Texas Instruments REF5020, REF5050I Datasheet

ADS8326

REF5040

REF

V

OUT

GND

+IN

-IN

V

IN

+5V

OPA365

Input

Signal

0Vto4V

+5V

+5V

V

DD

GND

C

BYPASS

1 Fm

R

1

50W

C

1

1.2nF

C

2

22 Fm

1

2

3

4

8

7

6

5

DNC

(1)

NC

(2)

TRIM

DNC

(1)

V

IN

TEMP

GND

V

OUT

REF50xx

SO-8,MSOP-8

(3)

(1)DNC=Donotconnect.
(2)NC=Nointernalconnection.
(3)MSOP-8packageavailableQ3,2007.

NOTES:

www.ti.com

Low-Noise, Very Low Drift, Precision

VOLTAGE REFERENCE

1

FEATURES

2

• 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: 3 μ V

• HIGH OUTPUT CURRENT: ± 10mA

• TEMPERATURE RANGE: – 40 ° C to +125 ° C

APPLICATIONS

• 16-BIT DATA ACQUISITION SYSTEMS

• ATE EQUIPMENT

• INDUSTRIAL PROCESS CONTROL

• MEDICAL INSTRUMENTATION

• OPTICAL CONTROL SYSTEMS

• PRECISION INSTRUMENTATION

/V

PP

REF5020 , , REF5025
REF5030 , REF5040
REF5045 , REF5050

SBOS410 – JUNE 2007

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 standard­and 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 OUTPUT VOLTAGE

REF5020 2.048V
REF5025 2.5V
REF5030 3.0V
REF5040 4.096V
REF5045 4.5V
REF5050 5.0V

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.

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.

Copyright © 2007, Texas Instruments Incorporated

www.ti.com

REF5020 , , REF5025
REF5030 , REF5040
REF5045 , REF5050

SBOS410 – JUNE 2007

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

PRODUCT OUTPUT VOLTAGE PACKAGE-LEAD PACKAGE DESIGNATOR PACKAGE MARKING

STANDARD GRADE (8ppm, 0.1%)

REF5020A 2.048V

REF5025A 2.5V

REF5030A 3.0V

REF5040A 4.096V

REF5045A 4.5V

REF5050A 5.0V

HIGH GRADE (3ppm, 0.05%)

REF5020I 2.048V

REF5025I 2.5V

REF5030I 3.0V

REF5040I 4.096V

REF5045I 4.5V

REF5050I 5.0V

SO-8 D REF5020

(2)

MSOP-8

SO-8 D REF5025

(2)

MSOP-8

SO-8 D REF5030

(2)

MSOP-8

SO-8 D REF5040

(2)

MSOP-8

SO-8 D REF5045

(2)

MSOP-8

SO-8 D REF5050

(2)

MSOP-8

SO-8 D REF5020

(2)

MSOP-8

SO-8 D REF5025

(2)

MSOP-8

SO-8 D REF5030

(2)

MSOP-8

SO-8 D REF5040

(2)

MSOP-8

SO-8 D REF5045

(2)

MSOP-8

SO-8 D REF5050

(2)

MSOP-8

(1)

DGK R50A

DGK R50B

DGK R50C

DGK R50D

DGK R50E

DGK R50F

DGK R50A

DGK R50B

DGK R50C

DGK R50D

DGK R50E

DGK R50F

(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) MSOP-8 (DGK) package available Q3, 2007.

ABSOLUTE MAXIMUM RATINGS

(1)

PARAMETER REF50xx UNIT

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 (T

ESD Rating

max) +150 ° C

J

Human Body Model (HBM) 3000 V
Charged Device Model (CDM) 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

Copyright © 2007, Texas Instruments Incorporated

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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, TA= – 40 ° C to +125 ° C.

At TA= +25 ° C, I

OUTPUT VOLTAGE

Output Voltage V
Initial Accuracy: High-Grade – 0.05 0.05 %

NOISE

Output Voltage Noise f = 0.1Hz to 10Hz 6 μ V

OUTPUT VOLTAGE

Output Voltage V
Initial Accuracy: High-Grade – 0.05 0.05 %

NOISE

Output Voltage Noise f = 0.1Hz to 10Hz 7.5 μ V

OUTPUT VOLTAGE

Output Voltage V
Initial Accuracy: High-Grade – 0.05 0.05 %

NOISE

Output Voltage Noise f = 0.1Hz to 10Hz 9 μ V

OUTPUT VOLTAGE

Output Voltage V
Initial Accuracy: High-Grade – 0.05 0.05 %

NOISE

Output Voltage Noise f = 0.1Hz to 10Hz 12 μ V

OUTPUT VOLTAGE

Output Voltage V
Initial Accuracy: High-Grade – 0.05 0.05 %

NOISE

Output Voltage Noise f = 0.1Hz to 10Hz 13.5 μ V

OUTPUT VOLTAGE

Output Voltage V
Initial Accuracy: High-Grade – 0.05 0.05 %

NOISE

Output Voltage Noise f = 0.1Hz to 10Hz 15 μ V

(1) For V

≤ 2.5V, the minimum supply voltage is 2.7V.

OUT

= 0, CL= 1 μ F, and V

LOAD

= (V

IN

+ 0.2V) to 18V, unless otherwise noted.

OUT

PER DEVICE

PARAMETER CONDITIONS MIN TYP MAX UNIT

REF5020 (V

OUT

= 2.048V)

OUT

2.7V < VIN< 18V 2.048 V

(1)

Standard-Grade – 0.1 0.1 %

REF5025 (V

OUT

= 2.5V)

OUT

2.5 V

Standard-Grade – 0.1 0.1 %

REF5030 (V

OUT

= 3.0V)

OUT

3.0 V

Standard-Grade – 0.1 0.1 %

REF5040 (V

OUT

= 4.096V)

OUT

4.096 V

Standard-Grade – 0.1 0.1 %

REF5045 (V

OUT

= 4.5V)

OUT

4.5 V

Standard-Grade – 0.1 0.1 %

REF5050 (V

OUT

= 5.0V)

OUT

5.0 V

Standard-Grade – 0.1 0.1 %

PP

PP

PP

PP

PP

PP

Copyright © 2007, Texas Instruments Incorporated

3

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: ALL DEVICES

Boldface limits apply over the specified temperature range, TA= – 40 ° C to +125 ° C.

At TA= +25 ° C, I

OUTPUT VOLTAGE TEMPERATURE DRIFT
Output Voltage Temperature Drift dV

High-Grade 2.5 3 ppm/ ° C
Standard-Grade 3 8 ppm/ ° C

LINE REGULATION

Line Regulation dV

REF5020
All Other Devices 0.1 1 ppm/V

Over Temperature 0.2 1 ppm/V

LOAD REGULATION

Load Regulation dV

Over Temperature 50 ppm/mA

SHORT-CIRCUIT CURRENT

Short-Circuit Current I

TEMP PIN

Voltage Output At TA= +25 ° C 575 mV

Temperature Sensitivity 2.64 mV/ ° C
TURN-ON SETTLING TIME

Turn-On Settling Time To 0.1% with CL= 1 μ F 200 μ s

POWER SUPPLY

Supply Voltage V
Quiescent Current 0.8 1 mA

Over Temperature 1.2 mA
TEMPERATURE RANGE

Specified Range – 40 +125 ° C
Operating Range – 55 +125 ° C
Thermal Resistance θ

MSOP-8 150 ° C/W
SO-8 150 ° C/W

(1) For V

(1)

Only VIN= 2.7V to 18V 0.1 1 ppm/V

≤ 2.5V, the minimal supply voltage is 2.7V.

OUT

= 0, CL= 1 μ F, and V

LOAD

PARAMETER CONDITIONS MIN TYP MAX UNIT

= (V

IN

/dT

OUT

/dV

OUT

IN

/d

OUT

ILOAD

SC

S

JA

+ 0.2V) to 18V, unless otherwise noted.

OUT

– 10mA < I

< +10mA, VIN= V

LOAD

See Note

V

= 0 25 mA

OUT

REF50xx

+ 0.75V 20 30 ppm/mA

OUT

(1)

V

(1)

+ 0.2

OUT

18 V

4

Copyright © 2007, Texas Instruments Incorporated

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Product Folder Link(s): REF5020 REF5025 REF5030 REF5040 REF5045 REF5050

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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)°

P

opulation(%)

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

8.00

Drift(ppm/ C)°

Population(%)

-50 -25

Temperature( C)°

0.05

0.04

0.03

0.02

0.01

0

-0.01

-0.02

-0.03

-0.04

-0.05

OutputVoltageAccuracy(%)

1250 25 50 75 100

-0.05

-0.04

-

0.03

-0.02

-0.01

0

0.01

0.02

0.03

0.04

0.05

Drift(ppm/ C)°

Population(%)

10

Frequency(Hz)

160

140

120

100

80

60

40

20

0

PSRR(dB)

100k100 1k 10k

-15 -10 -5

LoadCurrent(mA)

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

DropoutVoltage(V)

150 5 10

+125 C°

+25 C°

- °40 C

At TA= +25 ° C, I

TYPICAL CHARACTERISTICS

= 0, and VS= V

LOAD

TEMPERATURE DRIFT TEMPERATURE DRIFT

(0 ° C to +85 ° C) ( – 40 ° C to +125 ° C)

Figure 1. Figure 2.

+ 0.2V, unless otherwise noted. For V

OUT

OUT

REF5020 , , REF5025
REF5030 , REF5040
REF5045 , REF5050

SBOS410 – JUNE 2007

≤ 2.5V, the minimum supply voltage is 2.7V.

OUTPUT VOLTAGE OUTPUT VOLTAGE ACCURACY

INITIAL ACCURACY vs TEMPERATURE

Figure 3. Figure 4.

POWER-SUPPLY REJECTION RATIO

vs FREQUENCY DROPOUT VOLTAGE vs LOAD CURRENT

Copyright © 2007, Texas Instruments Incorporated

Figure 5. Figure 6.

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Product Folder Link(s): REF5020 REF5025 REF5030 REF5040 REF5045 REF5050

5