Current generators characteristics

STP16CPC26

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Doc ID 18469 Rev 4

9.2

Current accuracy

A typical current accuracy of ±1% (±3% maximum) between channels is guaranteed at 22

mA and 55 mA output current (refer to

Table 6) and ± 6% (maximum) current accuracy

between ICs.

9.3

Generators voltage drop

In order to correctly regulate the current, a minimum dropout voltage must be assured

across the current generators.

Figure 17 and Table 9 provides just an indicative idea about the dropout voltage to assure

over the current range. However it is recommended to use value of V

DROP

slightly higher

than those indicated in

Figure 17 and Table 9.

Figure 17.

Dropout voltage vs output current

Table 9.

Dropout voltage vs output current

Output current [mA]

544

44

10

85

85

20

170

170

40

350

330

60

530

500

90

820

770