Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - voltage reference Series Adjustable SOT 23 6

1GND_F

GND_S

ENABLE

OUT_S

OUT_F

REF3212

REF3220

REF3225

REF3230

REF3233

REF3240

REF3212, REF3220

REF3225, REF3230

REF3233, REF3240

www.ti.com

SBVS058C –JUNE 2005– REVISED AUGUST 2011

4ppm/°C, 100μA, SOT23-6

SERIES VOLTAGE REFERENCE

Check for Samples: REF3212, REF3220, REF3225, REF3230, REF3233, REF3240

FEATURES

DESCRIPTION

The REF32xx is a very low drift, micropower,

• Excellent Specified Drift Performance:

low-dropout, precision voltage reference family

– 7ppm/°C (max) at 0°C to +125°C

available in the tiny SOT23-6 package.

– 20ppm/°C (max) at –40°C to +125°C

The small size and low power consumption (120μA

• Microsize Package: SOT23-6

max) of the REF32xx make it ideal for portable and

• High Output Current: ±10mA

battery-powered applications. This reference is stable

with any capacitive load.

• High Accuracy: 0.01%

The REF32xx can be operated from a supply as low

• Low Quiescent Current: 100μA

as 5mV above the output voltage, under no load

• Low Dropout: 5mV

conditions. All models are specified for the wide

temperature range of –40°C to +125°C.

APPLICATIONS

• Portable Equipment

AVAILABLE OUTPUT VOLTAGES

PRODUCT VOLTAGE

• Data Acquisition Systems

REF3212 1.25V

• Medical Equipment

REF3220 2.048V

• Test Equipment

REF3225 2.5V

REF3230 3.0V

REF3233 3.3V

REF3240 4.096

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.

2All 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.

Summary of content (19 pages)

PAGE 1
REF3212, REF3220 REF3225, REF3230 REF3233, REF3240 SBVS058C – JUNE 2005 – REVISED AUGUST 2011 www.ti.com 4ppm/°C, 100μA, SOT23-6 SERIES VOLTAGE REFERENCE Check for Samples: REF3212, REF3220, REF3225, REF3230, REF3233, REF3240 FEATURES DESCRIPTION • The REF32xx is a very low drift, micropower, low-dropout, precision voltage reference family available in the tiny SOT23-6 package.
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REF3212, REF3220 REF3225, REF3230 REF3233, REF3240 SBVS058C – JUNE 2005 – REVISED AUGUST 2011 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.
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REF3212, REF3220 REF3225, REF3230 REF3233, REF3240 SBVS058C – JUNE 2005 – REVISED AUGUST 2011 www.ti.com ELECTRICAL CHARACTERISTICS Boldface limits apply over the listed temperature range. At TA = +25°C, ILOAD = 0mA, and VIN = 5V, unless otherwise noted. REF32xx PARAMETER CONDITIONS MIN TYP MAX UNIT 1.2475 1.25 1.2525 V –0.2 0.01 0.2 % REF3212 (1.25V) OUTPUT VOLTAGE, VOUT Initial accuracy NOISE Output voltage noise f = 0.
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REF3212, REF3220 REF3225, REF3230 REF3233, REF3240 SBVS058C – JUNE 2005 – REVISED AUGUST 2011 www.ti.com ELECTRICAL CHARACTERISTICS (continued) Boldface limits apply over the listed temperature range. At TA = +25°C, ILOAD = 0mA, and VIN = 5V, unless otherwise noted. REF32xx PARAMETER CONDITIONS MIN TYP MAX UNIT REF3212 / REF3220 / REF3225 / REF3230 / REF3233 / REF3240 OUTPUT VOLTAGE TEMP DRIFT dVOUT/dT 0°C ≤ TA ≤ +125°C –40°C ≤ TA ≤ +125°C LONG-TERM STABILITY 0 to 1000h 4 7 ppm/°C 10.
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REF3212, REF3220 REF3225, REF3230 REF3233, REF3240 SBVS058C – JUNE 2005 – REVISED AUGUST 2011 www.ti.com TYPICAL CHARACTERISTICS At TA = +25°C, ILOAD = 0mA, VIN = +5V power supply, and REF3225 used for typical characteristics, unless otherwise noted. TEMPERATURE DRIFT (–40°C to +125°C) Population Population TEMPERATURE DRIFT (0°C to +125°C) 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Drift (ppm/°C) Drift (ppm/°C) Figure 1. Figure 2.
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REF3212, REF3220 REF3225, REF3230 REF3233, REF3240 SBVS058C – JUNE 2005 – REVISED AUGUST 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) At TA = +25°C, ILOAD = 0mA, VIN = +5V power supply, and REF3225 used for typical characteristics, unless otherwise noted. OUTPUT VOLTAGE vs LOAD CURRENT 1.2525 2.505 1.2520 2.504 1.2515 2.503 1.2510 1.2505 Output Voltage (V) +125°C 1.2500 +25°C 1.2495 1.2490 -40°C 1.2485 2.502 2.501 +125°C 2.500 +25°C 2.499 2.498 -40°C 2.497 1.2480 2.496 1.
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REF3212, REF3220 REF3225, REF3230 REF3233, REF3240 SBVS058C – JUNE 2005 – REVISED AUGUST 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) At TA = +25°C, ILOAD = 0mA, VIN = +5V power supply, and REF3225 used for typical characteristics, unless otherwise noted. 500mV/div LINE TRANSIENT CL = 10µF VIN VIN VOUT 20mV/div 20mV/div 500mV/div LINE TRANSIENT CL = 0pF ILOAD VOUT 20ms/div 100ms/div Figure 13. Figure 14.
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REF3212, REF3220 REF3225, REF3230 REF3233, REF3240 SBVS058C – JUNE 2005 – REVISED AUGUST 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) At TA = +25°C, ILOAD = 0mA, VIN = +5V power supply, and REF3225 used for typical characteristics, unless otherwise noted. LONG-TERM STABILITY (32 Units) Output Voltage Stability (ppm) 200 150 100 50 0 -50 -100 -150 -200 0 200 400 600 800 1000 1200 Time (Hours) Figure 19.
PAGE 9
REF3212, REF3220 REF3225, REF3230 REF3233, REF3240 SBVS058C – JUNE 2005 – REVISED AUGUST 2011 www.ti.com The REF32xx also features a low quiescent current of 100μA, with a maximum quiescent current over temperature of just 135μA. The quiescent current typically changes less than 2μA over the entire supply range, as shown in Figure 22. 110 The RC filter in Figure 23 can be used as a starting point for the REF3240.
PAGE 10
REF3212, REF3220 REF3225, REF3230 REF3233, REF3240 SBVS058C – JUNE 2005 – REVISED AUGUST 2011 www.ti.com THERMAL HYSTERESIS LONG-TERM STABILITY Thermal hysteresis for the REF32xx is defined as the change in output voltage after operating the device at +25°C, cycling the device through the specified temperature range, and returning to +25°C. It can be expressed as: Long-term stability refers to the change of the output voltage of a reference over a period of months or years.
PAGE 11
REF3212, REF3220 REF3225, REF3230 REF3233, REF3240 SBVS058C – JUNE 2005 – REVISED AUGUST 2011 www.ti.com APPLICATION CIRCUITS +5V NEGATIVE REFERENCE VOLTAGE 3 For applications requiring a negative and positive reference voltage, the REF32xx and OPA735 can be used to provide a dual-supply reference from a ±5V supply. Figure 25 shows the REF3225 used to provide a ±2.5V supply reference voltage.
PAGE 12
REF3212, REF3220 REF3225, REF3230 REF3233, REF3240 SBVS058C – JUNE 2005 – REVISED AUGUST 2011 www.ti.com 2.5V Supply 2.5V 3 5W VIN 4 + 5 REF3212 2 6 VOUT = 1.25V VREF 1 VS ADS8324 VCC + 0.1mF 1mF to 10mF GND +In 0V to 1.25V 1mF to 10mF Microcontroller CS DOUT -In GND DCLOCK Figure 27. Basic Data Acquisition System 2 +5V 2 1 REF3240 5 3 4 6 VOUT = 4.096V 1kW 0.1mF 10W 22mF +5V 1kW VIN 1mF VREF 10W ADS8381 THS4031 6800pF 0.22mF 500W -5V Figure 28.
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REF3212, REF3220 REF3225, REF3230 REF3233, REF3240 SBVS058C – JUNE 2005 – REVISED AUGUST 2011 www.ti.com REVISION HISTORY NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision B (February 2006) to Revision C Page • Added Pin Descriptions table ................................................................................................................................................ 2 • Added note to Enable/Shutdown parameter .........
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 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.
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