器件名称: AD883B
功能描述: Real-Time Analog Computational Unit ACU
文件大小: 167.36KB 共11页
简 介:a
FEATURES V OUT = VY Transfer Function VX Wide Dynamic Range (Denominator) –1000:1 Simultaneous Multiplication and Division Resistor-Programmable Powers and Roots No External Trims Required Low Input Offsets <100 V Low Error 0.25% of Reading (100:1 Range) +2 V and +10 V On-Chip References Monolithic Construction APPLICATIONS One- or Two-Quadrant Mult/Div Log Ratio Computation Squaring/Square Rooting Trigonometric Function Approximations Linearization Via Curve Fitting Precision AGC Power Functions PRODUCT DESCRIPTION
VZ
m
Real-Time Analog Computational Unit (ACU) AD538
FUNCTIONAL BLOCK DIAGRAM
IZ 1 VZ 2 B 3 +10V 4 100 +2V 5 +VS 6 –VS 7 VO 8 I 9 INTERNAL VOLTAGE REFERENCE OUTPUT 25k
11 18
A D IX VX SIGNAL GND PWR GND C IY VY
25k
LOG RATIO
17
16
100
25k
15
14
AD538
13
12
ANTILOG LOG 25k
10
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 V or less add to the overall off-the-shelf performance level. Real-time analog signal processing is further enhanced by the device’s 400 kHz bandwidth. The AD538’s overall transfer function is VO = VY (VZ / VX)m. Programming a particular function ……
