Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - voltage reference Series Adjustable SOIC 8

ADS8326

REF5040

REF

OUT

GND

+IN

-IN

+5V

OPA365

Input

Signal

0V to 4V

+5V

GND

BYPASS

1 Fm

50W

1.2nF

22 Fm

DNC

(1)

(2)

TRIM/NR

DNC

(1)

TEMP

GND

OUT

REF50xx

(1) DNC = Do not connect.

(2) NC = No internal connection.

NOTES:

D PACKAGE

(TOP VIEW)

REF5020-EP, REF5025-EP

REF5040-EP, REF5050-EP

www.ti.com

SBOS471A –APRIL 2010–REVISED JUNE 2010

LOW-NOISE, VERY LOW DRIFT, PRECISION VOLTAGE REFERENCE

Check for Samples: REF5020-EP, REF5025-EP, REF5040-EP, REF5050-EP

FEATURES

SUPPORTS DEFENSE, AEROSPACE,

AND MEDICAL APPLICATIONS

• LOW TEMPERATURE DRIFT:

• Controlled Baseline

5 ppm/°C (max)

• One Assembly/Test Site

• HIGH ACCURACY:

• One Fabrication Site

0.08% (max)

• Available in Military (–55°C/125°C)

• LOW NOISE: 3 mV

Temperature Range

(1)

• HIGH OUTPUT CURRENT: ±10 mA

• Extended Product Life Cycle

• Extended Product-Change Notification

APPLICATIONS

• Product Traceability

• 16-BIT DATA ACQUISITION SYSTEMS

DESCRIPTION

• ATE EQUIPMENT

• INDUSTRIAL PROCESS CONTROL The REF50xx is a family of low-noise, low-drift, very

high precision voltage references. These references

• MEDICAL INSTRUMENTATION

are capable of both sinking and sourcing, and are

• OPTICAL CONTROL SYSTEMS

very robust with regard to line and load changes.

• PRECISION INSTRUMENTATION

(1) Custom temperature ranges available

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
REF5020-EP, REF5025-EP REF5040-EP, REF5050-EP www.ti.com SBOS471A – APRIL 2010 – REVISED JUNE 2010 LOW-NOISE, VERY LOW DRIFT, PRECISION VOLTAGE REFERENCE Check for Samples: REF5020-EP, REF5025-EP, REF5040-EP, REF5050-EP SUPPORTS DEFENSE, AEROSPACE, AND MEDICAL APPLICATIONS FEATURES 1 • 2 • • • LOW TEMPERATURE DRIFT: 5 ppm/°C (max) HIGH ACCURACY: 0.
PAGE 2
REF5020-EP, REF5025-EP REF5040-EP, REF5050-EP SBOS471A – APRIL 2010 – REVISED JUNE 2010 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.
PAGE 3
REF5020-EP, REF5025-EP REF5040-EP, REF5050-EP www.ti.com SBOS471A – APRIL 2010 – REVISED JUNE 2010 ELECTRICAL CHARACTERISTICS: PER DEVICE Boldface limits apply over the specified temperature range, TA = –55°C to 125°C. At TA = 25°C, ILOAD = 0, CL = 1 mF, and VIN = (VOUT + 0.2 V) to 18 V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNIT –0.05 0.05 % –0.08 0.08 % REF5020 (VOUT = 2.048V) (1) OUTPUT VOLTAGE Output Voltage VOUT 2.
PAGE 4
REF5020-EP, REF5025-EP REF5040-EP, REF5050-EP SBOS471A – APRIL 2010 – REVISED JUNE 2010 www.ti.com ELECTRICAL CHARACTERISTICS: ALL DEVICES Boldface limits apply over the specified temperature range, TA = –55°C to 125°C. At TA = 25°C, ILOAD = 0, CL = 1 mF, and VIN = (VOUT + 0.2 V) to 18 V, unless otherwise noted. REF50xx PARAMETER CONDITIONS MIN TYP MAX UNIT REF5025 4 6.5 ppm/°C REF5050 4 6.
PAGE 5
REF5020-EP, REF5025-EP REF5040-EP, REF5050-EP www.ti.com SBOS471A – APRIL 2010 – REVISED JUNE 2010 TYPICAL CHARACTERISTICS At TA = 25°C, ILOAD = 0, and VS = VOUT + 0.2 V, unless otherwise noted. For VOUT ≤ 2.5 V, the minimum supply voltage is 2.7 V. 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.
PAGE 6
REF5020-EP, REF5025-EP REF5040-EP, REF5050-EP SBOS471A – APRIL 2010 – REVISED JUNE 2010 www.ti.com TYPICAL CHARACTERISTICS (continued) At TA = 25°C, ILOAD = 0, and VS = VOUT + 0.2 V, unless otherwise noted. For VOUT ≤ 2.5 V, the minimum supply voltage is 2.7 V. DROPOUT VOLTAGE vs LOAD CURRENT 160 0.8 140 0.7 120 0.6 Dropout Voltage (V) PSRR (dB) POWER-SUPPLY REJECTION RATIO vs FREQUENCY 100 80 60 40 20 +125°C +25°C 0.5 -40°C 0.4 0.3 0.2 0.
PAGE 7
REF5020-EP, REF5025-EP REF5040-EP, REF5050-EP www.ti.com SBOS471A – APRIL 2010 – REVISED JUNE 2010 TYPICAL CHARACTERISTICS (continued) At TA = 25°C, ILOAD = 0, and VS = VOUT + 0.2 V, unless otherwise noted. For VOUT ≤ 2.5 V, the minimum supply voltage is 2.7 V. QUIESCENT CURRENT vs INPUT VOLTAGE QUIESCENT CURRENT vs TEMPERATURE 1050 Quiescent Current (mA) 1000 950 900 850 800 750 700 650 600 -50 -25 0 25 50 Temperature (°C) 75 100 125 Figure 9. Figure 10.
PAGE 8
REF5020-EP, REF5025-EP REF5040-EP, REF5050-EP SBOS471A – APRIL 2010 – REVISED JUNE 2010 www.ti.com TYPICAL CHARACTERISTICS (continued) At TA = 25°C, ILOAD = 0, and VS = VOUT + 0.2 V, unless otherwise noted. For VOUT ≤ 2.5 V, the minimum supply voltage is 2.7 V. STARTUP (REF5025, CL = 1 mF) 1mV/div NOISE VIN 2V/div VOUT 1V/div 1s/div 40 µs/div Figure 13. Figure 14.
PAGE 9
REF5020-EP, REF5025-EP REF5040-EP, REF5050-EP www.ti.com SBOS471A – APRIL 2010 – REVISED JUNE 2010 TYPICAL CHARACTERISTICS (continued) At TA = 25°C, ILOAD = 0, and VS = VOUT + 0.2 V, unless otherwise noted. For VOUT ≤ 2.5 V, the minimum supply voltage is 2.7 V. LOAD TRANSIENT (CL = 10mF, IOUT = 10mA) ILOAD 10mA/div LINE TRANSIENT (CL = 1mF) +10mA -10mA -10mA VIN 500mV/div VOUT 2mV/div VOUT 5mV/div 100ms/div 20ms/div Figure 19. Figure 20.
PAGE 10
REF5020-EP, REF5025-EP REF5040-EP, REF5050-EP SBOS471A – APRIL 2010 – REVISED JUNE 2010 www.ti.com 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 22 shows a simplified block diagram of the REF50xx.
PAGE 11
REF5020-EP, REF5025-EP REF5040-EP, REF5050-EP www.ti.com SBOS471A – APRIL 2010 – REVISED JUNE 2010 The TEMP pin has high output impedance (see Figure 22). 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 26.
PAGE 12
REF5020-EP, REF5025-EP REF5040-EP, REF5050-EP SBOS471A – APRIL 2010 – REVISED JUNE 2010 www.ti.com 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 5-V supply. Figure 27 shows the REF5020 used to provide a 2.5-V supply reference voltage.
PAGE 13
PACKAGE OPTION ADDENDUM www.ti.
PAGE 14
PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 (4) Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Top-Side Marking for that device. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.
PAGE 15
PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing REF5020MDREP SOIC D 8 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 REF5025MDTEP SOIC D 8 250 180.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 REF5040MDREP SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.
PAGE 16
PACKAGE MATERIALS INFORMATION www.ti.com 26-Jan-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) REF5020MDREP SOIC D 8 2500 367.0 367.0 35.0 REF5025MDTEP SOIC D 8 250 210.0 185.0 35.0 REF5040MDREP SOIC D 8 2500 367.0 367.0 35.0 REF5050MDREP SOIC D 8 2500 367.0 367.0 35.
PAGE 17
PAGE 18
PAGE 19
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.