PS081 datasheet(8/155 Pages) AMSCO

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1-3

PSØ81

1-3

PSØ81

2K EEPROM program memory and an integ-

rated 10 kHz oscillator round off the device. A

small amount of external components is sufficient

to build a complete weighing electronic.

The part operates with a power supply from 2.1V

to 3.6V and has a very low current consumption.

As per configuration the current consumption

ranges between 0.005 mA and 0.4 mA approxi-

mately. The update rate is scalable in a wide ran-

ge from < 1 Hz up to 1000 Hz. With a maximum

of mor then 1 million internal divisons (28 bit

ENOB RMS) the resolution lies in the top range

of today’s converters. This high resolution is only

comparable to the one of high-end AD conver-

ters, but at a much lower current consumption.

Equipped with these features, a variety of scale

electronics can be served with PSØ81. On the

resolution side, it allows to build scales with up to

250,000 stable peak-peak divisons (at 2mV/V)!

On the other hand, a sophisticiated power ma-

nagement and the special features of the PICOS-

TRAIN measuring principle can reduce the total

current of the system down to 15 µA, including

the sensor current. This way, it is the first time

possible to build pure solar driven weigh scales

based on metal strain gages. Of course, the

benefits can be combined, e.g. building a high

resolution scale with a low current such as a

legal for trade scale that runs more than 1,500

operating hours with 2x AA batteries.

Throwing a glance at further features like soft-

ware adjustment of the offset and gain compen-

sation or the possibility to operate only one half

bridge reveals that the PSØ81 opens the door to

new and innovative product solutions.

1.5

Functional Block Diagram

Figure 1.1 Block Diagram

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