100MHz Input Mixer and 450kHz FM/AM IF Demodulator IC: FM IF Demodulator … · 2019. 7. 31. · 100MHz INPUT MIXER A ND 450kHz FM/AM IF DEMODULATOR IC ... 40 44 - dB Demodulated

NJM2552

- 1 - Ver.2018-03-23

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 2.2V to 9.0V Low Operating Current FM: 2.5mA at V+ =2.7V, AM SW =LOW

AM and FM: 5mA at V+ =2.7V, 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

OSC(B)

AM IFIN

V+

AMDEC

FM IFOUT

AM AFOUT

AMPOUT

OSC(E)

MIXOUT

AMSW

RSSIOUT

RF AGCOUT

MIXIN

GND FM IF IN

FM AFOUT

QUADIN

AMPIN

AM AGCIN

FMDEC

16 15 14 13 12 11

101 2 43 5 6 7 8

FM AMP FMDET

AMP

OSCAMP

MIXER

9

17181920

RSSI

-A

AM AMP

AMDET

AGC+ - +

-

NJM2552

- 2 - Ver.2018-03-23

ABSOLUTE MAXIMUM RATINGS (Ta=25°C) PARAMETER SYMBOL RATINGS UNIT

Supply Voltage V+ 12 V

Power Dissipation P d 300 mW

Operating Temperature T o p r -40 to +85 °C

Storage Temperature T s t g - 50 to +125 °C

RECOMMENDED OPERATING CONDITION (Ta=25°C)

PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNIT

Supply Voltage V+ 2.2 2.7 9.0 V

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.


Current Consumption I c c q 1 No signal, Circuit 1 AM SW=HIGH - 5 6.6 mA

Current Consumption I c c q 2 No signal, Circuit 1 AM SW=LOW - 2.5 3.1 mA

Mixer Conversion Gain G m i x VinMIX=40dBuV, Pin3 with ceramic filter and 1.8kΩ terminated. Circuit5

18 22 26 dB

Mixer 3 rd Order Intercept IIP3 Circuit5 - 95 - dBuV

Mixer Input Resistance R i n M - 3.6 - kΩ

Mixer Input Capacitance C i n M - 3.2 - pF

Mixer Output Resistance R o M - 1.8 - kΩ

[FM IF Section]

SINAD 12dB S I N A D Mixer input, Circuit 2 - 5 - dBuV

Demodulated Output Level 1 V o d 1 fIF input, Circuit 4 VinIF =80dBuV 55 80 105 mVrms

Total Harmonic Distortion 1 T H D 1 fIF input, Cricuit4 VinIF =80dBuV - 1 2 %

Signal to Noise Ratio 1 S / N 1 fIF input, Circuit4 VinIF=80dBuV 43 60 - dB

AM Rejection Ratio A M R fIF input, Circuit4 VinIF=80dBuV, AM=30% 30 40 - dB

NJM2552

- 3 - Ver.2018-03-23


FM IF Amp. Input Impedance R i n F M I F DC value 1.2 1.8 2.4 kΩ

RSSI Output Voltage 1 V r ss i1 fIF input, Circuit4 No input signal - 0.1 0.4 V

RSSI Output Voltage 2 V r ss i 2 fIF input, Circuit4 VinIF=60dBuV 0.8 1.1 1.4 V

RSSI Output Voltage 3 V r ss i 3 fIF input, Circuit4 VinIF=100dBuV 1.8 2.1 2.4 V

FM IF Amplifier F M I F G V fIF input, Circuit4 - 120 - dB

RF AGC Output Voltage VAGC fIF input, Circuit4 VinIF =80dBuV 0.75 1.05 1.35 V

[AM IF Section]

Demodulated Output Level 2 V o d 2 fIF input, Circutit4 VinIF =80dBuV AGC On

42 60 85 mVrms

Total Harmonic Distortion 2 T H D 2 fIF input, Cricuit4 VinIF =60dBuV AGC On

- 1 3 %

Total Harmonic Distortion 3 T H D 3 fIF input, Cricuit4 VinIF =60dBuV,AM80% AGC On

- 2 4 %

Signal to Noise Ratio 2 S / N 2 fIF input, Circutit4 VinIF =80dBuV AGC On

40 44 - dB

Demodulated Output Deviation D V o d fIF input, Cricuit4 VinIF =80 to 90dBuV AGC On

±1.5 dB

AM IF Amplifier Input Impedance R i n A M I F DC value 8 10 12 kΩ

[AMP Section]

Amplifier Gain G v 31kHz, Circuit 3 - 47 - dB

AM SW pin select mode

Control Voltage FM section AM section Other sections

0V to 0.3V(LOW) On Off On

0.8V to V+ (HIGH) On On On

NJM2552

- 4 - Ver.2018-03-23

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)

Circuit 2 (SINAD)

CERAMICFILTER

V+

LOCAL IN

C11000p

C368n

C468n

C50.1u

C60.1u

C1318p

R101.5k

CD

C120.01u

R910k

V+

C71000p

C81000p

C1610u

C21000p

V+

R251

C1710u

MIX IN

10.7MHz

10.25MHz

SINADBPF

0.1k to 30k

AM AFOUT

AMPOUT

AMSW

RSSIOUT

RF AGCOUT

AMPIN

AM AGCIN

FM AFOUT

16 15 14 13 12 11

101 2 43 5 6 7 8

FM AMP FMDET

AMP

OSCAMP

MIXER

9

17181920

RSSI

-A

AM AMP

AMDET

AGC+ - +

-

R4270k

V+

LOCAL IN

C368n

C468n

C50.1u

C60.1u

R101.5k

R4270k

V+

C71000p

C81000p

C1610u

C1510u

C140.1u

V+

Iccq1Iccq2

AM SW

MIX INAM AF

OUTAMPOUT

RSSIOUT

RF AGCOUT

FM AFOUT

AMPIN

AM AGCIN

C11000p

16 15 14 13 12 11

101 2 43 5 6 7 8

FM AMP FMDET

AMP

OSCAMP

MIXER

9

17181920

RSSI

-A

AM AMP

AMDET

AGC+ - +

-

NJM2552

- 5 - Ver.2018-03-23

Circuit 3 (Gv)

Circuit 4 (Vod1/2, THD1/2/3, S/N1/2, AMR, Vrssi1/2/3, FMIFGV, VAGC, DVod )

V+

LOCAL IN

C368n

C468n

C50.1u

C60.1u

C1318p

R101.5k

C120.01u

R910k

R88.2k

C110.01u

V+

C71000p

C81000p

R320k

C1610u

V+

C1710u

MIX IN

51

Vod1THD1S/N1AMR

Vod2 DVodTHD2 S/N2THD3

450kHz

CD

FMIFGV

VAGC Vrssi

BPF

0.1k to 30k

AM AFOUT

AMPOUT

RSSIOUT

RF AGCOUT

FM AFOUT

AMPIN

AM AGCIN

C11000p

16 15 14 13 12 11

101 2 43 5 6 7 8

FM AMP FMDET

AMP

OSCAMP

MIXER

9

17181920

RSSI

-A

AM AMP

AMDET

AGC+ - +

-

LOCAL IN

C101u

R51kR4

270k

C91u

V+

MIX IN

FM AFOUT

Gv

31kHzV+

AM AFOUT

AMPOUT

AMSW

RSSIOUT

RF AGCOUT

AMPIN

AM AGCIN

C11000p

16 15 14 13 12 11

101 2 43 5 6 7 8

FM AMP FMDET

AMP

OSCAMP

MIXER

9

17181920

RSSI

-A

AM AMP

AMDET

AGC+ - +

-

NJM2552

- 6 - Ver.2018-03-23

Circuit 5 (Gmix)

CERAMICFILTER

LOCAL IN

C11000p

V+

C21000p

V+

R251

MIX IN10.7MHz

10.25MHz1.8k

Gmix

AM AFOUT

AMPOUT

AMSW

RSSIOUT

RF AGCOUT

FM AFOUT

AMPIN

AM AGCIN

16 15 14 13 12 11

101 2 43 5 6 7 8

FM AMP FMDET

AMP

OSCAMP

MIXER

9

17181920

RSSI

-A

AM AMP

AMDET

AGC+ - +

-

NJM2552

- 7 - Ver.2018-03-23

TERMINAL FUNCTION (Ta=25°C , V+=2.7V , circuit 1) Pin No. SYMBOL EQUIVARENT CIRCUIT VOLTAGE FUNCTION

1 OSC (B)

2.66V

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.

2 OSC (E) 1.95V

3 MIX OUT

1.75V

Mixer Output An external 450kHz ceramic filter is connected. The typical output impedance is 1.8kΩ.

4 GND - -- Ground

5 AM IF IN

1.35V

AM IF Input This is an AM IF signal input to AGC amplifier. The typical input impedance is 10kΩ.

6 AM DEC 1.35V

AM IF Decoupling This is an AM IF decoupling terminal for AGC amplifier. An external decoupling capacitor is connected to enhance stability.

7 FM IF IN

2.66V

IF Limiter Amplifier Input This is an input to the IF amplifier after passing through 450kHz ceramic filter. The typical input impedance is 1.8kΩ.

8 FM DEC 2.66V

IF Decoupling An external decoupling capacitor is connected to enhance stability.

1

2

22k

2k

170u

V+

GND

200k

1.4k

135u

320p

V+

GND

10k

1.24V

6

25u

5

V+

GND

8

7

51k

0.9k 0.9k

80u

2k

V+

GND

NJM2552

- 8 - Ver.2018-03-23

Pin No. SYMBOL EQUIVARENT CIRCUIT VOLTAGE FUNCTION

9 FM IF OUT

1.80V

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.

10 QUAD IN

2.70V

Quadrature Detector Input An external phase - shifting coil or ceramic discriminator is connected.

11 FM AF OUT

0.96V

FM Demodulated Signal Output An external 3rd order multiple feed -back filter (RC filter) is connected.

12 AMP IN

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.

13 AMP OUT 0.71V

Output of Amplifier for Low Pass Filter

95u

9

V+

GND

20u

400

40010

V+

GND

95u

11

100k

10p

V+

GND

7.3k

1213

20u

V+

GND

NJM2552

- 9 - Ver.2018-03-23


14 AM AF OUT

1.46V

AM Demodulated Signal Output An external RC filter may be connected to reduce undesired signal.

15 AM SW

--

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.

16 RSSI OUT

0.17V

Received Signal Strength Indicator Output Pin 16 outputs DC level proportional to the log of input signal level to pin7.

17 RF AGC OUT

0.08V

Output of RF AGC circuit Pin 17 outputs DC voltage to control the gain of external RF amplifier.

100u

14

V+

GND

1550k

GND

55k

16

2k 2k 2k 2k

V+

GND

120k

2k

17

V+

GND

NJM2552

- 10 - Ver.2018-03-23


18 AM AGC IN

1.46V

Gain Control of AGC Circuit for AM Signal Pin 18 is connected with pin 14 through the external ripple filter of R and C.

19 V+ - - Supply Voltage

20 MIX IN

0.94V

Mixer Input The mixer is designed to work up to 100MHz with the typical input impedance of RinM = 3.6kΩ and CinM = 3.2pF(at 10.7MHz).

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

25u

18

25u1.51

V+

GND

1k

3.6k

0.94

20

3.6k

25p

1k1k

50

V+

GND

NJM2552

- 11 - Ver.2018-03-23

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

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=1000pF C3=C4=68nF C5=C6=C14=0.1uF C9=C10=1uF C11=C12=0.01uF C13=18pF C15=C16=C17=10uF CD : Ceramic Discriminator, 450kHz CERAMIC FILTER : CF, 450kHz

CERAMICFILTER

V+

LOCAL IN

C11000p

C368n

C468n

C50.1u

C60.1u

C1318pR101.5k

CD

C120.01u

R910k

C101u

R51kR4

270k

C91u

R88.2k

C110.01u

V+

C71000p

C81000p

R320k

C1610u

C1510u

C140.1u

C21000p

V+

R251

C1710u

MIXIN

AM AFOUT

AMPOUT

RSSIOUT

RF AGCOUT

FM AFOUT

AMPIN

AM AGCIN

16 15 14 13 12 11

101 2 43 5 6 7 8

FM AMP FMDET

AMP

OSCAMP

MIXER

9

17181920

RSSI

-A

AM AMP

AMDET

AGC+ - +

-

NJM2552

- 12 - Ver.2018-03-23

Circuit Side View Ground Side View

CF

C17 +

C15+

C16

+

C14

R1

R2

R3

R4

R5 R6

R7

R8

R9

R10

C1

C2

C3C4

C5 C6

C8

C7

C9

C11

C12

C10

C13

CDN

JM2552

RF AGC OUT

RSSI OUT

OFF AM SWON

AM AF OUT

FM AF OUT

AMPIN

AMPOUT

V+GND

RF IN(MIX IN)

LOCAL IN(OSC(B))

NJM2552

V+

LOW

HIGH

NJM2552

- 13 - Ver.2018-03-23

1617181920MIX IN RF AGC

OUTV+

from IF Amp

V+V+

RF AGC Line

RF Amplifier

2k

127k

Tr2Tr3

Tr1

RF IN

Description AM AGC Line

1. Example of external circuit

2. 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 1. Example of external circuit

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.

16 15 14 13 12 11

101 2 43 5 6 7 8

FM AMP FMDET

AMP

OSCAMP

MIXER

9

17181920

RSSI

-A

AM AMP

AMDET

AGC+-

+ -

CERAMICFILTER

R320k

C1610u

AGC IN

AM AFOUT

FM AFOUT

+

AM AGC Line

AM IF

V+

V+

V+

120k

NJM2552

- 14 - Ver.2018-03-23

TYPICAL 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. [DC Characteristics]

Current Consumptionversus Temperature

0

1

2

3

4

5

6

7

8

-50 -25 0 25 50 75 100 125

Ambient Temperature Ta(°C)

Cur

rent

Con

sum

ptio

n Iq

q(m

A)

Iccq1

Iccq2

circuit 1, no signal

Current Consumptionversus AM SW Voltage

0

1

2

3

4

5

6

7

8

0 0.5 1 1.5 2 2.5 3

AM SW Control Voltage (V)

Cur

rent

Con

sum

ptio

n Ic

cq(m

A)

Low

AM SW : High


Current Consumptionversus Supply Voltage

0

1

2

3

4

5

6

7

8

0 2 4 6 8 10 12

Supply Voltage V+(V)

Cur

rent

Con

sum

ptio

n Iq

q(m

A)

Iccq1

Iccq2


NJM2552

- 15 - Ver.2018-03-23

[Mixer Characteristics]

Mixer Conversion Gain versusFrequency and Supply Voltage

10

15

20

25

30

10 100 1000

Mixer Input Frequency fMIX(MHz)

Mix

er C

onve

rsio

n G

ain

Gm

ix(d

B)

circuit 5, VinMIX=40dBuV, VinLO=100dBuV

V+=2.2V

V+=9V

V+=2.7V

Mixer Conversion Gain versusFrequency and Temperature

10

15

20

25

30

10 100 1000

Mixer Input Frequency fMIX(MHz)

Mix

er C

onve

rsio

n G

ain

Gm

ix(d

B)

Ta=85°C

Ta=25°C

Ta=- 40°C

circuit 5 , VinMIX=40dBuV , VinLO=100dBuV

Mixer 3rd Order Intermodulation

0

20

40

60

80

100

120

0 20 40 60 80 100 120

Mixer Input Level VinMIX(dBuV)

Mix

er O

utpu

t Lev

el (d

BuV

)

Desired Products

3rd OrderIntermod.Products

IIP3

1dB Comp.Pt.

circuit 5, VinLO=100dBuV

Mixer Conversion Gain vesus Local Input Level

0

5

10

15

20

25

40 60 80 100 120

Local Input Level VinLO(dBuV)

Mix

er C

onve

rsio

n G

ain

Gm

ix(d

B)

circuit 5, VinMIX=40dBuV

Ta=85°C

Ta= 25°C

Ta=- 40°C

NJM2552

- 16 - Ver.2018-03-23

[RSSI Characteristics]

RSSI Output versus Mixer Inputand Ambient Temperature

0

0.5

1

1.5

2

2.5

3

-20 0 20 40 60 80 100 120


RSS

I Out

put V

olta

ge V

rssi

(V)

- 40°C

circuit 2 , VinLO=100dBuV

Ta=85°C, 25°C

RSSi Output versus IF Inputand Ambient Temperature

0

0.5

1

1.5

2

2.5

3

-20 0 20 40 60 80 100 120

IF Input Level VinIF(dBuV)

RSS

I Out

put V

olta

ge V

rssi

(V)

circuit 4

Ta=85°C, 25°C

- 40°C

RSSI Output versus Temperatureand IF Input Level

0

0.5

1

1.5

2

2.5

3

-50 -25 0 25 50 75 100 125


RSS

I Out

put V

olta

ge V

rssi

(V)

100dBuV

circuit 4

VinMIX=120dBuV90dBuV

80dBuV

70dBuV

60dBuV

50dBuV

40dBuV

- 20dBuV

RSSI Output versus IF Inputand Supply Voltage

0

0.5

1

1.5

2

2.5

3

-20 0 20 40 60 80 100 120


RSS

I Out

put V

olta

ge V

rssi

(V)

2.2V

V+= 9V

2.7V

circuit 4

RSSI Output versus Mixer Inputand Supply Voltage

0

0.5

1

1.5

2

2.5

3

-20 0 20 40 60 80 100 120


RSS

I Out

put V

olta

ge V

rssi

(dB

)

V+=2.2V

V+= 9V

V+=2.7V


NJM2552

- 17 - Ver.2018-03-23

[RF AGC Characteristics]

RF AGC Output versus IF Inputand Ambient Temperature

00.20.40.60.8

11.21.41.61.8

22.22.4

-20 0 20 40 60 80 100 120


RF A

GC

Out

put V

olta

ge V

AGC(

V)

Ta=85°C, 25°C, - 40°C

circuit 4

RF AGC Output versus Temperatureand IF Input Level

00.20.40.60.8

11.21.41.61.8

2

-50 -25 0 25 50 75 100 125


RF A

GC

Out

put V

olta

ge V

AGC(

V) VinMIX=120dBuV90dBuV85dBuV

80dBuV

75dBuV

70dBuV

- 20dBuV

circuit 4

RF AGC Output versus Mixer Inputand Supply Voltage

00.20.40.60.8

11.21.41.61.8

22.22.4

-20 0 20 40 60 80 100 120


RF

AG

C O

utpu

t Vol

tage

(V) V

+=9.0V

2.7V

2.2V


RF AGC Output versus IF Inputand Supply Voltage

00.20.40.60.8

11.21.41.61.8

22.22.4

0 20 40 60 80 100 120


RF A

GC

Out

put V

olta

ge V

AGC(

V)

V+=9.0V

2.7V

2.2V

circuit 4

RF AGC Output versus Mixer Inputand Ambient Temperature

00.20.40.60.8

11.21.41.61.8

22.22.4

-20 0 20 40 60 80 100 120


RF

AG

C O

utpu

t Vol

tage

(V)


Ta=85°C, 25°C, - 40°C

NJM2552

- 18 - Ver.2018-03-23

[FM Demodulation Characteristics]

FM Demod.Output and Distortion-IF Detuning Characteristics-

0.1

1

10

100

1000

430 440 450 460 470

IF Input Frequency fIF(kHz)

FM D

emod

ulat

ed O

utpu

tLe

vel1

Vod

1(m

Vrm

s)

0.1

1

10

100

1000

Dis

tort

ion

THD

1(%

)

Vod1

THD1

circuit 4 , VinIF=80dBuV

FM AF OUT Voltage versus Frequencyand Ambient Temperature (S-Curve)

0

0.5

1

1.5

2

2.5

420 430 440 450 460 470 480


FM A

F O

UT

Volta

ge(V

)

Ta=85°C

Ta= 25°C

Ta=- 40°C


FM AF OUT Voltage versus Frequencyand Supply Voltage (S-Curve)

0

0.5

1

1.5

2

2.5

420 430 440 450 460 470 480


FM A

F O

UT

Volta

ge(V

)

V+=9.0V

V+=2.7V2.2V


FM Demod. Output versusFM Modulation Frequency

020406080

100120140160180200

0.1 1 10 100

FM Modulation Frequency fmod(kHz)

FM D

emod

ulat

ed O

utpu

tLe

vel1

Vod

1(m

Vrm

s)

circuit 4, VinIF=80dBuV

FM : S+N, N, AMR, SINAD, THD1versus Mixer Input Level

-70

-60

-50

-40

-30

-20

-10

0

10

-20 0 20 40 60 80 100 120


S+N

, N, A

MR

(dB

)

0

10

20

30

40

50

60

70

80

SIN

AD

(dB

), TH

D1(

%)

S+N

SINAD

AMR

NTHD1


FM : S+N, N, AMR, SINAD, THD1versus IF Input Level

-70

-60

-50

-40

-30

-20

-10

0

10

-20 0 20 40 60 80 100 120


S+N

, N, A

MR

(dB

)

0

10

20

30

40

50

60

70

80

SIN

AD

(dB

), TH

D1(

%)

S+N

SINAD

AMR

N

THD1

circuit4

NJM2552

- 19 - Ver.2018-03-23

[AM Demodulation Characteristics]

AM30% : S+N, N versusIF Input Level

-70

-60

-50

-40

-30

-20

-10

0

10

-20 0 20 40 60 80 100 120


S+N

, N (d

B)

S+N

N

circuit4 , AM=30%

AM30%: Demodulated Output Levelversus Ambient Temperature

40

45

50

55

60

65

70

75

80

85

-50 -25 0 25 50 75 100 125


AM

Dem

odul

ated

Out

put

Leve

l Vod

2(m

Vrm

s)

circuit4, VinIF=80dBuV, AM=30%

AM30% : Demod. Output and Distortionversus IF Input Level

0.1

1

10

100

1000

-20 0 20 40 60 80 100 120

IF Input Level VinIF(dBuV)AM

Dem

odul

ated

Out

put

Leve

l Vod

2(m

Vrm

s)

0.1

1

10

100

1000

Dis

tort

ion

THD

2(%

)Vod2

THD2

circuit4, AM=30%

AM30% : S+N, N versusMixer Input Level

-70

-60

-50

-40

-30

-20

-10

0

10

-20 0 20 40 60 80 100 120


S+N

, N (d

B)

S+N

N

circuit 2 , VinLO=100dBuV , AM=30%

AM30%: Demodulated Output Levelversus Supply Voltage

40

45

50

55

60

65

70

75

80

85

2 4 6 8 10 12

Supply Voltage V+(V)

AM

Dem

odul

ated

Out

put

Leve

l Vod

2(m

Vrm

s)

circuit 4 , VinIF=80dBuV , AM=30%

AM30% : Demod. Output and Distortionversus Mixer Input Level

0.1

1

10

100

1000

-20 0 20 40 60 80 100 120


AM D

emod

ulat

ed O

utpu

tLe

vel V

od2(

mVr

ms)

0.1

1

10

100

1000

Dis

tort

ion

THD

2(%

)Vod2

THD2


NJM2552

- 20 - Ver.2018-03-23

AM80% : Demod. Output and Distortionversus Mixer Input Level

0.1

1

10

100

1000

-20 0 20 40 60 80 100 120


AM

Dem

odul

ated

Out

put

Leve

l Vod

2(m

Vrm

s)

0.1

1

10

100

1000

Dis

tort

ion

THD

3(%

)

Vod2

THD3


AM Demodulated Output versusIF Input Frequency

0102030405060708090

100

0.1 1 10 100

IF Input Frequency fIF(MHz)

AM

Dem

odul

ated

Out

put

Leve

l Vod

2(m

Vrm

s)

circuit4, VinIF=80dBuV, AM=30%

fif=450kHz

AM80% : Demod. Output and Distortionversus IF Input Level

0.1

1

10

100

1000

-20 0 20 40 60 80 100 120


AM D

emod

ulat

ed O

utpu

tLe

vel V

od2(

mVr

ms)

0.1

1

10

100

1000

Dis

tort

ion

THD

3(%

)

Vod2

THD3

circuit4, AM=80%

AM80% : S+N, N versusIF Input Level

-70

-60

-50

-40

-30

-20

-10

0

10

-20 0 20 40 60 80 100 120


S+N

, N (d

B)

S+N

N

circui4 , AM=80%

AM Demodulated Output versusAM Modulation Frequency

0102030405060708090

100

0.1 1 10 100

AM Modulation Frequency fmod(kHz)

AM

Dem

odul

ated

Out

put

Leve

l Vod

2(m

Vrm

s)

circuit4(BPF less), VinIF=80dBuV, AM=30%

AM80% : S+N, N versusMixer Input Level

-70

-60

-50

-40

-30

-20

-10

0

10

-20 0 20 40 60 80 100 120


S+N

, N (d

B)

circuit 2 , VinLO=100dBuV, AM=80%

S+N

N

NJM2552

- 21 - Ver.2018-03-23

[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.

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