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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=25C) UNIT V mW C C (Ta=25C) 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=25C, 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 1.8k 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 k pF k
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 Gv 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 k 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 k 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+ AM AGC RF AGC IN OUT R3 20k C16 20 19 10u 18 C8 1000p 17 C7 1000p 16 15 RSSI OUT V+
0.1k to 30k AM AF OUT R8 8.2k C11 0.01u 14 AM DET 13 12
Vod1 THD1 S/N1 AMR
R9 10k 11
C12 0.01u
-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-
NJM2552
# Circuit 5 (Gmix)
10.7MHz MIX IN V+ AM AGC RF AGC IN OUT RSSI OUT V+ AM SW R2 51 20 C2 1000p 19 18 17 16 15 AM DET 14 13 12 11 AM AF OUT AMP OUT AMP IN FM AF OUT
-A
AMP
RSSI MIXER
OSC AMP
AGC +-
AM AMP
+ 7 8
FM AMP
FM DET
1 C1 1000p
2
3
4
5
6
9
10
LOCAL IN 10.25MHz
CERAMIC FILTER
Gmix
1.8k
Ver.2007-10-24
-6-
NJM2552
!
TERMINAL FUNCTION (Ta=25C , V+=2.7V , circuit 1)
Pin No. SYMBOL
V+
EQUIVARENT CIRCUIT
VOLTAGE
FUNCTION Oscillator Base / Oscillator Emitter Colpitts - type oscillator is formed with an external oscillator element of crystal unit or SAW resonator. Output of an external oscillator circuit can also input to pin1 or pin2.
1
OSC (B)
22k
1 2
2k
2.66V
2
OSC (E)
GND
170u
1.95V
V+ 200k 20p
Mixer Output An external 450kHz ceramic filter is connected. The typical output impedance is 1.8k. 1.75V
3
MIX OUT
3
1.4k
135u GND
4
GND
V+
-
--
Ground AM IF Input This is an AM IF signal input to AGC amplifier. The typical input impedance is 10k.
5
AM IF IN
5 6
10k
25u
1.35V
6
AM DEC
GND
1.24V
1.35V
AM IF Decoupling This is an AM IF decoupling terminal for AGC amplifier. An external decoupling capacitor is connected to enhance stability. IF Limiter Amplifier Input This is an input to the IF amplifier after passing through 450kHz ceramic filter. The typical input impedance is 1.8k. IF Decoupling An external decoupling capacitor is connected to enhance stability.
V+
7
FM IF IN
7 8
51k 0.9k
2.66V
0.9k
8
2k
FM DEC
GND
80u
2.66V
Ver.2007-10-24
-7-
NJM2552
Pin No. SYMBOL EQUIVARENT CIRCUIT
V+
VOLTAGE
FUNCTION FM IF Output This is an output of FM IF signal passing though the internal FM amplifier. An external phase - shifting capacitor is connected between pin9 and pin10.
9
FM IF OUT
9
95u GND
1.80V
V+ 400 400
Quadrature Detector Input An external phase - shifting coil or ceramic discriminator is connected. 2.70V
10
QUAD IN
10
20u GND
V+
FM Demodulated Signal Output An external 3rd order multiple feed -back filter (RC filter) is connected.
95u 100k 10p
11
FM AF OUT
11
0.96V
GND
V+
12
AMP IN
20u
0.66V
Input of Amplifier for Low Pass Filter External RC components form a low pass filter between pin12 and pin13. This terminal is biased from pin 11 though an external RC filter. Output of Amplifier for Low Pass Filter
12
13
13
AMP OUT
7.3k GND
0.71V
Ver.2007-10-24
-8-
NJM2552
Pin No. SYMBOL EQUIVARENT CIRCUIT
V+
VOLTAGE
FUNCTION AM Demodulated Signal Output An external RC filter may be connected to reduce undesired signal.
100u
14
AM AF OUT
14
1.46V
GND
AM Section ON /OFF Switch Both of AM and FM section are in action during AM SW=HIGH. When AM SW=LOW, AM section keeps a state of not working. 15 AM SW
15
GND 50k
--
V+ 2k 2k 2k 2k
Received Signal Strength Indicator Output Pin 16 outputs DC level proportional to the log of input signal level to pin7. 0.17V
16
RSSI OUT
16
55k GND
V+ 2k
Output of RF AGC circuit Pin 17 outputs DC voltage to control the gain of external RF amplifier. 0.08V
17
RF AGC OUT
17
120k GND
Ver.2007-10-24
-9-
NJM2552
Pin No. SYMBOL
V+
EQUIVARENT CIRCUIT
VOLTAGE
FUNCTION Gain Control of AGC Circuit for AM Signal Pin 18 is connected with pin 14 through the external ripple filter of R and C.
18
AM AGC IN
18
1k
1.46V
25u GND
25u
1.51
19
V+
V+
Supply Voltage Mixer Input The mixer is designed to work up to 100MHz with the typical input impedance of RinM = 3.6k and CinM = 3.2pF(at 10.7MHz). 0.94V
3.6k 50 25p GND 1k 1k 0.94
20
MIX IN
20
3.6k
Note : 1. ESD protection diodes exist between each of the following pins and V+. Pin 1,2,3,5,6,7,8,9,10,11,12,13,14,16,17,18,20 2. ESD protection diodes also exist between each of the following pins and ground. Pin 1,2,3,5,6,7,8,9,10,11,12,13,14,15,16,17,18,20
Ver.2007-10-24
- 10 -
NJM2552
! 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 V+ C15 10u R2 51 C2 C14
AM AGC RF AGC IN OUT R3 20k C8 1000p 17
RSSI OUT
AM AF OUT V+ R8 8.2k
AMP OUT
AMP IN C10
FM AF OUT
C9 1u R4 270k 13 12
1u R5 1k R9 10k 11 C12 0.01u
0.1u C16 10u 18
C7 1000p 16 15
C11 0.01u 14 AM DET
1000p 20 19
-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
Note: 1. External Components R1=R6=R7=0 R2=51 R3=20k R4=270k R5=1k R8=8.2k R9=10k R10=1.5k C1=C2=C7=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.2007-10-24
- 11 -
NJM2552
#
Circuit Side View
LOCAL IN (OSC(B)) RF IN (MIX IN)
R2
R1
C2
C1
R3
C7
RF AGC OUT RSSI OUT
NJM2552
C3 C4 C6 C13
R4 C5
R5
C9
C8
R6
R8
C11
CD
R9
HIGH OFF AM SW ON
R7
R10
C10
LOW
C12
AM AF OUT
NJM2552
GND V+ V
+
FM AF OUT
AMP IN
AMP OUT
#
Ground Side View
C16
+
C14
C15
+
CF
C17
+
Ver.2007-10-24
- 12 -
NJM2552
! Description # AM AGC Line 1. Example of external circuit
C16 10u
+
R3 20k
AM AF OUT
FM AF OUT
AM AGC Line
20
19
18
17
16
15
14
13
12
11
AGC IN
AM DET
-A
AMP
RSSI MIXER
OSC AMP
AGC
+-
AM AMP AM IF
+ 6 7 8
FM AMP
FM DET
1
2
3
4
5
9
10
CERAMIC FILTER
#
Explanation AM AGC IN terminal (pin18) is usually connected with the AM DET terminal (pin 14) through the ripple filter of R3 and C16. This filter has the time constant of R3xC16 and this value of time constant is generally selected to be 5 to 10 times larger than the lowest cycle of the AM modulation signal (, not AM demodulated signal). AGC IN terminal (pin 18) can also be controlled by an external DC source instead of DC output of AM DET terminal. RF AGC Line RF AGC Line + + V+ V+ V 1. Example of external circuit V
RF IN Tr3 Tr2
2.
RF Amplifier
20 19 18 17 16
MIX IN
V V+
+
2k
from IF Am p
RF AGC OUT
Tr1 127k 120k
2.
Explanation RF AGC OUT terminal (pin17) can be connected to the bias circuit of the external RF amplifier to control its gain. RF AGC characteristics are shown on following page.
Ver.2007-10-24
- 13 -
NJM2552
! TYPICAL CHARACTERISTICS
Ta=25C, 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.
+
[DC Characteristics]
Current Consumption versus Supply Voltage
8
Current Consumption Iqq(mA)
circuit 1, no signal
Current Consumption versus Temperature
8
circuit 1, no signal
7 6 5 4 Iccq2 3 2 1 0 0 2 4 6 8
+
Current Consumption Iqq(mA)
7 6 5 4 3 2 1 0 Iccq2 Iccq1
Iccq1
10
12
-50
-25
0
25
50
75
100
125
Supply Voltage V (V)
Ambient Temperature Ta(C)
Current Consumption versus AM SW Voltage
8
circuit 1, no signal
Current Consumption Iccq(mA)
7 6 5 4 3 2 1 0 0 0.5 1 1.5 2 2.5 3 Low AM SW : High
AM SW Control Voltage (V)
Ver.2007-10-24
- 14 -
NJM2552
[Mixer Characteristics]
Mixer Conversion Gain versus Frequency and Supply Voltage
30
Mixer Conversion Gain Gmix(dB)
circuit 5, VinMIX=40dBuV, VinLO=100dBuV
Mixer Conversion Gain versus Frequency and Temperature
30 Mixer Conversion Gain Gmix(dB)
circuit 5 , VinMIX=40dBuV , VinLO=100dBuV
25
V+=9V V+=2.7V
25 Ta=25C 20 Ta=- 40C Ta=85C 15
20 V =2.2V 15
+
10 10 100 Mixer Input Frequency fMIX(MHz) 1000
10 10 100 Mixer Input Frequency fMIX(MHz) 1000
Mixer 3rd Order Intermodulation
120
circuit 5, VinLO=100dBuV
Mixer Conversion Gain vesus Local Input Level
25
circuit 5, VinMIX=40dBuV
1dB Comp.Pt.
100 80 60 40 20 0 0 20 40 60 80 100 120
IIP3
Mixer Conversion Gain Gmix(dB)
Mixer Output Level (dBuV)
20 15 Ta=- 40C 10 Ta= 25C 5 Ta=85C 0 40 60 80 100 120
Desired Products
3rd Order Intermod. Products
Mixer Input Level VinMIX(dBuV)
Local Input Level VinLO(dBuV)
Ver.2007-10-24
- 15 -
NJM2552
[RSSI Characteristics]
RSSI Output versus IF Input and Supply Voltage
3
circuit 4
RSSi Output versus IF Input and Ambient Temperature
RSSI Output Voltage Vrssi(V)
V = 9V
+
3 2.5 2
circuit 4
RSSI Output Voltage Vrssi(V)
2.5 2
2.7V 2.2V
Ta=85C, 25C
- 40C 1.5 1 0.5 0
1.5 1 0.5 0 -20 0 20 40 60 80 100 120
-20
0
20
40
60
80
100
120
IF Input Level VinIF(dBuV)
IF Input Level VinIF(dBuV)
RSSI Output versus Mixer Input and Supply Voltage
3 circuit 2 , VinLO=100dBuV
RSSI Output versus Mixer Input and Ambient Temperature
3
circuit 2 , VinLO=100dBuV
RSSI Output Voltage Vrssi(dB)
RSSI Output Voltage Vrssi(V)
V = 9V 2.5 2 V+=2.2V 1.5 1 0.5 0 -20 0 20 40 60 80 100 120 V =2.7V
+
+
2.5 2
Ta=85C, 25C
- 40C 1.5 1 0.5 0 -20 0 20 40 60 80 100 120
Mixer Input Level VinMIX(dBuV)
Mixer Input Level VinMIX(dBuV)
RSSI Output versus Temperature and IF Input Level
3
RSSI Output Voltage Vrssi(V)
circuit 4
2.5 2 1.5 1 0.5 0 -50 -25 0
100dBuV VinMIX=120dBuV 90dBuV 80dBuV 70dBuV 60dBuV 50dBuV 40dBuV
- 20dBuV
25 50 75 100 125
Ambient Temperature Ta(C)
Ver.2007-10-24
- 16 -
NJM2552
[RF AGC Characteristics]
RF AGC Output versus IF Input and Supply Voltage
2.4 2.2 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0
circuit 4
RF AGC Output versus IF Input and Ambient Temperature
2.4 2.2 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0
circuit 4
RF AGC Output Voltage VAGC(V)
V+=9.0V
RF AGC Output Voltage VAGC(V)
2.7V 2.2V
Ta=85C, 25C, - 40C
0
20
40
60
80
100
120
-20
0
20
40
60
80
100
120
IF Input Level VinIF(dBuV)
IF Input Level VinIF(dBuV)
RF AGC Output versus Mixer Input and Supply Voltage
2.4 2.2 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0
circuit 2 , VinLO=100dBuV
RF AGC Output versus Mixer Input and Ambient Temperature
2.4 2.2 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0
circuit 2 , VinLO=100dBuV
RF AGC Output Voltage (V)
RF AGC Output Voltage (V)
V+=9.0V 2.7V 2.2V
Ta=85C, 25C, - 40C
-20
0
20
40
60
80
100
120
-20
0
20
40
60
80
100
120
Mixer Input Level VinMIX(dBuV)
Mixer Input Level VinMIX(dBuV)
RF AGC Output versus Temperature and IF Input Level
2
RF AGC Output Voltage VAGC(V)
circuit 4 VinMIX=120dBuV 90dBuV 85dBuV 80dBuV
1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 -50 -25 0
75dBuV 70dBuV
- 20dBuV 25 50 75 100 125
Ambient Temperature Ta(C)
Ver.2007-10-24
- 17 -
NJM2552
[FM Demodulation Characteristics]
FM AF OUT Voltage versus Frequency and Supply Voltage (S-Curve)
2.5 FM AF OUT Voltage(V) 2 1.5 1 0.5 0 420 430 440 450 460 470 480 V+=2.7V 2.2V
circuit 4 , VinIF=80dBuV
FM AF OUT Voltage versus Frequency and Ambient Temperature (S-Curve)
2.5
circuit 4 , VinIF=80dBuV
V+=9.0V FM AF OUT Voltage(V) 2 Ta=85C 1.5 Ta=- 40C 1 0.5 0 420 430 440 450 460 470 480 Ta= 25C
IF Input Frequency fIF(kHz)
IF Input Frequency fIF(kHz)
FM Demod. Output versus FM Modulation Frequency
200 180
circuit 4, VinIF=80dBuV
FM Demod.Output and Distortion -IF Detuning Characteristics1000 FM Demodulated Output Level1 Vod1(mVrms)
circuit 4 , VinIF=80dBuV
1000
FM Demodulated Output Level1 Vod1(mVrms)
140 120 100 80 60 40 20 0 0.1 1 10 100
10
THD1
10
1
1
0.1 430 440 450 460
0.1 470
FM Modulation Frequency fmod(kHz)
IF Input Frequency fIF(kHz)
FM : S+N, N, AMR, SINAD, THD1 versus Mixer Input Level
10 0
circuit 2 , VinLO=100dBuV
FM : S+N, N, AMR, SINAD, THD1 versus IF Input Level
80
10 0
SINAD(dB), THD1(%)
circuit4
80 S+N 70 60 SINAD 50 40 AMR N 30 20 10 THD1 0 100 120
S+N
70
-20 SINAD -30 -40 -50 -60 THD1 -70 -20 0 20 40 60 80 N AMR
50 40 30 20 10 0 100 120
S+N, N, AMR (dB)
S+N, N, AMR (dB)
-10
60
-10 -20 -30 -40 -50 -60 -70 -20 0 20 40
60
80
Mixer Input Level VinMIX(dBuV)
IF Input Level VinIF(dBuV)
Ver.2007-10-24
- 18 -
SINAD(dB), THD1(%)
Distortion THD1(%)
160
Vod1 100 100
NJM2552
[AM Demodulation Characteristics]
AM30% : Demod. Output and Distortion versus IF Input Level
1000
AM Demodulated Output Level Vod2(mVrms)
circuit4, AM=30%
AM30% : Demod. Output and Distortion versus Mixer Input Level
1000 AM Demodulated Output
circuit 2 , VinLO=100dBuV , AM=30%
1000
1000 Vod2
100
100
100
100
10
10
10
10
1 THD2 0.1 -20 0 20 40 60 80
1
1 THD2 0.1 -20 0 20 40 60
1
0.1 100 120
0.1 80 100 120
Mixer Input Level VinMIX(dBuV)
IF Input Level VinIF(dBuV)
AM30% : S+N, N versus Mixer Input Level
10 0 -10
circuit 2 , VinLO=100dBuV , AM=30%
AM30% : S+N, N versus IF Input Level
10 0 -10
circuit4 , AM=30%
S+N
S+N
S+N, N (dB)
-20 -30 -40 -50 -60 -70 -20 0 20 40 60 80 100 120 N
S+N, N (dB)
-20 -30 N -40 -50 -60 -70 -20 0 20 40 60 80 100 120
Mixer Input Level VinMIX(dBuV)
IF Input Level VinIF(dBuV)
AM30% : Demodulated Output Level versus Supply Voltage
85 80 AM Demodulated Output Level Vod2(mVrms) 75 70 65 60 55 50 45 40 2 4 6 8
+
AM30% : Demodulated Output Level versus Ambient Temperature
85 80
circuit4, VinIF=80dBuV, AM=30%
circuit 4 , VinIF=80dBuV , AM=30%
AM Demodulated Output Level Vod2(mVrms)
75 70 65 60 55 50 45 40
10
12
-50
-25
0
25
50
75
100 125
Supply Voltage V (V)
Ambient Temperature Ta(C)
Ver.2007-10-24
- 19 -
Distortion THD2(%)
Level Vod2(mVrms)
Distortion THD2(%)
Vod2
NJM2552
AM80% : Demod. Output and Distortion versus Mixer Input Level
1000
circuit 2 , VinLO=100dBuV , AM=80%
AM80% : Demod. Output and Distortion versus IF Input Level
1000
circuit4, AM=80%
1000
1000 Vod2
AM Demodulated Output
AM Demodulated Output Level Vod2(mVrms)
Vod2
Level Vod2(mVrms)
100
100
100
100
10
10
10
10
1 THD3 0.1 -20 0 20 40 60 80
1
1 THD3
1
0.1 100 120
0.1 -20 0 20 40 60
0.1 80 100 120
Mixer Input Level VinMIX(dBuV)
IF Input Level VinIF(dBuV)
AM80% : S+N, N versus Mixer Input Level
10 0 -10
circuit 2 , VinLO=100dBuV, AM=80%
AM80% : S+N, N versus IF Input Level
10 0 -10
circui4 , AM=80%
S+N
S+N
S+N, N (dB)
-20 -30 -40 -50 -60 -70 -20 0 20 40 60 80 100 120 N
S+N, N (dB)
-20 -30 -40 N -50 -60 -70 -20 0 20 40 60 80 100 120
Mixer Input Level VinMIX(dBuV)
IF Input Level VinIF(dBuV)
AM Demodulated Output versus AM Modulation Frequency
100 90
circuit4(BPF less), VinIF=80dBuV, AM=30%
AM Demodulated Output versus IF Input Frequency
100 90 AM Demodulated Output Level Vod2(mVrms) 80 70 60 50 40 30 20 10 0 fif=450kHz
circuit4, VinIF=80dBuV, AM=30%
AM Demodulated Output Level Vod2(mVrms)
80 70 60 50 40 30 20 10 0 0.1 1 10 100
0.1
1
10
100
AM Modulation Frequency fmod(kHz)
IF Input Frequency fIF(MHz)
Ver.2007-10-24
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Distortion THD3(%)
Distortion THD3(%)
NJM2552
[CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.
Ver.2007-10-24
- 21 -

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