company blog about Mingjiada Supply TI REF200 Dual Precision Current Source And Current Sink, Supply TI Constant-Current Source Chip

Mingjiada Electronics supplies the TI REF200 dual current source and sink | Constant current source chip—high-precision dual-channel 100µA current source/sink, suitable for sensor excitation, precision biasing and test and measurement

In precision analogue circuit design, a stable and reliable constant current source is key to ensuring the accuracy of sensor excitation, bridge bias, current loops and test and measurement applications. Mingjiada Electronics has long supplied the TI (Texas Instruments) REF200 dual current source and current sink, offering customers in industrial control, medical electronics, test equipment and portable devices genuine original manufacturer products, stock availability and one-stop BOM fulfilment services.

I. TI REF200 Product Overview

The TI REF200 is a classic dual current source and current sink chip, integrating two 100µA current sources and two 100µA current sinks. Its greatest advantage lies in its ability to provide stable, matched current outputs without the need for external precision resistors, significantly simplifying constant current source design whilst enhancing system accuracy and temperature stability.

The REF200 features a compact package, making it suitable for high-density PCB layouts, and is widely used in analogue front-ends where precision, power consumption and long-term stability are critical.

II. Key Features of the REF200

Dual 100µA current sources + dual 100µA current sinks

High initial accuracy: typically ±0.5%

Low temperature drift: typically ±25 ppm/°C

Wide supply voltage range: 2.5 V to 40 V

No external precision resistors required

Good matching between current sources and sinks

Output current can be scaled by parallel connection

Compact package, suitable for space-saving designs

Excellent long-term stability, suitable for precision analogue applications

III. Typical Applications

As a constant-current source chip, the REF200 is suitable for the following applications:

Excitation of sensors such as RTDs, thermistors and strain gauges

Bridge circuit bias

Precision analogue front-end bias

4–20 mA current loops

Test and measurement equipment

Medical instruments

Industrial automation control

Battery-powered precision instruments

Data acquisition systems

IV. Why Choose the REF200?

Traditional constant-current source solutions typically require the use of operational amplifiers, reference voltage sources and precision resistors, presenting issues such as a large number of components, difficulty in matching temperature drift, and a large footprint. The REF200 integrates multiple current sources and current sinks onto a single chip, offering significant advantages:

Simplified design: Reduces the number of external components and shortens the development cycle.

Improved accuracy: Internal matching is superior to discrete solutions, reducing offset and drift.

Reduced temperature drift: Suitable for wide operating temperature ranges.

Space-saving: Compact package, facilitating high-density layouts.

Enhanced reliability: Reduces the impact of thermal drift from solder joints and external resistors.

V. Models Supplied by Mingjiada Electronics

Mingjiada Electronics supplies the TI REF200 series, with common models including:

REF200AU

REF200AU/2K5

REF200AUE4

REF200AU/2K5E4

For specific suffixes, packages, batches, years of manufacture and prices, please refer to our real-time quotation.

If you wish to purchase TI REF200 dual current sources and current sinks, please visit the Mingjiada Electronics website (https://www.integrated-ic.com/) for further supply details.

Tags: REF200AU, REF200A, REF200