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AD8218: Zero Drift bidirectional shunt.

In Electronic Infomation Category: A | on April 19,2011

AD8218 is a high-pressure, high-resolution streaming amplifier. Set gain of 20 V / V, in the whole temperature range of maximum gain error of 0.35%. Buffered output voltage can be directly connected with any typical converter. AD8218 in the range of 4V to 80V input with excellent common mode rejection performance, it is bi-directional shunt resistor current measurement, for a variety of industrial and KVL16 datasheet and telecommunications applications, including motor control, battery management and KVL16 price and base station power amplifier bias control.

At -40 C to +125 C throughout the temperature range, AD8218 can provide breakthrough performance. It uses the kernel of zero drift in the entire operating temperature range and KVL16 suppliers and common mode voltage range, offset drift is typically 100 nV / C. In addition, the design also pay special attention to 0 mV to ~ 250 mV of the input differential voltage range to maintain a linear output. AD8218 also includes an internal reference voltage 80 mV, used to provide unidirectional current sensing applications optimized dynamic range. A typical input offset voltage of 50 V.

AD8218 8-pin MSOP package.

AD8218 Functional Block Diagram


Features

high common-mode voltage range

- Working range: 4 V to 80 V

- Pressure range: -0.3 V to 85 V

buffered output voltage

gain = 20 V / V

Wide operating temperature range:

-40 C to +125 C

excellent ac and dc performance

- Offset Drift: 100 nV / C (typical value)

- Offset: 50 V / C (typical value)

- Gain Drift: 5 ppm / C (typical value)

- Common mode rejection ratio (CMRR): 110 dB (typical, DC)

data download: AD8218.rar

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