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Current sense amps promise high precision

Posted: 12 Feb 2007 ?? ?Print Version ?Bookmark and Share

Keywords:amplifier? current sense amp? current sensor? Linear Tech? H-bridge?

Linear Technology's LTC6103 contains two independent, high side current sense amplifiers with high precision and response time. As a dual, this device is suitable for multiple current sensing applications such as H-bridge driver circuits. The unique topology allows the second amplifier to also be used for bi-directional operation, high/low current ranging or high voltage level translation.

The LTC6103 promises outstanding performance: input bias current is 170nA Max and the maximum input offset voltage is 450?:V. This precision performance allows the part to resolve very small currents and still operate over a large dynamic range. The device can withstand voltages up to 70V, a valuable feature when power supply failures or catastrophic load changes can lead to voltage fly back conditions. With a response time of 1?s, the LTC6103 is suitable for automatic power shutdown when sensing fault conditions. Gain for each device is set by two resistors and since the gain resistors are the primary determinants of accuracy, precision resistors allow for accuracy better than one percent. The operating temperature range is -40&176:C to 125&176:C.

The LTC6103 is in full production, with prices starting $1.66 each in 1,000-piece quantities.

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Related Datasheets
Part Number Description Category
? LTC6103 Dual High Voltage, High Side Current Sense Amplifier Circuit and Heat Protection Devices



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