AD538AD (ANALOG DEVICES)

The AD538AD is a real-time monolithic Analog Computational Unit (ACU) provides precision analogue multiplication, division and exponentiation. The combination of low input and output offset voltages and excellent linearity results in accurate computation over an unusually wide input dynamic range. Laser wafer trimming makes multiplication and division with errors as low as 0.25% of reading possible, while typical output offsets of 100µV or less add to the overall off-the-shelf performance level. Real-time analogue signal processing is further enhanced by the 400kHz bandwidth of the device. The overall transfer function of the AD538 is VO=VY (VZ/VX)m. Programming a particular function is via pin strapping. No external components are required for one-quadrant (positive input) multiplication and division. Two-quadrant (bipolar numerator) division is possible with the use of external level shifting and scaling resistors.