|
|
PDF AD538 Data sheet ( Hoja de datos )
| Número de pieza | AD538 | |
| Descripción | Real-Time Analog Computational Unit ACU | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AD538 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
|
No Preview Available !
a
Real-Time Analog
Computational Unit (ACU)
AD538
FEATURES
VOUT =
VY
VZ m
VX
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 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
The AD538 is a monolithic real-time computational circuit that
provides precision analog multiplication, division and exponen-
tiation. 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 read-
ing 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 device’s 400 kHz
bandwidth.
The AD538’s overall transfer function 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. The desired scale factor for both
multiplication and division can be set using the on-chip +2 V or
+10 V references, or controlled externally to provide simulta-
neous multiplication and division. Exponentiation with an m
value from 0.2 to 5 can be implemented with the addition of
one or two external resistors.
FUNCTIONAL BLOCK DIAGRAM
IZ 1
25k⍀
VZ 2
LOG
RATIO
18 A
17 D
B3
16 IX
+10V 4
+2V 5
+VS 6
100⍀
INTERNAL
VOLTAGE
REFERENCE
100⍀
AD538
25k⍀ 15 VX
SIGNAL
14 GND
PWR
13 GND
–VS 7
VO 8
OUTPUT
25k⍀
I9
ANTILOG
LOG
12 C
11 IY
10 VY
25k⍀
Direct log ratio computation is possible by using only the log
ratio and output sections of the chip. Access to the multiple
summing junctions adds further to the AD538’s flexibility.
Finally, a wide power supply range of ± 4.5 V to ± 18 V allows
operation from standard ± 5 V, ± 12 V and ± 15 V supplies.
The AD538 is available in two accuracy grades (A and B) over
the industrial (–25°C to +85°C) temperature range and one
grade (S) over the military (–55°C to +125°C) temperature
range. The device is packaged in an 18-lead TO-118 hermetic
side-brazed ceramic DIP. A-grade chips are also available.
PRODUCT HIGHLIGHTS
1. Real-time analog multiplication, division and exponentiation.
2. High accuracy analog division with a wide input dynamic
range.
3. On-chip +2 V or +10 V scaling reference voltages.
4. Both voltage and current (summing) input modes.
5. Monolithic construction with lower cost and higher reliability
than hybrid and modular circuits.
REV. C
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 1999
1 page  
Typical Performance Characteristics–AD538
5.0
1000
1M
4.0 800
3.0 600
2.0 400
OFFSET
1.0 200
0
–55 –40 –20
% OF READING
0
0 20 40 60 80 100 125
TEMPERATURE – ؇C
Figure 1. Multiplier Error vs. Temperature
(100 mV < VX, VY, VZ ≤ 10 V)
400k
100k
VY = 10V dc
VZ = VX +0.05 VX SIN t
40k
10k
0.01
0.1 1
DENOMINATOR VOLTAGE, VX – V dc
10
Figure 4. Small Signal Bandwidth vs. Denominator
Voltage (One-Quadrant Mult/Div)
5.0 1000
4.0 800
3.0 600
2.0 400
OFFSET
1.0
200
0
–55 –40 –20
% OF READING
0
0 20 40 60 80 100 125
TEMPERATURE – ؇C
Figure 2. Divider Error vs. Temperature
(100 mV < VX, VY, VZ ≤ 10 V)
6.0 1200
5.0 1000
4.0 800
3.0 600
2.0
% OF READING
400
1.0 200
OFFSET
0
–55 –40 –20 0 20 40 60 80 100
TEMPERATURE – ؇C
0
125
Figure 5. Multiplier Error vs. Temperature
(10 mV < VX, VY, VZ ≤ 100 mV)
1000
VX = 10V
VY = 0V
VZ = 5V +5V SIN t VOLTS
100
10
1
100 1k 10k 100k 1M
INPUT FREQUENCY – Hz
Figure 3. VZ Feedthrough vs. Frequency
5.0 1000
4.0 800
3.0 600
2.0 400
% OF READING
1.0 200
0
–55 –40 –20
OFFSET
0 20 40 60 80 100
TEMPERATURE – ؇C
0
125
Figure 6. Divider Error vs. Temperature
(10 mV < VX, VY, VZ ≤ 100 mV)
REV. C
–5–
5 Page 
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
Side-Brazed Ceramic DIP
(D-18)
18
0.17 (4.32)
MAX
1
PIN 1
0.91 (23.12)
0.89 (22.61)
10
0.30 (7.62)
0.28 (7.12)
9
0.306 (7.78)
0.294 (7.47)
0.175 (4.45)
0.125 (3.18)
0.12 (3.05)
0.06 (1.53)
0.02 (0.508) 0.105 (2.67) 0.06 (1.53) SEATING
0.015 (0.381) 0.095 (2.42) 0.04 (1.02) PLANE
0.012 (0.305)
0.008 (0.203)
AD538
REV. C
–11–
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet AD538.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AD530 | Integrated Circuit / Multiplier / Divider / Square Rooter | Analog Devices |
| AD5300 | 8-Bit DAC | Analog Devices |
| AD5301 | +2.5 V to +5.5 V/ 120 uA/ 2-Wire Interface/ Voltage Output 8-/10-/12-Bit DACs | Analog Devices |
| AD5302 | +2.5 V to +5.5 V/ 230 uA Dual Rail-to-Rail/ Voltage Output 8-/10-/12-Bit DACs | Analog Devices |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |