CMV2000 datasheet(65/87 Pages) AMSOSRAM

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CMV2000

Functional description

Datasheet

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DS000734

• v8-00 • 2025-Jul-07

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7.6

Configuring on-chip data

7.6.1

Offset and gain

7.6.1.1

Offset

A digital offset can be applied to the output signal. This dark level offset can be programmed

by setting the desired value in the sequencer register. The 14-bit register value is a 2-

complement number, allowing to have a positive and a negative offset (from 8191 to -8192).

The ADC itself has a fixed offset of 70.

So, the dark-

level @ output = 70 + Offset (in 2’s complement). For example, register value

16323 (11 1111 1100 0011) equals -

61 in 2’s complement. The default dark-level is thus set at

70 - 61 = 9 digital numbers.

Table 28: Offset

name

address

Default

value

Description of the value

Offset

100[7:0]

101[5:0]

16323

Defines the dark level offset applied to the output signal (min = 0,

max = 16383).

The value is in 2’s complement:

Decimal

Binary

2’s comp.

00 0000 0000 0000

00 0000 0000 0001

…

8191

01 1111 1111 1111

8191

8192

10 0000 0000 0000

-8192

8193

10 0000 0000 0001

-8191

…

16383

11 1111 1111 1111

-1

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