ad7545akr-reel Analog Devices, Inc., ad7545akr-reel Datasheet

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ad7545akr-reel

Manufacturer Part Number
ad7545akr-reel
Description
Cmos 12-bit Buffered Multiplying Dac
Manufacturer
Analog Devices, Inc.
Datasheet
a
GENERAL DESCRIPTION
The AD7545A, a 12-bit CMOS multiplying DAC with internal
data latches, is an improved version of the industry standard
AD7545. This new design features a WR pulse width of 100 ns,
which allows interfacing to a much wider range of fast 8-bit and
16-bit microprocessors. It is loaded by a single 12-bit-wide word
under the control of the CS and WR inputs; tying these control
inputs low makes the input latches transparent, allowing unbuf-
fered operation of the DAC.
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.
FEATURES
Improved Version of AD7545
Fast Interface Timing
All Grades 12-Bit Accurate
20-Lead DIP and Surface Mount Packages
Low Cost
DIP/SOIC
PIN CONFIGURATIONS
LCCC
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
FUNCTIONAL BLOCK DIAGRAM
Buffered Multiplying DAC
World Wide Web Site: http://www.analog.com
© Analog Devices, Inc., 2000
PLCC
CMOS 12-Bit
AD7545A

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ad7545akr-reel Summary of contents

Page 1

... Analog Devices. Buffered Multiplying DAC FUNCTIONAL BLOCK DIAGRAM PIN CONFIGURATIONS LCCC 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 CMOS 12-Bit AD7545A PLCC © Analog Devices, Inc., 2000 ...

Page 2

AD7545A–SPECIFICATIONS Parameter Version STATIC PERFORMANCE Resolution All Relative Accuracy Differential Nonlinearity All Gain Error Gain Temperature Coefficient All ∆Gain/∆Temperature All 2 DC Supply Rejection ∆Gain/∆V All DD ...

Page 3

... Temperature 1 Model Range AD7545AKN 0°C to +70°C AD7545ALN 0°C to +70°C AD7545AKR 0°C to +70°C AD7545AKP 0°C to +70°C AD7545ALP 0°C to +70°C AD7545ABQ –25°C to +85°C AD7545ACQ –25°C to +85°C AD7545ABE – ...

Page 4

AD7545A CIRCUIT INFORMATION—D/A CONVERTER SECTION Figure 1 shows a simplified circuit of the D/A converter section of the AD7545A, and Figure 2 gives an approximate equivalent circuit. Note that the ladder termination resistor is connected to AGND typically ...

Page 5

Figure 5 and Table III illustrate the recommended circuit and code relationship for bipolar operation. The D/A function itself uses offset binary code and inverter U 1 verts twos complement input code to offset binary code. If ap- propriate, inversion ...

Page 6

AD7545A Invalid Data: When WR and CS are both low, the latches are transparent and the D/A converter inputs follow the data inputs. In some bus systems, data on the data bus is not always valid for the whole period ...

Page 7

The circuits of Figures 4, 5 and 6 can all be converted to single supply operation by biasing AGND to some voltage between V and DGND. Figure 10 shows the 2s Complement Bipolar DD circuit of Figure 5 modified to ...

Page 8

AD7545A 20-Lead SOIC (R-20) 0.5118 (13.00) 0.4961 (12.60 PIN 1 0.1043 (2.65) 0.0926 (2.35) 0.0500 0.0118 (0.30) 0.0192 (0.49) SEATING 0.0125 (0.32) (1.27) 0.0040 (0.10) 0.0138 (0.35) PLANE BSC 0.0091 (0.23) 20-Lead Cerdip (Q-20) OUTLINE DIMENSIONS ...

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