2.5 V Precision
T
FEATURES
2.5 voltage output, ±0.6% maximum
Wide input voltage range: 4.5 V to 33 V
Supply current: 1.4 mA maximum
Output voltage temperature coefficient: 50 ppm/°C
maximum
Line regulation: 50 ppm/V maximum
Load regulation: 100 ppm/mA maximum
Extended industrial temperature range: −40°C to +85°C
Low cost
GENERAL DESCRIPTION
The REF03 precision voltage reference provides a stable 2.5 V
output, with minimal change for variations in supply voltage,
ambient temperature, or loading conditions. Single-supply
operation over an input voltage range of 4.5 V to 33 V with
a current drain of 1 mA and good temperature stability is
achieved using an improved band gap design. Primarily
targeted at price sensitive applications, the REF03 is available
in plastic PDIPs and surface-mount small outline plastic
packages. For improved performance or −40°C to +125°C
operation, see the
ADR03 data sheet.
R8
Q8
R7
Q7
Q14
R14
Q13
Voltage Reference
PIN CONFIGURATION
1
NC
REF03
2
V
IN
V
TEMP
GND
NOTES
1. NC = NO CONNECT. DO NOT CONNECT ANYTHING
ON THESE PINS. SOME OF THEM ARE RESERVED
FOR FACTORY TESTING PURPOSES.
2. TRIM PINAND V
FLOATING IF THEY ARE NOT BEING USED.
TOP VIEW
3
(Not to Scale)
4
PIN SHOULD BE LEFT
TEMP
Figure 1. 8-Lead PDIP (P-Suffix),
8-Lead SOIC (S-Suffix)
Q15
R15
2
8
7
6
5
INPU
NC
NC
V
OUT
TRIM
REF03
00372-001
Q9
C1
R6
R3
Q1
R1
R2
R4
Q4
R5
Q2
Q6
Q5
Q3
Q20
R10
Q10
Figure 2. Simplified Schematic
Rev. G
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
Q12
Q11
≈
Q18
Q16
Q19
Q21
1.23V
Q17
R13
R12
16.7kΩ
R11
2kΩ
R9
50kΩ
OUTPUT
6
TRIM
5
GROUND
4
00372-002
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ©2007 Analog Devices, Inc. All rights reserved.
REF03
TABLE OF CONTENTS
Features.............................................................................................. 1
General Description ......................................................................... 1
Pin Configuration............................................................................. 1
Revision History ............................................................................... 2
Electrical Specifications ................................................................... 3
Absolute Maximum Ratings............................................................ 4
ESD Caution.................................................................................. 4
Typical Performance Characteristics ............................................. 5
REVISION HISTORY
6/07—Rev. F to Rev. G
Changes to Figure 1.......................................................................... 1
Changes to Applications Section .................................................... 7
Added Figure 15................................................................................ 7
Deleted Figure 21.............................................................................. 7
Updated Outline Dimensions......................................................... 9
Changes to Ordering Guide.......................................................... 10
6/04—Data Sheet changed from Rev. E to Rev. F
Updated Formatting...........................................................Universal
Changes to Simplified Schematic................................................... 1
Changes to Electrical Specifications .............................................. 3
Changes to Ordering Guide............................................................ 8
Applications........................................................................................7
Generating an Adjustable Bipolar Voltage Reference...............7
Generating a −2.5 V Reference....................................................7
Boost Transistor Provides High Output Current......................8
CMOS DAC Reference .................................................................8
Outline Dimensions..........................................................................9
Ordering Guide .......................................................................... 10
2/04—Data Sheet changed from Rev. D to Rev. E
Changes to Simplified Schematic....................................................1
Changes to Electrical Specifications ...............................................2
Changes to Ordering Guide.............................................................3
Replaced TPC 1 .................................................................................4
8/03—Data Sheet changed from Rev. C to Rev. D
Updated format...................................................................Universal
Changes to Features ..........................................................................1
Changes to General Description .....................................................1
Replaced Wafer Test Limits..............................................................2
Changes to Electrical Specifications ...............................................2
Changes to Ordering Guide.............................................................3
Added Outline Dimensions .............................................................7
Rev. G | Page 2 of 12
REF03
V
V
ELECTRICAL SPECIFICATIONS
@ VIN = 15 V, −40°C ≤ TA ≤ +85°C, unless otherwise noted.
Table 1.
REF03G
Parameter Symbol Conditions
Min Typ Max
Output Voltage VO No load 2.485 2.500 2.515 V
Output Voltage Tolerance No load 0.2 0.6 %
Output Voltage
Temperature Coefficient
Line Regulation V
1
TCVO 10 50 ppm/°C
= 4.5 V to 33 V 20 50 ppm/V
IN
0.002 0.005 %/V
Load Regulation IL = 0 mA to 10 mA 60 100 ppm/mA
0.006 0.010 %/mA
Load Current (Sourcing) IL 10 mA
Load Current (Sinking) IS −0.3 −0.5 mA
Short-Circuit Output Current ISC Output shorted to ground 24 mA
Quiescent Supply Current ISY No load 1.0 1.4 mA
Turn-On Settling Time
2
tON To ±0.1% of final value 5 μs
Output Voltage Noise en p-p 0.1 Hz to 10 Hz 6 μV p-p
Output Adjustment Range ∆V
R
TRIM
= 10 kΩ ±6 ±11 %
POT
Input Voltage Range 4.5 15 33 V
Temperature Voltage Output
1
TCVO is measured by the endpoint method, and is equal to
()( )
()
×
2
Guaranteed by design.
3
Limit current in or out of Pin 3 to 50 nA and capacitance on Pin 3 to 30 pF.
oo
4085
CVCV
−−
6oo
−
()
125105.2
C
3
Cppm/in
VT 620 mV
+18
Unit
10Ω
2
V
IN
REF03
GND
4
–18V
+
+
10µF
10µF
00372-003
+
2
V
IN
V
REF03
TRIM
GND
4
OUT
6
5
10kΩ
V
OUT
0372-004
Figure 3. Burn-In Circuit Figure 4. Output Voltage Trim Method
Rev. G | Page 3 of 12
REF03
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted. Absolute maximum
ratings apply to both DICE and packaged parts, unless
otherwise noted.
Table 2.
Parameter Rating
Input Voltage 40 V
Output Short-Circuit Duration Indefinite
Operating Temperature Range
REF03G (P-Suffix, S-Suffix) −40°C to +85°C
Storage Temperature Range −65°C to +175°C
Junction Temperature Range −65°C to +175°C
Lead Temperature (Soldering, 10 sec) 300°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Table 3. Package Thermal Resistance
Package Type θ
1
θ
JA
JC
Unit
8-Lead PDIP (P-Suffix) 110 50 °C/W
8-Lead SOIC (S-Suffix) 160 44 °C/W
1
θJA is specified for worst-case mounting conditions, that is, θJA is specified for
the device in socket for a PDIP package. θJA is specified for the device
soldered to printed circuit board for a SOIC package.
ESD CAUTION
Rev. G | Page 4 of 12
Loading...