MC1496D ON Semiconductor, MC1496D Datasheet - Page 5

• Manufacturer Part Number: MC1496D
• Description: Modulator / Demodulator Balanced Mod/DeMod
• Manufacturer: ON Semiconductor

Specifications of MC1496D

• Package / Case: SOIC-14
• Maximum Operating Temperature: + 70 C
• Maximum Power Dissipation: 33 mW
• Minimum Operating Temperature: 0 C
• Modulation Type: Balanced
• Mounting Style: SMD/SMT
• Supply Current: 0.005 A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Bias currents flowing into Pins 1, 4, 8 and 10 are transistor
base currents and can normally be neglected if external bias
dividers are designed to carry 1.0 mA or more.
Transadmittance Bandwidth
of the device forward transadmittance as defined by:
of the device forward transadmittance as defined by:
Coupling and Bypass Capacitors
reactance of less than 5.0 W at the carrier frequency.
Output Signal
balanced or single−ended. Figure 11 shows the output levels
of each of the two output sidebands resulting from variations
in both the carrier and modulating signal inputs with a
single−ended output connection.
Signal Input
Modulating
Carrier transadmittance bandwidth is the 3.0 dB bandwidth
Signal transadmittance bandwidth is the 3.0 dB bandwidth
Capacitors C1 and C2 (Figure 5) should be selected for a
The output signal is taken from Pins 6 and 12 either
Carrier
Input
1.0 k
Figure 5. Carrier Rejection and Suppression
g 21S +
V
V
C
S
Figure 7. Bias and Offset Currents
g 21C +
0.1 mF
1.0 k
10 k
C
2
I7
I8
I1
I4
1.0 k
v s (signal)
R1
i o (signal)
50 k
i o (each sideband)
10 k
51
Carrier Null
10
8
1
4
−8.0 Vdc
v s (signal)
51
2
V
0.1 mF
EE
R
MC1496
⎥
e
14
C1
I10
= 1.0 k
V c + 0.5 Vdc, V o + 0
51
10
5
6.8 k
3
8
1
4
−8.0 Vdc
6
12
1.0 k
2
V
⎥
MC1496
EE
14
V
I6
I9
12 Vdc
V o + 0
I10
1.0 k
−
R
V
e
CC
I5
2.0 k
3
5
6.8 k
3.9 k
12
R
6
L
12 Vdc
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TEST CIRCUITS
V
I9
CC
I6
3.9 k
R
+V
Signal Input
L
−V
Modulating
Carrier
5
o
o
Input
Negative Supply
series with V
current sources.
Signal Port Stability
oscillation may occur. In this event, an RC suppression
network should be connected directly to each input using
short leads. This will reduce the Q of the source−tuned
circuits that cause the oscillation.
insert a 1.0 kW resistor in series with the input (Pins 1, 4). In
this case input current drift may cause serious degradation
of carrier suppression.
V
V
C
S
V
Under certain values of driving source impedance,
An alternate method for low−frequency applications is to
0.1 mF
EE
10 k
NOTE: Shielding of input and output leads may be needed
Figure 8. Transconductance Bandwidth
should be dc only. The insertion of an RF choke in
Z
(Pins 1 and 4)
Signal Input
in
1.0 k
Figure 6. Input−Output Impedance
50 k
51
10 k
Carrier Null
to properly perform these tests.
0.5 V
EE
+
can enhance the stability of the internal
0.1 mF
−
51
10
8
1
4
−8.0 Vdc
2
51
MC1496
R
10
8
1
4
14
e
−8.0 Vdc
= 1.0 k
2
1.0 k
V
EE
MC1496
14
V
510
−
1.0 k
R
6.8 k
3
5
e
6
12
3
5
6.8 k
12
6
50 50
Z
2.0 k
10 pF
+V
out
−V
V
12 Vdc
CC
o
o
+V
−V
0.01
mF
o
o