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REF05
+5V Precision
VOLTAGE REFERENCE
(Guaranteed Long-Term Stability)
APPLICATIONS
●PRECISION REGULATORS
●CONSTANT CURRENT SOURCE/SINK
●DIGITAL VOLTMETERS
●A/D AND D/A CONVERTERS
●PRECISION CALIBRATION STANDARD
●TEST EQUIPMENT
DESCRIPTION
The REF05 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 REF05 provides a stable 5V output that can be
externally adjusted over a ±6% range with minimal
effect on temperature stability. REF05 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 REF05 the best choice whenever a 5V
voltage reference is required. The REF05 is an ideal
choice for portable instrumentation, temperature trans-
ducers, A/D and D/A converters, and digital voltmeter.
LONG TERM DRIFT OF THE AVERAGE OF 30 DEVICES
0
Time (Days)
20 40 60 80 100 120 140 160 180
100
80
60
40
20
0
–20
–40
–60
–80
–100
REF05 Drift Over Time (ppm)
FEATURES
●OUTPUT VOLTAGE: +5V ±0.1% max
●GUARANTEED LONG-TERM STABILITY:
25ppm/1000 hrs max
●EXCELLENT TEMPERATURE STABILITY:
8.5ppm/°C max (–55°C to +125°C)
●LOW NOISE: 10µVp-p typ (0.1Hz to 10Hz)
●EXCELLENT LINE REGULATION:
0.008%/V max
●EXCELLENT LOAD REGULATION:
0.005%/mA max
●LOW SUPPLY CURRENT: 1.4mA max
●SHORT-CIRCUIT PROTECTED
●WIDE SUPPLY RANGE: 8VDC to 40VDC
●HIGH LOAD DRIVING CAPACITY: 20mA
●PACKAGE: Hermetic TO-99
©1993 Burr-Brown Corporation PDS-1178A Printed in U.S.A. December, 1993
2
REF05
NOTES: (1) ∆VOT 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) ∆VOT specification applies trimmed to +5.000V or untrimmed. (3) TCVO is defined as ∆VOT divided
by the temperature range. (4) Line and load regulation specifications include the effect of self heating. (5) Sample tested. (6) 10kΩ potentiometer connected between
VO and ground with wiper connected to Trim pin. See Figure 1. (7) Pin 3 is insensitive to capacitive loading. The temperature voltage will be modified by 7mV for
each µA of loading. (8) Samples tested for long term stability are tested with continuous power applied.
∆VOT = × 100
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.
REF05R REF05S
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
OUTPUT VOLTAGE (∆VOT)IL = 0mA 4.985 5.00 5.015 4.990 5.00 5.010 V
Change with Temperature(1, 2)
–55°C to +125°C 0.05 0.27 0.05 0.15 %
OUTPUT VOLTAGE DRIFT(3)
–55°C to +125°C (TCVO) 4 15 4 8.5 ±ppm/°C
LONG TERM STABILITY(8) 10 25 10 25 ±ppm/1K hrs
OUTPUT ADJUSTMENT
RANGE RPOT = 10kΩ(6) ±3±6±3±6%
CHANGE IN VO TEMP
COEFFICIENT WITH
OUTPUT ADJUSTMENT
(–55°C to +125°C) RPOT = 10kΩ(6) 0.7 0.7 ppm/%
OUTPUT VOLTAGE NOISE 0.1Hz to 10Hz(5) 410 410µVp-p
LINE REGULATION(4) VIN = 8V to 33V 0.006 0.010 0.006 0.010 %/V
–55°C to +125°CV
IN = 9V to 33V 0.009 0.015 0.009 0.015
LOAD REGULATION(4) IL = 0mA to +10mA 0.005 0.010 0.005 0.008 %/mA
–55°C to +125°CI
L
= 0mA to +10mA 0.008 0.015 0.008 0.012
TURN-ON SETTLING TIME To ±0.1% 5 5 µs
of Final Value
QUIESCENT CURRENT No Load 1.0 1.4 1.0 1.4 mA
LOAD CURRENT (Source) 10 21 10 21 mA
LOAD CURRENT (Sink) –0.3 –0.5 * * mA
SHORT-CIRCUIT CURRENT VO = 0 30 30 mA
POWER DISSIPATION 15 21 15 21 mW
TEMPERATURE VOLTAGE
OUTPUT(7) 630 630 mV
TEMPERATURE COEFFICIENT
OF TEMPERATURE PIN
VOLTAGE 2.1 2.1 mV/°C
TEMPERATURE RANGE
Specification
REF05R, S –55 +125 * * °C
SPECIFICATIONS
ELECTRICAL
TA = +25°C and VS = +15V power supply unless otherwise noted.
|VMAX – VMIN|
5V
3REF05
Input Voltage......................................................................................+40V
Operating Temperature
M ..................................................................................–55°C to +125°C
Storage Temperature Range
M ..................................................................................–65°C to +150°C
Output Short Circuit Duration (to Ground or VIN) ....................... Indefinite
Junction Temperature .....................................................–65°C to +150°C
θ
JA M......................................................................................... 150°C/W
Lead Temperature (soldering, 60s) ............................................... +300°C
ABSOLUTE MAXIMUM RATINGS(1) PIN CONFIGURATIONS
Top View
PACKAGE INFORMATION(1)
PACKAGE DRAWING
MODEL PACKAGE NUMBER
REF05RM Metal TO-99 001
REF05SM Metal TO-99 001
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix D of Burr-Brown IC Data Book.
MAX DRIFT
MODEL VOUT AT 25°C (ppm/°C) TEMPERATURE PACKAGE
REF05RM 5V ±15mV ±15 –55°C to +125°C Metal TO-99
REF05SM 5V ±10mV ±8.5 –55°C to +125°C Metal TO-99
ORDERING INFORMATION
PONY TAIL DRIFT PLOT
100
80
60
40
20
0
–20
–40
–60
–80
–100 0 20 40 60 80 100 120 140 160 180
Time (Days)
REF05 Drift Over Tiime (ppm)
Long Time Drift Plot of 30 Randomly Selected REF05s
8
4
26
1
35
7
NC
VOUT
V+
GND
(Case)
NC
Trim
Temp
NC
M Package
4
REF05
TYPICAL PERFORMANCE CURVES
TA = +25°C unless otherwise noted.
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
= +25°C
OUTPUT WIDEBAND NOISE
vs BANDWIDTH (0.1Hz to frequency indicated)
Frequency (Hz)
Output Noise (µVp-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
0–100 102030405060
Device immersed
in 75°C oil bath
T
A
=
25°C T
A
=
75°C
V
IN
= 15V
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
85°C
25°C
125°C
–55°C
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
= 25°C
10 15 20 25 30
MAXIMUM LOAD CURRENT vs INPUT VOLTAGE
Maximum Load Current (mA)
Input Voltage (V)
5 10152025
35
30
25
20
15
10
5
0
500mW
Maximum
Dissapation
Short Circuit Protection
T
A
= +25°C
5REF05
TYPICAL PERFORMANCE CURVES (CONT)
TA = +25°C unless otherwise noted.
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
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 (25°C)
V
IN
= 15V
REF05 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
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 (25°C)
TYPICAL TEMPERATURE VOLTAGE OUTPUT
vs TEMPERATURE (REF05M)
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
REF05
OUTPUT ADJUSTMENT
The REF05 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 Figure 1).
FIGURE 4. Current Source.
FIGURE 5. ±2.5V Precision Reference.
FIGURE 6. Current Sink.
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.
V
OUT
REF05
V
IN
Trim
GND
+5V Reference with Trimmed Output
2
6
5
4
R
POT
10kΩ
(Optional)
Output
3Temp
FIGURE 1.
FIGURE 2. Burn-In Circuit.
REF05
GND
2
4
–18V
+18V
V
IN
TYPICAL APPLICATIONS
FIGURE 3. ±5V Precision Reference.
5kΩOPA177
10kΩ
10kΩ
–15V
+15V
–5V
–5V
Trim
GND
V
IN
35
4
2
REF05
0.1µF
V
O
Temp
6
I
OUT
= + 1mA
5.0V
R
R
I
OUT
GND
V
IN
V
O
Trim
3
26
5
4
Voltage Compliance: –25V to +8V
+15V
REF05
Temp
R
1
5.6kΩ
V
O
+2.5V
V
REF
V
O
–2.5V
OPA177
REF05
R
2
5.6kΩ
–9V
5V
+
–
R
1
R
1
+ R
2
V
O
=
+
(V
REF
)R
2
R
1
+ R
2
V
O
=
–
(V
REF
)
7
6
43
2
4
26
GND
V
IN
V
O
I
OUT
= + 1mA
5.0V
R
R
I
OUT
GND
V
IN
V
O
Trim
3
26
5
4
Voltage Compliance: –8V to +25V
–15V
REF05
Temp