Document
REF5010, REF5020, REF5025, REF5030, REF5040, REF5045, REF5050
SBOS410K – JUNE 2007 – REVISED JUNE 2023
REF50xx Low-Noise, Very Low Drift, Precision Voltage Reference
1 Features
• Low temperature drift: – High-grade: 3 ppm/°C (maximum) – Standard-grade: 8 ppm/°C (maximum)
• High accuracy: – High-grade: 0.05% (maximum) – Standard-grade: 0.1% (maximum)
• Low noise: 3 μVPP/V • Excellent long-term stability:
– 22 ppm after first 1000 hours (SOIC-8) – 50 ppm after first 1000 hours (VSSOP-8) • High-output current: ±10 mA • Temperature range: –40°C to 125°C
2 Applications
• Precision data acquisition systems • Semiconductor test equipment • Industrial process controls • Medical instrumentation • Pressure and temperature transmitters • Lab and field instrumentation
3 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 current, and have excellent line and load regulation.
Excellent temperature drift (3 ppm/°C) and high accuracy (0.05%) are achieved using proprietary design techniques. These features, combined with very low noise, make the REF50xx family an excellent choice for use in high-precision data acquisition systems.
Each reference voltage is available in both high grade (REF50xxIDGK and REF50xxID) and standard grade (REF50xxAIDGK and REF50xxAID). The reference voltages are offered in 8-pin VSSOP and SOIC packages, and are specified from –40°C to 125°C.
Device Information
PART NUMBER
PACKAGE (1)
BODY SIZE (NOM)
REF50xx
SOIC (8) VSSOP (8)
4.90 mm × 3.91 mm 3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Input Signal, 0 V to 4 V
5V OPA365
R1 124 Ÿ
C1 1 nF
5V
IN
VDD
ADS8326
IN REF GND
+5V
CBYPASS 1 µF
REF5040
VIN
VOUT
GND
C2 22 µF
Copyright © 2016, Texas Instruments Incorporated
Simplified Schematic
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA.
REF5010, REF5020, REF5025, REF5030, REF5040, REF5045, REF5050
SBOS410K – JUNE 2007 – REVISED JUNE 2023
www.ti.com
Table of Contents
1 Features............................................................................1 2 Applications..................................................................... 1 3 Description.......................................................................1 4 Revision History.............................................................. 2 5 Device Comparison Table...............................................3 6 Pin Configuration and Functions...................................3 7 Specifications.................................................................. 4
7.1 Absolute Maximum Ratings........................................ 4 7.2 ESD Ratings............................................................... 4 7.3 Recommended Operating Conditions.........................4 7.4 Thermal Information....................................................4 7.5 Electrical Characteristics.............................................5 7.6 Typical Characteristics................................................ 7 8 Parameter Measurement Information.......................... 12 9 Detailed Description......................................................14 9.1 Overview................................................................... 14 9.2 Functional Block Diagram......................................... 14 9.3 Feature Description...................................................15
9.4 Device Functional Modes..........................................18 10 Applications and Implementation.............................. 19
10.1 Application Information........................................... 19 10.2 Typical Applications................................................ 19 11 Power Supply Recommendations..............................20 12 Layout...........................................................................21 12.1 Layout Guidelines................................................... 21 12.2 Layout Example...................................................... 21 12.3 Power Dissipation................................................... 21 13 Device and Documentation Support..........................22 13.1 Documentation Support.......................................... 22 13.2 Receiving Notification of Documentation Updates..22 13.3 Support Resources................................................. 22 13.4 Trademarks............................................................. 22 13.5 Glossary..................................................................22 14 Mechanical, Packaging, and Orderable Information.................................................................... 22
4 Revision History
NOTE: Page numbers for previo.