NJM2593 Datasheet PDF - JRC
| Part Number | NJM2593 | |
| Description | FM IF Demodulator IC / SSOP20 | |
| Manufacturers | JRC | |
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There is a preview and NJM2593 download ( pdf file ) link at the bottom of this page. Total 16 Pages | ||
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NJM2593
50MHz INPUT MIXER AND 450kHz FM IF DEMODULATOR IC
GENERAL DESCRIPTION
The NJM2593 is a wide-operating voltage, low-current
FM IF demodulator IC with 450kHz(standard) IF frequency.
PACKAGE OUTLINE
It includes an oscillator, mixer, limiting amplifier, quadrature
detector, active filter, and FSK comparator.
The NJM2593 also has a RSSI circuit and RSSI comparator
for carrier sense.
NJM2593V
FEATURES
Wide Operating Voltage
Low Operating Current
1.8V to 9.0V
1.2mA type. at V+ =2.0V, external local oscillator input
Maximum Mixer Input Signal
Frequency
50MHz (reference value)
Mixer Input Resistance
4.5kΩ (reference value)
IF Frequency
450kHz (standard)
Conventional Quadrature Detector
External Phase-shifting Capacitor
External Discriminator or LC Resonant Circuit
RSSI Comparator with Open-Collector Output
Quick Charge/Discharge Circuit for FSK Reference Voltage
Bipolar Technology
Package Outline
SSOP20
BLOCK DIAGRAM
MIX SENSE RSSI CARRIER FSK CHARGE LPF LPF AF
IN GND LEVEL OUT SENSE OUT SW OUT IN OUT
20 19 18 17 16 15 14 13 12 11
MIXER
BUFFER
OSC
1
OSC
(B)
2
OSC
(E)
3
MIX
OUT
+-
-+
RSSI COMP FSK COMP
+
-
FILTER AMP
RSSI
+
-
IF AMP
CHARGE
QUAD
DET
4 5 6 7 8 9 10
V+ IF DEC FSK FSK IF QUAD
IN VREF1 VREF2 OUT IN
Ver.2004-08-25
-1-
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NJM2593
External components
C D : Ceramic discriminator, CDBCB450KCAY70-R0 (Murata Manufacturing Co., Ltd, Japan)
IF FILTER : Ceramic filter, CFWCA450KGFA-R0 (Murata Manufacturing Co., Ltd., Japan)
Measurement condition
“Condition1” is the condition for the case of IF input :
IF SW
: in the A position.
IF IN input signal : input frequency(fif) = 450kHz, input level(VinIF)= 60dBuVEMF,
modulation frequency(fmod)=600Hz, deviation fdev=±2kHz
“Condition 2” is the condition for the case of Mixer Input :
IF SW
: in the B position
MIX IN input signal: input frequency(fmix)=21.7MHz, input level(VinMIX)=60dBuVEMF,
modulation frequency(fmod)=600Hz, deviation fdev=±2kHz
OSC(E)input signal: input frequency(fosc)=21.25MHz, input level(VinOSC)=105dBuVEMF
CERAMIC DISCRIMINATOR (especially designed for NJM2592)
To optimize some important performance, the following ceramic discriminator CD is available. For more information
on this CD and 450kHz CD, please contact the CD supplier.
CDBKB450KCAY75-R0 (Murata Manufacturing Co., Ltd., Japan)
Ver.2004-08-25
-5-
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for NJM2593 electronic component. |
| Information | Total 16 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ NJM2593.PDF Datasheet ] | |
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