REF5040ID [TI]

Low-Noise, Very Low Drift, Precision VOLTAGE REFERENCE; 低噪声,极低漂移,高精度电压基准
REF5040ID
型号: REF5040ID
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

Low-Noise, Very Low Drift, Precision VOLTAGE REFERENCE
低噪声,极低漂移,高精度电压基准

电源电路 参考电压源 光电二极管 PC
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REF5010, REF5020  
REF5025, REF5030  
REF5040, REF5045, REF5050  
www.ti.com .................................................................................................................................................. SBOS410CJUNE 2007REVISED DECEMBER 2008  
Low-Noise, Very Low Drift, Precision  
VOLTAGE REFERENCE  
1
FEATURES  
DESCRIPTION  
2
LOW TEMPERATURE DRIFT:  
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.  
High-Grade: 3ppm/°C (max)  
Standard-Grade: 8ppm/°C (max)  
HIGH ACCURACY:  
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.  
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  
Each reference voltage is available in both standard-  
and 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  
MODEL  
REF5020  
REF5025  
REF5030  
REF5040  
REF5045  
REF5050  
REF5010  
OUTPUT VOLTAGE  
2.048V  
2.5V  
3.0V  
4.096V  
4.5V  
5.0V  
10.0V  
+5V  
+5V  
Input  
Signal  
0V to 4V  
R1  
50W  
DNC(1)  
NC(2)  
DNC(1)  
VIN  
1
2
3
4
8
7
6
5
VDD  
OPA365  
+IN  
ADS8326  
REF50xx  
C1  
1.2nF  
TEMP  
GND  
VOUT  
-IN  
REF  
GND  
TRIM/NR  
SO-8, MSOP-8(3)  
REF5040  
VIN  
VOUT  
+5V  
CBYPASS  
NOTES:(1) DNC = Do not connect.  
(2) NC = No internal connection.  
C2  
1mF  
22mF  
GND  
(3) Contact a TI sales representative for information  
regarding MSOP-8 (DGK) package availability.  
1
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.  
2
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  
SBOS410CJUNE 2007REVISED 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  
STANDARD GRADE (8ppm, 0.1%)  
SO-8  
MSOP-8(2)  
SO-8  
D
DGK  
D
REF5020  
R50A  
REF5020A  
REF5025A  
REF5030A  
REF5040A  
REF5045A  
REF5050A  
2.048V  
2.5V  
REF5025  
R50B  
MSOP-8(2)  
DGK  
D
SO-8  
REF5030  
R50C  
3.0V  
MSOP-8(2)  
SO-8  
DGK  
D
REF5040  
R50D  
4.096V  
4.5V  
MSOP-8(2)  
DGK  
D
SO-8  
REF5045  
R50E  
MSOP-8(2)  
SO-8  
DGK  
D
REF5050  
R50F  
5.0V  
MSOP-8(2)  
DGK  
D
SO-8  
REF5010  
R50G  
REF5010A  
HIGH GRADE (3ppm, 0.05%)  
REF5020I  
10.0V  
MSOP-8(2)  
DGK  
SO-8  
MSOP-8(2)  
SO-8  
D
DGK  
D
REF5020  
R50A  
2.048V  
2.5V  
REF5025  
R50B  
REF5025I  
REF5030I  
REF5040I  
REF5045I  
REF5050I  
REF5010I  
MSOP-8(2)  
DGK  
D
SO-8  
REF5030  
R50C  
3.0V  
MSOP-8(2)  
SO-8  
DGK  
D
REF5040  
R50D  
4.096V  
4.5V  
MSOP-8(2)  
DGK  
D
SO-8  
REF5045  
R50E  
MSOP-8(2)  
SO-8  
DGK  
D
REF5050  
R50F  
5.0V  
MSOP-8(2)  
DGK  
D
SO-8  
REF5010  
R50G  
10.0V  
MSOP-8(2)  
DGK  
(1) 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.  
(2) Contact a TI sales representative for information regarding MSOP-8 (DGK) package availability.  
ABSOLUTE MAXIMUM RATINGS(1)  
PARAMETER  
REF50xx  
+18  
UNIT  
V
Input Voltage  
Output Short-Circuit  
30  
mA  
°C  
°C  
°C  
V
Operating Temperature Range  
Storage Temperature Range  
Junction Temperature (TJ max)  
–55 to +125  
–55 to +150  
+150  
Human Body Model (HBM)  
Charged Device Model (CDM)  
3000  
ESD Rating  
1000  
V
(1) 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
Submit Documentation Feedback  
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 .................................................................................................................................................. SBOS410CJUNE 2007REVISED 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  
VOUT  
VOUT  
VOUT  
VOUT  
VOUT  
VOUT  
VOUT  
2.7V < VIN < 18V  
2.048  
V
Initial Accuracy:  
High-Grade  
–0.05  
–0.1  
0.05  
0.1  
%
%
Standard-Grade  
NOISE  
Output Voltage Noise  
f = 0.1Hz to 10Hz  
6
µVPP  
REF5025 (VOUT = 2.5V)  
OUTPUT VOLTAGE  
Output Voltage  
2.5  
V
Initial Accuracy:  
High-Grade  
–0.05  
–0.1  
0.05  
0.1  
%
%
Standard-Grade  
NOISE  
Output Voltage Noise  
f = 0.1Hz to 10Hz  
7.5  
3.0  
µVPP  
REF5030 (VOUT = 3.0V)  
OUTPUT VOLTAGE  
Output Voltage  
V
Initial Accuracy:  
High-Grade  
–0.05  
–0.1  
0.05  
0.1  
%
%
Standard-Grade  
NOISE  
Output Voltage Noise  
f = 0.1Hz to 10Hz  
9
µVPP  
REF5040 (VOUT = 4.096V)  
OUTPUT VOLTAGE  
Output Voltage  
4.096  
V
Initial Accuracy:  
High-Grade  
–0.05  
–0.1  
0.05  
0.1  
%
%
Standard-Grade  
NOISE  
Output Voltage Noise  
f = 0.1Hz to 10Hz  
12  
µVPP  
REF5045 (VOUT = 4.5V)  
OUTPUT VOLTAGE  
Output Voltage  
4.5  
V
Initial Accuracy:  
High-Grade  
–0.05  
–0.1  
0.05  
0.1  
%
%
Standard-Grade  
NOISE  
Output Voltage Noise  
f = 0.1Hz to 10Hz  
13.5  
5.0  
µVPP  
REF5050 (VOUT = 5.0V)  
OUTPUT VOLTAGE  
Output Voltage  
V
Initial Accuracy:  
High-Grade  
–0.05  
–0.1  
0.05  
0.1  
%
%
Standard-Grade  
NOISE  
Output Voltage Noise  
f = 0.1Hz to 10Hz  
15  
µVPP  
REF5010 (VOUT = 10.0V)  
OUTPUT VOLTAGE  
Output Voltage  
10.0  
V
Initial Accuracy:  
High-Grade  
–0.05  
–0.1  
0.05  
0.1  
%
%
Standard-Grade  
NOISE  
Output Voltage Noise  
f = 0.1Hz to 10Hz  
30  
µVPP  
(1) For VOUT 2.5V, the minimum supply voltage is 2.7V.  
Copyright © 2007–2008, Texas Instruments Incorporated  
Submit Documentation Feedback  
3
Product Folder Link(s): REF5010 REF5020 REF5025 REF5030 REF5040 REF5045 REF5050  
 
REF5010, REF5020  
REF5025, REF5030  
REF5040, REF5045, REF5050  
SBOS410CJUNE 2007REVISED 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  
OUTPUT VOLTAGE TEMPERATURE DRIFT  
Output Voltage Temperature Drift  
High-Grade  
CONDITIONS  
MIN  
TYP  
MAX  
UNIT  
dVOUT/dT  
2.5  
3
3
8
ppm/°C  
ppm/°C  
Standard-Grade  
LINE REGULATION  
Line Regulation  
dVOUT/dVIN  
REF5020(1) Only  
All Other Devices  
Over Temperature  
LOAD REGULATION  
Load Regulation  
VIN = 2.7V to 18V  
0.1  
0.1  
0.2  
1
1
1
ppm/V  
ppm/V  
ppm/V  
dVOUT/dILOAD  
–10mA < ILOAD < +10mA, VIN = VOUT + 0.75V  
20  
25  
30  
ppm/mA  
Over Temperature  
SHORT-CIRCUIT CURRENT  
Short-Circuit Current  
TEMP PIN  
50  
ppm/mA  
ISC  
VOUT = 0  
mA  
Voltage Output  
At TA = +25°C  
575  
mV  
Temperature Sensitivity  
TURN-ON SETTLING TIME  
Turn-On Settling Time  
POWER SUPPLY  
Supply Voltage  
2.64  
mV/°C  
To 0.1% with CL = 1µF  
200  
0.8  
µs  
(1)  
VS  
See Note  
VOUT + 0.2(1)  
18  
1
V
Quiescent Current  
Over Temperature  
TEMPERATURE RANGE  
Specified Range  
mA  
mA  
1.2  
–40  
–55  
+125  
+125  
°C  
°C  
Operating Range  
Thermal Resistance  
MSOP-8  
θJA  
150  
150  
°C/W  
°C/W  
SO-8  
(1) For VOUT 2.5V, the minimal supply voltage is 2.7V.  
4
Submit Documentation Feedback  
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 .................................................................................................................................................. SBOS410CJUNE 2007REVISED 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  
(0°C to +85°C)  
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  
0.05  
0.04  
0.03  
0.02  
0.01  
0
-0.01  
-0.02  
-0.03  
-0.04  
-0.05  
-50  
-25  
0
25  
50  
75  
100  
125  
Temperature (°C)  
Output Initial Accuracy (%)  
Figure 3.  
Figure 4.  
POWER-SUPPLY REJECTION RATIO  
vs FREQUENCY  
DROPOUT VOLTAGE vs LOAD CURRENT  
160  
140  
120  
100  
80  
0.8  
0.7  
0.6  
0.5  
0.4  
0.3  
0.2  
0.1  
0
+125°C  
+25°C  
-40°C  
60  
40  
20  
0
10  
100  
1k  
10k  
100k  
-15  
-10  
-5  
0
5
10  
15  
Frequency (Hz)  
Load Current (mA)  
Figure 5.  
Figure 6.  
Copyright © 2007–2008, Texas Instruments Incorporated  
Submit Documentation Feedback  
5
Product Folder Link(s): REF5010 REF5020 REF5025 REF5030 REF5040 REF5045 REF5050  
 
REF5010, REF5020  
REF5025, REF5030  
REF5040, REF5045, REF5050  
SBOS410CJUNE 2007REVISED 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  
2.50125  
2.50100  
2.50075  
2.50050  
2.50025  
2.50000  
2.49975  
2.49950  
2.49925  
2.49900  
2.49875  
0.9  
0.8  
0.7  
0.6  
0.5  
0.4  
0.3  
+25°C  
-40°C  
+125°C  
-10  
-5  
0
5
10  
-50  
-25  
0
25  
50  
75  
100  
125  
Load Current (mA)  
Temperature (°C)  
Figure 7.  
Figure 8.  
QUIESCENT CURRENT  
vs TEMPERATURE  
LINE REGULATION  
vs TEMPERATURE  
1050  
1000  
950  
900  
850  
800  
750  
700  
650  
600  
0.5  
0.4  
0.3  
0.2  
0.1  
0
-0.1  
-0.2  
-0.3  
-0.4  
-0.5  
-50  
-25  
0
25  
50  
75  
100  
125  
-50  
-25  
0
25  
50  
75  
100  
125  
Temperature (°C)  
Temperature (°C)  
Figure 9.  
Figure 10.  
SHORT-CIRCUIT CURRENT  
vs TEMPERATURE  
NOISE  
35  
30  
25  
20  
15  
10  
5
Sourcing  
Sinking  
0
1s/div  
-50  
-25  
0
25  
50  
75  
100  
125  
Temperature (°C)  
Figure 11.  
Figure 12.  
6
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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 .................................................................................................................................................. SBOS410CJUNE 2007REVISED 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  
1V/div  
VIN  
2V/div  
1V/div  
VOUT  
VOUT  
40ms/div  
400ms/div  
Figure 13.  
Figure 14.  
LOAD TRANSIENT  
(CL = 1µF, IOUT = 1mA)  
LOAD TRANSIENT  
(CL = 1µF, IOUT = 10mA)  
ILOAD  
+10mA  
+1mA  
+10mA  
ILOAD  
10mA/div  
-1mA  
-1mA  
1mA/div  
5mV/div  
-10mA  
VOUT  
VOUT  
2mV/div  
20ms/div  
20ms/div  
Figure 15.  
Figure 16.  
LOAD TRANSIENT  
(CL = 10µF, IOUT = 1mA)  
LOAD TRANSIENT  
(CL = 10µF, IOUT = 10mA)  
ILOAD  
+1mA  
+10mA  
ILOAD  
-10mA  
-10mA  
10mA/div  
2mV/div  
-1mA  
-1mA  
1mA/div  
5mV/div  
VOUT  
VOUT  
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  
REF5010, REF5020  
REF5025, REF5030  
REF5040, REF5045, REF5050  
SBOS410CJUNE 2007REVISED 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  
LINE TRANSIENT  
(CL = 1µF)  
(CL = 10µF)  
VIN  
500mV/div  
5mV/div  
VIN  
500mV/div  
5mV/div  
VOUT  
VOUT  
20ms/div  
100ms/div  
Figure 19.  
Figure 20.  
8
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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 .................................................................................................................................................. SBOS410CJUNE 2007REVISED DECEMBER 2008  
APPLICATION INFORMATION  
The REF50xx is family of low-noise, precision  
SUPPLY VOLTAGE  
bandgap voltage references that are specifically  
designed for excellent initial voltage accuracy and  
drift. Figure 21 shows a simplified block diagram of  
the REF50xx.  
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.  
VIN  
REF50xx  
R2  
R1  
aT  
(10mA  
at +25°C)  
OUTPUT ADJUSTMENT USING THE TRIM/NR  
PIN  
The  
REF50xx  
provides  
a
very  
accurate,  
VOUT  
R4  
TEMP  
aT  
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  
10kW  
R3  
TRIM/NR  
1.2V  
1kW  
R5  
60kW  
+VSUPPLY  
GND  
REF50xx  
DNC  
VIN  
DNC  
Figure 21. REF50xx Simplified Block Diagram  
NC  
VOUT  
TEMP  
GND TRIM/NR  
10kW  
1kW  
BASIC CONNECTIONS  
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 1.5to ensure output stability. To  
minimize noise, the recommended ESR of CL is  
between 1and 1.5.  
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.  
+VSUPPLY  
REF50xx  
DNC  
VIN  
DNC  
NC  
CBYPASS  
VOUT  
VOUT  
TEMP  
1mF to 10mF  
CL  
1mF to 50mF  
GND TRIM/NR  
Figure 22. Basic Connections  
Copyright © 2007–2008, Texas Instruments Incorporated  
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Product Folder Link(s): REF5010 REF5020 REF5025 REF5030 REF5040 REF5045 REF5050  
 
 
 
REF5010, REF5020  
REF5025, REF5030  
REF5040, REF5045, REF5050  
SBOS410CJUNE 2007REVISED DECEMBER 2008.................................................................................................................................................. www.ti.com  
The TEMP pin has high output impedance (see  
+VSUPPLY  
Figure 21). Loading this pin with a low-impedance  
circuit induces a measurement error; however, it does  
REF50xx  
not have any effect on VOUT accuracy. To avoid  
DNC  
VIN  
DNC  
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.  
NC  
VOUT  
TEMP  
GND TRIM/NR  
C1  
1mF  
+V  
Figure 24. Noise Reduction Using the TRIM/NR  
Pin  
REF50xx  
DNC  
VIN  
DNC  
VTEMP  
OPA(1)  
NC  
2.6mV/°C  
VOUT  
TEMP  
TEMPERATURE DRIFT  
GND TRIM/NR  
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:  
NOTE: (1) Low drift op amp, such as the OPA333, OPA335, or OPA376.  
Figure 25. Buffering the TEMP Pin Output  
POWER DISSIPATION  
VOUTMAX * VOUTMIN  
6
Drift + ǒ  
Ǔ
  10 (ppm)  
VOUT   Temp Range  
(1)  
The REF50xx features a maximum drift coefficient of  
3ppm/°C for the high-grade version, and 8ppm/°C for  
the standard-grade.  
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  
Where:  
TJ = Junction temperature (°C)  
TA = Ambient temperature (°C)  
PD = Power dissipated (W)  
The temperature output terminal (TEMP, pin 3)  
provides a temperature-dependent voltage output  
with approximately 60ksource impedance. As seen  
in Figure 8, the output voltage follows the nominal  
relationship:  
θJA  
= Junction-to-ambient thermal resistance  
(°C/W)  
VTEMP PIN = 509mV + 2.64 × T(°C)  
The REF50xx junction temperature must not exceed  
the absolute maximum rating of +150°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.  
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.  
10  
Submit Documentation Feedback  
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 .................................................................................................................................................. SBOS410CJUNE 2007REVISED DECEMBER 2008  
APPLICATION CIRCUITS  
DATA ACQUISITION  
NEGATIVE REFERENCE VOLTAGE  
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.  
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.  
+5V  
+5V  
Input  
Signal  
0V to 4V  
R1  
50W  
VDD  
OPA365  
+IN  
ADS8326  
C1  
1.2nF  
+5V  
-IN  
REF  
GND  
REF5025  
DNC  
VIN  
DNC  
REF5040  
VIN  
VOUT  
+5V  
NC  
CBYPASS  
VOUT  
+2.5V  
TEMP  
C2  
1mF  
22mF  
1mF  
GND TRIM/NR  
GND  
R1  
10kW  
R2  
10kW  
Figure 27. Basic Data Acquisition System  
+5V  
-2.5V  
OPA735  
-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  
11  
Product Folder Link(s): REF5010 REF5020 REF5025 REF5030 REF5040 REF5045 REF5050  
 
 
PACKAGE OPTION ADDENDUM  
www.ti.com  
18-Dec-2008  
PACKAGING INFORMATION  
Orderable Device  
Status (1)  
Package Package  
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)  
Qty  
Type  
Drawing  
REF5010AID  
ACTIVE  
SOIC  
D
8
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5010AIDGKR  
REF5010AIDGKT  
REF5010AIDR  
PREVIEW  
PREVIEW  
ACTIVE  
MSOP  
MSOP  
SOIC  
DGK  
DGK  
D
8
8
8
2500  
250  
TBD  
TBD  
Call TI  
Call TI  
Call TI  
Call TI  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5010ID  
ACTIVE  
SOIC  
D
8
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5010IDGKR  
REF5010IDGKT  
REF5010IDR  
PREVIEW  
PREVIEW  
ACTIVE  
MSOP  
MSOP  
SOIC  
DGK  
DGK  
D
8
8
8
2500  
250  
TBD  
TBD  
Call TI  
Call TI  
Call TI  
Call TI  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5020AID  
ACTIVE  
ACTIVE  
SOIC  
SOIC  
D
D
8
8
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5020AIDG4  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5020AIDGKR  
REF5020AIDGKT  
REF5020AIDR  
PREVIEW  
PREVIEW  
ACTIVE  
MSOP  
MSOP  
SOIC  
DGK  
DGK  
D
8
8
8
TBD  
TBD  
Call TI  
Call TI  
Call TI  
Call TI  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5020AIDRG4  
REF5020ID  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
D
D
D
D
D
D
D
8
8
8
8
8
8
8
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5020IDG4  
REF5020IDR  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5020IDRG4  
REF5025AID  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5025AIDG4  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5025AIDGKR  
REF5025AIDGKT  
REF5025AIDR  
PREVIEW  
PREVIEW  
ACTIVE  
MSOP  
MSOP  
SOIC  
DGK  
DGK  
D
8
8
8
TBD  
TBD  
Call TI  
Call TI  
Call TI  
Call TI  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5025AIDRG4  
REF5025ID  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
D
D
D
D
D
8
8
8
8
8
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5025IDG4  
REF5025IDR  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5025IDRG4  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
Addendum-Page 1  
PACKAGE OPTION ADDENDUM  
www.ti.com  
18-Dec-2008  
Orderable Device  
REF5030AID  
Status (1)  
ACTIVE  
ACTIVE  
Package Package  
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)  
Qty  
Type  
Drawing  
SOIC  
D
8
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5030AIDG4  
SOIC  
D
8
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5030AIDGKR  
REF5030AIDGKT  
REF5030AIDR  
PREVIEW  
PREVIEW  
ACTIVE  
MSOP  
MSOP  
SOIC  
DGK  
DGK  
D
8
8
8
TBD  
TBD  
Call TI  
Call TI  
Call TI  
Call TI  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5030AIDRG4  
REF5030ID  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
D
D
D
D
D
D
D
8
8
8
8
8
8
8
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5030IDG4  
REF5030IDR  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5030IDRG4  
REF5040AID  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5040AIDG4  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5040AIDGKR  
REF5040AIDGKT  
REF5040AIDR  
PREVIEW  
PREVIEW  
ACTIVE  
MSOP  
MSOP  
SOIC  
DGK  
DGK  
D
8
8
8
TBD  
TBD  
Call TI  
Call TI  
Call TI  
Call TI  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5040AIDRG4  
REF5040ID  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
D
D
D
D
D
D
D
8
8
8
8
8
8
8
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5040IDG4  
REF5040IDR  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5040IDRG4  
REF5045AID  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5045AIDG4  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5045AIDGKR  
REF5045AIDGKT  
REF5045AIDR  
PREVIEW  
PREVIEW  
ACTIVE  
MSOP  
MSOP  
SOIC  
DGK  
DGK  
D
8
8
8
TBD  
TBD  
Call TI  
Call TI  
Call TI  
Call TI  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5045AIDRG4  
REF5045ID  
ACTIVE  
ACTIVE  
ACTIVE  
SOIC  
SOIC  
SOIC  
D
D
D
8
8
8
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5045IDG4  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
Addendum-Page 2  
PACKAGE OPTION ADDENDUM  
www.ti.com  
18-Dec-2008  
Orderable Device  
REF5045IDR  
Status (1)  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
Package Package  
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)  
Qty  
Type  
Drawing  
SOIC  
D
8
8
8
8
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5045IDRG4  
REF5050AID  
SOIC  
SOIC  
SOIC  
D
D
D
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5050AIDG4  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5050AIDGKR  
REF5050AIDGKT  
REF5050AIDR  
PREVIEW  
PREVIEW  
ACTIVE  
MSOP  
MSOP  
SOIC  
DGK  
DGK  
D
8
8
8
TBD  
TBD  
Call TI  
Call TI  
Call TI  
Call TI  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5050AIDRG4  
REF5050ID  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
D
D
D
D
D
8
8
8
8
8
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5050IDG4  
REF5050IDR  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
REF5050IDRG4  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
(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  
A0 (mm)  
B0 (mm)  
K0 (mm)  
P1  
W
Pin1  
Diameter Width  
(mm) W1 (mm)  
(mm) (mm) Quadrant  
REF5010IDR  
REF5020AIDR  
REF5020IDR  
REF5025AIDR  
REF5025IDR  
REF5030AIDR  
REF5030IDR  
REF5040AIDR  
REF5040IDR  
REF5045AIDR  
REF5045IDR  
REF5050AIDR  
REF5050IDR  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
D
D
D
D
D
D
D
D
D
D
D
D
D
8
8
8
8
8
8
8
8
8
8
8
8
8
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
330.0  
330.0  
330.0  
330.0  
330.0  
330.0  
330.0  
330.0  
330.0  
330.0  
330.0  
330.0  
330.0  
12.4  
12.4  
12.4  
12.4  
12.4  
12.4  
12.4  
12.4  
12.4  
12.4  
12.4  
12.4  
12.4  
6.4  
6.4  
6.4  
6.4  
6.4  
6.4  
6.4  
6.4  
6.4  
6.4  
6.4  
6.4  
6.4  
5.2  
5.2  
5.2  
5.2  
5.2  
5.2  
5.2  
5.2  
5.2  
5.2  
5.2  
5.2  
5.2  
2.1  
2.1  
2.1  
2.1  
2.1  
2.1  
2.1  
2.1  
2.1  
2.1  
2.1  
2.1  
2.1  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
8.0  
12.0  
12.0  
12.0  
12.0  
12.0  
12.0  
12.0  
12.0  
12.0  
12.0  
12.0  
12.0  
12.0  
Q1  
Q1  
Q1  
Q1  
Q1  
Q1  
Q1  
Q1  
Q1  
Q1  
Q1  
Q1  
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  
REF5020AIDR  
REF5020IDR  
REF5025AIDR  
REF5025IDR  
REF5030AIDR  
REF5030IDR  
REF5040AIDR  
REF5040IDR  
REF5045AIDR  
REF5045IDR  
REF5050AIDR  
REF5050IDR  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
D
D
D
D
D
D
D
D
D
D
D
D
D
8
8
8
8
8
8
8
8
8
8
8
8
8
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
2500  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
346.0  
29.0  
29.0  
29.0  
29.0  
29.0  
29.0  
29.0  
29.0  
29.0  
29.0  
29.0  
29.0  
29.0  
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