PS081 datasheet(35/155 Pages) AMSCO

Nome de Peças	PS081

Descrição Electrónicos	Single Chip Solution for Strain Gauges

PDF	155 Pages

Scroll/Zoom	100%

Fabricante Electrônico	AMSCO [ams AG]

Página de início	http://www.ams.com

Logo

35 / 155 page

acam-messelectronic gmbh - Friedrich-List-Str.4 - D-76297 Stutensee-Blankenloch - Germany - www.acam.de

3-12

PSØ81

3.4.4

Averaging (avrate)

The number of strain gages respectively half bridges connected defines how many discharging cycles

are needed to make one complete ratio measurement:

Half bridge

2 cycles

Full bridge

4 cycles

Quattro bridge

8 cycles

Figure 3.14 Discharge cycles for a complete measurement

Those numbers of cycles for each mode together define 1 sample (avrate=1). This is also the mini-

mum needed for one complete ratio measurement.

3.4.5

Better resolution by averaging

In PS081, the resolution can be increased by internal averaging. The sample size of the averaging

is specified by parameter avrate in register 2. The standard deviation of the result will be improved

by nearly the square root of the sample size. The following picture shows the correlation for a full

bridge:

Figure 3.15 Averaging

Member of the ams Group

PS081 Folha de dados(PDF) 35 Page - ams AG