REF03

Manufacturer Part NumberREF03
Description2.5v Precision Voltage Reference
ManufacturerAnalog Devices, Inc.
REF03 datasheet
 
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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
C1
R6
R3
R4
R5
Q2
Q1
R1
R2
Rev. G
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
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.
R7
R14
Q14
Q13
Q8
Q7
Q9
Q12
Q11
Q17
Q10
Q6
Q5
R13
Q4
Q3
≈ 1.23V
Q20
R10
Figure 2. Simplified Schematic
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2.5 V Precision
Voltage Reference
PIN CONFIGURATION
NC
NC
1
8
REF03
V
NC
2
7
IN
TOP VIEW
V
V
3
6
TEMP
OUT
(Not to Scale)
GND
TRIM
4
5
NOTES
1. NC = NO CONNECT. DO NOT CONNECT ANYTHING
ON THESE PINS. SOME OF THEM ARE RESERVED
FOR FACTORY TESTING PURPOSES.
2. TRIM PIN AND V
PIN SHOULD BE LEFT
TEMP
FLOATING IF THEY ARE NOT BEING USED.
Figure 1. 8-Lead PDIP (P-Suffix),
8-Lead SOIC (S-Suffix)
INPUT
2
Q15
R15
Q18
Q16
Q19
Q21
OUTPUT
6
R12
16.7kΩ
R9
50kΩ
TRIM
5
R11
2kΩ
GROUND
4
©2007 Analog Devices, Inc. All rights reserved.
REF03
www.analog.com

REF03 Summary of contents

  • Page 1

    ... 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 with a current drain and good temperature stability is achieved using an improved band gap design ...

  • Page 2

    ... 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 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— ...

  • Page 3

    ... V 0.2 0 ppm/° ppm/V 0.002 0.005 %/V 60 100 ppm/mA 0.006 0.010 %/ −0.3 −0 1.0 1 μs 6 μV p-p ±6 ± 620 OUT OUT REF03 5 10kΩ TRIM GND 4 Figure 4. Output Voltage Trim Method REF03 ...

  • Page 4

    ... Table 2. Parameter Input Voltage Output Short-Circuit Duration Operating Temperature Range REF03G (P-Suffix, S-Suffix) Storage Temperature Range Junction Temperature Range Lead Temperature (Soldering, 10 sec) Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only ...

  • Page 5

    ... TEMPERATURE (°C) Figure 8. Maximum Load Current vs. Temperature 1 15V IN 1.1 1.0 0.9 0.8 –40 – TEMPERATURE (°C) Figure 9. Quiescent Current vs. Temperature 100 1k 10k 100k FREQUENCY (Hz) Figure 10. Line Regulation vs. Frequency REF03 80 100 80 100 15V 25° 100 320 1000 3200 10000 32000 1M ...

  • Page 6

    ... REF03 1 15V IN 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 –40 – TEMPERATURE (°C) Figure 11. Normalized Load Regulation (∆I L 1000 V = 15V 25°C A 100 100 1k 10k FREQUENCY (Hz) Figure 12. Wideband Output Noise vs. Bandwidth (0 Frequency Indicated 100 = 10 mA) vs. Temperature 100k 1M Figure 14. Typical Distribution of Output Voltage Temperature Coefficient Rev ...

  • Page 7

    ... GENERATING A −2.5 V REFERENCE Often, there is a requirement for a negative reference voltage. The simplest method of generating a −2.5 V reference with the REF03 is to connect an op amp in a gain of −1 to the output, as shown in Figure 17. This provides both positive and negative 2.5 V references. Figure 18 shows another method of obtaining ...

  • Page 8

    ... BOOST TRANSISTOR PROVIDES HIGH OUTPUT CURRENT When applications require more than 10 mA current delivery, an external boost transistor may be added to the REF03 to pass the required current without dissipating excessive power within the IC. The maximum current output to the system is bounded only by the capabilities of the boost transistor. Figure 19 shows this technique, with and without current limiting ...

  • Page 9

    ... MIN 0.070 (1.78) 0.060 (1.52) 0.045 (1.14) COMPLIANT TO JEDEC STANDARDS MS-001 Figure 22. 8-Lead Plastic Dual In-Line Package [PDIP] (N-8) P-Suffix Dimensions shown in inches and (millimeters) Rev Page 0.50 (0.0196) 45° 0.25 (0.0099) 1.27 (0.0500) 0.40 (0.0157) 0.325 (8.26) 0.310 (7.87) 0.300 (7.62) 0.195 (4.95) 0.130 (3.30) 0.115 (2.92) 0.014 (0.36) 0.010 (0.25) 0.008 (0.20) 0.430 (10.92) MAX REF03 ...

  • Page 10

    ... REF03 ORDERING GUIDE Part Number Initial Accuracy (%) REF03GP 0.2 1 REF03GPZ 0.2 REF03GS 0.2 REF03GS-REEL 0.2 REF03GS-REEL7 0.2 1 REF03GSZ 0.2 1 REF03GSZ-REEL 0.2 1 REF03GSZ-REEL7 0 RoHS Compliant Part. Temperature Coefficient Temperature Range 10 −40°C to +85°C 10 −40°C to +85°C 10 −40°C to +85°C 10 −40°C to +85°C 10 −40°C to +85°C 10 − ...

  • Page 11

    ... NOTES Rev Page REF03 ...

  • Page 12

    ... REF03 NOTES ©2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C00372-0-6/07(G) Rev Page ...