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
MC1403, B
2.0
1.0
(mV)∆
0
out
−1.0
−2.0
25°C
0°C
75°C
−3.0
−4.0
out
V , CHANGE IN V
−5.0
−6.0
01020304050
Vin, INPUT VOLTAGE (V)
Figure 3. T ypical Change in V
versus V
out
in
(Normalized to Vin = 15 V @ TC = 25°C)
1.25
1.20
1.15
1.10
1.05
1.00
0.95
, QUIESCENT CURRENT (mA)
1
I
0.90
0
T
, TEMPERATURE (°C)
A
806040200−40 −20
Figure 5. Quiescent Current versus Temperature
(Vin = 15 V, I
= 0 mA)
out
10
9.0
8.0
7.0
6.0
5.0
4.0
75°C
3.0
2.0
, CHANGE IN OUTPUT VOLTAGE (mV)
1.0
out
V
∆
0
0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10
I
, OUTPUT CURRENT (mA)
out
0°C
25°C
Figure 4. Change in Output Voltage
versus Load Current
(Normalized to V
(mV)∆
0
out
−2.0
−4.0
−6.0
−8.0
out
V , CHANGE IN V
−10
−12
8570503010−10−30
−14
Figure 6. Change in V
(Normalized to V
@ Vin = 15 V, I
out
Vin = 15 V
Vin = 5.0 V
T
, TEMPERATURE (°C)
A
versus Temperature
out
@ Vin = 15 V)
out
= 0 mA)
out
I
out
= 2 mA
806040200−40 −20 8570503010−10−30
4.0
2.0
(mV)∆
0
out
−2.0
−4.0
−6.0
−8.0
out
V , CHANGE IN V
−10
−12
Figure 7. Change in V
(Normalized to TA = 25°C, Vin = 15 V, I
IO = 0 mA
= 8.0 mA
T
, TEMPERATURE (°C)
A
versus Temperature
out
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= 0 mA)
out
= 2.0 mA
= 5.0 mA
70503010−10−30
85
806040200−40 −20
MC1403, B
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, R
is also changed, as shown on
I
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
+5.0 V
0.1F
V
X
* R
RI = 27 k for 200 mV Range
** Mylar Capacitor
MC1403
21
3
0.1F
RI *
0.1 F **
0.1 F
= 470 k for 2.0 V Range
I
300 k
R
3
1
4
5
6
7
8
20 k
−5.0 V
+5.0 V
122021011
DS3
24
16171815
DS4
0.1 F
23
22
21
13
9
14
−5.0 V
−5.0 V −5.0 V
5
3
4
9
−5.0 V
C
MC14433
19
DS1
DS2
0.1 F
4
2
3
5
6
S
Q
D
CQ
R
S
D
Q
Q
C
R
710
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 V
via Pin 13 of the MC14433.
EE
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.
+5.0 V +5.0 V
Segment Resistors
150 (7)
10
11
12
13
14
15
16
Minus Sign
200
Plus Sign
110
Common
Anode
LED
Display
0.1 F
MPS−A12
(4)
8
5.0 V
14
MC14543B
6
1
2
8
13
1211
+5.0 V
161
9
10
11
12
13
14
15
7
MC14013B
7
6
5
4
3
2
1
−5.0 V
−5.0 V
50 F
MC1413
MPS−A12
51 k
+5.0 V
−5.0 V
bacdegf
Figure 8. 3−1/2−Digit V oltmeter
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MC1403, B
A
ORDERING INFORMATION
Device Package Operating Temperature Range Shipping
MC1403D SOIC−8 98 Units/Rail
MC1403DG SOIC−8
MC1403DR2 SOIC−8 2500 Tape/Reel
MC1403DR2G SOIC−8
MC1403P1 PDIP−8 1000 Units/Rail
MC1403P1G PDIP−8
MC1403BD SOIC−8 98 Units/Rail
MC1403BDG SOIC−8
MC1403BDR2 SOIC−8
MC1403BP1 PDIP−8−8
MC1403BP1G PDIP−8−8
†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.
(Pb−Free)
TA = 0° to +70°C
(Pb−Free)
(Pb−Free)
(Pb−Free)
TA = −40° to +85°C
(Pb−Free)
98 Units/Rail
2500 Tape/Reel
1000 Units/Tubes
98 Units/Rail
2500 Tape/Reel
1000 Units/Rail
1000 Units/Rail
†
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MC1403, B
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.
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−Y−
−Z−
MC1403, B
PACKAGE DIMENSIONS
SOIC−8
D SUFFIX
CASE 751−07
ISSUE AE
−X−
B
H
A
58
1
4
G
D
0.25 (0.010) Z
M
S
Y
0.25 (0.010)
C
SEATING
PLANE
SXS
M
0.10 (0.004)
M
Y
K
N
X 45
M
J
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.
MILLIMETERS
DIMAMIN MAX MIN MAX
4.80 5.00 0.189 0.197
B 3.80 4.00 0.150 0.157
C 1.35 1.75 0.053 0.069
D 0.33 0.51 0.013 0.020
G 1.27 BSC 0.050 BSC
H 0.10 0.25 0.004 0.010
J 0.19 0.25 0.007 0.010
K 0.40 1.27 0.016 0.050
M 0 8 0 8
N 0.25 0.50 0.010 0.020
S 5.80 6.20 0.228 0.244
INCHES
SOLDERING FOOTPRINT*
1.52
0.060
7.0
0.275
0.6
0.024
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
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
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, af
4.0
0.155
1.270
0.050
SCALE 6:1
inches
mm
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