MB203A-TXXXX Advanced Linear Devices Inc, MB203A-TXXXX Datasheet

MB203A-TXXXX

Manufacturer Part Number

MB203A-TXXXX

Description

5 1/2 DIG CUSTOM MB203A DVM BRD

Manufacturer

Advanced Linear Devices Inc

Datasheet

1.MB203PCB.pdf (3 pages)

Specifications of MB203A-TXXXX

Main Purpose

Embedded

Utilized Ic / Part

Primary Attributes

Secondary Attributes

Software

Software Not Included

Lead Free Status / Rohs Status

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ALD500R/ALD523D A/D Converter – Display Module Controller chipset. It features direct 2 x 16 Character

Display Module interface, calibrated analog input (w/scalable input ranges), and digital circuitry to communicate

with PC or other microprocessors. It is designed to be used as a stand-alone, embedded system component in a

variety of applications including digital panel meters, customized instrumentation displays, temperature monitoring,

high resolution DVM’s, weigh scales and others. Direct Full-scale analog input range is +/- 2.00000 V DC with a

linearity of 0.005%. ALD's 18-bit plus sign integrating dual-slope analog processor (ALD500) functions as the input

device and the ALD523D microprocessor IC implements the digital conversion, control mode and I/O functions for

interfacing with a variety of LCD/VFD multi-line Character Display Modules. In addition, the MB203 also drives

and manages a 2 x 16 LCD or VFD Character Display Module.

MB203 supports

configuration, are:

application specific adaptations of the MB203A.

The MB203 board has provision for PC interface, including DOS setup, operating and calibration

software, Basic programming interface modules, and input resistor divider network for input scaling. DC

Inputs are single ended or optionally fully differential, and features automatic zero and automatic input

polarity detection. There are also optional socket/footprints for input pre-amplifier and 2-input differential

input analog switch. A DB25 connector is provided on-board to conveniently interconnect the MB203 to

a personal computer (PC) via the parallel printer port for initial setup and calibration. Standard PC

software is included to configure the ALD523D digital controller chip and establish input scaling and

user-defined alphanumeric "Title and Unit fields" for the display module, which are then uploaded and

stored in the EEPROM on the MB203. Once initial set up and calibration is completed, the MB203 board

only requires a single +5V DC power supply to operate.

Fax: (408) 747-1286

The ALD MB203 is a precision +/- 5 ½-digit Digital Voltmeter (DVM) printed circuit board that contains the

Mode A version- calibrated reference mode.

Mode B version – ratio-metric mode.

Mode C version- display only mode.

Standard Mode A version is available as MB203A. Mode B and Mode C versions are simple

three optional Mode versions, each populated with different components and

Mode C is used for display applications and can be programmed to be compatible

with most industry standard serial binary input data formats — up to 31 serial bits

plus sign bit.

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 ratio-metric reference voltage such

as those required in weigh scale applications.

with direct Character Display Module driver

Single Board Precision DVM

http://www.aldinc.com

MB203

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MB203A-TXXXX Summary of contents

Page 1

... Standard Mode A version is available as MB203A. Mode B and Mode C versions are simple application specific adaptations of the MB203A. The MB203 board has provision for PC interface, including DOS setup, operating and calibration software, Basic programming interface modules, and input resistor divider network for input scaling ...

Page 2

... Accuracy +/- 0.02% (After 2 hour warm-up ) • Linearity of +/- 0.005% full-scale (23ºC, +/- 1ºC). • Logic Compatibility: CMOS inputs and outputs. MB203A20V • Direct Full Scale Analog Input Range: +/- 20.000V • Input Impedance: 10 MEG Ohm nominal • Optional on-board input resistor divider/preamplifier network for wide input voltage ranges. ...

Page 3

... Outline Dimensions: 3.00 in. x 2.95 in. x 0.5 in. • Mounting Holes: 0.125 in. diameter @ 0.125 in from 4 corners • Weight: 1ounce (28 grams) Nominal Ordering Information • ALDMB203A (MODE A, DVM Mode) • ALDMB203Tyyyy where Tyyyy is a Custom Part Number designator • ALDMB203A – xxV (Option) where xx specifies the input voltage range, e.g. xx=20 for +/- 20V input voltage range MB203 © ...

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