LM1596H [NSC]
Balanced Modulator-Demodulator; 平衡调制器，解调器
| 型号： | LM1596H |
| 厂家： | 
National Semiconductor |
| 描述： | Balanced Modulator-Demodulator |
| 文件： | 总8页 (文件大小：167K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
February 1995
LM1596/LM1496 Balanced Modulator-Demodulator
General Description
Features
Y
Excellent carrier suppression
The LM1596/LM1496 are doubled balanced modulator-de-
modulators which produce an output voltage proportional to
the product of an input (signal) voltage and a switching (car-
rier) signal. Typical applications include suppressed carrier
modulation, amplitude modulation, synchronous detection,
FM or PM detection, broadband frequency doubling and
chopping.
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
b
The LM1596 is specified for operation over the 55 C to
125 C military temperature range. The LM1496 is speci-
§
a
§
a
fied for operation over the 0 C to 70 C temperature range.
§
§
Schematic and Connection Diagrams
Metal Can Package
TL/H/7887–2
Top View
Note: Pin 10 is connected electrically to the
case through the device substrate.
Order Number LM1496H or LM1596H
See NS Package Number H08C
Dual-In-Line and Small Outline Packages
TL/H/7887–1
Numbers in parentheses show DIP connections.
TL/H/7887–3
Order Number LM1496M or LM1496N
See NS Package Number M14A or N14A
C
1995 National Semiconductor Corporation
TL/H/7887
RRD-B30M115/Printed in U. S. A.
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Soldering Information
Dual-In-Line Package
#
Soldering (10 seconds)
260 C
§
Internal Power Dissipation (Note 1)
500 mW
30V
Small Outline Package
#
Applied Voltage (Note 2)
Vapor Phase (60 seconds)
Infrared (15 seconds)
215 C
§
220 C
§
b
g
5.0V
Differential Input Signal (V
Differential Input Signal (V
V )
8
7
b
a
(5 I R )V
g
V )
1
4
5
0
See AN-450 ‘‘Surface Mounting Methods and their effects
on Product Reliability’’ for other methods of soldering sur-
face mount devices.
b
b
V )
Input Signal (V
V , V
1
5.0V
2
3
4
Bias Current (I )
5
12 mA
b
b
a
55 C to 125 C
Operating Temperature Range LM1596
LM1496
§
0 C to 70 C
§
a
§
65 C to 150 C
§
a
Storage Temperature Range
§
§
e
Electrical Characteristics (T
25 C, unless otherwise specified, see test circuit)
§
A
LM1596
LM1496
Parameter
Conditions
Units
Min Typ Max Min Typ Max
e
e
e
e
Carrier Feedthrough
V
60 mVrms sine wave
1.0 kHz, offset adjusted
60 mVrms sine wave
10 kHz, offset adjusted
40
40
mVrms
mVrms
C
C
C
C
f
C
V
140
140
f
C
e
e
V
300 mV square wave
pp
1.0 kHz, offset adjusted
0.04 0.2
20 100
0.04 0.2 mVrms
20 150 mVrms
f
C
e
e
V
300 mV square wave
pp
1.0 kHz, not offset adjusted
f
C
e
e
e
e
Carrier Suppression
f
S
f
C
f
S
f
C
10 kHz, 300 mVrms
50
65
50
50
65
50
dB
dB
500 kHz, 60 mVrms sine wave offset adjusted
10 kHz, 300 mVrms
10 MHz, 60 mVrms sine wave offset adjusted
e
Carrier Input Port, V
Transadmittance Bandwidth
R
L
50X
300
80
300
80
MHz
MHz
e
1.0 kHz, 300 mVrms sine wave
60 mVrms sine wave
C
e
Signal Input Port, V
f
S
e
300 mVrms sine wave
S
b
e
0.5Vdc
V
V
8
7
e
b
e
100 mVrms, f 1.0 kHz
Voltage Gain, Signal Channel
Input Resistance, Signal Port
Input Capacitance, Signal Port
Single Ended Output Resistance
V
V
S
2.5 3.5
200
2.5 3.5
200
V/V
e
V
8
0.5 Vdc
7
e
b
f
5.0 MHz
e
kX
V
V
8
0.5 Vdc
7
e
f
5.0 MHz
2.0
40
2.0
40
pF
kX
pF
b
e
0.5 Vdc
V
V
8
7
e
e
f
f
10 MHz
10 MHz
Single Ended Output
Capacitance
5.0
5.0
a
Input Bias Current
Input Bias Current
Input Offset Current
Input Offset Current
(I
(I
(I
(I
I )/2
4
12
12
25
25
12
12
30
30
mA
mA
mA
mA
1
a
I )/2
8
7
1
7
b
b
I )
4
0.7 5.0
0.7 5.0
2.0
0.7 5.0
5.0 5.0
I )
8
k
k
a
b
Average Temperature
Coefficient of Input
Offset Current
(
55 C
§
T
k
125 C)
§
nA/ C
§
nA/ C
§
A
k
a
(0 C
T
A
70 C)
§
2.0
§
b
Output Offset Current
(I
I )
9
14
90
50
14
90
60
mA
6
k
k
b
a
125 C)
Average Temperature
Coefficient of Output
Offset Current
(
55 C
§
T
k
nA/ C
§
nA/ C
§
§
A
k
a
(0 C
T
70 C)
§
§
A
2
e
Electrical Characteristics (T
25 C, unless otherwise specified, see test circuit) (Continued)
§
A
LM1596
Typ
LM1496
Typ
Parameter
Conditions
Units
Min
Max
Min
Max
e
1.0 kHz
Signal Port Common Mode
Input Voltage Range
f
S
5.0
5.0
V
p-p
b
e
0.5 Vdc
Signal Port Common Mode
Rejection Ratio
V
7
V
8
b
b
85
85
dB
Common Mode Quiescent
Output Voltage
8.0
8.0
Vdc
Differential Output Swing
Capability
8.0
8.0
V
p-p
a
Positive Supply Current
Negative Supply Current
Power Dissipation
(I
(I
I )
g
2.0
3.0
33
3.0
4.0
2.0
3.0
33
3.0
4.0
mA
mA
mW
6
)
10
a
Note 1: LM1596 rating applies to case temperatures to 125 C; derate linearly at 6.5 mW/ C for ambient temperature above 75 C. LM1496 rating applies to case
§
§
§
a
temperatures to 70 C.
§
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.
Typical Performance Characteristics
Carrier Suppression vs
Carrier Input Level
Carrier Suppression vs
Frequency
Carrier Feedthrough vs
Frequency
TL/H/7887–5
3
Typical Application and Test Circuit
Suppressed Carrier Modulator
ow DIP connections.
TL/H/7887–4
Note: S is closed for ‘‘adjusted’’ measurements.
1
SSB Product Detector
ections.
TL/H/7887–6
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.
4
Typical Applications (Continued)
Broadband Frequency Doubler
ow DIP connections.
TL/H/7887–7
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.
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
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and whose
failure to perform, when properly used in accordance
with instructions for use provided in the labeling, can
be reasonably expected to result in a significant injury
to the user.
2. A critical component is any component of a life
support device or system whose failure to perform can
be reasonably expected to cause the failure of the life
support device or system, or to affect its safety or
effectiveness.
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