM2550 0.01uF 30pF 33kΩ V+ GND 6 10uF 100kΩ 18 100kΩ 17 330pF 16 68kΩ 1000pF 3300pF 13 11 68kΩ 68kΩ 2pF 8 4165-T070 (Sumida Corportion 1kΩ 7 0.1uF NJM2550 AMP OUT AF OUT - 11 - ...
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... IF Input Level VinIF(dBuV) Ver.2006-02- fif=10.7MHz fif=50MHz S+N AMR 100 120 NJM2550 Demodulated Signal Level versus Supply Voltage fdev=±100kHz, fmod=1kHz, VinIF=80dBuV 180 160 140 fif=10.7MHz 120 100 fif=50MHz Supply Voltage V+(V) -3dB Limiting Sensitivisy versus Supply Voltage fdev=± ...
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... VinIF=80dBuV 140 fif=10.7MHz 120 100 fif=50MHz 100 FM Modulation Frequency(kHz) Ver.2006-02-24 fif=10.7MHz fif=50MHz 80 100 120 11 11.5 1000 10000 NJM2550 RSSI Output versus IF Frequency 1.6 1.4 VinIF=80dBuV 1.2 1 0.8 0.6 VinIF=40dBuV 0.4 0 Frequency fif (MHz) AF OUT versus IF Frequency(S Curve)-50MHz- VinIF=80dBuV 2.5 2 V+=9V V+=3V 1.5 V+= ...
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... Ambient Temperature Ta(°C) Ver.2006-02- 100 120 fif=10.7MHz fif=50MHz 60 80 100 120 VinIF=100dBuV VinIF=80dBuV VinIF=60dBuV VinIF=40dBuV 60 80 100 120 NJM2550 Demodulated Signal Level versus Temperature fdev=±100kHz, fmod=1kHz, VinIF=80dBuV 180 160 140 fif=10.7MHz 120 100 fif=50MHz 80 60 -40 - Ambient Temperature Ta(° ...
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... Ambient Temperature Ta(°C) Ver.2006-02- 100 120 NJM2550 [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights ...