NJM1496 DOUBLE BALANCED MODULATION / DEMODULATOR ■ GENERAL DESCRIPTION The NJM1496 is a double balanced modulator-demodulator which produces an output voltage proportional to hte product of an input (signal) voltage and a switching (carrier) signal. Typical applications include suppressed carrier modulation, amplitude modulation, synchronous detection, FM or PM detection, broadband frequency doubling and chopping.

■ PACKAGE OUTLINE

NJM1496D

■ FEATURES ● Excellent carrier suppression 65dB typical at 0.5MHz 50dB typical at 10MHz ● Adjustable gain and signal handling ● Fully balanced inputs and outputs ● High Common Mode Rejection 85dB Typ. ● Package Outline DIP14, DMP14, SSOP14 ● Bipolar Technology

NJM1496M

NJM1496V

■ APPLICATION ● Balanced Modulation ● Synchronous Detection ● FM Detection ● Phase Detection ● Sampling ■ PIN CONFIGURATION (+) Signal Input

1

14

V-

Gain Adjust

2

13

NC

Gain Adjust

3

12

(-) Output

(-) Signal Input

4

11

NC

Bias

5

10

(-) Carrier Input

(+) Output

6

9

NC

NC

7

8

(+) Carrier Input

NJM1496D NJM1496M NJM1496V

■ EQUIVALENT CIRCUIT

Vo (+) 6

Carrier - 10 Input + 8 4 Signal Input + 1 Bias 5

Vo (-) 12

2

Gain 3 Adjust

V- 14

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NJM1496 ■ ABSOLUTE MAXIMUM RATINGS

(Ta=25°C)

PARAMETER

RATINGS

UNIT

30 (Applied Pins 6-8, 12-8, 6-10, 12-10, 10-1, 8-1, 10-4, 8-4, 2-5, 3-5)

V

Carrier Input Voltage

±5 (Applied Pins 8-10)

V

Signal Input Voltage

±(5+I5･Re) (Applied Pins 1-4)

V

Applied Voltage

Input Signal

5

V

Bias Current (I5)

10

mA

(DIP14) 570 (DMP14) 300 (SSOP14) 300

mW mW mW

Power Dissipation

Operating Temperature Range

-40 to +85

°C

Storage Temperature Range

-40 to +125

°C

■ ELECTRICAL CHARACTERISTICS DC characteristics (V+=12V, V-=-8V, I5=1.0mA, RL=3.9kΩ, Re=1.0kΩ, Ta=25°C) PARAMETER Single-Ended Input Impedance Parallel Input Resistance Parallel Input Capacitance Single-Ended Output Impedance Parallel Output Resistance Parallel Output Capacitance Input Bias Current Ibs=I1+I4 / 2 Ibs=I8+I10 / 2 Input Offset Current Iios=I1 - I4 Iios=I8 - I10 Average Temperature Coefficient of Input Offset Current Output Offset Current (I6 - I12) Average Temperature Coefficient of Output Offset Current Output Voltage Operating Current (I6 + I12) I14 DC Power Dissipation

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SYMBOL

TEST CONDITION

MIN.

TYP.

MAX.

UNIT

Rip Cip

Signal Port, f =5.0MHz Signal Port, f =5.0MHz

-

200 2.0

-

kΩ pF

Rop Cop

f =10MHz f =10MHz

-

40 5.0

-

kΩ pF

Ibs Ibc

-

12 12

30 30

μA μA

Iios Iioc

-

0.7 0.7

7 7

μA μA

ΔIio

-

2.0

-

nA / °C

IOC

-

15

80

μA

ΔIOC

-

90

-

nA / °C

VO

-

8.0

-

V

ID+ IDPD

-

2.0 3.0 33

4.0 5.0 -

mA mA mW

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NJM1496 AC characteristics (V+=12V, V-=-8V, I5=1.0mA, RL=3.9kΩ, Re=1.0kΩ, Ta=25°C)

■ ELECTRICAL CHARACTERISTICS PARAMETER

SYMBOL

TEST CONDITION

Carrier Feedthrough

VC=60mVrms sine wave offset adjusted fC=1.0kHz fC=10MHz VC=300mVP-P square wave fC=1.0kHz offset adjusted offset not adjusted fS=10kHz, 300mVrms sine wave offset adjusted fC=500kHz, 60mVrms sine wave fC=10MHz, 60mVrms sine wave

VCFT VCFT

VCFT VCFT Carrier Suppression VCS VCS Transadmittance Bandwidth (RL=50Ω) Carrier Input Port Signal Input Port

VC=60mVrms sine wave fS=1.0kHz, 300mVrms sine wave VS=300mVrms sine wave │VC│=0.5Vdc VS=100mVrms, fS=1.0kHz │VC│=0.5Vdc

BW 3dB BW 3dB

Voltage Gain, Signal Channel AVS Signal Port Common Mode Input Voltage Range Signal Port Common Mode Rejection Ratio Differential Output Swing Capability

CMV ACM DVout

fS=1.0kHz fS=1.0kHz, │VC│=0.5Vdc

MIN.

TYP.

MAX.

UNIT

-

40 140

-

μVrms μVrms

-

0.04 20

0.4 200

mVrms mVrms

40 -

65 50

-

dB dB

-

300 80

-

MHz MHz

2.5

3.5

-

V/V

-

5.0 -85 8.0

-

VP-P dB VP-P

■ TEST CIRCUIT  Carrier Feedthrough  Carrier Suppression

 Differential Output Swing Capability  Signal Port Common Mode Rejection Ratio +12V DC

1k

+12V DC

1k

Re 50 2

1k

RL 3

8

Carrier Input Vc Modulation Signal Input Vs

10 150

1

NJM1496

4

3.9k 6 12

RL

Re

1k

3.9k

1k

0.5V

+Vo -Vo

Vs

2 8 10 1 4

1k

RL 3

3.9k 6

NJM1496

12

RL 3.9k

+Vo -Vo

150 10k

10k

50

50

14

5

I5 R1

50k

50

14

5 6.8k

6.8k

-8V DC

Carrier Mull -8V DC

Connect a 100uF capacitor and a 3000pF capacitor in parallel to each other, if the capacitance is not specified.

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NJM1496 ■ TYPICAL CHARACTERISTICS Carrier Suppression versus Carrier Input Level

Carrier Feedthrough versus Frequency 0

SUPPRESSION BELOW EACH FUNDAMENTAL CARRIER SIDEBAND (dB)

0

CARRIER SUPPRESSION (dB)

10 20 30

fc = 10MHz

40 50

fc = 500kHz 60 70 0

100 200 300 400 CARRIER INPUT LEVEL (mVrms)

10

20

2fc

30

40

50

fc

60

70 0.01

500

Carrier Feedthrough versus Frequency

0.1 1 10 CARRIER FREQUENCY (MHz)

100

Sideband Output versus Carrier Levels

10

CARRIER OUTPUT VOLTAGE (mVrms)

3fc

2

SIDEBAND OUTPUT (Vrms)

1.6 1

0.1

SIGNAL INPUT = 600mV

1.2

400mV 0.8

300mV 200mV 0.4

100mV 0.01 0.01

0 0.1 1 10 CARRIER FREQUENCY (MHz)

100

0

50 100 150 CARRIER LEVEL (mVrms)

200

Carrier Suppression versus Temperature 0

CARRIER SUPPRESION (dB)

10 20 30 40 50 60 70 -50

-25

0

25

50

75

100

125

AMBIENT TEMPERATURE (℃)

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NJM1496 ■ TYPICAL APPLICATIONS AM Modulator Circuit 1k

1k 0.1u

V+ (+12V DC)

1k

3.9k

3.9k

51

60mVrms Carrier Input Modulation Signal Input (300mVrms Max.)

0.1u

8 10

2

0.1u

3

AM Output

6

1

NJM1496

51

12

750 4 750

14

5

51

6.8k

50k

V- (-8V DC)

Product Detector (+12V DC Single Supply) 1k

820

1.3k 0.1u

0.1u

V+ (+12V DC)

100

3k

10k

3k

51

Carrier Input 300mVrms

0.1u

8 10

2

3

1

NJM1496

6

0.1u

SSB Input

0.005u 1k

1k

1u

AF Output

12 4 1k

0.1u

14

5 0.005u

0.005u

[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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