TI REF5025ID

REF5010, REF5020
REF5025, REF5030
REF5040, REF5045, REF5050
www.ti.com.................................................................................................................................................. SBOS410C – JUNE 2007 – REVISED DECEMBER 2008
Low-Noise, Very Low Drift, Precision
VOLTAGE REFERENCE
FEATURES
DESCRIPTION
1
• 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: 3µVPP/V
• HIGH OUTPUT CURRENT: ±10mA
• TEMPERATURE RANGE: –40°C to +125°C
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.
2
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 standardand high-grade versions. They are offered in
MSOP-8(3) and SO-8 packages, and are specified
from –40°C to +125°C.
APPLICATIONS
•
•
•
•
•
•
16-BIT DATA ACQUISITION SYSTEMS
ATE EQUIPMENT
INDUSTRIAL PROCESS CONTROL
MEDICAL INSTRUMENTATION
OPTICAL CONTROL SYSTEMS
PRECISION INSTRUMENTATION
REF50xx Family
+5V
Input
Signal
0V to 4V
MODEL
OUTPUT VOLTAGE
REF5020
2.048V
REF5025
2.5V
REF5030
3.0V
REF5040
4.096V
REF5045
4.5V
REF5050
5.0V
REF5010
10.0V
+5V
R1
50W
VDD
+IN
OPA365
ADS8326
C1
1.2nF
-IN
REF
VIN
CBYPASS
1m F
GND
DNC(1)
7
NC(2)
3
6
VOUT
4
5
1
VIN
2
TEMP
GND
REF50xx
GND
TRIM/NR
SO-8, MSOP-8(3)
REF5040
+5V
8
DNC(1)
VOUT
C2
22mF
NOTES: (1) DNC = Do not connect.
(2) NC = No internal connection.
(3) Contact a TI sales representative for information
regarding MSOP-8 (DGK) package availability.
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.
UNLESS OTHERWISE NOTED this document contains
PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007–2008, Texas Instruments Incorporated
REF5010,, REF5020
REF5025, REF5030
REF5040, REF5045, REF5050
SBOS410C – JUNE 2007 – REVISED DECEMBER 2008.................................................................................................................................................. 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
OUTPUT VOLTAGE
PACKAGE-LEAD
PACKAGE DESIGNATOR
PACKAGE MARKING
REF5020
STANDARD GRADE (8ppm, 0.1%)
REF5020A
2.048V
REF5025A
2.5V
REF5030A
3.0V
REF5040A
4.096V
REF5045A
4.5V
REF5050A
5.0V
REF5010A
10.0V
SO-8
D
MSOP-8 (2)
DGK
R50A
SO-8
D
REF5025
MSOP-8 (2)
DGK
R50B
SO-8
D
REF5030
MSOP-8 (2)
DGK
R50C
SO-8
D
REF5040
MSOP-8 (2)
DGK
R50D
SO-8
D
REF5045
MSOP-8 (2)
DGK
R50E
SO-8
D
REF5050
MSOP-8 (2)
DGK
R50F
SO-8
D
REF5010
MSOP-8 (2)
DGK
R50G
REF5020
HIGH GRADE (3ppm, 0.05%)
REF5020I
2.048V
REF5025I
2.5V
REF5030I
3.0V
REF5040I
4.096V
REF5045I
4.5V
REF5050I
5.0V
REF5010I
(1)
(2)
10.0V
SO-8
D
MSOP-8 (2)
DGK
R50A
SO-8
D
REF5025
MSOP-8 (2)
DGK
R50B
SO-8
D
REF5030
MSOP-8 (2)
DGK
R50C
SO-8
D
REF5040
MSOP-8 (2)
DGK
R50D
SO-8
D
REF5045
MSOP-8 (2)
DGK
R50E
SO-8
D
REF5050
MSOP-8 (2)
DGK
R50F
SO-8
D
REF5010
MSOP-8 (2)
DGK
R50G
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.
Contact a TI sales representative for information regarding MSOP-8 (DGK) package availability.
ABSOLUTE MAXIMUM RATINGS (1)
PARAMETER
REF50xx
Input Voltage
+18
V
Output Short-Circuit
30
mA
Operating Temperature Range
–55 to +125
°C
Storage Temperature Range
–55 to +150
°C
Junction Temperature (TJ max)
ESD Rating
(1)
2
UNIT
+150
°C
Human Body Model (HBM)
3000
V
Charged Device Model (CDM)
1000
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.
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Copyright © 2007–2008, Texas Instruments Incorporated
Product Folder Link(s): REF5010 REF5020 REF5025 REF5030 REF5040 REF5045 REF5050
REF5010,, REF5020
REF5025, REF5030
REF5040, REF5045, REF5050
www.ti.com.................................................................................................................................................. SBOS410C – JUNE 2007 – REVISED DECEMBER 2008
ELECTRICAL CHARACTERISTICS: PER DEVICE
Boldface limits apply over the specified temperature range, TA = –40°C to +125°C.
At TA = +25°C, ILOAD = 0, CL = 1µF, and VIN = (VOUT + 0.2V) to 18V, unless otherwise noted.
PER DEVICE
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
REF5020 (VOUT = 2.048V) (1)
OUTPUT VOLTAGE
Output Voltage
Initial Accuracy:
VOUT
2.7V < VIN < 18V
2.048
V
High-Grade
–0.05
0.05
%
Standard-Grade
–0.1
0.1
%
NOISE
Output Voltage Noise
f = 0.1Hz to 10Hz
µVPP
6
REF5025 (VOUT = 2.5V)
OUTPUT VOLTAGE
Output Voltage
Initial Accuracy:
VOUT
2.5
V
High-Grade
–0.05
0.05
%
Standard-Grade
–0.1
0.1
%
NOISE
Output Voltage Noise
f = 0.1Hz to 10Hz
µVPP
7.5
REF5030 (VOUT = 3.0V)
OUTPUT VOLTAGE
Output Voltage
Initial Accuracy:
VOUT
3.0
V
High-Grade
–0.05
0.05
%
Standard-Grade
–0.1
0.1
%
NOISE
Output Voltage Noise
f = 0.1Hz to 10Hz
µVPP
9
REF5040 (VOUT = 4.096V)
OUTPUT VOLTAGE
Output Voltage
Initial Accuracy:
VOUT
4.096
V
High-Grade
–0.05
0.05
%
Standard-Grade
–0.1
0.1
%
NOISE
Output Voltage Noise
f = 0.1Hz to 10Hz
µVPP
12
REF5045 (VOUT = 4.5V)
OUTPUT VOLTAGE
Output Voltage
Initial Accuracy:
VOUT
4.5
V
High-Grade
–0.05
0.05
%
Standard-Grade
–0.1
0.1
%
NOISE
Output Voltage Noise
f = 0.1Hz to 10Hz
µVPP
13.5
REF5050 (VOUT = 5.0V)
OUTPUT VOLTAGE
Output Voltage
Initial Accuracy:
VOUT
5.0
V
High-Grade
–0.05
0.05
%
Standard-Grade
–0.1
0.1
%
NOISE
Output Voltage Noise
f = 0.1Hz to 10Hz
µVPP
15
REF5010 (VOUT = 10.0V)
OUTPUT VOLTAGE
Output Voltage
Initial Accuracy:
VOUT
10.0
V
High-Grade
–0.05
0.05
%
Standard-Grade
–0.1
0.1
%
NOISE
Output Voltage Noise
(1)
f = 0.1Hz to 10Hz
30
µVPP
For VOUT ≤ 2.5V, the minimum supply voltage is 2.7V.
Copyright © 2007–2008, Texas Instruments Incorporated
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Product Folder Link(s): REF5010 REF5020 REF5025 REF5030 REF5040 REF5045 REF5050
3
REF5010,, REF5020
REF5025, REF5030
REF5040, REF5045, REF5050
SBOS410C – JUNE 2007 – REVISED DECEMBER 2008.................................................................................................................................................. www.ti.com
ELECTRICAL CHARACTERISTICS: ALL DEVICES
Boldface limits apply over the specified temperature range, TA = –40°C to +125°C.
At TA = +25°C, ILOAD = 0, CL = 1µF, and VIN = (VOUT + 0.2V) to 18V, unless otherwise noted.
REF50xx
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
2.5
3
ppm/°C
3
8
ppm/°C
ppm/V
OUTPUT VOLTAGE TEMPERATURE DRIFT
Output Voltage Temperature Drift
dVOUT/dT
High-Grade
Standard-Grade
LINE REGULATION
Line Regulation
dVOUT/dVIN
REF5020 (1) Only
0.1
1
All Other Devices
VIN = 2.7V to 18V
0.1
1
ppm/V
Over Temperature
0.2
1
ppm/V
20
30
ppm/mA
50
ppm/mA
LOAD REGULATION
Load Regulation
dVOUT/dILOAD
–10mA < ILOAD < +10mA, VIN = VOUT + 0.75V
Over Temperature
SHORT-CIRCUIT CURRENT
Short-Circuit Current
ISC
VOUT = 0
25
mA
TEMP PIN
Voltage Output
At TA = +25°C
Temperature Sensitivity
575
mV
2.64
mV/°C
200
µs
TURN-ON SETTLING TIME
Turn-On Settling Time
To 0.1% with CL = 1µF
POWER SUPPLY
Supply Voltage
VS
See Note
(1)
VOUT + 0.2 (1)
Quiescent Current
0.8
Over Temperature
18
V
1
mA
1.2
mA
TEMPERATURE RANGE
Specified Range
–40
+125
°C
Operating Range
–55
+125
°C
θJA
Thermal Resistance
(1)
4
MSOP-8
150
°C/W
SO-8
150
°C/W
For VOUT ≤ 2.5V, the minimal supply voltage is 2.7V.
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Copyright © 2007–2008, Texas Instruments Incorporated
Product Folder Link(s): REF5010 REF5020 REF5025 REF5030 REF5040 REF5045 REF5050
REF5010,, REF5020
REF5025, REF5030
REF5040, REF5045, REF5050
www.ti.com.................................................................................................................................................. SBOS410C – JUNE 2007 – REVISED DECEMBER 2008
TYPICAL CHARACTERISTICS
At TA = +25°C, ILOAD = 0, and VS = VOUT + 0.2V, unless otherwise noted. For VOUT ≤ 2.5V, the minimum supply voltage is 2.7V.
TEMPERATURE DRIFT
(–40°C to +125°C)
Drift (ppm/°C)
Drift (ppm/°C)
Figure 1.
Figure 2.
OUTPUT VOLTAGE
INITIAL ACCURACY
OUTPUT VOLTAGE ACCURACY
vs TEMPERATURE
7.50
8.00
6.50
7.00
5.50
6.00
4.50
5.00
3.50
4.00
2.50
3.00
1.50
2.00
0.50
1.00
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
0
Population (%)
Population (%)
TEMPERATURE DRIFT
(0°C to +85°C)
0.05
Population (%)
Output Voltage Accuracy (%)
0.04
0.03
0.02
0.01
0
-0.01
-0.02
-0.03
-0.05
0.05
0.04
0.03
0.02
0.01
0
-0.01
-0.02
-0.03
-0.04
-0.05
-0.04
-50
-25
Output Initial Accuracy (%)
Figure 3.
0
25
50
Temperature (°C)
75
100
125
Figure 4.
POWER-SUPPLY REJECTION RATIO
vs FREQUENCY
DROPOUT VOLTAGE vs LOAD CURRENT
160
0.8
140
0.7
120
0.6
Dropout Voltage (V)
PSRR (dB)
+125°C
100
80
60
40
20
+25°C
0.5
-40°C
0.4
0.3
0.2
0.1
0
0
10
100
1k
Frequency (Hz)
10k
Figure 5.
Copyright © 2007–2008, Texas Instruments Incorporated
100k
-15
-10
-5
0
5
Load Current (mA)
10
15
Figure 6.
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Product Folder Link(s): REF5010 REF5020 REF5025 REF5030 REF5040 REF5045 REF5050
5
REF5010,, REF5020
REF5025, REF5030
REF5040, REF5045, REF5050
SBOS410C – JUNE 2007 – REVISED DECEMBER 2008.................................................................................................................................................. www.ti.com
TYPICAL CHARACTERISTICS (continued)
At TA = +25°C, ILOAD = 0, and VS = VOUT + 0.2V, unless otherwise noted. For VOUT ≤ 2.5V, the minimum supply voltage is 2.7V.
REF5025 OUTPUT VOLTAGE
vs LOAD CURRENT
TEMP PIN OUTPUT VOLTAGE
vs TEMPERATURE
0.9
2.50125
TEMP Pin Output Voltage (V)
2.50100
Output Voltage (V)
2.50075
2.50050
2.50025
+25°C
2.50000
2.49975
2.49950
-40°C
2.49925
+125°C
2.49900
0.7
0.6
0.5
0.4
0.3
2.49875
-10
-5
0
Load Current (mA)
5
10
-50
-25
0
25
50
Temperature (°C)
Figure 7.
Figure 8.
QUIESCENT CURRENT
vs TEMPERATURE
LINE REGULATION
vs TEMPERATURE
1050
0.5
1000
0.4
950
0.3
Line Regulation (ppm/V)
Quiescent Current (mA)
0.8
900
850
800
750
700
650
75
100
125
75
100
125
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
600
-0.5
-50
-25
0
25
50
Temperature (°C)
75
100
125
-50
-25
0
25
50
Temperature (°C)
Figure 9.
Figure 10.
SHORT-CIRCUIT CURRENT
vs TEMPERATURE
NOISE
35
Sourcing
25
1mV/div
Short-Circuit Current (mA)
30
20
Sinking
15
10
5
0
-50
-25
0
25
50
Temperature (°C)
Figure 11.
6
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75
100
125
1s/div
Figure 12.
Copyright © 2007–2008, Texas Instruments Incorporated
Product Folder Link(s): REF5010 REF5020 REF5025 REF5030 REF5040 REF5045 REF5050
REF5010,, REF5020
REF5025, REF5030
REF5040, REF5045, REF5050
www.ti.com.................................................................................................................................................. SBOS410C – JUNE 2007 – REVISED DECEMBER 2008
TYPICAL CHARACTERISTICS (continued)
At TA = +25°C, ILOAD = 0, and VS = VOUT + 0.2V, unless otherwise noted. For VOUT ≤ 2.5V, the minimum supply voltage is 2.7V.
STARTUP
(REF5025, CL = 1µF)
STARTUP
(REF5025, CL = 10µF)
VIN
5V/div
VIN
2V/div
VOUT
VOUT
1V/div
1V/div
40ms/div
400ms/div
Figure 13.
Figure 14.
LOAD TRANSIENT
(CL = 1µF, IOUT = 1mA)
LOAD TRANSIENT
(CL = 1µF, IOUT = 10mA)
ILOAD
+1mA
ILOAD
10mA/div
+10mA
+10mA
-1mA
-1mA
1mA/div
-10mA
VOUT
VOUT
5mV/div
2mV/div
20ms/div
20ms/div
Figure 15.
Figure 16.
LOAD TRANSIENT
(CL = 10µF, IOUT = 1mA)
LOAD TRANSIENT
(CL = 10µF, IOUT = 10mA)
ILOAD
+1mA
ILOAD
10mA/div
+10mA
-10mA
-10mA
-1mA
-1mA
1mA/div
5mV/div
VOUT
VOUT
2mV/div
100ms/div
100ms/div
Figure 17.
Figure 18.
Copyright © 2007–2008, Texas Instruments Incorporated
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Product Folder Link(s): REF5010 REF5020 REF5025 REF5030 REF5040 REF5045 REF5050
7
REF5010,, REF5020
REF5025, REF5030
REF5040, REF5045, REF5050
SBOS410C – JUNE 2007 – REVISED DECEMBER 2008.................................................................................................................................................. www.ti.com
TYPICAL CHARACTERISTICS (continued)
At TA = +25°C, ILOAD = 0, and VS = VOUT + 0.2V, unless otherwise noted. For VOUT ≤ 2.5V, the minimum supply voltage is 2.7V.
LINE TRANSIENT
(CL = 1µF)
LINE TRANSIENT
(CL = 10µF)
500mV/div
VIN
VIN
500mV/div
5mV/div
VOUT
VOUT
5mV/div
20ms/div
Figure 19.
8
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100ms/div
Figure 20.
Copyright © 2007–2008, Texas Instruments Incorporated
Product Folder Link(s): REF5010 REF5020 REF5025 REF5030 REF5040 REF5045 REF5050
REF5010,, REF5020
REF5025, REF5030
REF5040, REF5045, REF5050
www.ti.com.................................................................................................................................................. SBOS410C – JUNE 2007 – REVISED DECEMBER 2008
APPLICATION INFORMATION
The REF50xx is family of low-noise, precision
bandgap voltage references that are specifically
designed for excellent initial voltage accuracy and
drift. Figure 21 shows a simplified block diagram of
the REF50xx.
VIN
REF50xx
R2
OUTPUT ADJUSTMENT USING THE TRIM/NR
PIN
(10mA
at +25°C)
VOUT
R4
10kW
R3
TRIM/NR
R5
60kW
The REF50xx family of voltage references features
extremely low dropout voltage. With the exception of
the REF5020, which has a minimum supply
requirement of 2.7V, these references can be
operated with a supply of 200mV above the output
voltage in an unloaded condition. For loaded
conditions, a typical dropout voltage versus load plot
is shown in Figure 6 of the Typical Characteristics.
R1
aT
TEMP
aT
SUPPLY VOLTAGE
1.2V
1kW
The
REF50xx
provides
a
very
accurate,
factory-trimmed voltage output. However, VOUT can
be adjusted using the trim and noise reduction pin
(TRIM/NR, pin 5). Figure 23 shows a typical circuit
that allows an output adjustment of ±15mV
+VSUPPLY
GND
REF50xx
DNC
Figure 21. REF50xx Simplified Block Diagram
VIN
TEMP
+VSUPPLY
REF50xx
CBYPASS
1mF to 10mF
TEMP
10kW
470kW
Figure 22 shows the typical connections for the
REF50xx. A supply bypass capacitor ranging
between 1µF to 10µF is recommended. A 1µF to
50µF output capacitor (CL) must be connected from
VOUT to GND. The ESR value of CL must be less than
or equal to 1.5Ω to ensure output stability. To
minimize noise, the recommended ESR of CL is
between 1Ω and 1.5Ω.
VIN
NC
VOUT
GND TRIM/NR
BASIC CONNECTIONS
DNC
DNC
DNC
NC
VOUT
GND TRIM/NR
VOUT
CL
1mF to 50mF
1kW
Figure 23. VOUT Adjustment Using the TRIM/NR
Pin
The REF50xx allows access to the bandgap through
the TRIM/NR pin. Placing a capacitor from the
TRIM/NR pin to GND (see Figure 24) in combination
with the internal R3 and R4 resistors creates a
low-pass filter. A capacitance of 1µF creates a
low-pass filter with the corner frequency between
10Hz and 20Hz. Such a filter decreases the overall
noise measured on the VOUT pin by half. Higher
capacitance results in a lower filter cutoff frequency,
further reducing output noise. Note that use of this
capacitor increases startup time.
Figure 22. Basic Connections
Copyright © 2007–2008, Texas Instruments Incorporated
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9
REF5010,, REF5020
REF5025, REF5030
REF5040, REF5045, REF5050
SBOS410C – JUNE 2007 – REVISED DECEMBER 2008.................................................................................................................................................. www.ti.com
The TEMP pin has high output impedance (see
Figure 21). Loading this pin with a low-impedance
circuit induces a measurement error; however, it does
not have any effect on VOUT accuracy. To avoid
errors caused by low-impedance loading, buffer the
TEMP pin output with a suitable low-temperature drift
op amp, such as the OPA333, OPA335, or OPA376,
as shown in Figure 25.
+VSUPPLY
REF50xx
DNC
DNC
VIN
TEMP
NC
VOUT
GND TRIM/NR
C1
1mF
+V
Figure 24. Noise Reduction Using the TRIM/NR
Pin
VTEMP
2.6mV/°C
TEMPERATURE DRIFT
The REF50xx is designed for minimal drift error,
which is defined as the change in output voltage over
temperature. The drift is calculated using the box
method, as described by the following equation:
Drift +
ǒV V
OUT
Ǔ
* V OUTMIN
Temp Range
OUTMAX
REF50xx
DNC
OPA
(1)
VIN
TEMP
DNC
NC
VOUT
GND TRIM/NR
NOTE: (1) Low drift op amp, such as the OPA333, OPA335, or OPA376.
Figure 25. Buffering the TEMP Pin Output
106(ppm)
(1)
The REF50xx features a maximum drift coefficient of
3ppm/°C for the high-grade version, and 8ppm/°C for
the standard-grade.
POWER DISSIPATION
The REF50xx family is specified to deliver current
loads of ±10mA over the specified input voltage
range. The temperature of the device increases
according to the equation:
TJ = TA + PD × θJA
TEMPERATURE MONITORING
The temperature output terminal (TEMP, pin 3)
provides a temperature-dependent voltage output
with approximately 60kΩ source impedance. As seen
in Figure 8, the output voltage follows the nominal
relationship:
VTEMP
PIN
= 509mV + 2.64 × T(°C)
This pin indicates general chip temperature, accurate
to approximately ±15°C. Although it is not generally
suitable for accurate temperature measurements, it
can be used to indicate temperature changes or for
temperature compensation of analog circuitry. A
temperature change of 30°C corresponds to an
approximate 79mV change in voltage at the TEMP
pin.
10
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Where:
TJ = Junction temperature (°C)
TA = Ambient temperature (°C)
PD = Power dissipated (W)
θJA = Junction-to-ambient thermal resistance
(°C/W)
The REF50xx junction temperature must not exceed
the absolute maximum rating of +150°C.
NOISE PERFORMANCE
Typical 0.1Hz to 10Hz voltage noise for each member
of the REF50xx family is specified in the Electrical
Characteristics: Per Device table. The noise voltage
increases with output voltage and operating
temperature. Additional filtering can be used to
improve output noise levels, although care should be
taken to ensure the output impedance does not
degrade performance.
Copyright © 2007–2008, Texas Instruments Incorporated
Product Folder Link(s): REF5010 REF5020 REF5025 REF5030 REF5040 REF5045 REF5050
REF5010,, REF5020
REF5025, REF5030
REF5040, REF5045, REF5050
www.ti.com.................................................................................................................................................. SBOS410C – JUNE 2007 – REVISED DECEMBER 2008
APPLICATION CIRCUITS
NEGATIVE REFERENCE VOLTAGE
DATA ACQUISITION
For applications requiring a negative and positive
reference voltage, the REF50xx and OPA735 can be
used to provide a dual-supply reference from a 5V
supply. Figure 26 shows the REF5025 used to
provide a 2.5V supply reference voltage. The low drift
performance of the REF50xx complements the low
offset voltage and zero drift of the OPA735 to provide
an accurate solution for split-supply applications.
Care must be taken to match the temperature
coefficients of R1 and R2.
Data acquisition systems often require stable voltage
references to maintain accuracy. The REF50xx family
features low noise, very low drift, and high initial
accuracy for high-performance data converters.
Figure 27 shows the REF5040 in a basic data
acquisition system.
+5V
Input
Signal
0V to 4V
+5V
R1
50W
ADS8326
C1
1.2nF
+5V
VDD
+IN
OPA365
-IN
REF
GND
REF5025
DNC
VIN
DNC
REF5040
+5V
NC
TEMP
VOUT
GND TRIM/NR
+2.5V
1m F
R1
10kW
VIN
VOUT
CBYPASS
1mF
GND
C2
22mF
R2
10kW
Figure 27. Basic Data Acquisition System
+5V
OPA735
-2.5V
-5V
NOTE: Bypass capacitors not shown.
Figure 26. The REF5025 and OPA735 Create
Positive and Negative Reference Voltages
Copyright © 2007–2008, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Link(s): REF5010 REF5020 REF5025 REF5030 REF5040 REF5045 REF5050
11
PACKAGE OPTION ADDENDUM
www.ti.com
18-Dec-2008
PACKAGING INFORMATION
Orderable Device
Status (1)
Package
Type
Package
Drawing
Pins Package Eco Plan (2)
Qty
REF5010AID
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
REF5010AIDGKR
PREVIEW
MSOP
DGK
8
2500
TBD
Call TI
Call TI
REF5010AIDGKT
PREVIEW
MSOP
DGK
8
250
TBD
Call TI
Call TI
REF5010AIDR
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
REF5010ID
ACTIVE
SOIC
D
8
75
REF5010IDGKR
PREVIEW
MSOP
DGK
8
REF5010IDGKT
PREVIEW
MSOP
DGK
8
REF5010IDR
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
REF5020AID
ACTIVE
SOIC
D
8
75
REF5020AIDG4
ACTIVE
SOIC
D
8
75
REF5020AIDGKR
PREVIEW
MSOP
DGK
REF5020AIDGKT
PREVIEW
MSOP
DGK
REF5020AIDR
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5020AIDRG4
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5020ID
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5020IDG4
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5020IDR
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5020IDRG4
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5025AID
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5025AIDG4
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5025AIDGKR
PREVIEW
MSOP
DGK
8
TBD
Call TI
Call TI
REF5025AIDGKT
PREVIEW
MSOP
DGK
8
TBD
Call TI
Call TI
REF5025AIDR
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5025AIDRG4
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5025ID
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5025IDG4
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5025IDR
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5025IDRG4
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
Lead/Ball Finish
MSL Peak Temp (3)
Level-2-260C-1 YEAR
CU NIPDAU
Level-2-260C-1 YEAR
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
2500
TBD
Call TI
Call TI
250
TBD
Call TI
Call TI
CU NIPDAU
Level-2-260C-1 YEAR
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
8
TBD
Call TI
Call TI
8
TBD
Call TI
Call TI
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
18-Dec-2008
Orderable Device
Status (1)
Package
Type
Package
Drawing
Pins Package Eco Plan (2)
Qty
REF5030AID
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5030AIDG4
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5030AIDGKR
PREVIEW
MSOP
DGK
8
TBD
Call TI
Call TI
REF5030AIDGKT
PREVIEW
MSOP
DGK
8
TBD
Call TI
Call TI
REF5030AIDR
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5030AIDRG4
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5030ID
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5030IDG4
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5030IDR
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5030IDRG4
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5040AID
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5040AIDG4
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5040AIDGKR
PREVIEW
MSOP
DGK
8
TBD
Call TI
Call TI
REF5040AIDGKT
PREVIEW
MSOP
DGK
8
Call TI
Call TI
REF5040AIDR
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5040AIDRG4
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5040ID
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5040IDG4
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5040IDR
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5040IDRG4
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5045AID
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5045AIDG4
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5045AIDGKR
PREVIEW
MSOP
DGK
8
TBD
Call TI
Call TI
REF5045AIDGKT
PREVIEW
MSOP
DGK
8
TBD
Call TI
Call TI
REF5045AIDR
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5045AIDRG4
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5045ID
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5045IDG4
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TBD
Addendum-Page 2
Lead/Ball Finish
MSL Peak Temp (3)
PACKAGE OPTION ADDENDUM
www.ti.com
18-Dec-2008
Orderable Device
Status (1)
Package
Type
Package
Drawing
Pins Package Eco Plan (2)
Qty
REF5045IDR
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5045IDRG4
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5050AID
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5050AIDG4
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5050AIDGKR
PREVIEW
MSOP
DGK
8
TBD
Call TI
Call TI
REF5050AIDGKT
PREVIEW
MSOP
DGK
8
Call TI
Call TI
REF5050AIDR
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5050AIDRG4
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5050ID
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5050IDG4
ACTIVE
SOIC
D
8
75
Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5050IDR
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
REF5050IDRG4
ACTIVE
SOIC
D
8
2500 Green (RoHS &
no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
TBD
Lead/Ball Finish
MSL Peak Temp (3)
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS
compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited
information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI
to Customer on an annual basis.
Addendum-Page 3
PACKAGE OPTION ADDENDUM
www.ti.com
18-Dec-2008
OTHER QUALIFIED VERSIONS OF REF5020 :
• Automotive: REF5020-Q1
NOTE: Qualified Version Definitions:
• Automotive - Q100 devices qualified for high-reliability automotive applications targeting zero defects
Addendum-Page 4
PACKAGE MATERIALS INFORMATION
www.ti.com
16-Dec-2008
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device
Package Package Pins
Type Drawing
SPQ
Reel
Reel
Diameter Width
(mm) W1 (mm)
A0 (mm)
B0 (mm)
K0 (mm)
P1
(mm)
W
Pin1
(mm) Quadrant
REF5010IDR
SOIC
D
8
2500
330.0
12.4
6.4
5.2
2.1
8.0
12.0
Q1
REF5020AIDR
SOIC
D
8
2500
330.0
12.4
6.4
5.2
2.1
8.0
12.0
Q1
REF5020IDR
SOIC
D
8
2500
330.0
12.4
6.4
5.2
2.1
8.0
12.0
Q1
REF5025AIDR
SOIC
D
8
2500
330.0
12.4
6.4
5.2
2.1
8.0
12.0
Q1
REF5025IDR
SOIC
D
8
2500
330.0
12.4
6.4
5.2
2.1
8.0
12.0
Q1
REF5030AIDR
SOIC
D
8
2500
330.0
12.4
6.4
5.2
2.1
8.0
12.0
Q1
REF5030IDR
SOIC
D
8
2500
330.0
12.4
6.4
5.2
2.1
8.0
12.0
Q1
REF5040AIDR
SOIC
D
8
2500
330.0
12.4
6.4
5.2
2.1
8.0
12.0
Q1
REF5040IDR
SOIC
D
8
2500
330.0
12.4
6.4
5.2
2.1
8.0
12.0
Q1
REF5045AIDR
SOIC
D
8
2500
330.0
12.4
6.4
5.2
2.1
8.0
12.0
Q1
REF5045IDR
SOIC
D
8
2500
330.0
12.4
6.4
5.2
2.1
8.0
12.0
Q1
REF5050AIDR
SOIC
D
8
2500
330.0
12.4
6.4
5.2
2.1
8.0
12.0
Q1
REF5050IDR
SOIC
D
8
2500
330.0
12.4
6.4
5.2
2.1
8.0
12.0
Q1
Pack Materials-Page 1
PACKAGE MATERIALS INFORMATION
www.ti.com
16-Dec-2008
*All dimensions are nominal
Device
Package Type
Package Drawing
Pins
SPQ
Length (mm)
Width (mm)
Height (mm)
REF5010IDR
SOIC
D
8
2500
346.0
346.0
29.0
REF5020AIDR
SOIC
D
8
2500
346.0
346.0
29.0
REF5020IDR
SOIC
D
8
2500
346.0
346.0
29.0
REF5025AIDR
SOIC
D
8
2500
346.0
346.0
29.0
REF5025IDR
SOIC
D
8
2500
346.0
346.0
29.0
REF5030AIDR
SOIC
D
8
2500
346.0
346.0
29.0
REF5030IDR
SOIC
D
8
2500
346.0
346.0
29.0
REF5040AIDR
SOIC
D
8
2500
346.0
346.0
29.0
REF5040IDR
SOIC
D
8
2500
346.0
346.0
29.0
REF5045AIDR
SOIC
D
8
2500
346.0
346.0
29.0
REF5045IDR
SOIC
D
8
2500
346.0
346.0
29.0
REF5050AIDR
SOIC
D
8
2500
346.0
346.0
29.0
REF5050IDR
SOIC
D
8
2500
346.0
346.0
29.0
Pack Materials-Page 2
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