NJM14570
Ver.2017-03-29 - 1 -
DET OUT QUAD COIL V+ RSSI OUT
IF INGNDDECOUPLE1DECOUPLE2
1 2 3 4
5678
RSSI
IFAMP
V+
GND
WIDE BAND FM IF DEMODULATOR
GENERAL DESCRIPTION PACKAGE OUTLINE
The NJM14570 is a wide band IF IC with a maximum IF input frequency of 15 MHz. It includes an IF Amplifier, Quadrature Detector and RSSI.
MAIN APPLICATIONS
RF ID Radar detector Wireless Infrared Communication System Voice Transmission System A few MHz band Signal Detector
FEATURES
Wide Range Operating Voltage 1.8V to 9V (recommended supply voltage) Low Operating Current 2.9mA ( Typ., No Signal ) Wide Range IF Input Frequency 10.7MHz ( Standard )
up to 15MHz ( Reference ) Wide Band FM Detector Range DC to 1MHz ( Reference ) High FM Detection Sensitivity - 87dBm ( 12dB SINAD, typ. ) Package Outline MSOP8 ( TVSP ) *
*JEDEC MO-187-DA / thin type
BLOCK DIAGRAM
NJM14570RB1
NJM14570
Ver.2017-03-29 - 2 -
ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER SYMBOL RATINGS UNIT
Supply Voltage V+ 10 V
Power Dissipation P D 410 mW
Operating Temperature T o p r - 40 to + 85 °C
Storage Temperature T s t g - 50 to + 125 °C
RECOMMENDED OPERATIONAL CONDITION (Ta=25°C)
PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT
Supply Voltage V+ 1.8 3.0 9.0 V
ELECTRICAL CHARACTERISTICS
(Ta = 25°C, V+ = 3V, IF IN = 10.7MHz / - 30dBm, fdev = ± 50kHz, fmod = 1kHz, unless otherwise noted)
PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT
Current Consumption Iccq No Signal - 2.9 4.1 mA
DETECTION
Output Voltage VOUT 60 100 160 mVrms
Total Harmonics Distortion THD - 0.5 2.0 %
Signal to Noise Ratio S/N 54 60 - dB
12dB SINAD SINAD - - 87 - 81 dBm
Limiter Input Resistance RLIM - 330 - Ω
RSSI
RSSI Output Voltage
VRSSI1 No Signal 0.00 0.05 0.30 V
VRSSI2 - 60 dBm, No Modulation 0.20 0.40 0.60 V
VRSSI3 - 30 dBm, No Modulation 0.80 1.05 1.30 V
VRSSI4 0 dBm, No Modulation 1.20 1.50 1.80 V
NJM14570
Ver.2017-03-29 - 3 -
DET OUT V+ RSSI OUT
51 SG0.01u
8.2k
1000p
0.01u
0.01u
2.7k 82
p
0.01
u
4.7u
IFT0.01u
1 2 3 4
5678
RSSI
IFAMP
V+
GND
IF IN
0.01u
TEST CIRCUIT This test circuit allows the measurement of all parameters described in “ELECTRICAL CHARACTERISTICS”.
IFT:10.7MHz IF Transformer
NJM14570
NJM14570
Ver.2017-03-29 - 4 -
EVALUATION 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
PRINTED CIRCUIT BOARD Top View Bottom View
List of Component Items Designation Value Items Designation Value
Capacitor C1 0.01uF Resistor R1 51Ω For testing purposes only Capacitor C2 0.01uF
Capacitor C3 0.01uF Resistor R2 2.7kΩ Capacitor C4 1000pF Resistor R3 8.2kΩ Capacitor C5 0.01uF Capacitor C6 82pF Transformer IFT 10.7MHz IF Transformer Capacitor C7 0.01uF Capacitor C8 0.01uF IC NJM14570 NJM14570RB1 Capacitor C9 4.7uF
NJM14570
DET OUT V+ RSSI OUT
IF IN
R1C2
R3
C1
C4
C3
C7R2 C6
C8C9IFTC5
1 2 3 4
5678
RSSI
IFAMP
V+
GND
NJM14570
Ver.2017-03-29 - 5 -
1
6
3
80
2
6
3
20
2p
30k
TERMINAL FUNCTION (Ta = 25°C, V+ = 3V, No signal ) Pin No. SYMBOL EQUIVARENT CIRCUIT VOLTAGE FUNCTION
1 DET OUT
1.5V FM Detector Output
2 QUAD COIL
3.0V FM Detector Input Connection for the phase shift circuit.
3 6
V+
GND
3.0V 0.0V
3pin:Supply Voltage 6pin:GND Terminal
4 RSSI OUT
--
Received Signal Strength Indicator Output Pin4 outputs DC level proportional to the log of pin5 input signal level.
5 7 8
IF IN DECOUPLE1 DECOUPLE2
2.6V
5pin: IF Amplifier Input 7,8pin: IF Decoupling An external decoupling capacitor is connected to enhance stability. The bandwidth of IF Amplifier can be adjusted. Large capacity: wide band Small capacity: narrow band
6
3
4
6
3
80
10.2k
6
3
5
7
8330 330
100k 100k
NJM14570
Ver.2017-03-29 - 6 -
TYPICAL CHARACTERISTICS Ta = 25°C, V+ = 3V, IF IN = 10.7MHz / - 30dBm, fdev = ± 50kHz, fmod = 1kHz, unless otherwise noted
0
4
8
12
16
20
-100
-80
-60
-40
-20
0
-120 -100 -80 -60 -40 -20 0 20T.
H.D
. ( %
)
S+N
, N, A
M O
UT
( dBV
)
IF Input Level Vin ( dBm )
S+N, N, T.H.D., AM OUT vs. IF Input Level
S+N
T.H.D.
AM OUT( 30% mod. )
N
0
4
8
12
16
20
-100
-80
-60
-40
-20
0
9.5 9.9 10.3 10.7 11.1 11.5 11.9
T.H
.D. (
% )
V OU
T( d
BV )
IF Input Frequency fin ( MHz )
VOUT, T.H.D. vs. IF Input Frequency
VOUT
T.H.D.
0.0
0.5
1.0
1.5
2.0
2.5
3.0
9.5 9.9 10.3 10.7 11.1 11.5 11.9
Out
put D
C V
olta
ge (
V )
IF Input Frequency fin ( MHz )
S-Curve Characteristic( Output DC Voltage vs. IF Input Frequency)
No Modulation
0.0
1.0
2.0
3.0
4.0
5.0
0
20
40
60
80
100
120
140
160
180
200
1 2 3 4 5 6 7 8 9
T.H
.D. (
% ),
Iccq
( m
A )
V OU
T( m
Vrm
s )
Supply Voltage V+ ( V )
VOUT, T.H.D., Iccqvs. Supply Voltage
VOUT
T.H.D.
Iccq ( No Signal )
0.0
0.5
1.0
1.5
2.0
2.5
-120 -100 -80 -60 -40 -20 0 20
RS
SI O
utpu
t Vol
tage
VR
SS
I( V
)IF Input Level Vin ( dBm )
RSSI Output Voltage vs. IF Input Level and Supply Voltage
V+ = 9.0V
5.0V
1.8V
3.0V
No Modulation
-100
-90
-80
-70
-60
-50
30
40
50
60
70
80
1 2 3 4 5 6 7 8 9 -3dB
Lim
iting
Sen
sitiv
ity ,
12dB
SIN
AD (
dB
m )
S/N
( dB
)
Supply Voltage V+ ( V )
S/N, -3dB Limiting Sensitivity, 12dB SINADvs. Supply Voltage
-3dB Limiting Sensitivity
12dB SINAD
S/N
NJM14570
Ver.2017-03-29 - 7 -
Electrical characteristics by changing damping resistor RD
Ta = 25°C, V+ = 3V, IF IN = 10.7MHz / - 30dBm, fdev = ± 50kHz, fmod = 1kHz, unless otherwise noted
-12
-10
-8
-6
-4
-2
0
2
1 10 100 1000
VO
UT
( dB
)
FM Modulation Frequency fmod ( kHz )
FM Demodulated Output Levelvs. FM Modulation Frequency
and RD
RD = 2.7kΩ
1.8kΩ
1.2kΩ
0.0
0.5
1.0
1.5
2.0
2.5
3.0
9.5 9.9 10.3 10.7 11.1 11.5 11.9
Out
put D
C V
olta
ge (
V )
IF Input Frequency fin ( MHz )
S-Curve Characteristic( Output DC Voltage vs. IF Input Frequency
and RD )
RD = 2.7kΩ
1.8kΩ1.2kΩ
No Modulation
0.0
1.0
2.0
3.0
4.0
5.0
0
50
100
150
200
250
1 2 3 4
T.H
.D. (
% )
VO
UT
( mVr
ms
)
RD ( kΩ )
VOUT, T.H.D. vs. RD
VOUT
T.H.D.
DET OUT
RD 82p IFT 10.7MHz IF
Transformer
0.01u
12
NJM14570
Ver.2017-03-29 - 8 -
Ambient Temperature Characteristics Ta = 25°C, V+ = 3V, IF IN = 10.7MHz / - 30dBm, fdev = ± 50kHz, fmod = 1kHz, unless otherwise noted
0.0
1.0
2.0
3.0
4.0
5.0
0
20
40
60
80
100
120
140
160
180
200
-40 -20 0 20 40 60 80 100
T.H
.D. (
% ),
Iccq
( m
A )
VO
UT
( mV
rms
)
Temperature Ta ( °C )
VOUT, T.H.D., Iccq vs. Temperature
VOUT
T.H.D.
Iccq ( No Signal )
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
-40 -20 0 20 40 60 80 100
RS
SI O
utpu
t Vol
tage
VR
SS
I( V
)
Temperature Ta ( °C )
RSSI Output Voltage vs. Temperatureand IF Input Level
-30dBm
-60dBm
Vin = 0dBm
-100dBm
No Modulation
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
-120 -100 -80 -60 -40 -20 0 20
RS
SI O
utpu
t Vol
tage
VR
SS
I( V
)
IF Input Level Vin ( dBm )
RSSI Output Voltage vs. IF Input Leveland Ambient Temperature
-40°C
+25°C
+85°C
No Modulation
-100
-90
-80
-70
-60
-50
30
40
50
60
70
80
-40 -20 0 20 40 60 80 100
-3dB
Lim
iting
Sen
sitiv
ity ,1
2dB
SIN
AD
( dB
m )
S/N
( dB
)Temperature Ta ( °C )
S/N, -3dB Limiting Sensitivity, 12dB SINAD vs. Temperature
-3dB Limiting Sensitivity
12dB SINAD
S/N
NJM14570
Ver.2017-03-29 - 9 -
RSSI Output Transient Response (IF Input ON/ OFF) Ta = 25°C, V+ = 3V, IF IN = 10.7MHz, No Modulation, unless otherwise noted
RSSI OUT
C4
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
RSS
I Out
put V
olta
ge V
RS
SI( V
)
SG G
ATE
PU
LSE
( V )
Time ( msec )
Fall( C = 0.01uF )
SG GATE PULSE
VRSSIVin = - 30dBm
Vin = - 60dBmVRSSI
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
-20 0 20 40 60 80 100 120 140
RSS
I Out
put V
olta
ge V
RSS
I( V
)
SG G
ATE
PULS
E ( V
)
Time ( usec )
Rise( C = 100pF )
SG GATE PULSE
VRSSIVin = - 30dBm
VRSSIVin = - 60dBm
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
-20 0 20 40 60 80 100 120 140
RSS
I Out
put V
olta
ge V
RS
SI( V
)
SG
GAT
E P
ULS
E ( V
)
Time ( usec )
Rise( C = 1000pF )
SG GATE PULSE
VRSSIVin = - 30dBm
VRSSIVin = - 60dBm
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
RSS
I Out
put V
olta
ge V
RS
SI( V
)
SG G
ATE
PU
LSE
( V )
Time ( msec )
Rise( C = 0.01uF )
SG GATE PULSE
VRSSIVin = - 30dBm
VRSSIVin = - 60dBm
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
-20 0 20 40 60 80 100 120 140
RSS
I Out
put V
olta
ge V
RS
SI( V
)
SG
GAT
E P
ULS
E ( V
)
Time ( usec )
Fall( C = 1000pF )
SG GATE PULSE
VRSSIVin = - 30dBm
Vin = - 60dBmVRSSI
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
-20 0 20 40 60 80 100 120 140
RSS
I Out
put V
olta
ge V
RSS
I( V
)
SG G
ATE
PULS
E ( V
)
Time ( usec )
Fall( C = 100pF )
SG GATE PULSE
VRSSIVin = - 30dBm
Vin = - 60dBmVRSSI
NJM14570
Ver.2017-03-29 - 10 -
RSSI Output Transient Response (V+ ON/ OFF) Ta = 25°C, V+ = 3V, IF IN = 10.7MHz, No Modulation, unless otherwise noted
RSSI OUT
C4
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
-20 0 20 40 60 80 100 120 140
RSS
I Out
put V
olta
ge V
RSS
I( V
)
V+
( V )
Time ( usec )
Fall( C = 1000pF )
V+
VRSSIVin = - 30dBm
Vin = - 60dBmVRSSI
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
-20 0 20 40 60 80 100 120 140
RS
SI O
utpu
t Vol
tage
VR
SS
I( V
)
V+
( V )
Time ( usec )
Fall( C = 100pF )
V+
VRSSIVin = - 30dBm
Vin = - 60dBmVRSSI
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
-0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
RS
SI O
utpu
t Vol
tage
VR
SS
I( V
)
V+
( V )
Time ( msec )
Rise( C = 100pF )
V+
VRSSIVin = - 30dBm
VRSSIVin = - 60dBm
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
-0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
RSS
I Out
put V
olta
ge V
RS
SI( V
)
V+
( V )
Time ( msec )
Rise( C = 0.01uF )
V+
VRSSIVin = - 30dBm
VRSSIVin = - 60dBm
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
-0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4
RSS
I Out
put V
olta
ge V
RS
SI( V
)
V+
( V )
Time ( msec )
Fall( C = 0.01uF )
V+
VRSSIVin = - 30dBm
Vin = - 60dBmVRSSI
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
-0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
RSS
I Out
put V
olta
ge V
RSS
I( V
)
V+
( V )
Time ( msec )
Rise( C = 1000pF )
V+
VRSSIVin = - 30dBm
VRSSIVin = - 60dBm
NJM14570
Ver.2017-03-29 - 11 -
DETECTOR Output Transient Response Ta = 25°C, V+ = 3V, IF IN = 10.7MHz / - 30dBm, fdev = ± 50kHz, fmod = 1kHz, unless otherwise noted
AM Demodulation output characteristics by using the RSSI output Ta = 25°C, V+ = 3V, IF IN = 10.7MHz / - 50dBm, AM mod. = 80%, fmod = 10kHz, unless otherwise noted
AM OUT
C4
10
100
1000
1K 10K 100K 1M 10M
AM
OU
T ( m
VPP
)
AM Modulation Frequency fmod ( Hz )
AM Demodulation Voltage vs. Modulating Frequency
and Capacitance
C = 15pF
C = 1000pF10
100
1000
-120 -100 -80 -60 -40 -20 0 20
AM
OU
T ( m
VPP
)
IF Input Level Vin ( dBm )
AM Demodulation Voltage vs. IF Input Level
C = 1000pF
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
5.0
-1.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0D
ET
OU
T ( V
)
V+
( V )
Time ( msec )
Rise
V+
DET OUTVin = -30dBm ( mod. ON )
No input
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
4.0
5.0
-1.0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0
DE
T O
UT
( V )
V+
( V )
Time ( msec )
Fall
V+
DET OUT
NJM14570
Ver.2017-03-29 - 12 -
Electrical characteristics by using a Fixed Inductor Ta = 25°C, V+ = 3V, IF IN = 10.7MHz / - 30dBm, fdev = ± 50kHz, fmod = 1kHz, unless otherwise noted
0.0
0.5
1.0
1.5
2.0
2.5
3.0
9.5 9.9 10.3 10.7 11.1 11.5 11.9O
utpu
t DC
Vol
tage
( V
)IF Input Frequency fin ( MHz )
S-Curve Characteristics( Output DC Voltage vs. IF Input Frequency
and Capacitance )
91pF
91+4pF
100p
No Modulation
0
4
8
12
16
20
-100
-80
-60
-40
-20
0
-120 -100 -80 -60 -40 -20 0 20
T.H
.D. (
% )
S+N
, N, A
M O
UT
( dBV
)
IF Input Level Vin ( dBm )
S+N, N, T.H.D., AM OUT vs. IF Input Level
S+N
T.H.D.
AM OUT( 30% mod.)
N
0
4
8
12
16
20
-100
-80
-60
-40
-20
0
9.5 9.9 10.3 10.7 11.1 11.5 11.9
T.H
.D. (
% )
VO
UT
, N, A
M O
UT
( dBV
)
IF Input Frequency fin ( MHz )
VOUT, T.H.D. vs. IF Input Frequency
VOUT
T.H.D.
AM OUT ( 30% mod. )
N
2
2.7kΩ
C
( 95pF )
2.2uHFixed Inductor
NLV32T-2R2J-PF
0.01uF
NJM14570
Ver.2017-03-29 - 13 -
Electrical characteristics by using a Fixed Inductor V+ = 3V, IF IN = 10.7MHz / - 30dBm, fdev = ± 50kHz, fmod = 1kHz, unless otherwise noted
0
4
8
12
16
20
-100
-80
-60
-40
-20
0
9.5 9.9 10.3 10.7 11.1 11.5 11.9
T.H
.D. (
% )
VO
UT
( dB
V )
IF Input Frequency fin ( MHz )
VOUT, T.H.D. vs. IF Input Frequency and Ambient Temperature
-40°C
+25°C
+85°C
VOUT
T.H.D.0
4
8
12
16
20
-100
-80
-60
-40
-20
0
-120 -100 -80 -60 -40 -20 0 20
T.H
.D. (
% )
S+N
, N, A
M O
UT
( dB
V )
IF Input Level Vin ( dBm )
S+N, N, T.H.D., AM OUT vs. IF Input Level and Ambient Temperature
-40°C+25°C+85°C S+N
T.H.D.
AM OUT( 30% mod.)
N
0.0
0.5
1.0
1.5
2.0
2.5
3.0
1 10 100
Out
put D
C V
olta
ge( V
)
IF Input Frequency fin ( MHz )
S-Curve Characteristics for wide band( Output DC Voltage vs. IF Input Frequency
and Ambient Temperature )
-40°C
+25°C
+85°C
Vin = - 80dBmNo Modulation
0.0
0.5
1.0
1.5
2.0
2.5
3.0
1 10 100
Out
put D
C V
olta
ge( V
)
IF Input Frequency fin ( MHz )
S-Curve Characteristics for wide band( Output DC Voltage vs. IF Input Frequency
and Ambient Temperature )
-40°C
+25°C
+85°C
Vin = - 30dBmNo Modulation
0.0
0.5
1.0
1.5
2.0
2.5
3.0
9.5 9.9 10.3 10.7 11.1 11.5 11.9
Out
put D
C V
olta
ge (
V )
IF Input Frequency fin ( MHz )
S-Curve Characteristics( Output DC Voltage vs. IF Input Frequency
and Ambient Temperature )
-40°C
+25°C
+85°C
No Modulation
NJM14570
Ver.2017-03-29 - 14 -
[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.