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OA1MPA Datasheet(PDF) 19 Page - STMicroelectronics

Part # OA1MPA
Description  Medical instrumentation
PDF  28 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

OA1MPA Datasheet(HTML) 19 Page - STMicroelectronics

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DocID025992 Rev 1
19/28
OA1MPA, OA2MPA, OA4MPA
Application information
28
4.6
Initialization time
The OA1MPA, OA2MPA, and OA4MPA series of devices use a proprietary trimming
topology that is initiated at each device power-up and allows excellent Vio performance to be
achieved. The initialization time is defined as the delay after power-up which guarantees
operation within specified performances. During this period, the current consumption (ICC)
and the input offset voltage (Vio) can be different to the typical ones.
Figure 22. Initialization phase
The initialization time is VCC and temperature dependent. Table 7 sums up the
measurement results for different supply voltages and for temperatures varying from -40 °C
to 125 °C.
4.7
PCB layouts
For correct operation, it is advised to add a 10 nF decoupling capacitors as close as
possible to the power supply pins.
Table 7. Initialization time measurement results
VCC (V)
Temperature: -40 °C
Temperature: 25 °C
Temperature: 125 °C
Tinit (ms)
ICC phase 1 (mA)
Tinit (ms)
ICC phase 1 (mA)
Tinit (ms)
ICC phase 1 (mA)
1.8
37
0.33
3.2
0.40
0.35
0.46
3.3
2.9
1.4
0.95
1.3
0.34
1.2
5
2.4
3.2
0.85
2.4
0.31
2.9



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