Date: 03/05/2012

5mW fully differential amplifier from Linear Tech for driving 16/18 bit ADCs

Linear Technology has announced a low power fully differential amplifier "LTC6362" that can drive high precision 16- and 18-bit SAR ADCs at only 1mA supply current. This amplifier is suited for precision industrial and data acquisition applications.

The LTC6362 has an output common-mode pin with a 0.5V to 4.5V range. This 18-bit SAR analog to digital converter features digital gain compression, which sets its full scale input range to 10% to 90% of the reference voltage. There is no need for a negative supply rail and hence simplifies the circuit and minimize power consumption.

The LTC6362 can convert single ended DC-coupled, ground-referenced signals to differential, or DC level shift differential input signals. The low input bias current, low offset voltage and rail-to-rail inputs of the LTC6362 also enable its use in a high impedance configuration to interface directly to sensors early in the signal chain.

Features of LTC6362
1. Single 2.8V to 5.25V supply
2. 200µV max offset voltage
3. 260nA max input bias current
4. Fast settling: 550ns to 18-Bit
5. 8VP-POutput
6. Rail-to-Rail inputs & outputs
7. 3.9nV/v Hz input-referred noise
8. Operating temperature ranges: 0°C to 70°C, -40°C to 85°C and -40°C to 125°C
9. 8-lead MSOP, 3x3 mm DFN package
Prices start at $1.59 each in 1,000-piece quantities.
For more information, visit http://www.linear.com/product/LTC6362