DRV401-EP
www.ti.com .................................................................................................................................................. SBVS104B–JANUARY 2008–REVISED MARCH 2009
SENSOR SIGNAL CONDITIONING IC FOR
CLOSED-LOOP MAGNETIC CURRENT SENSOR
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FEATURES
SUPPORTS DEFENSE, AEROSPACE,
AND MEDICAL APPLICATIONS
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Designed For Sensors From
VACUUMSCHMELZE (VAC)
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Controlled Baseline
One Assembly/Test Site
One Fabrication Site
Available in Military (–55°C/125°C)
Temperature Range(1)
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Single Supply: 5 V
Power Output: H-Bridge
Designed For Driving Inductive Loads
Excellent DC Precision
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Extended Product Life Cycle
Extended Product-Change Notification
Product Traceability
Wide System Bandwidth
High-Resolution, Low-Temperature Drift
Built-In Degauss System
Extensive Fault Detection
External High-Power Driver Option
APPLICATIONS
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Generator/Alternator Monitoring and Control
Frequency and Voltage Inverters
Motor Drive Controllers
System Power Consumption
Photovoltaic Systems
(1) Custom temperature ranges available
DESCRIPTION/ORDERING INFORMATION
The DRV401 is designed to control and process signals from specific magnetic current sensors made by
VACUUMSCHMELZE GmbH & Co. KG (VAC). A variety of current ranges and mechanical configurations are
available. Combined with a VAC sensor, the DRV401 monitors both ac and dc currents to high accuracy.
Provided functions include: probe excitation, signal conditioning of the probe signal, signal loop amplifier, an
H-bridge driver for the compensation coil, and an analog signal output stage that provides an output voltage
proportional to the primary current. It offers overload and fault detection, as well as transient noise suppression.
The DRV401 can directly drive the compensation coil or connect to external power drivers. Therefore, the
DRV401 combines with sensors to measure small to very large currents.
To maintain the highest accuracy, the DRV401 can demagnetize (degauss) the sensor at power-up and on
demand.
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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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.
Copyright © 2008–2009, Texas Instruments Incorporated