Advanced Linear Devices Inc. 的 ALD500,523D Chipset 规格书

ALD500/ALD523D Chipset
A/D Converter-Display Module Controller
Features
www.aldinc.com
ADVANCED
LINEAR
DEVICES, INC.
TheALD500/523D chipset is a precision 18-bit plus sign
bit dual-slope integrating analog/digital converter. De-
signed as an analog/digital 2-chip chipset to minimize
mixed signal crosstalk and noise, this A/D converter and display
module controller combination is unique to the industry. The
ALD500 analog chip or optional ALD500R functions as the dual-
slope integrator — the latter incorporates an on-chip precision
voltage reference. The digital chip, ALD523D is a dedicated con-
troller I.C. designed to conveniently interface with a variety of
LCD/VFD multiline alphanumeric character display modules. The
ALD523D features multi-function control inputs for a broad range
of user selectable functions, including up to 3 separate display
settings. The ALD523D also features power-down (sleep mode),
chip select and integration time select. Combined, the chipset of-
fers designers an immediate solution to an otherwise complex en-
gineering task that would generally require extensive development
effort using discrete components.
The chipset is primarily intended for precision embedded dis-
play applications including embedded digital panel meters, cus-
tomized/specialized instrument displays, temperature monitoring,
high resolution voltmeters, signal conditioners, laboratory
datalogging, process monitors, and DVM for portable/field trouble-
shooting and calibration systems. Full-scale analog input range is
+/- 2.00000 VDC with a linearity of 0.005%. Up to 7 full digits
can be displayed as an A/D converter measurement value.
Configured for maximum user flexibility, the ALD523D con-
troller chip can be operated in 3 user selectable application spe-
cific functional modes; Mode A - calibrated reference, Mode B -
ratiometric, and Mode C - display only. Mode A is used primarily
for measurements against a calibrated reference voltage typically
required in precision voltmeter applications. Mode B is intended
for measurements against a ratiometric reference voltage such as
those required in weigh scale applications. Mode C is used for
display applications where the input data is already formatted in
industry standard serial binary from other microprocessors or data
converters - up to 32 serial bits including a sign bit. In Mode C,
only the digital ALD523D chip is required.
In addition to the three modes of operation, up to three sepa-
rate display group settings are available, each with different scale
factors and UNIT displays. For applications such as embedded
measurement instrument modules, up to three separate ranges of
a single measurement can be preset, selected and displayed. Both
software and hardware based settings are available for setting a
variety of parameters such as Samples Averaging, Decimal Place-
ment, Digits Blanking, Zero Level, Display Group Setting, Mode
Selection, UNIT Labeling, and Calibration.
• Up to 7 full digits plus sign (± 9999999) display
• Stand alone display module control operation.
• Up to 3 separate DISPLAY settings.
• Compatible with industry standard 1-line or 2-line x
16 character display module such as LCD or VFD
• +/-3V to +/-5V power supply.
• Accepts most industry standard serial inputs up to
32-bits, including sign bit.
• 3 selectable operating modes.
• PC based software included for calibration
and initial setup.
Standard PC setup/calibration software is pro-
vided for use with the chipset. This software is used
to initially configure the ALD523D controller chip
in any of the 3 operating modes, as well as to per-
form system calibration and to establish user-defined
alphanumeric “TITLE and UNIT fields” for the dis-
play module, which are stored in an external
EEPROM. Communications between the ALD523D
and PC are performed over the parallel printer port.
Software
Chipset consisting of ALD500 Integrating Analog
Processor and ALD523D Display Module Controller
ALD523D Specifications*
ALD523D Operating Temp. Range
Product Applications
ALD523D Packaging
• Embedded precision digital display
• High-resolution DC voltmeter
• High accuracy and low noise weigh scale system
• Precision PH measurement system
• Stand-alone display interface controller
• External serial data display module
• Hi-res A/D converter with alphanumeric
display interface
• Temperature monitoring system
• Power Supply
Voltage: 3-5 Vdc (5.5 Vdc max)
Current: 6 mA typical
• Input
Low: -0.3 - 1.0 V
High: 3.5 - 5.3 V
• Output
Low: 0.1 - 0.5 V
High: 3.6 - 4.8 V
• Oscillator
Crystal Freq: 3.6864 MHz typical
Ext Freq: 15 MHz max
• ALD523DPH 28-Pin plastic (PDIP)
• ALD523DSH 28-Pin small outline (SOIC)
• 0 degree to 70 degrees C
(Optional industrial grade also available)
* For special requirements such as different package type, grade
selection, please refer to individual data sheet or contact factory.
Advanced Linear Devices, Inc. 415 Tasman Drive, Sunnyvale, CA 94089 Tel: (408) 747-1144 Fax: (408)747-1286
Ordering Information *
Evaluation and Board Level Product
Part No. Description
MB203PDK PDIP Design Kit
MB203SDK SOIC Design Kit
MB203PCB Printed Circuit Board
Chipset I.C. Product (recommended)
Part No. Operating Mode
ALD500AUPC Mode A, B
ALD500RAU-10PE Mode A
ALD523DPH Mode A, B & C
Chipset Functional Block Diagram
Setup/ 4
Calibration
Memory 1
Functional
Switches
(Optional)
ALD500
Integrating
Analog
Processor
Other 5
Serial
Input
Analog
Input
LCD 2,3
Character
Display
Module
Multifunction
7-digit Serial
Input Display
Module
Controller
ALD523D
NOTES:
1. 1K EEPROM
2. 1 line x 16 character or 2 line x 16 character
3. Also compatible with similar resolution VFD display
4. PC interface for initial setup and calibration modes
5. Other microprocessor or serial data inputs
OPERATING MODES:
A. Calibrated Reference
B. Ratiometric
C. Display Only
Advanced Linear Devices,Inc. develops and
manufactures a full line of precision CMOS
linear integrated circuits, including analog
switches, A/D converters, voltage compara-
tors, operational amplifiers, conventional and
EPAD ®MOSFET transistors.
Most standard devices are available as ASIC
cells for the development of semi-custom
integrated circuits.
ALD also serves customers through expertise
in full custom design engineering, including
device and process development.