SEMICONDUCTOR
TECHNICAL DATA
PRECISION LOW VOLTAGE
REFERENCE
ORDERING INFORMATION
Order this document by MC1403/D
P1 SUFFIX
PLASTIC PACKAGE
CASE 626
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–8)
NC
NC
NC
NC8
1
3
Vout
Gnd
4
2
NC
7
Vin
6
5
81
81
Device Operating
Temperature Range Package
MC1403D
MC1403P1
MC1403BD
MC1403BP1
TA = 0° to +70°CPlastic DIP
SO–8
SO–8
Plastic DIP
TA = –40° to +85°C
PIN CONNECTIONS
1
MOTOROLA ANALOG IC DEVICE DATA
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 Coef ficient: 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 = 2 5°C, unless otherwise noted.)
Rating Symbol Value Unit
Input Voltage VI40 V
Storage Temperature Tstg –65 to 150 °C
Junction Temperature TJ+175 °C
Operating Ambient Temperature Range
MC1403B
MC1403
TA–40 to +85
0 to +70 °C
°C
Figure 1. A Reference for Monolithic D/A Converters
* Caution: System stability may be af fected if output capacitance
*exceeds 1.0 µF. Using higher capacitance values is not
*recommended and should be carefully considered.
MC1403 1.0 k
3
2
1
+5.0 V
1.2 k
R3
IRef
Full Scale
Adjust 500
Ω
Monolithic D/A
Converter
*0.1
µ
F
C1
R2R1 Reference
Amplifier
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.
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.
2.5 V
Motorola, Inc. 1996 Rev 1