MC1403, B
Low Voltage Reference
A precision band−gap voltage reference designed for critical
instrumentation and D/A converter applications. This unit is designed
to work with D/A converters, up to 12 bits in accuracy, or as a
reference for power supply applications.
• Output Voltage: 2.5 V 25 mV
• Input Voltage Range: 4.5 V to 40 V
• Quiescent Current: 1.2 mA Typical
• Output Current: 10 mA
• Temperature Coefficient: 10 ppm/°C Typical
• Guaranteed Temperature Drift Specification
• Equivalent to AD580
• Standard 8−Pin DIP, and 8−Pin SOIC Package
T ypical Applications
• Voltage Reference for 8 to 12 Bit D/A Converters
• Low T
• High Stability Current Reference
• Voltmeter System Reference
• Pb−Free Package is Available
Zener Replacement
C
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PRECISION LOW VOLTAGE
REFERENCE
PDIP−8
P1 SUFFIX
8
1
8
1
PIN CONNECTIONS
CASE 626
SOIC−8
D SUFFIX
CASE 751
MAXIMUM RATINGS (T
Rating
Input Voltage V
Storage Temperature T
Junction Temperature T
Operating Ambient Temperature Range
MC1403B
MC1403
Maximum ratings are those values beyond which device damage can occur.
Maximum ratings applied to the device are individual stress limit values (not
normal operating conditions) and are not valid simultaneously. If these limits are
exceeded, device functional operation is not implied, damage may occur and
reliability may be affected.
= 25°C, unless otherwise noted.)
A
Symbol Value Unit
I
stg
J
T
A
40 V
−65 to 150 °C
+175 °C
−40 to +85
0 to +70
°C
°C
V
V
GND
NC
1
in
2
out
3
4
NC8
NC
7
NC
6
NC
5
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 6 of this data sheet.
Semiconductor Components Industries, LLC, 2005
March, 2005 − Rev. 4
1 Publication Order Number:
MC1403/D
+ 5.0 V
1
MC1403
3
MC1403, B
Full Scale
2.5V
2
1.0 k
R2R1
Adjust 500
I
Ref
Reference
Amplifier
Monolithic D/A
Converter
*0.1 F
C1
1.2 k
R3
* Caution: System stability may be affected if output capacitance
* exceeds 1.0 F. 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 monolithic 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.
ELECTRICAL CHARACTERISTICS (V
= 15 V, TA = 25°C, unless otherwise noted.)
in
Characteristic
Output Voltage V
(IO = 0 mA)
Temperature Coefficient of Output Voltage* VO/T − 10 40 ppm/°C
MC1403
Output Voltage Change* V
(Over specified temperature range)
MC1403B 0 to +70°C
MC1403B −40 to +85°C
Line Regulation (IO = 0 mA) Reg
(15 V VI 40 V)
(4.5 V V
15 V)
I
Load Regulation Reg
(0 mA < IO < 10 mA)
Quiescent Current I
(IO = 0 mA)
*Guaranteed but not tested.
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.
Symbol Min Typ Max Unit
out
O
line
load
Q
2.475 2.5 2.525 V
mV
−
−
−
−
7.0
12.5
mV
−
−
1.2
0.6
4.5
3.0
− − 10 mV
− 1.2 1.5 mA
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2
MC1403, B
V
in
2.0 k2.0 k
2.37 k
1.0 k
5.61 k
2.0 k
1.73k
1.0 k2.0 k
C1
30 pF
This device contains 15 active transistors.
Figure 2. MC1403, B Schematic
32
1.5 k
1.483 k10 k
V
out
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3
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