2.5 V Precision
Voltage Reference
REF03
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
PIN CONFIGURATION
NC
1
V
IN 2
8
NC
V
TEMP 3
REF03
7
NC
TOP VIEW
6
V
OUT
(Not to Scale)
GND
4
5
TRIM
00372-F-001
NC = NO CONNECT. DO NOT CONNECT ANYTHING
ON THESE PINS. SOME OF THEM ARE RESERVED
FOR FACTORY TESTING PURPOSES.
Figure 1. 8-Lead PDIP (P-Suffix),
8-Lead SOIC (S-Suffix)
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.
INPUT
R8
R7
R14
2
Q15
Q8
Q7
Q14
Q13
R15
Q9
Q12
Q11
C1
R6
R3
R4
Q10
Q18
Q16
Q21
Q17
OUTPUT
R13
6
Q19
Q6
Q5
R12 = 16.7kΩ
Q4
R5
Q1
R1
R2
GROUND
4
Q2
Q3
Q20
R9 = 50kΩ
≈
1.23V
TRIM
5
R11 = 2kΩ
R10
00372-F-002
Figure 2. Simplified Schematic
Rev. F
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703
© 2004 Analog Devices, Inc. All rights reserved.
REF03
TABLE OF CONTENTS
Electrical Specifications ................................................................... 3
Absolute Maximum Ratings............................................................ 4
ESD Caution.................................................................................. 4
Typical Performance Characteristics ............................................. 5
Applications....................................................................................... 6
Generating an Adjustable Bipolar Voltage Reference.............. 6
Generating a −2.5 V 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
@ V
IN
= 15 V,
−40°C ≤
T
A
≤
+85°C, unless otherwise noted.
Table 1.
Parameter
Output Voltage
Output Voltage Tolerance
Output Voltage
Temperature Coefficient
1
Line Regulation
Load Regulation
Load Current (Sourcing)
Load Current (Sinking)
Short-Circuit Output Current
Quiescent Supply Current
Turn-On Settling Time
2
Output Voltage Noise
Output Adjustment Range
Input Voltage Range
Temperature Voltage Output
3
I
L
I
S
I
SC
I
SY
t
ON
e
n
p-p
∆V
TRIM
V
T
Symbol
V
O
Conditions
No Load
No Load
Min
2.485
REF03G
Typ
2.500
0.2
10
20
0.002
60
0.006
10
−0.3
Output Shorted to Ground
No Load
To ±0.1% of Final Value
0.1 Hz to 10 Hz
R
POT
= 10 kΩ
−0.5
24
1.0
5
6
±11
15
620
Max
2.515
0.6
50
50
0.005
100
0.010
Unit
V
%
ppm/°C
ppm/V
%/V
ppm/mA
%/mA
mA
mA
mA
mA
µs
µV p-p
%
V
mV
TCV
O
V
IN
= 4.5 V to 33 V
I
L
= 0 mA to 10 mA
1.4
±6
4.5
33
1
TCV
O
is measured by the endpoint method, and is equal to
V 85
o
C
−
V
−
40
o
C
) (
)
in ppm
/
o
C
−
6
o
(
2
.
5
×
10
)(
125 C
)
(
2
3
Guaranteed by design.
Limit current in or out of Pin 3 to 50 nA and capacitance on Pin 3 to 30 pF.
+18V
V+
+
10Ω
2
V
IN
10µF
2
V
IN
V
OUT
6
V
OUT
REF03
GND
4
+
00372-F-003
REF03
TRIM
GND
4
5
10kΩ
10µF
–18V
Figure 3. Burn-In Circuit
Figure 4. Output Voltage Trim Method
Rev. F | Page 3 of 8
00372-F-004
REF03
ABSOLUTE MAXIMUM RATINGS
T
A
= 25°C, unless otherwise noted.
Table 2.
Parameter
Input Voltage
Output Short-Circuit Duration
Operating Temperature Range
REF03G (P, S)
Storage Temperature Range
Junction Temperature Range
Lead Temperature (Soldering, 10 sec)
Rating
40 V
Indefinite
−40°C to +85°C
−65°C to +175°C
−65°C to +175°C
300°C
Absolute maximum ratings apply to both DICE and packaged parts, unless otherwise noted.
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
8-Lead PDIP (P)
8-Lead SOIC (S)
θ
JA1
110
160
θ
JC
50
44
Unit
°C/W
°C/W
1
θ
JA
is specified for worst-case mounting conditions, i.e., θ
JA
is specified for device in socket for PDIP package; θ
JA
is specified for device soldered to printed circuit board
for SOIC package.
ESD CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.
Rev. F | Page 4 of 8
REF03
TYPICAL PERFORMANCE CHARACTERISTICS
20
T
A
= 25°C
MAXIMUM LOAD CURRENT (mA)
1.2
V
IN
= 15V
T
A
= 25°C
V
IN
= 15V
0.1Hz TO 10Hz
19
QUIESCENT CURRENT (mA)
1.1
18
17
1.0
16
0.9
00372-F-009
00372-F-013
00372-F-005
15
14
10
15
20
25
30
INPUT VOLTAGE (V)
35
40
0.8
–40
–20
0
20
40
TEMPERATURE (°C)
60
80
100
3.2
5.9
OUTPUT VOLTAGE NOISE (µV p-p)
8.6
Figure 5. Maximum Load Current vs. Input
Voltage
65
T
A
= 25°C
LOAD REGULATION (ppm/mA)
Figure 9. Quiescent Current vs. Temperature
Figure 13. Typical Distribution of Output
Voltage Noise
92
82
10
32
LINE REGULATION (ppm/V)
–40°C
≤
T
A
≤
+85°C
V
IN
= 15V
60
LINE REGULATION (dB)
72
62
100
320
55
52
42
1000
3200
50
00372-F-006
45
4
8
12
16
20
24
INPUT VOLTAGE (–V)
28
32
22
10
100
1k
10k
FREQUENCY (Hz)
100k
32000
1M
–45
–30
–15
0
15
30
OUTPUT VOLTAGE TEMPCO (ppm/°C)
45
Figure 6. Load Regulation (∆I
L
= 10 mA) vs.
Input Voltage
200
T
A
= 25°C
Figure 10. Line Regulation vs. Frequency
Figure 14. Typical Distribution of Output
Voltage Tempco
1.4
V
IN
= 15V
1.3
150
LOAD REG–T/LOAD REG (25°C)
LOAD REGULATION (ppm/V)
1.2
1.1
1.0
0.9
0.8
0.7
0.6
–40
00372-F-011
100
50
00372-F-007
0
4
8
12
16
20
INPUT VOLTAGE (V)
24
28
32
–20
0
20
40
TEMPERATURE (°C)
60
80
100
Figure 7. Line Regulation vs. Input Voltage
35
V
IN
= 15V
30
MAXIMUM LOAD CURRENT (mA)
Figure 11. Normalized Load Regulation
(∆I
L
= 10 mA) vs. Temperature
1000
V
IN
= 15V
T
A
= 25°C
25
OUTPUT NOISE (µV p-p)
20
100
15
10
5
10
00372-F-008
0
–40
–20
0
20
40
TEMPERATURE (°C)
60
80
100
1
10
100
1k
10k
FREQUENCY (Hz)
100k
1M
Figure 8. Maximum Load Current vs.
Temperature
Figure 12. Wideband Output Noise vs.
Bandwidth (0.1 Hz to Frequency Indicated)
Rev. F | Page 5 of 8
00372-F-012
00372-F-014
V
IN
= 15V
T
A
= 25°C
00372-F-010
32
10000
MEMS传感器
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