MC1403 View Datasheet(PDF) - ON Semiconductor
Part Name
Description
Manufacturer
MC1403 Datasheet PDF : 8 Pages
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MC1403, B
+ 5.0 V
1 MC1403 2 2.5 V 1.0 k
R1
3
Full Scale
Adjust 500 W
R2
IRef
Reference
Amplifier
Monolithic D/A
Converter
*0.1 mF
C1
1.2 k
R3
* Caution: System stability may be affected if output capacitance
* exceeds 1.0 mF. Using higher capacitance values is not
* recommended and should be carefully considered.
Figure 1. A Reference for Monolithic D/A Converters
Providing the Reference Current
for ON Semiconductor Monolithic D/A Converters
The MC1403 makes an ideal reference for many mono-
lithic D/A converters, requiring a stable current reference of
nominally 2.0 mA. This can be easily obtained from the
MC1403 with the addition of a series resistor, R1. A variable
resistor, R2, is recommended to provide means for full−
scale adjust on the D/A converter.
The resistor R3 improves temperature performance by
matching the impedance on both inputs of the D/A reference
amplifier. The capacitor decouples any noise present on the
reference line. It is essential if the D/A converter is located
any appreciable distance from the reference.
A single MC1403 reference can provide the required
current input for up to five of the monolithic D/A converters.
ELECTRICAL CHARACTERISTICS (Vin = 15 V, TA = 25°C, unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Output Voltage
(IO = 0 mA)
Temperature Coefficient of Output Voltage*
MC1403
Vout
2.475
2.5
DVO/DT
−
10
Output Voltage Change*
(Over specified temperature range)
MC1403B 0 to + 70°C
MC1403B −40 to + 85°C
DVO
−
−
−
−
Line Regulation (IO = 0 mA)
(15 V p VI p 40 V)
(4.5 V p VI p 15 V)
Load Regulation
(0 mA < IO < 10 mA)
Quiescent Current
(IO = 0 mA)
Regline
−
1.2
−
0.6
Regload
−
−
IQ
−
1.2
*Guaranteed but not tested.
Max
2.525
40
7.0
12.5
4.5
3.0
10
1.5
Unit
V
ppm/°C
mV
mV
mV
mA
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