Vicom Systems FC-FC3 Manual de usuario descargar pdf (Pagina 38)

CONFIDENTIAL [AK8999A/AW/AD]

MS1600-E-00 2014/05

- 38 -

4) Power Consumption

Current values described in 3) Supply Voltage Current in the Electrical Characteristics are those for the

average current. The maximum current is shown in the table below. Use a power supply with sufficient

supply capacity by referring to this table:

Units VDD:3.6V VDD:5.5V Description

Max. Current mA 6.8 9.5

Reference value

for design

5) Pressure Threshold Detectors 1 and 2

5.1) Pressure Threshold Detector's Detection Threshold

The internal and external detection threshold setup for the pressure threshold detectors 1 and 2 is

described.

Block diagram of the pressure threshold detectors 1 and 2:

The detection threshold of the pressure threshold detector 1 can be set either through the external input

(DET/PTH pin) or internal setup (EEPROM setup EPT1[4:0]). The detection threshold of the pressure

threshold detector 2 can be only set the internal setup (EEPROM setup EPT2[4:0]).

5.2) Pressure Threshold Detector's hysteresis voltage

The relation between the hysteresis voltage and the detection voltage of the pressure threshold

detectors 1 and 2 is described

The hysteresis voltage related with the detection threshold voltage of the pressure threshold detectors 1

and 2 is as follows by the detection threshold setup (EEPROM setup EIN1L[0], EIN2L[0]).

Detect pressure above threshold : Detection threshold – Hysteresis voltage

Detect pressure below threshold : Detection threshold + Hysteresis voltage

In addition, same as the detection threshold of the pressure threshold detectors 1 and 2, the setting range of

“Detection threshold ± Hysteresis voltage” should be set between from 0.125*VDD to 0.9*VDD.

DET1

LOGIC

VOUT

EIN1L[1:0]

EIN2L[1:0]

DET2/

PTH

Threshold EEPROM

：EPT2[3:0]

Threshold EEPROM

：EPT1[3:0]

EPTH1[0]

DET1/2

Control

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Vicom Systems FC-FC3 Manual de usuario Pagina 38