NJM2590 PDF даташит
Спецификация NJM2590 изготовлена «JRC» и имеет функцию, называемую «(NJM2590 / NJM2597) FM IF Demodulator IC / SSOP14». |
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Детали детали
Номер произв | NJM2590 |
Описание | (NJM2590 / NJM2597) FM IF Demodulator IC / SSOP14 |
Производители | JRC |
логотип |
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NJM2590/97
455kHz INPUT FM IF DEMODULATOR
GENERAL DESCRIPTION
The NJM2590 and NJM2597 are low current FM IF demodulator
ICs with 455kHz IF input, which operate from 1.6V supply.
The NJM2590/97 contain the minimum functions required to
FM IF demodulator, that is, IF amplifier, quadrature detector,
LPF amplifier, FSK comparator, RSSI, and RSSI comparator.
It offers unmatched design flexibility.
PACKAGE OUTLINE
NJM2590V/97V
FEATURES
Low Operating Voltage 1.6V to 5.5V
Low Operating Current 550uA at V+ =1.8V
IF Input Frequency
455kHz (standard)
RSSI Comparator
The Range of Linear Area on RSSI Output versus IF Input Characteristics
NJN2590
IF Input level=25 to 60 dBuVEMF (reference value)
NJM2597
IF Input level=35 to 85 dBuVEMF (reference value)
Bipolar Technology
Package Outline
SSOP14
BLOCK DIAGRAM
V+ CARRIER SENSE RSSI
SENSE LEVEL OUT
14 13 12 11
FSK CHARGE LPF
OUT
OUT
10 9
8
RSSI
COMP
RSSI
IF AMP
FSK
COMP
CHARGE
QUAD DET
LPF
1
IF IN
23
GND DEC
45 6
FSK QUAD AF
REF IN OUT
7
LPF
IN
Ver.2004-08-25
-1-
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NJM2590/97
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ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Supply Voltage
V+
Power Dissipation
Operating Temperature
PD
Topr
Storage Temperature
Tstg
RATINGS
8.0
300
- 40 to +85
- 40 to +125
(Ta=25°C)
UNIT
V
mW
°C
°C
RECOMMENDED OPERATIONAL CONDITION
(Ta=25°C)
PARAMETER
SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT
Supply Voltage
V+
1.6 1.8 5.5
V
ELECTRICAL CHARACTERISTICS (Ta=25°C, V+=1.8V, fin=455kHz, fmod=600Hz, fdev=±4kHz)
PARAMETER
SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT
Current Consumption
I c c q No Signal
440 550 660
uA
IF Amplifier Input Resistance
Rin
(1.6) 2 (2.4) kΩ
Signal to Noise Ratio 1
S/N1 Vi=60dBu EMF
- 60 - dB
Signal to Noise Ratio 2
S/N2 Vi=25dBu EMF
- 30 - dB
- 3dB Limiting Sensitivity
Vin(lim)
- 22 27 dBu EMF
Demodulated Output Level
Vod Vi=60dBu EMF
35 40 65 mVrms
AM Rejection Raito
AMR
Vi=60dBu EMF
AM=30%
- 50 - dB
Duty Ratio of Wave Shaped Output
DR Vi=60dBu EMF
40 50 60
%
Quick Charge/Discharge Current
RSSI Output Voltage
NJM2590
NJM2597
Ich
Vrssi
V FSK OUT=GND
V LPF OUT = 0.18V
Vi=40dBu EMF
Vi=80dBu EMF
35 65 110 uA
0.7 0.9 1.1
0.8 1.1 1.4
V
High Level Leak Current of
FSK OUT Terminal
IfskH
V FSK OUT=V+
(-0.1) (0) (0.1)
Low Level Voltage of
FSK OUT Terminal
VfskL I FSK OUT =100uA
- 0.1 0.4
High Level Leak Current of
CARRIER SENSE Terminal
IcryH
V CARRIAR SENSE =V+
(-0.1) (0) (0.1)
Low Level Voltage of
CARRIER SENSE Terminal
VcryL I CARRIER SENSE=100uA
0.0
0.1
0.4
Bias Current of
SENSE LEVEL Terminal
Ilevel
V CARRIER SENSE =0.8V
(-1.0)
(0)
(1.0)
The value shown in parenthesis are reference values.
uA
V
uA
V
uA
-2-
Ver.2004-08-25
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NJM2590/97
TEST CIRCUIT
This test circuit allows the measurement of all parameters described in “ELECTRICAL CHARACTERISTICS”. This
test circuit includes some electrical switches that should be in the suitable positions for the measurement of each
parameter. For the best measurement of each parameter, the drawings of ”Test Circuit 1 to 10” are additionally
prepared to show the switching positions and other changes of connection. Note that “Test Circuit 1 to 10” are not
the complete circuit to measure.
CARRIER
SENSE
V+
RSSI FSK
OUT OUT
10u A
100k
100k
SENSE
LEVEL
1000p
0.01u
14 13 12 11 10 9 8
RSSI
COMP
FSK
COMP
RSSI
IF AMP
CHARGE
QUAD DET LPF
12 3 4567
0.1u
51
0.1u
A
CD 68k 68k
10u 3.0k 68k
10u 3300p
560p
0.18V
V+
Note :
1. “CD” means a ceramic discriminator of 455kHz ; CDBCB455KCAY66-R0(MURATA,JAPAN)
Ver.2004-08-25
-3-
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Номер в каталоге | Описание | Производители |
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