GENERAL DESCRIPTION
The AD538 is a monolithic real-time computational circuit that provides precision analog 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 100 μV or less add to the overall off-the-shelf performance level. Real-time analog signal processing is further enhanced by the 400 kHz bandwidth of the device.

FEATURES
   VO = VY(VZ/VX)m transfer function
   Wide dynamic range (denominator) −1000:1
   Simultaneous multiplication and division
   Resistor-programmable powers and roots
   No external trims required
   Low input offsets <100 μV
   Low error ±0.25% of reading (100:1 range)
   Monolithic construction
   Real-time analog multiplication, division and
      exponentiation
   High accuracy analog division with a wide input dynamic range
   On board +2 V or +10 V scaling reference
   Voltage and current (summing) input modes
   Monolithic construction with lower cost and higher
      reliability than hybrid and modular circuits

APPLICATIONS
   One- or two-quadrant multiply/divide
   Log ratio computation
   Squaring/square rooting
   Trigonometric function approximations
   Linearization via curve fitting
   Precision AGC
   Power functions