DA6501.001

27 October 2008

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I

Conversion Result – Read Sequence

Table 5 presents general control sequence for

single register data read.

Table 5. MAS6501 I2C bus single register (address Ax) read sequence bits

S

AW

A

Ax

A

S

AR

A

Dx

N

P

Table 6 presents control sequence for reading the

16-bit A/D conversion result from both MSB and

LSB data registers. LSB register data (DL) can be

read right after MSB register data (DM) read since

in case the read sequence is continued (not ended

to stop condition P) the register address is

automatically incremented to point to next register

address (in this case to point to the LSB data

register).

Table 6. MAS6501 I2C bus MSB (first) and LSB (second) A/D conversion result read sequence

S

AW

A

AM

A

S

AR

A

DM

N

DL

N

P

Accuracy Improvement – Averaging

Averaging technique can be used to remove

conversion error caused by noise and thus improve

measurement accuracy. By accomplishing several

A/D conversions and taking average of the samples

it is possible to average out noise. Theoretically

noise is reduced by factor

N

where N is number

of averaged samples. A/D converter nonlinearities

cannot be removed by averaging.