Texas REF5025AIDRG4-Voltage Reference

REF5025AIDRG4

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.

Features for the REF5025

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 µV PP/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

Simplified Schematic

Detailed Description

The REF50xx is family of low-noise, precision band-gap voltage references that are specifically designed for excellent initial voltage accuracy and drift.

Functional Block Diagram

Application Information

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.

Typical Application

Layout

Place the power-supply bypass capacitor as closely as possible to the supply and ground pins. The recommended value of this bypass capacitor is from 1 μF to 10 μF. If necessary, additional decoupling capacitance can be added to compensate for noisy or high-impedance power supplies.

Place a 1-μF noise filtering capacitor between the NR pin and ground.

The output must be decoupled with a 1-μF to 50-μF capacitor. A resistor in series with the output capacitor is optional. For better noise performance, the recommended ESR on the output capacitor is from 1 Ω to 1.5 Ω.

A high-frequency, 1-μF capacitor can be added in parallel between the output and ground to filter noise and help with switching loads as data converters.

Layout Example

REF5025AIDRG4 Product Parameter

REF5025AIDRG4 Manufacturer

Texas Instruments is a semiconductor multinational company in Texas, USA. It is famous for developing, manufacturing, and selling semiconductor and computer technology. It is mainly engaged in innovative digital signal processing and analog circuits. In addition to the semiconductor business, it also provides solutions including sensing and control, educational products and digital light source processing. Texas Instruments (TI) is headquartered in Dallas, Texas, USA, and has manufacturing, design or sales organizations in more than 25 countries.