Analog Devices’ Current Sense Amplifier Achieves Industry’s Highest Accuracy for Industrial and Automotive Applications

- The AD8207 high-voltage current sense amplifier is the first to deliver a max 1 uV/°C offset temperature drift while featuring negative common-mode voltage operation and high bandwidth; amplifier is suitable for a variety of PWM closed-loop current control systems.

NORWOOD, Mass. — (BUSINESS WIRE) — September 8, 2010Analog Devices, Inc. (ADI), a world leader in semiconductors for mixed-signal processing applications and leading supplier of signal conditioning technology, today introduced the industry’s most accurate high-voltage amplifier for current sensing applications. The AD8207 zero-drift, high-voltage, bi-directional current sense amplifier meets the robust performance and quality requirements for motor and solenoid control in industrial and automotive applications. The product features breakthrough temperature accuracy specified at a maximum of 1 μV/°C offset drift over the automotive temperature range of -40 degrees C to 125 degrees C -- a 5-fold improvement over competing devices. Click here to see the AD8207 Current Sense Amplifier video.

The unique architecture of the AD8207 accurately amplifies small differential current shunt voltages in the presence of rapidly changing common-mode voltages ranging from -4 V to 65 V. The new current sense amplifier rejects PWM (pulse width modulation) input common-mode voltages, while the zero-drift architecture yields the lowest offset drift performance available today. Click here to download the datasheet and order samples.

”For customers who need automotive-grade performance, the AD8207 is the only zero-drift current sense amplifier with high bandwidth and a common-mode voltage range that extends below ground,” said Steve Sockolov, director, Precision Signal Conditioning Group, Analog Devices. “The industry’s lowest guaranteed offset drift, coupled with greater than 150-kHz bandwidth, and maximum 0.3 percent gain error, means the AD8207 achieves best-in-class accuracy without requiring the larger PCB layout and multi-temperature production calibration of discrete alternatives.”

AD8207 Current Sense Amplifier Key Features and Benefits

  • Provides low-drift current measurement for closed-loop motor control in safety critical automotive applications, such as electric power steering and advanced braking.
  • Enables accurate current measurements to control solenoids and actuators in industrial applications.
  • Input common-mode voltage range:
    −4 V to +65 V operating (5 V supply)
    −4 V to +35 V operating (3.3 V supply)
    −25 V to +75 V input survival
  • Offset drift is typically less than 500 nV/ degrees C and gain drift is below 10 ppm/ degrees C.
  • 80 dB CMRR (common-mode rejection ratio) from dc to 100 kHz.
  • Meets AEC-Q100 standards. Tested for EMI (electromagnetic interference) compliance.
  • Adjustable output offset is effective for bi-directional current measurements.

Availability, Pricing and Complementary Products

               
Product

Sample
Availability

Price
Each Per
1K

Temperature
Range

Packaging

AD8207WBRZ

NOW $1.99 -40°C - 125°C 8-lead SOIC

AD8207WBRZ-RL

NOW $1.99 -40°C - 125°C

8-lead SOIC,
13” Tape/Reel

AD8207WBRZ-R7

NOW $1.99 -40°C - 125°C

8-lead SOIC,
7” Tape/Reel


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