MC1403 Datasheet, PDF (1/8 Pages) Motorola, Inc – Low Voltage Reference

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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
Typical Applications
• Voltage Reference for 8 to 12 Bit D/A Converters
• Low TC Zener Replacement
• High Stability Current Reference
• Voltmeter System Reference
MAXIMUM RATINGS (TA = 25°C, unless otherwise noted.)
Rating
Symbol
Value
Unit
Input Voltage
Storage Temperature
Junction Temperature
Operating Ambient Temperature Range
MC1403B
MC1403
VI
40
V
Tstg
– 65 to 150
°C
TJ
+175
°C
TA
– 40 to +85
°C
0 to + 70
°C
PRECISION LOW VOLTAGE
REFERENCE
SEMICONDUCTOR
TECHNICAL DATA
8
1
8
1
P1 SUFFIX
PLASTIC PACKAGE
CASE 626
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
PIN CONNECTIONS
Vin 1
Vout 2
Gnd 3
NC 4
8 NC
7 NC
6 NC
5 NC
ORDERING INFORMATION
Device
Operating
Temperature Range Package
MC1403D
MC1403P1
MC1403BD
MC1403BP1
TA = 0° to +70°C
TA = – 40° to +85°C
SO–8
Plastic DIP
SO–8
Plastic DIP
+ 5.0 V
Figure 1. A Reference for Monolithic D/A Converters
1 _MC1403
3
2 ^{2.5 V 1.0 k}
R1
Full Scale
Adjust 500 Ω
R2
IRef
Reference
Amplifier
Monolithic D/A
Converter
*0.1 µF
C1
Providing the Reference Current
for Motorola 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.
1.2 k
R3
* Caution: System stability may be affected if output capacitance
* exceeds 1.0 µF. Using higher capacitance values is not
* recommended and should be carefully considered.
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.
MOTOROLA ANALOG IC DEVICE DATA
© Motorola, Inc. 1996
Rev 1
1