NJM2549 Datasheet PDF - New Japan Radio

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NJM2549
New Japan Radio

Part Number NJM2549
Description WIDE BAND FM IF DEMODULATOR
Page 18 Pages


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WIDE BAND FM IF DEMODULATOR
GENERAL DESCRIPTION
The NJM2549 is a wide band IF IC with a maximum
IF input frequency of 15 MHz.
It includes an IF Amplifier, Quadrature Detector, RSSI
and IF Balanced Output.
PACKAGE OUTLINE
MAIN APPLICATIONS
RF ID
Radar detector
Wireless Infrared Communication System
Voice Transmission System
A few MHz band Signal Detector
NJM2549RB2
FEATURES
Wide Range Operating Voltage
Low Operating Current
Wide Range IF Input Frequency
Wide Band FM Detector Range
RSSI Quick Response
High FM Detection Sensitivity
IF Amplifier with Balanced Output
Bipolar Technology
Package Outline
2.7V to 9V (recommended supply voltage)
3mA (standard)
10.7MHz (standard)
100kHz to 15MHz (reference value)
DC to 1MHz (reference value)
22dBuV (- 3dB Limiting Sensitivity)
TVSP10
BLOCK DIAGRAM
AF
OUT
10
QUAD
IN
9
IF
OUT1
8
IF
OUT2
7
RSSI
OUT
6
QUAD
DET
IF AMP
RSSI
Ver.2010-06-24
12345
V+
IF
IN
IF IF
DEC1 DEC2
GND
-1-



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ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Supply Voltage
V+
Power Dissipation
Operating Temperature
PD
Topr
Storage Temperature
Tstg
RATINGS
10
300
- 40 to + 85
- 50 to + 125
wNJwMw25. 49D a t
(Ta=25°C)
UNIT
V
mW
°C
°C
RECOMMENDED OPERATIONAL CONDITION
PARAMETER
SYMBOL
TEST CONDITIONS
Supply Voltage
V+
MIN.
2.7
(Ta=25°C)
TYP. MAX. UNIT
3 9V
ELECTRICAL CHARACTERISTICS
(Ta = 25°C, V+ = 3V, IF IN = 10.7MHz / 80dBuV, fdev = ± 10kHz, fmod = 1kHz, unless otherwise noted)
PARAMETER
SYMBOL
TEST CONDITIONS
Current Consumption
Iccq
No Signal,
Test Circuit 1
IF
IF Input / Output Gain
IF Output Gain Frequency
Characteristics
IF Amplifier Input Resistance
IF Output Level
Duty Ratio of Wave IF Output
IF Output Current
G IF
f IF1
f IF2
RI IF
VO IF
DR IF
I OIF
IF IN = 20dBuV ,
Test Circuit 4
The ratio from the gain at 10.7MHz
to the gain at 1MHz,
Test Circuit 4
The ratio from the gain at 10.7MHz
to the gain at 15MHz,
Test Circuit 4
2 - 4 pin Resistance,
Test Circuit 3
RL = 15k, No Modulation,
Test Circuit 4
RL = 15k, No Modulation,
Test Circuit 4
No Signal,
Test Circuit 4
MIN.
-
TYP. MAX. UNIT
3 3.7 mA
70 75 80 dB
-3 0 3
dB
-4 -1 2
8.5 10 11.5 k
350 425 500 mVpp
44 50 58 %
230 290 350 uA
Ver.2010-06-24
-2-



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PARAMETER
SYMBOL
TEST CONDITIONS
MIN.
DETECTION
Demodulated DC Level
VO DC1
VO DC2
VO DC3
IF IN = 10.62MHz, No Modulation,
Test Circuit 1
IF IN = 10.7MHz, No Modulation,
Test Circuit 1
IF IN = 10.83MHz, No Modulation,
Test Circuit 1
-
0.8
2.7
Demodulated Signal Level
Demodulated Signal Level
of IF/3
VO AC1
VO AC2
Test Circuit 1
IF IN = 3.56667MHz, 100dBuV,
Test Circuit 1
120
100
12dB SINAD Sensitivity
12dBS/N Test Circuit 1
-
- 3dB Limiting Sensitivity
Signal to Noise Ratio
AM Rejection Ratio
Total Harmonic Distortion
AF Output pin Bias Current
Demodulated Signal
Frequency Characteristics
PI LIM
S/N
AMR
THD
IO AF
fDET
Measured at -3dB,
Test Circuit 1
Ratio of S+N and N,
Test Circuit 1
AM = 30%,
Test Circuit 1
fdev = ± 30kHz,
Test Circuit 1
No Signal,
Test Circuit 4
fdev = ±100kHz,
fmod = 1kHz to 1MHz,
Gain deflection, Test Circuit 6
-
-
-
-
160
-
RSSI
V RSSI1
No Signal,
Test Circuit 1
RSSI Output Voltage
V RSSI2
V RSSI3
IF IN = 45dBuV,
Test Circuit 1
IF IN = 80dBuV,
Test Circuit 1
V RSSI4
IF IN = 100dBuV,
Test Circuit 1
RSSI Output Resistance
RO RSSI
5 - 6 pin Resistance,
Test Circuit 3
RSSI Dynamic Range
RSSI Response
DRSSI
TRI
TFI
X = ( VRSSI3 - VRSSI2 ) / 35,
D1 = 45 - ( VRSSI2 - VRSSI1 ) / X,
D2 = 80 + ( VRSSI4 – VRSSI 3 ) / X,
DRSSI = D2 - D1
Time taken for RSSI Output
to
change from 10% to 90% after IF
signal turns on.
Test Circuit 7
Time taken for RSSI Output to
change from 90% to 10% after IF
signal turns off.
Test Circuit 7
The values shown in parenthesis are reference values.
-
350
1.5
1.8
12
-
-
-
TYP. MAX. UNIT
0.1 0.3
1.1 1.4
V
2.9 -
150 180
mVrms
130 160
33 -
dBuV
22 -
45 -
dB
45 -
0.5 -
%
205 250
uA
-2 - dB
10 50
mV
550 750
1.7 1.85
2 2.1
V
15 18 K
60 - dB
4-
usec
4-
Ver.2010-06-24
-3-



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TEST CIRCUIT
This test circuit allows the measurement of all parameters described in “ELECTRICAL CHARACTERISTICS”.
Test Circuit 1 (Detected Output: S-Curve)
Audio Analyzer
Input impedance = 100k
LPF = 30kHz
AF OUT
V+
T1
C7
0.01u
C6
82p
10 9
R2
2.4k
C5
3p 8
RSSI OUT
V
C4
100p
76
QUAD
DET
IF AMP
RSSI
1234
C1
0.01u
C2
0.01u
C3
0.01u
C9 C8 R1
10u
0.01u
51
Zo=50
IF IN
5
Test Circuit 2 (Detected Output: N-Curve, the Detected Output is reversed)
Audio Analyzer
Input impedance = 100k
LPF = 30kHz
AF OUT
V+
T1
C7
0.01u
C6
82p
R2
2.4k
10 9
8
C5
3p 7
RSSI OUT
V
C4
100p
6
QUAD
DET
IF AMP
RSSI
1234
C1
0.01u
C2
0.01u
C3
0.01u
C9 C8 R1
10u
0.01u
51
Zo=50
IF IN
5
T1:4CJH(Sample No.:080293006)
SAGAMI ELEC CO., LTD. (Japan)
Ver.2010-06-24
-4-



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