Analog Devices REF03 f Datasheet
2.5 V Precision
FEATURES
2.5 voltage output, ±0.6% max
Wide Input voltage range, 4.5 V to 33 V
Supply current 1.4 mA max
Output voltage tempco, 50 ppm/°C max
Line regulation, 50 ppm/V max
Load regulation, 100 ppm/mA max
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 mini DIPs and surface-mount small outline plastic
packages. For improved performance or −40°C to +125°C
operation, see the ADR03 data sheet.
Voltage Reference
PIN CONFIGURATION
1
NC
REF03
V
2
IN
V
TEMP
GND
NC = NO CONNECT. DO NOT CONNECT ANYTHING
ON THESE PINS. SOME OF THEM ARE RESERVED
FOR FACTORY TESTING PURPOSES.
TOP VIEW
3
(Not to Scale)
4
Figure 1. 8-Lead PDIP (P-Suffix),
8-Lead SOIC (S-Suffix)
NC
8
NC
7
V
6
OUT
TRIM
5
REF03
00372-F-001
INPUT
2
Q19
6
R12 = 16.7kΩ
5
4
OUTPUT
TRIM
GROUND
00372-F-002
R3
R1
R2
Q1
R5
C1
R4
Q2
R6
R8
Q8
Q4
Q6
Q20
R10
Q5
R7
Q7
Q9
Q3
Q14
Q10
R14
Q12
Q11
≈
1.23V
Figure 2. Simplified Schematic
Q17
Q13
Q15
R15
Q18
Q16
Q21
R13
R9 = 50kΩ
R11 = 2kΩ
Rev. F
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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
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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.
www.analog.com
REF03
TABLE OF CONTENTS
Electrical Specifications................................................................... 3
Generating a −2.5 V Reference....................................................6
Absolute Maximum Ratings............................................................ 4
ESD Caution.................................................................................. 4
Typical Performance Characteristics ............................................. 5
Applications....................................................................................... 6
Generating an Adjustable Bipolar Voltage Reference.............. 6
Boost Transistor Provides High Output Current......................6
CMOS DAC Reference.................................................................7
Outline Dimensions ..........................................................................8
Ordering Guide .............................................................................8
REVISION HISTORY
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
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
Change to FEATURES.....................................................................................1
Change to GENERAL DESCRIPTION..........................................................1
Deleted WAFER TEST LIMITS.......................................................................2
Changes to ELECTRICAL SPECIFICATIONS.............................................2
Changes to ORDERING GUIDE....................................................................3
Added OUTLINE DIMENSIONS ...................................................................7
Revision 0: Initial Version
Rev. F | Page 2 of 8
REF03
()(
)
ELECTRICAL SPECIFICATIONS
@ VIN = 15 V, −40°C ≤ TA ≤ +85°C, unless otherwise noted.
Table 1.
REF03G
Parameter Symbol Conditions Min Typ Max Unit
Output Voltage V
O
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
TCV
O
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) I
Load Current (Sinking) I
Short-Circuit Output Current I
Quiescent Supply Current I
Turn-On Settling Time
2
L
S
SC
SY
t
ON
10 mA
−0.3 −0.5 mA
Output Shorted to Ground 24 mA
No Load 1.0 1.4 mA
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
TRIM
R
= 10 kΩ ±6 ±11 %
POT
Input Voltage Range 4.5 15 33 V
Temperature Voltage Output
3
V
T
620 mV
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
C40VC85V
−−
6oo
−
C1251052
()
Figure 3. Burn-In Circuit
Cppmin
/
+18V
V
IN
REF03
GND
–18V
10Ω
2
4
+
+
10µF
10µF
V+
2
V
IN
6
V
OUT
REF03
00372-F-003
GND
TRIM
4
5
10kΩ
V
OUT
Figure 4. Output Voltage Trim Method
00372-F-004
Rev. F | Page 3 of 8
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