Datasheet LM1596H, LM1496H, LM1496M Datasheet (NSC)

LM1596/LM1496 Balanced Modulator-Demodulator

LM1596/LM1496 Balanced Modulator-Demodulator

February 1995

General Description

The LM1596/LM1496 are doubled balanced modulator-de­modulators which produce an output voltage proportional to
the 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.

The LM1596 is specified for operation over the

a

125§C military temperature range. The LM1496 is speci-

fied for operation over the 0

Ctoa70§C temperature range.

§

b

55§Cto

Schematic and Connection Diagrams

Features

Y

Excellent carrier suppression

65 dB typical at 0.5 MHz
50 dB typical at 10 MHz

Y

Adjustable gain and signal handling

Y

Fully balanced inputs and outputs

Y

Low offset and drift

Y

Wide frequency response up to 100 MHz

Metal Can Package

Note: Pin 10 is connected electrically to the

case through the device substrate.

Order Number LM1496H or LM1596H

See NS Package Number H08C

Top View

TL/H/7887– 2

Numbers in parentheses show DIP connections.

TL/H/7887– 1

Dual-In-Line and Small Outline Packages

TL/H/7887– 3

Order Number LM1496M or LM1496N

See NS Package Number M14A or N14A

C

1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.

TL/H/7887

Absolute Maximum Ratings

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.

Internal Power Dissipation (Note 1) 500 mW

Applied Voltage (Note 2) 30V

Differential Input Signal (V

Differential Input Signal (V

b

Input Signal (V

V1,V

2

b

V8)

7

b

V1)

4

b

V4) 5.0V

3

g

(5aI5R0)V

g

5.0V

Bias Current (I5)12mA

Operating Temperature Range LM1596b55§Ctoa125§C

LM1496 0

Storage Temperature Range

Ctoa70§C

§

b

65§Ctoa150§C

Soldering Information

Dual-In-Line Package

#

Soldering (10 seconds) 260§C

Small Outline Package

#

Vapor Phase (60 seconds) 215§C

Infrared (15 seconds) 220§C

See AN-450 ‘‘Surface Mounting Methods and their effects
on Product Reliability’’ for other methods of soldering sur­face mount devices.

Electrical Characteristics (T

Parameter Conditions

Carrier Feedthrough V

Carrier Suppression f

Transadmittance Bandwidth R

Voltage Gain, Signal Channel V

Input Resistance, Signal Port fe5.0 MHz

Input Capacitance, Signal Port fe5.0 MHz

e

C

e

f

C

e

V

C

e

f

C

e

V

C

e

f

C

e

V

C

e

f

C

e

S

e

f

C

e

f

S

e

f

C

e

L

Carrier Input Port, V

e

f

S

Signal Input Port, V

b

V

7

e

S

b

V

7

b

V

7

b

V

7

e

25§C, unless otherwise specified, see test circuit)

A

LM1596 LM1496

Min Typ Max Min Typ Max

Units

60 mVrms sine wave 40 40 mVrms

1.0 kHz, offset adjusted
60 mVrms sine wave 140 140 mVrms

10 kHz, offset adjusted

300 mVppsquare wave 0.04 0.2 0.04 0.2 mVrms

1.0 kHz, offset adjusted
300 mVppsquare wave 20 100 20 150 mVrms

1.0 kHz, not offset adjusted

10 kHz, 300 mVrms 50 65 50 65 dB
500 kHz, 60 mVrms sine wave offset adjusted
10 kHz, 300 mVrms 50 50 dB
10 MHz, 60 mVrms sine wave offset adjusted

50X 300 300 MHz

e

60 mVrms sine wave

0.5Vdc

0.5 Vdc

0.5 Vdc

0.5 Vdc

C

e

300 mVrms sine wave 80 80 MHz

S

2.5 3.5 2.5 3.5 V/V

200 200 kX

2.0 2.0 pF

1.0 kHz, 300 mVrms sine wave

e

V

8

100 mVrms, fe1.0 kHz

e

V

8

e

V

8

e

V

8

Single Ended Output Resistance fe10 MHz 40 40 kX

Single Ended Output fe10 MHz
Capacitance

Input Bias Current (I

Input Bias Current (I

Input Offset Current (I

Input Offset Current (I

a

I4)/2 12 25 12 30 mA

1

a

I8)/2 12 25 12 30 mA

7

b

I4) 0.7 5.0 0.7 5.0 mA

1

b

I8) 0.7 5.0 5.0 5.0 mA

7

Average Temperature (b55§CkT
Coefficient of Input (0
Offset Current

Output Offset Current (I

CkT

§

A

b

I9) 1450 1460 mA

6

Average Temperature (b55§CkT
Coefficient of Output (0
Offset Current

CkT

§

A

k

a

125§C) 2.0 nA/§C

A

k

a

70§C) 2.0 nA/§C

k

a

125§C) 90 nA/§C

A

k

a

70§C) 90 nA/§C

5.0 5.0 pF

2

Electrical Characteristics (T

Parameter Conditions

Signal Port Common Mode f
Input Voltage Range

Signal Port Common Mode V
Rejection Ratio

Common Mode Quiescent
Output Voltage

Differential Output Swing
Capability

Positive Supply Current (I

e

S

b

7

a

6

e

25§C, unless otherwise specified, see test circuit) (Continued)

A

1.0 kHz

e

V

8

0.5 Vdc

LM1596 LM1496

Min Typ Max Min Typ Max

5.0 5.0 V

b

85

b

85 dB

Units

8.0 8.0 Vdc

8.0 8.0 V

Ig) 2.0 3.0 2.0 3.0 mA

p-p

p-p

Negative Supply Current (I10) 3.0 4.0 3.0 4.0 mA

Power Dissipation 33 33 mW

Note 1: LM1596 rating applies to case temperatures toa125§C; derate linearly at 6.5 mW/§C for ambient temperature above 75§C. LM1496 rating applies to case
temperatures to

Note 2: Voltage applied between pins 6-7, 8-1, 9-7, 9-8, 7-4, 7-1, 8-4, 6-8, 2-5, 3-5.

Note 3: Refer to rets1596x drawing for specifications of military LM1596H versions.

a

70§C.

Typical Performance Characteristics

Carrier Suppression vs
Carrier Input Level

Sideband Output vs
Carrier Levels

Carrier Suppression vs
Frequency

Sideband and Signal Port
Transadmittances vs
Frequency

Carrier Feedthrough vs
Frequency

Signal-Port Frequency
Response

TL/H/7887– 5

3

Typical Application and Test Circuit

Suppressed Carrier Modulator

Numbers in parentheses show DIP connections.

Note: S1is closed for ‘‘adjusted’’ measurements.

TL/H/7887– 4

SSB Product Detector

Numbers in parentheses show DIP connections.

This figure shows the LM1596 used as a single sideband (SSB) suppressed carrier demodulator (product detector). The carrier signal is applied to the carrier input
port with sufficient amplitude for switching operation. A carrier input level of 300 mVrms is optimum. The composite SSB signal is applied to the signal input port
with an amplitude of 5.0 to 500 mVrms. All output signal components except the desired demodulated audio are filtered out, so that an offset adjustment is not
required. This circuit may also be used as an AM detector by applying composite and carrier signals in the same manner as described for product detector
operation.

TL/H/7887– 6

4

Typical Applications (Continued)

Broadband Frequency Doubler

Numbers in parentheses show DIP connections.

The frequency doubler circuit shown will double low-level signals with low distortion. The value of C should be chosen for low reactance at the operating frequency.

Signal level at the carrier input must be less than 25 mV peak to maintain operation in the linear region of the switching differential amplifier. Levels to 50 mV peak
may be used with some distortion of the output waveform. If a larger input signal is available a resistive divider may be used at the carrier input, with full signal
applied to the signal input.

TL/H/7887– 7

5

6

Physical Dimensions inches (millimeters)

Metal Can Package (H)

Order Number LM1496H or LM1596H

NS Package Number H08C

Molded Small Outline Package (M)

Order Number LM1496M

NS Package Number M14A

7

Physical Dimensions inches (millimeters) (Continued)

Molded Dual-In-Line Package (N)

Order Number LM1496N

NS Package Number N14A

LM1596/LM1496 Balanced Modulator-Demodulator

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