AD2026 Intronics, Inc., AD2026 Datasheet

AD2026

Manufacturer Part Number

AD2026

Description

Low Cost 3 Digit ac or Logic Powered DPM

Manufacturer

Intronics, Inc.

Datasheet

1.AD2026.pdf (1 pages)

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Information furnished by Intronics is believed to be accurate and reliable. However, no

responsibility is assumed by Intronics 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 Intronics.

GENERAL DESCRIPTION

The AD2026 is specifically designed to provide a digital

alternative to analog panel meters. The AD2026 is available

either logic powered (+5V dc) or ac line powered. Most of the

analog and digital circuitry is implemented on a single 1

chip, the AD2020. Only 13 additional components are required

to complete the AD2026 +5V dc version. The entire dc version

is mounted on a single 3" X 1 5/8" PCB. AC line power is

achieved with the addition of a second PCB containing the ac

power transformer and power supply circuitry.

The AD2026, on both the ac line and logic powered versions, offers as a

standard feature, 0.56" high LED Displays. Brightness is enhanced on

both versions due to the Red Orange lens. In addition to the Red Orange

lens, the AD2026 is also available with a dark red lens for applications

where maximum brightness is not required and minimum backlighting

is desired.

A unique patented case design utilizes molded-in fingers, both to

capture the PCB in the case and to provide snap-in mounting of the

DPM in a standard panel cutout. No mounting hardware of any kind

is used. The dc version occupies less than 1" of space behind the

panel. The line powered version offers the same mounting features

but occupies 2 1/2" of behind-panel space.

EXCELLENT PERFORMANCE

The AD2026 offers the instrument designer digital accuracy, resolution

and use of readout while occupying less space than its analog

counterpart. Other features of analog meters such as reliability and

instantaneous response are retained in the AD2026.

The AD2026 measures and displays inputs from -99mV to +999mV,

with an accuracy of 0.1% of reading ±l digit. Zero shift is less than one

bit over the full operating temperature range, resulting in the same

performance as a DPM with auto zero. The balanced differential input

of the dc powered AD2026 rejects common mode voltages up to

200mV, enough to eliminate most ground loop problems. The floating

differential input inherent in the ac line powered version offers 1000V

of common mode voltage rejection.

FEATURES

Third Generation 1

Either Line Powered or Logic Powered

Large 0.56" Red Orange LED’s

Balanced Differential Input/Floating 1000v, CMV

Terminal Block Interface (ac Version)

High Reliability: > 250,000 Hour MTBF

Small Size and Weight

Low Cost

L LSI Design

L LSI

Optional 10.0V full scale (F.S.) range is available on the ac line

version that will accept inputs from -0.99V to 9.99V.

WIRING CONNECTIONS

For Balanced Differential operation with the AD2026 dc version,

connect input as shown in Figure 1. The common mode loop must

provide a return path for the bias currents internal to the AD2026.

The resistance of this path must be less than 100k and total

common mode voltages must not exceed 200mV.

For applications where attenuation is required, scaling resistors can

be connected between pins 6 and 7 and between pins F and H. Pin 5

must be used as the High Analog Input when scaling resistors are

used and pin 4 when they are not. Pin E is the Analog Low Input.

Connection to the ac line powered AD2026 is via the terminal strip

on the rear. AC line power is connected to terminals 4 and 5 and the

signal input is connected to terminal I (Analog HI) and 2 (Analog

Ground).

AC or Logic Powered DPM

1400 Providence Highway, Building #2

Norwood, MA 02062

Phone (781) 551-5500

FAX (781) 551-5555

www.intronicspower.com

Low Cost 3 Digit

Figure 1.

AD2026

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