www.ti.com
REF5020, REF5025
,
REF5030, REF5040
REF5045, REF5050
SBOS410 – JUNE 2007
Low-Noise, Very Low Drift, Precision
VOLTAGE REFERENCE
1
FEATURES
•
LOW TEMPERATURE DRIFT:
– High-Grade: 3ppm/°C (max)
– Standard-Grade: 8ppm/°C (max)
HIGH ACCURACY:
– High-Grade: 0.05% (max)
– Standard-Grade: 0.1% (max)
LOW NOISE: 3μV
PP
/V
HIGH OUTPUT CURRENT: ±10mA
TEMPERATURE RANGE: –40°C to +125°C
2
DESCRIPTION
The REF50xx is a family of low-noise, low-drift, very
high precision voltage references. These references
are capable of both sinking and sourcing, and are
very robust with regard to line and load changes.
Excellent temperature drift (3ppm/°C) and high
accuracy (0.05%) are achieved using proprietary
design techniques. These features, combined with
very-low noise make the REF50xx family ideal for use
in high-precision data acquisition systems.
Each reference voltage is available in both standard-
and high-grade versions. They are offered in MSOP-8
(available Q3, 2007) and SO-8 packages, and are
specified from –40°C to +125°C.
REF50xx Family
MODEL
REF5020
REF5025
REF5030
REF5040
REF5045
REF5050
OUTPUT VOLTAGE
2.048V
2.5V
3.0V
4.096V
4.5V
5.0V
•
•
•
•
•
•
•
•
•
•
APPLICATIONS
16-BIT DATA ACQUISITION SYSTEMS
ATE EQUIPMENT
INDUSTRIAL PROCESS CONTROL
MEDICAL INSTRUMENTATION
OPTICAL CONTROL SYSTEMS
PRECISION INSTRUMENTATION
+5V
Input
Signal
0V to 4V
R
1
50W
OPA365
C
1
1.2nF
+IN
ADS8326
-IN
REF
+5V
DNC
(1)
V
DD
V
IN
TEMP
GND
GND
REF5040
+5V
C
BYPASS
1
m
F
GND
V
IN
V
OUT
C
2
22
m
F
NOTES: (1) DNC = Do not connect.
(2) NC = No internal connection.
(3) MSOP-8 package available Q3, 2007.
4
SO-8, MSOP-8
(3)
5
1
2
REF50xx
3
6
V
OUT
TRIM
8
7
DNC
(1)
NC
(2)
1
2
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
Copyright © 2007, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
REF5020, REF5025
,
REF5030, REF5040
REF5045, REF5050
SBOS410 – JUNE 2007
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments 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.
PACKAGE/ORDERING INFORMATION
(1)
PRODUCT
STANDARD GRADE (8ppm, 0.1%)
REF5020A
2.048V
SO-8
MSOP-8
SO-8
MSOP-8
SO-8
MSOP-8
SO-8
MSOP-8
(2)
SO-8
MSOP-8
SO-8
MSOP-8
(2)
(2)
(2)
(2)
(2)
OUTPUT VOLTAGE
PACKAGE-LEAD
PACKAGE DESIGNATOR
PACKAGE MARKING
D
DGK
D
DGK
D
DGK
D
DGK
D
DGK
D
DGK
REF5020
R50A
REF5025
R50B
REF5030
R50C
REF5040
R50D
REF5045
R50E
REF5050
R50F
REF5025A
2.5V
REF5030A
3.0V
REF5040A
4.096V
REF5045A
4.5V
REF5050A
HIGH GRADE (3ppm, 0.05%)
REF5020I
5.0V
2.048V
SO-8
MSOP-8
SO-8
MSOP-8
SO-8
MSOP-8
SO-8
MSOP-8
SO-8
MSOP-8
SO-8
MSOP-8
(2)
(2)
(2)
(2)
(2)
(2)
D
DGK
D
DGK
D
DGK
D
DGK
D
DGK
D
DGK
REF5020
R50A
REF5025
R50B
REF5030
R50C
REF5040
R50D
REF5045
R50E
REF5050
R50F
REF5025I
2.5V
REF5030I
3.0V
REF5040I
4.096V
REF5045I
4.5V
REF5050I
5.0V
(1)
(2)
For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI
web site at
www.ti.com.
MSOP-8 (DGK) package available Q3, 2007.
ABSOLUTE MAXIMUM RATINGS
(1)
PARAMETER
Input Voltage
Output Short-Circuit
Operating Temperature Range
Storage Temperature Range
Junction Temperature (T
J
max)
ESD Rating
(1)
Human Body Model (HBM)
Charged Device Model (CDM)
REF50xx
+18
30
–55 to +125
–55 to +150
+150
3000
1000
UNIT
V
mA
°C
°C
°C
V
V
Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may
degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond
those specified is not implied.
2
Copyright © 2007, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Link(s):
REF5020 REF5025 REF5030 REF5040 REF5045 REF5050
www.ti.com
REF5020, REF5025
,
REF5030, REF5040
REF5045, REF5050
SBOS410 – JUNE 2007
ELECTRICAL CHARACTERISTICS: PER DEVICE
Boldface
limits apply over the specified temperature range,
T
A
= –40°C to +125°C.
At T
A
= +25°C, I
LOAD
= 0, C
L
= 1μF, and V
IN
= (V
OUT
+ 0.2V) to 18V, unless otherwise noted.
PER DEVICE
PARAMETER
CONDITIONS
REF5020 (V
OUT
= 2.048V)
OUTPUT VOLTAGE
Output Voltage
Initial Accuracy: High-Grade
Standard-Grade
NOISE
Output Voltage Noise
f = 0.1Hz to 10Hz
REF5025 (V
OUT
= 2.5V)
OUTPUT VOLTAGE
Output Voltage
Initial Accuracy: High-Grade
Standard-Grade
NOISE
Output Voltage Noise
f = 0.1Hz to 10Hz
REF5030 (V
OUT
= 3.0V)
OUTPUT VOLTAGE
Output Voltage
Initial Accuracy: High-Grade
Standard-Grade
NOISE
Output Voltage Noise
f = 0.1Hz to 10Hz
REF5040 (V
OUT
= 4.096V)
OUTPUT VOLTAGE
Output Voltage
Initial Accuracy: High-Grade
Standard-Grade
NOISE
Output Voltage Noise
f = 0.1Hz to 10Hz
REF5045 (V
OUT
= 4.5V)
OUTPUT VOLTAGE
Output Voltage
Initial Accuracy: High-Grade
Standard-Grade
NOISE
Output Voltage Noise
f = 0.1Hz to 10Hz
REF5050 (V
OUT
= 5.0V)
OUTPUT VOLTAGE
Output Voltage
Initial Accuracy: High-Grade
Standard-Grade
NOISE
Output Voltage Noise
f = 0.1Hz to 10Hz
15
μV
PP
V
OUT
–0.05
–0.1
5.0
0.05
0.1
V
%
%
13.5
μV
PP
V
OUT
–0.05
–0.1
4.5
0.05
0.1
V
%
%
12
μV
PP
V
OUT
–0.05
–0.1
4.096
0.05
0.1
V
%
%
9
μV
PP
V
OUT
–0.05
–0.1
3.0
0.05
0.1
V
%
%
7.5
μV
PP
V
OUT
–0.05
–0.1
2.5
0.05
0.1
V
%
%
6
μV
PP
V
OUT
2.7V < V
IN
< 18V
–0.05
–0.1
2.048
0.05
0.1
V
%
%
(1)
MIN
TYP
MAX
UNIT
(1)
For V
OUT
≤
2.5V, the minimum supply voltage is 2.7V.
Copyright © 2007, Texas Instruments Incorporated
3
Submit Documentation Feedback
Product Folder Link(s):
REF5020 REF5025 REF5030 REF5040 REF5045 REF5050
REF5020, REF5025
,
REF5030, REF5040
REF5045, REF5050
SBOS410 – JUNE 2007
www.ti.com
ELECTRICAL CHARACTERISTICS: ALL DEVICES
Boldface
limits apply over the specified temperature range,
T
A
= –40°C to +125°C.
At T
A
= +25°C, I
LOAD
= 0, C
L
= 1μF, and V
IN
= (V
OUT
+ 0.2V) to 18V, unless otherwise noted.
REF50xx
PARAMETER
OUTPUT VOLTAGE TEMPERATURE DRIFT
Output Voltage Temperature Drift
High-Grade
Standard-Grade
LINE REGULATION
Line Regulation
REF5020
(1)
Only
All Other Devices
Over Temperature
LOAD REGULATION
Load Regulation
Over Temperature
SHORT-CIRCUIT CURRENT
Short-Circuit Current
TEMP PIN
Voltage Output
Temperature Sensitivity
TURN-ON SETTLING TIME
Turn-On Settling Time
POWER SUPPLY
Supply Voltage
Quiescent Current
Over Temperature
TEMPERATURE RANGE
Specified Range
Operating Range
Thermal Resistance
MSOP-8
SO-8
θ
JA
150
150
°C/W
°C/W
–40
–55
+125
+125
°C
°C
V
S
See Note
(1)
CONDITIONS
MIN
TYP
MAX
UNIT
dV
OUT
/dT
2.5
3
3
8
ppm/°C
ppm/°C
dV
OUT
/dV
IN
V
IN
= 2.7V to 18V
0.1
0.1
0.2
1
1
1
ppm/V
ppm/V
ppm/V
dV
OUT
/d
ILOAD
–10mA < I
LOAD
< +10mA, V
IN
= V
OUT
+ 0.75V
20
30
50
ppm/mA
ppm/mA
I
SC
V
OUT
= 0
At T
A
= +25°C
25
mA
575
2.64
mV
mV/°C
To 0.1% with C
L
= 1μF
V
OUT
+ 0.2
(1)
200
μs
18
0.8
1
1.2
V
mA
mA
(1)
For V
OUT
≤
2.5V, the minimal supply voltage is 2.7V.
4
Copyright © 2007, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Link(s):
REF5020 REF5025 REF5030 REF5040 REF5045 REF5050
www.ti.com
REF5020, REF5025
,
REF5030, REF5040
REF5045, REF5050
SBOS410 – JUNE 2007
TYPICAL CHARACTERISTICS
At T
A
= +25°C, I
LOAD
= 0, and V
S
= V
OUT
+ 0.2V, unless otherwise noted. For V
OUT
≤
2.5V, the minimum supply voltage is 2.7V.
TEMPERATURE DRIFT
(0°C to +85°C)
TEMPERATURE DRIFT
(–40°C to +125°C)
Population (%)
Population (%)
0
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
5.00
5.50
6.00
6.50
7.00
7.50
0
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
2.75
3.00
3.25
3.50
3.75
4.00
4.25
4.50
4.75
5.00
Drift (ppm/
°
C)
Drift (ppm/°C)
Figure 1.
OUTPUT VOLTAGE
INITIAL ACCURACY
0.05
0.04
Figure 2.
OUTPUT VOLTAGE ACCURACY
vs TEMPERATURE
Output Voltage Accuracy (%)
0.03
0.02
0.01
0
-0.01
-0.02
-0.03
-0.04
Population (%)
-0.01
0.01
-0.03
-0.02
0.02
0.03
-0.05
-0.04
0.04
0.05
0
-0.05
-50
-25
0
25
50
Temperature (°C)
75
100
125
Drift (ppm/°C)
Figure 3.
POWER-SUPPLY REJECTION RATIO
vs FREQUENCY
160
140
Dropout Voltage (V)
Figure 4.
DROPOUT VOLTAGE vs LOAD CURRENT
0.8
+125°C
0.7
0.6
0.5
-40°C
0.4
0.3
0.2
0.1
0
+25°C
120
PSRR (dB)
100
80
60
40
20
0
10
100
1k
Frequency (Hz)
10k
100k
-15
-10
-5
0
5
Load Current (mA)
10
8.00
15
Figure 5.
Figure 6.
Copyright © 2007, Texas Instruments Incorporated
5
Submit Documentation Feedback
Product Folder Link(s):
REF5020 REF5025 REF5030 REF5040 REF5045 REF5050
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