1993 Burr-Brown Corporation
PDS-1177G
Printed in U.S.A. December, 1993
+5V Precision
VOLTAGE REFERENCE
FEATURES
q
OUTPUT VOLTAGE: +5V
0.1% max
q
EXCELLENT TEMPERATURE STABILITY:
8.5ppm/
C max (40
C to +85
C)
q
LOW NOISE: 10
Vp-p max (0.1Hz to 10Hz)
q
EXCELLENT LINE REGULATION:
0.008%/V max
q
EXCELLENT LOAD REGULATION:
0.005%/mA max
q
LOW SUPPLY CURRENT: 1.4mA max
q
SHORT-CIRCUIT PROTECTED
q
WIDE SUPPLY RANGE: 8V to 40V
q
EXTENDED INDUSTRIAL TEMPERATURE
RANGE: 40
C to +85
C
q
PACKAGE OPTIONS: Plastic DIP, SOIC
REF02
APPLICATIONS
q
PRECISION REGULATORS
q
CONSTANT CURRENT SOURCE/SINK
q
DIGITAL VOLTMETERS
q
V/F CONVERTERS
q
A/D AND D/A CONVERTERS
q
PRECISION CALIBRATION STANDARD
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TEST EQUIPMENT
DESCRIPTION
The REF02 is a precision 5V voltage reference. The
drift is laser trimmed to 8.5ppm/
C max over the
extended industrial and military temperature range.
The REF02 provides a stable 5V output that can be
externally adjusted over a
6% range with minimal
effect on temperature stability. REF02 operates from a
single supply with an input range of 8V to 40V with a
very low current drain of 1mA, and excellent tempera-
ture stability due to an improved design. Excellent line
and load regulation, low noise, low power, and low
cost make the REF02 the best choice whenever a 5V
voltage reference is required. All popular package
options are available: plastic DIP, and SOIC. The
REF02 is an ideal choice for portable instrumentation,
temperature transducers, A/D and D/A converters, and
digital voltmeter.
V
OUT
REF02
V
IN
Trim
GND
+5V Reference with Trimmed Output
2
6
5
4
R
POT
10k
(Optional)
Output
3
Temp
International Airport Industrial Park Mailing Address: PO Box 11400, Tucson, AZ 85734 Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 Tel: (520) 746-1111 Twx: 910-952-1111
Internet: http://www.burr-brown.com/ FAXLine: (800) 548-6133 (US/Canada Only) Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132
REF02
REF02
2
REF02
V
MAX
V
MIN
5V
V
O
=
x 100
SPECIFICATIONS
ELECTRICAL
At T
A
= +25
C and V
IN
= +15V power supply, unless otherwise noted.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
REF02A, R
REF02B, S
REF02C
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
OUTPUT VOLTAGE
I
LOAD
= 0mA
4.985
5.0
5.015
4.990
T
5.010
4.995
T
5.005
V
Change with Temperature
(1, 2)
(
V
OT
)
40
C to +85
C
0.05
0.19
0.05
0.13
0.05
0.11
%
OUTPUT VOLTAGE DRIFT
(3)
40
C to +85
C (TCV
O
)
4
15
4
10
4
8.5
ppm/
C
OUTPUT ADJUSTMENT
RANGE
R
POT
= 10k
(6)
3
6
T
T
T
T
%
CHANGE IN V
O
TEMP
COEFFICIENT WITH
OUTPUT ADJUSTMENT
(55
C to +125
C)
R
POT
= 10k
0.7
T
T
ppm/%
OUTPUT VOLTAGE NOISE
0.1Hz to 10Hz
(5)
4
10
T
T
T
T
Vp-p
LINE REGULATION
(4)
V
IN
= 8V to 33V
0.006
0.010
T
T
0.004
0.008
%/V
40
C to +85
C
V
IN
= 8.5V to 33V
0.008
0.012
T
T
0.005
0.010
LOAD REGULATION
(4)
I
L
= 0mA to +10mA
0.005
0.010
T
0.008
0.003
0.005
%/mA
40
C to +85
C
I
L
= 0mA to +10mA
0.007
0.012
T
0.010
0.004
0.005
TURN-ON SETTLING TIME
To
0.1%
5
T
T
s
of Final Value
QUIESCENT CURRENT
No Load
1.0
1.4
T
T
T
T
mA
LOAD CURRENT (SOURCE)
10
21
T
T
T
T
mA
LOAD CURRENT (SINK)
0.3
0.5
T
T
T
T
mA
SHORT-CIRCUIT CURRENT
V
OUT
= 0
30
T
T
mA
POWER DISSIPATION
No Load
15
21
T
T
T
T
mW
TEMPERATURE VOLTAGE
OUTPUT
(7)
630
T
T
mV
TEMPERATURE COEFFICIENT
of Temperature Pin Voltage
55
C to +125
C
2.1
mV/
C
TEMPERATURE RANGE
Specification
REF02A, B, C
40
+85
T
T
T
T
C
NOTES: (1)
V
OT
is defined as the absolute difference between the maximum output and the minimum output voltage over the specified temperature range expressed
as a percentage of 5V: (2)
V
OT
specification applies trimmed to +5.000V or untrimmed. (3) TCV
O
is defined as
V
OT
divided by
the temperature range. (4) Line and load regulation specifications include the effect of self heating. (5) Sample tested. (6) 10k
potentiometer connected between
V
OUT
and ground with wiper connected to Trim pin. See Figure on page 1. (7) Pin 3 is insensitive to capacitive loading. The temperature voltage will be modified by
7mV for each
A of loading.
3
REF02
Input Voltage ...................................................................................... +40V
Operating Temperature
G, P, U ........................................................................... 40
C to +85
C
Storage Temperature Range
G, P, U ........................................................................... 65
C to +125
M .................................................................................... 65
C to +150
Output Short Circuit Duration (to Ground or V
IN
) ....................... Indefinite
Junction Temperature ....................................................... 65
C to +150
JA
P ......................................................................................... 120
C/W
U ........................................................................................... 80
C/W
Lead Temperature (soldering, 60s) ............................................... +300
C
ABSOLUTE MAXIMUM RATINGS
PIN CONFIGURATIONS
Top View
DIP/SOIC
NC
V
IN
Temp
GND
NC
NC
V
OUT
Trim
1
2
3
4
8
7
6
5
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.
PRODUCT
V
OUT
AT 25
C
(ppm/
C)
TEMPERATURE
PACKAGE
REF02AU
5V
15mV
15
40
C to +85
C
SOIC
REF02BU
5V
10mV
10
40
C to +85
C
SOIC
REF02AP
5V
15mV
15
40
C to +85
C
Plastic DIP
REF02BP
5V
10mV
10
40
C to +85
C
Plastic DIP
ORDERING INFORMATION
MAX DRIFT
PACKAGE INFORMATION
PACKAGE DRAWING
PRODUCT
PACKAGE
NUMBER
(1)
REF02AU
SOIC
182
REF02BU
SOIC
182
REF02AP
Plastic DIP
006
REF02BP
Plastic DIP
006
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.
4
REF02
TYPICAL PERFORMANCE CURVES
AT T
A
= +25
C, unless otherwise noted.
OUTPUT WIDEBAND NOISE
vs BANDWIDTH (0.1Hz to frequency indicated)
Frequency (Hz)
Output Noise (Vp-p)
10
100
1k
10k
100k
1M
1k
100
10
1
OUTPUT CHANGE DUE TO THERMAL SHOCK
Time (s)
Percent Change in Output Voltage (%)
0.035
0.03
0.025
0.02
0.015
0.01
0.005
0
10
0
10
20
30
40
50
60
Device immersed
in 75C oil bath
T
A
=
25C
T
A
=
75C
V
IN
= 15V
MAXIMUM LOAD CURRENT vs INPUT VOLTAGE
Maximum Load Current (mA)
Input Voltage (V)
5
10
15
20
25
35
30
25
20
15
10
5
0
500mW
Maximum
Dissapation
Short Circuit Protection
T
A
= +25C
LINE REGULATION vs SUPPLY VOLTAGE
Input Voltage (V)
6
5
4
3
2
1
0
Line Regulation (%/V)
6
6.5
7
7.5
8
8.5
9
9.5
10
85C
25C
125C
55C
LINE REGULATION vs SUPPLY VOLTAGE
Input Voltage (V)
0.03
0.025
0.02
0.015
0.01
0.005
0
Line Regulation (%/V)
5
T
A
= 25C
10
15
20
25
30
LINE REGULATION vs FREQUENCY
Line Regulation (dB)
Frequency (Hz)
10
100
1k
10k
100k
1M
Line Regulation (%/V)
96
86
76
66
56
46
36
26
16
6
0.0003
0.001
0.003
0.01
0.031
0.1
0.31
1.0
3.1
10.0
V
S
= 15V
T
A
= +25C
5
REF02
TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25
C, unless otherwise noted.
NORMALIZED LOAD REGULATION (
IL = 10mA)
vs TEMPERATURE
60
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
Temperature (C)
40
20
0
20
40
60
80
100
120
140
Load Reg (T) / Load Reg (25C)
V
IN
= 15V
NORMALIZED LINE REGULATION vs TEMPERATURE
60
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
Temperature (C)
40
20
0
20
40
60
80
100
120
140
Line Reg (T) / Line Reg (25C)
REF02 V
OUT
Temperature
Volt
5.002
5.0015
5.001
5.0005
5
4.9995
4.999
4.9985
4.998
4.9975
60
40
20
0
20
40
60
80
100
120
140
MAXIMUM LOAD CURRENT vs TEMPERATURE
Temperature (C)
30
25
20
15
10
5
0
Maximum Load Current (mA)
60 40
20
0
20
40
60
80
100
120 140
V
IN
= 15V
QUIESCENT CURRENT vs TEMPERATURE
Temperature (C)
1.1
1.08
1.06
1.04
1.02
1.0
0.98
Quiescent Current (mA)
60 40
20
0
20
40
60
80
100
120 140
V
IN
= 15V
TYPICAL TEMPERATURE VOLTAGE OUTPUT
vs TEMPERATURE (REF02M)
Temperature Voltage Output (mV)
Temperature (C)
60 40
20
0
20
40
60
80
100
120 140
830
780
730
680
630
580
530
480
430
V
IN
= 15V
6
REF02
OUTPUT ADJUSTMENT
The REF02 trim terminal can be used to adjust the voltage
over a 5V
150mV range. This feature allows the system
designer to trim system errors by setting the reference to a
voltage other than 5V, including 5.12V
(1)
for binary applica-
tions (see circuit on page one).
Adjustment of the output does not significantly affect the
temperature performance of the device. The temperature
coefficient change is approximately 0.7ppm/
C for 100mV of
output adjustment.
NOTE: (1) 20mV LSB for 8-bit applications.
TYPICAL APPLICATIONS
5k
OPA177
10k
10k
15V
+15V
5V
5V
Trim
GND
V
IN
3
5
4
2
REF02
0.1F
V
O
Temp
6
FIGURE 2.
5V Precision Reference.
REF02
GND
2
4
18V
+18V
V
IN
FIGURE 1. Burn-In Circuit.
REFERENCE STACKING
PROVIDES OUTSTANDING LINE REGULATION
By stacking two REF01s and one REF02, a systems designer
can achieve 5V, 15V and 25V outputs. One very important
advantage of this circuit is the near perfect line regulation at
5V and 15V outputs. This circuit can accept a 27V to 55V
change to the input with less than the noise voltage as a
change to the output voltage. (R
B
), a load bypass resistor,
supplies current (I
SY
) for the 15V regulator.
Any number of REF01s and REF02s can be stacked in this
configuration. If ten devices can be stacked in this configu-
ration, for example, ten 5V or five 10V outputs are achieved.
The line voltage may range from 100V to 130V. Care should
be exercised to insure that the total load currents do not
exceed the maximum usable current which is typically
21mA.
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