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Voltage Reference Operates at Under 1?A

Linear Technology : 06 April, 2010  (New Product)
Portable and remote devices can benefit from an ultra low power voltage reference with low temperature drift
Voltage Reference Operates at Under 1?A
Linear Technology announces the LT6656, a precision SOT23 voltage reference that operates on only 850nA of supply current. The LT6656 has an initial error of less than 0.05% and a guaranteed temperature drift of less than 10ppm/C. This combination of precision and ultralow power is ideal for portable, wireless and remote devices. With an output drive capability of 5mA, the LT6656 is suitable for a wide range of applications. For example, the LT6656 could serve as both the supply voltage and the precision reference for a low power, high resolution ADC. The LT6656 can replace low power shunt references, offering better efficiency and regulation in the presence of variable load current and supply voltages. For many applications, the extremely low quiescent current allows the LT6656 to remain in an always-on, stable state.

Building on Linear Technology's extensive family of precision voltage references, the LT6656 is optimized for battery-powered operation. This high performance bipolar device can withstand reverse battery conditions, accept input voltages up to 18V and operate from voltages as low as 3mV above the output voltage. When unpowered, the output is high impedance, avoiding loading on the rest of the circuit. The LT6656 is fully specified for operation from -40C to 85C, and is guaranteed functional over the extreme temperature range of -55C to 125C.

The high precision of the LT6656, combined with only 1A of supply current packaged in a tiny SOT23, demonstrates a significant advance in voltage reference technology, stated Brendan Whelan, design manager for Linear Technology.

The LT6656 is currently in production with seven voltage options.
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