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| S1002 Datasheet, PDF (31/39 Pages) Seiko Instruments Inc – VOLTAGE DETECTOR WITH SENSE PIN | |||
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Rev.1.1_00
VOLTAGE DETECTOR WITH SENSE PIN
S-1002 Series
2. Change of detection voltage
If there is not a product with a specified detection voltage value in the S-1002 Series, the detection voltage can be
changed by using a resistance divider or a diode, as seen in Figure 37 to Figure 40.
In Figure 37 and Figure 38, hysteresis width also changes.
VDD
RA
VIN
RB
VDD
SENSE OUT
VSS
R
100 kΩ
VDD
RA
VIN
RB
VDD
SENSE OUT
VSS
GND
Figure 37 Detection voltage change
when using a resistance divider
(Nch open-drain output product)
Remark
Detection voltage =
RA + RB
RB
⢠âVDET
Hysteresis width =
RA + RB
RB
⢠VHYS
VDD
Vf1
VIN
VDD
SENSE OUT
VSS
R
100 kΩ
GND
Figure 38 Detection voltage change
when using a resistance divider
(CMOS output product)
VDD
Vf1
VIN
VDD
SENSE OUT
VSS
GND
Figure 39 Detection voltage change
when using a diode
(Nch open-drain output product)
GND
Figure 40 Detection voltage change
when using a diode
(CMOS output product)
Remark Detection voltage = Vf1 + (âVDET)
Caution 1.
2.
The above connection diagram and constant will not guarantee successful operation.
Perform thorough evaluation using the actual application to set the constant.
Set the constants referring to "2. 1 Error when detection voltage is set externally" in
"ï® Operation".
Seiko Instruments Inc.
31
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