Semiconductor Components Industries, LLC, 2004
January, 2004 − Rev. 3 1Publication Order Number:
MC1403/D
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
•Pb−Free Package is Available
MAXIMUM RATINGS (TA = 25°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
PRECISION LOW VOLTAGE
REFERENCE
PDIP−8
P1 SUFFIX
CASE 626
SOIC−8
D SUFFIX
CASE 751
NC
NC
NC
NC8
1
3
Vout
GND
4
2
NC
7
Vin
6
5
81
81
PIN CONNECTIONS
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See detailed ordering and shipping information in the package
dimensions section on page 6 of this data sheet.
ORDERING INFORMATION
MC1403, B
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2
Figure 1. A Reference for Monolithic D/A Converters
* 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.
MC1403 1.0 k
3
2
1
+ 5.0 V
1.2 k
R3
IRef
Full Scale
Adjust 500
Monolithic D/A
Converter
*0.1 F
C1
R2R1 Reference
Amplifier
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.
2.5V
ELECTRICAL CHARACTERISTICS (Vin = 15 V, TA = 25°C, unless otherwise noted.)
Characteristic Symbol Min Typ Max Unit
Output Voltage Vout 2.475 2.5 2.525 V
(IO = 0 mA)
Temperature Coefficient of Output Voltage* VO/T − 10 40 ppm/°C
MC1403
Output Voltage Change* VOmV
(Over specified temperature range)
MC1403B0 to +70°C
MC1403B −40 to +85°C−
−−
−7.0
12.5
Line Regulation (IO = 0 mA) Regline mV
(15 V VI 40 V)
(4.5 V VI 15 V) −
−1.2
0.6 4.5
3.0
Load Regulation Regload − − 10 mV
(0 mA < IO < 10 mA)
Quiescent Current IQ− 1.2 1.5 mA
(IO = 0 mA)
*Guaranteed but not tested.
MC1403, B
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Figure 2. MC1403, B Schematic
1.73k
1.5 k
Vout
32
1.483 k10 k
Vin
2.0 k2.0 k
30 pF
C1
2.37 k
1.0 k
5.61 k
2.0 k 1.0 k2.0 k
This device contains 15 active transistors.
MC1403, B
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4
V , CHANGE IN V
out (mV)∆out
V , CHANGE IN Vout (mV)∆out
−10
−12
TA, TEMPERATURE (°C)
4.0
2.0
0
−2.0
−4.0
−6.0
−8.0
TA, TEMPERATURE (°C)
−12
−10
−8.0
−6.0
−4.0
−2.0
0
−14
Figure 3. Typical Change in Vout versus Vin
(Normalized to Vin = 15 V @ TC = 25°C) Figure 4. Change in Output Voltage
versus Load Current
(Normalized to Vout @ Vin = 15 V, Iout = 0 mA)
Vin, INPUT VOLTAGE (V)
2.0
1.0
0
−1.0
−2.0
−3.0
−4.0
−5.0
−6.0
01020304050
V , CHANGE IN Vout (mV)∆out
25°C
0°C
75°C
Iout, OUTPUT CURRENT (mA)
∆Vout , CHANGE IN OUTPUT VOLTAGE (mV)
10
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
00 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10
75°C
0°C
25°C
Figure 5. Quiescent Current versus Temperature
(Vin = 15 V, Iout = 0 mA)
I1, QUIESCENT CURRENT (mA)
TA, TEMPERATURE (°C)
0
1.25
1.20
1.15
1.10
1.05
1.00
0.95
0.90
806040200−40 −20
Figure 6. Change in Vout versus Temperature
(Normalized to Vout @ Vin = 15 V)
Figure 7. Change in Vout versus Temperature
(Normalized to TA = 25°C, Vin = 15 V, Iout = 0 mA)
8570503010−10−30 806040200−40 −20 8570503010−10−30
Vin = 5.0 V
Vin = 15 V
Iout = 2 mA
806040200−40 −20 85
70503010−10−30
IO = 0 mA = 2.0 mA
= 5.0 mA
= 8.0 mA
MC1403, B
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3−1/2−Digit Voltmeter − Common Anode
Displays, Flashing Overrange
An example of a 3−1/2−digit voltmeter using the
MC14433 is shown in the circuit diagram of Figure 8. The
reference voltage for the system uses an MC1403 2.5 V
reference IC. The full scale potentiometer can calibrate for
a full scale of 199.9 mV or 1.999 V. When switching from
2.0 V to 200 mV operation, RI is also changed, as shown on
the diagram.
When using RC equal to 300 k, the clock frequency for
the system is about 66 kHz. The resulting conversion time
is approximately 250 ms.
When the input is overrange, the display flashes on and
off. The flashing rate is one−half the conversion rate. This
is done by dividing the EOC pulse rate by 2 with 1/2
MC14013B flip−flop and blanking the display using the
blanking input of the MC14543B.
The display uses an LED display with common anode
digit lines driven with an MC14543B decoder and an
MC1413 LED driver. The MC1413 contains 7 Darlington
transistor drivers and resistors to drive the segments of the
display. The digit drive is provided by four MPS−A12
Darlington transistors operating in an emitter−follower
configuration. The MC14543B, MC14013B and LED
displays are referenced to VEE via Pin 13 of the MC14433.
This places the full power supply voltage across the display.
The current for the display may be adjusted by the value of
the segment resistors shown as 150 in Figure 8.
Figure 8. 3−1/2−Digit Voltmeter
Common
Anode
LED
Display
* RI = 470 k for 2.0 V Range
RI = 27 k for 200 mV Range
** Mylar Capacitor
0.1F
3
21
+5.0 V
0.1FRC
300 k
VX
RI *
20 k
−5.0 V
0.1 F
+5.0 V
0.1 F
0.1 F
Plus Sign
50 F
Minus Sign
Segment Resistors
150 (7)
MPS−A12
+5.0 V
MC14013B
51 k
MC14433
0.1 F
CQ
Q
R
S
D
14
DS1 6
710 −5.0 V
−5.0 V
C
86
161
19
5.0 V
DS
R
Q
Q
+5.0 V
MPS−A12
(4)
7
MC1403
200
110
0.1 F **
DS2 DS3
DS4
1
2
8
13
1211
9
4
3
5
10
1
2
3
4
5
9
5
3
2
4
16
15
14
13
11
12
7
15
14
13
6
11
10
14
16171815
8
7
6
5
4
13
12
9
22
23
21
24
1
12
20
21011
3
bacdegf
MC14543B
MC1413
+5.0 V +5.0 V
−5.0 V
−5.0 V −5.0 V
−5.0 V
−5.0 V
MC1403, B
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6
ORDERING INFORMATION
Device Package Operating Temperature Range Shipping†
MC1403D SOIC−8 TA = 0° to +70°C98 Units/Rail
MC1403DR2 2500 Tape/Reel
MC1403P1 PDIP−8 1000 Units/Rail
MC1403P1G PDIP−8
(Pb−Free) 1000 Units/Tubes
MC1403BD SOIC−8 TA = −40° to +85°C98 Units/Rail
MC1403BDR2 2500 Tape/Reel
MC1403BP1 PDIP−8−8 1000 Units/Rail
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
MC1403, B
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PACKAGE DIMENSIONS
PDIP−8
P1 SUFFIX
CASE 626−05
ISSUE L
NOTES:
1. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
2. PACKAGE CONTOUR OPTIONAL (ROUND OR
SQUARE CORNERS).
3. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
14
58
F
NOTE 2 −A−
−B−
−T−
SEATING
PLANE
H
J
GDK
N
C
L
M
M
A
M
0.13 (0.005) B M
T
DIM MIN MAX MIN MAX
INCHESMILLIMETERS
A9.40 10.16 0.370 0.400
B6.10 6.60 0.240 0.260
C3.94 4.45 0.155 0.175
D0.38 0.51 0.015 0.020
F1.02 1.78 0.040 0.070
G2.54 BSC 0.100 BSC
H0.76 1.27 0.030 0.050
J0.20 0.30 0.008 0.012
K2.92 3.43 0.115 0.135
L7.62 BSC 0.300 BSC
M−−− 10 −−− 10
N0.76 1.01 0.030 0.040

MC1403, B
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PACKAGE DIMENSIONS
SOIC−8
D SUFFIX
CASE 751−07
ISSUE AA
SEATING
PLANE
1
4
58
N
J
X 45
K
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
6. 751−01 THRU 751−06 ARE OBSOLETE. NEW
STANDARD IS 751−07.
A
BS
D
H
C
0.10 (0.004)
DIM
AMIN MAX MIN MAX
INCHES
4.80 5.00 0.189 0.197
MILLIMETERS
B3.80 4.00 0.150 0.157
C1.35 1.75 0.053 0.069
D0.33 0.51 0.013 0.020
G1.27 BSC 0.050 BSC
H0.10 0.25 0.004 0.010
J0.19 0.25 0.007 0.010
K0.40 1.27 0.016 0.050
M0 8 0 8
N0.25 0.50 0.010 0.020
S5.80 6.20 0.228 0.244
−X−
−Y−
G
M
Y
M
0.25 (0.010)
−Z−
Y
M
0.25 (0.010) Z SXS
M

SOIC−8
1.52
0.060
7.0
0.275
0.6
0.024 1.270
0.050
4.0
0.155
mm
inches
SCALE 6:1
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
SOLDERING FOOTPRINT*
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to any products herein. SCILLC makes no warranty , representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
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PUBLICATION ORDERING INFORMATION
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2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051
Phone: 81−3−5773−3850
MC1403/D
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