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