Wide Band FM IF Demodulator: FM IF Demodulator ICs

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.

Mouser Electronics

Authorized Distributor

Click to View Pricing, Inventory, Delivery & Lifecycle Information: Nisshinbo Micro Devices:

  NJM14570RB1-TE1