NJM2552
100MHz INPUT MIXER AND 450kHz FM/AM IF DEMODULATOR IC
!
GENERAL DESCRIPTION
!
PACKAGE OUTLINE
The
NJM2552
is a FM IF demodulator IC with 450kHz (standard)
IF input, which operates from 2.2V to 9.0V 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.
NJM2552V
!
FEATURES
#
#
#
#
#
Wide Operating Voltage
Low Operating Current
2.2V to 9.0V
FM: 2.5mA at V
+
=2.7V, AM SW =LOW
AM and FM: 5mA at V
+
=2.7V, AM SW =HIGH
100MHz (reference value)
450kHz (standard)
#
#
#
#
Maximum Mixer Input Frequency
IF Frequency
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
IN
20
AM AGC RF AGC
IN
OUT
18
17
RSSI
OUT
16
AM
SW
15
AM AF
OUT
14
AM
DET
AMP
OUT
13
AMP
IN
12
FM AF
OUT
11
V
+
19
-A
AMP
RSSI
MIXER
OSC
AMP
AGC
+ -
AM AMP
+
-
7
FM IF IN
8
FM
DEC
FM AMP
FM
DET
1
OSC
(B)
2
OSC
(E)
3
MIX
OUT
4
GND
5
AM IF
IN
6
AM
DEC
9
FM IF
OUT
10
QUAD
IN
Ver.2007-10-24
-1-
NJM2552
!
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
V
+
Pd
Topr
Tstg
RATINGS
12
300
-40 to +85
- 50 to +125
(Ta=25°C)
UNIT
V
mW
°C
°C
(Ta=25°C)
CONDITIONS
MIN.
2.2
TYP.
2.7
MAX.
9.0
UNIT
V
Supply Voltage
Power Dissipation
Operating Temperature
Storage Temperature
!
RECOMMENDED OPERATING CONDITION
PARAMETER
SYMBOL
V
+
Supply Voltage
!
ELECTRICAL CHARACTERISTICS
Ta=25°C, V =2.7V, fMIX=10.7MHz, fLO=10.25MHz, fIF=450kHz,
+
FM:
fdev=±3kHz, fmod=1kHz, AM SW=LOW
AM:
AM=30%, fmod=1kHz, AM SW=HIGH, unless otherwise noted.
PARAMETER
Current Consumption
Current Consumption
Mixer Conversion Gain
Mixer 3 rd Order Intercept
Mixer Input Resistance
Mixer Input Capacitance
Mixer Output Resistance
[FM IF Section]
SINAD 12dB
Demodulated Output Level 1
Total Harmonic Distortion 1
Signal to Noise Ratio 1
AM Rejection Ratio
SINAD
V od1
THD1
S/N1
AMR
Mixer input, Circuit 2
fIF input, Circuit 4
VinIF =80dBuV
fIF input, Cricuit4
VinIF =80dBuV
fIF input, Circuit4
VinIF=80dBuV
fIF input, Circuit4
VinIF=80dBuV
AM=30%
-
55
-
43
,
30
5
80
1
60
40
-
105
2
-
-
dBuV
mVrms
%
dB
dB
SYMBOL
Iccq1
Iccq2
Gmix
IIP3
R in M
Cin M
R oM
CONDITIONS
No signal, Circuit 1
AM SW=HIGH
No signal, Circuit 1
AM SW=LOW
VinMIX=40dBuV,
Pin3 with ceramic filter
and 1.8kΩ terminated.
Circuit5
Circuit5
MIN.
-
-
18
-
-
-
-
TYP.
5
2.5
22
95
3.6
3.2
1.8
MAX.
6.6
3.1
26
-
-
-
-
UNIT
mA
mA
dB
dBuV
kΩ
pF
kΩ
Ver.2007-10-24
-2-
NJM2552
PARAMETER
FM IF Amp. Input Impedance
RSSI Output Voltage 1
RSSI Output Voltage 2
RSSI Output Voltage 3
FM IF Amplifier
RF AGC Output Voltage
[AM IF Section]
Demodulated Output Level 2
Total Harmonic Distortion 2
Total Harmonic Distortion 3
Signal to Noise Ratio 2
Demodulated Output Deviation
AM IF Amplifier Input Impedance
[AMP Section]
Amplifier Gain
G v
31kHz, Circuit 3
-
47
-
dB
V od2
THD2
THD3
S/N2
D V od
RinAMIF
fIF input, Circutit4
VinIF =80dBuV
AGC On
fIF input, Cricuit4
VinIF =60dBuV
AGC On
fIF input, Cricuit4
VinIF =60dBuV,AM80%
AGC On
fIF input, Circutit4
VinIF =80dBuV
AGC On
fIF input, Cricuit4
VinIF =80 to 90dBuV
AGC On
DC value
42
-
-
40
60
1
2
44
±1.5
8
10
12
85
3
4
-
mVrms
%
%
dB
dB
kΩ
SYMBOL
RinFMIF
Vrssi1
Vrssi2
Vrssi3
FMIFGV
V
AGC
CONDITIONS
DC value
fIF input, Circuit4
No input signal
fIF input, Circuit4
VinIF=60dBuV
fIF input, Circuit4
VinIF=100dBuV
fIF input, Circuit4
fIF input, Circuit4
VinIF =80dBuV
MIN.
1.2
-
0.8
1.8
-
0.75
TYP.
1.8
0.1
1.1
2.1
120
1.05
MAX.
2.4
0.4
1.4
2.4
-
1.35
UNIT
kΩ
V
V
V
dB
V
!
AM SW pin select mode
Control Voltage
0V to 0.3V(LOW)
0.8V to V
+
(HIGH)
FM section
On
On
AM section
Off
On
Other sections
On
On
Ver.2007-10-24
-3-
NJM2552
!
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 position for the measurement of each
parameter.
#
Circuit 1 (Iccq1, Iccq2)
MIX IN
Iccq1
Iccq2
V
+
C15
10u
C14
0.1u
AM AGC RF AGC
IN
OUT
RSSI
OUT
V
+
AM
SW
AM AF
OUT
AMP
OUT
AMP
IN
FM AF
OUT
C16
20
19
10u
18
C8
1000p
17
C7
1000p
16
15
AM
DET
14
13
R4
270k
12
11
-A
AMP
RSSI
MIXER
OSC
AMP
AGC
+ -
AM AMP
+
-
7
C4
68n
C5
0.1u
8
FM AMP
FM
DET
1
C1
1000p
2
3
4
5
C3
68n
6
9
C6
0.1u
10
V
+
R10
LOCAL IN
1.5k
#
Circuit 2 (SINAD)
MIX IN
10.7
MHz
V
+
AM AGC RF AGC
IN
OUT
RSSI
OUT
V
+
AM
SW
AM AF
OUT
AMP
OUT
AMP
IN
FM AF
OUT
BPF
SINAD
0.1k to 30k
R4
270k
R9
10k
12
11
C12
0.01u
R2
51
20
C2
1000p
19
C16
10u
18
C8
1000p
17
C7
1000p
16
15
AM
DET
14
13
-A
AMP
RSSI
MIXER
OSC
AMP
AGC
+ -
AM AMP
+
-
7
C4
68n
C5
0.1u
8
FM AMP
FM
DET
1
C1
1000p
2
3
4
5
C3
68n
CERAMIC
FILTER
6
9
C6
0.1u
C13
18p
R10
1.5k
10
V
+
CD
C17
10u
LOCAL IN
10.25
MHz
Ver.2007-10-24
-4-
NJM2552
#
Circuit 3 (Gv)
Gv
MIX IN
V
+
AM AGC RF AGC
IN
OUT
RSSI
OUT
V
+
AM
SW
C9
1u
R4
270k
20
19
18
17
16
15
AM
DET
14
13
12
11
AM AF
OUT
AMP
OUT
AMP
IN
C10
1u
R5
1k
FM AF
OUT
31kHz
-A
AMP
RSSI
MIXER
OSC
AMP
AGC
+ -
AM AMP
+
-
7
8
FM AMP
FM
DET
1
C1
1000p
LOCAL IN
2
3
4
5
6
9
10
#
Circuit 4 (Vod1/2, THD1/2/3, S/N1/2, AMR, Vrssi1/2/3, FMIFGV, VAGC, DVod )
BPF
Vod2 DVod
THD2 S/N2
THD3
AMP
OUT
AMP
IN
FM AF
OUT
VAGC Vrssi
MIX IN
V
+
0.1k to 30k
AM AF
OUT
R8
8.2k
AM AGC RF AGC
IN
OUT
R3
20k
C16
C8
1000p
17
RSSI
OUT
V
+
Vod1
THD1
S/N1
AMR
C7
1000p
16
15
C11
0.01u
14
AM
DET
13
12
R9
10k
11
C12
0.01u
20
19
10u
18
-A
AMP
RSSI
MIXER
OSC
AMP
AGC
+ -
AM AMP
+
-
7
C4
68n
C5
0.1u
8
FM AMP
FM
DET
1
C1
1000p
2
3
4
5
C3
68n
6
9
C6
0.1u
C13
18p
R10
1.5k
10
V
+
CD
C17
10u
LOCAL IN
450kHz
51
FMIFGV
Ver.2007-10-24
-5-
MEMS传感器
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