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PDF NJM2552 Data sheet ( Hoja de datos )
| Número de pieza | NJM2552 | |
| Descripción | FM IF Demodulator IC / SSOP20 | |
| Fabricantes | JRC | |
| Logotipo |  |
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NJM2552
www.DataSheet4U.com
100MHz INPUT MIXER AND 450kHz FM/AM IF DEMODULATOR IC
GENERAL DESCRIPTION
The NJM2552 is a FM IF demodulator IC with 450kHz (standard)
IF input, which operates from 2.2V to 9V supply. It includes an oscillator,
mixer, limiting amplifier, FM/AM detectors, and RSSI circuit.
The NJM2552 is suitable for FM /AM receivers for data / voice radio
systems.
PACKAGE OUTLINE
NJM2552V
FEATURES
Wide Operating Voltage
2.2V to 9.0V
Low Operating Current
FM: 2.5mA at V+ =2.7V, AM SW =Low
AM and FM: 5mA at V+ =2.0V, AM SW =High
Maximum Mixer Input Frequency 100MHz (reference value)
IF Frequency
450kHz (standard)
AM/FM detector circuits selectable
AM SW= High
Simultaneous operation of AM/FM sections
AM SW= Low
FM section only
Built-in AGC circuit in AM section
Wide Range RSSI (Received Signal Strength Indication)
Bipolar Technology
Package Outline
SSOP20
BLOCK DIAGRAM
MIX AM AGC RF AGC RSSI
IN V+ IN OUT OUT
20 19 18 17 16
AM AM AF
SW OUT
15 14
AM
DET
AMP
OUT
13
AM P
IN
12
FM AF
OUT
11
-A AMP
M IXER
RSSI
OSC
AMP
AGC
+-
AM AMP
+ FM AMP
-
FM
DET
1
OSC
(B)
2
OSC
(E)
3
MIX
OUT
4
GND
5
AM IF
IN
678
AM
DEC
FM IF IN
FM
DEC
9
FM IF
OUT
10
QUAD
IN
Ver.2006-11-06
-1-
1 page  
www.DataSheet4U.com
Circuit 3 (Gv)
MIX IN
20
AM AGC RF AGC RSSI
IN OUT OUT
V+
19 18 17 16
AM AF
OUT
V+
AM
SW
15 14
AM
DET
Gv
AMP
OUT
AMP
IN
C9
C10 FM AF
1u OUT
1u R5
R4 1k
270k
13 12 11
-A AMP
M IXER
RSSI
NJM2552
31k Hz
OSC
AM P
AGC + - AM AMP
123 456
C1
1000p
LOCAL IN
+ FM AMP
-
FM
DET
7 8 9 10
Circuit 4 (Vod1/2, THD1/2/3, S/N1/2, AMR, Vrssi1/2/3, FMIFGV, VAGC, DVod )
MIX IN
20
BPF
VAGC Vrssi
AM AGC RF AGC RSSI
IN OUT OUT
V+ R3
V+
0.1k to 30k
AM AF
OUT
20k R8
8.2k
C16 C8
C7
C11
10u 1000 1000
0.01u
19 18 17 16 15 14
AM
DET
Vod2 Dvod
THD2 S/N2
THD3
AM P
OUT
AMP FM AF
IN OUT
Vod1
THD1
S/N1
AMR
R9 C12
10k 0.01u
13 12 11
-A AMP
M IXER
RSSI
OSC
AM P
AGC + - AM AMP
+ FM AMP
-
FM
DET
12
C1
1000p
LOCAL IN
34
450k Hz
5
C3
68n
51
6
C4
68n
789
C5 C6 C13
0.1u 0.1u 18p
R10
1.5k
FMIFGv
10
CD
V+
C17
10u
Ver.2006-11-06
-5-
5 Page 
NJM2552
www.DataSheet4U.com
EVALUATION PC BOARD
The evaluation board is useful for your design and to have more understanding of the usage and performance of
this device. This circuit is the same as TEST CIRCUIT. Note that this board is not prepared to show the
recommendation of pattern and parts layout.
Circuit Diagram
MIX
IN
AM AGC RF AGC RSSI
IN OUT OUT
V+ R3
C15 C14
10u 0.1u C16
R2 C2
10u
51 1000p
20 19 18
20k
C8
1000
17
C7
1000
16
AM AF
OUT
V+
15
R8
8.2k
C11
0.01u
14
AM
DET
M IXER
RSSI
AM P
OUT
AMP FM AF
IN OUT
C10
C9 1u
1u R5
R4 1k
270k
13 12
R9
10k
11
C12
0.01u
-A AMP
OSC
AMP
AGC
+-
AM AMP
+ FM AMP
-
FM
DET
12
C1
1000p
LOCAL IN
34
C1
1000p
5
C3
68n
CERAMIC
FILTER
6
C4
68n
7
C5
0.1u
8
C6
0.1u
9
C13
18p
R10
1.5k
10
CD
V+
C17
10u
Note:
1. External Components
R1=R6=R7=0Ω R2=51Ω R3=20kΩ R4=270kΩ R5=1kΩ R8=8.2kΩ R9=10kΩ R10=1.5kΩ
C1=C2=C7=C8=1000pF C3=C4=68nF C5=C6=C14=0.1uF C9=C10=1uF
C11=C12=0.01uF C13=18pF C15=C16=C17=10uF
CF=CFWCA450KEFA-R0 (Murata manufacturing Co., Ltd.)
CD=CDBCB450KCAY72-R0 (Murata manufacturing Co., Ltd.)
Ver.2006-11-06
- 11 -
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet NJM2552.PDF ] | |
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