ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-1000 Series
Rev.2.3_00
2. 3 Temperature characteristics of hysteresis voltage
The temperature changes of the hysteresis voltage is expressed as
follows:
∆ + VDET ∆ − VDET
−
and is calculated as
∆Ta
∆Ta
∆ + VDET ∆ − VDET
VHYS
− VDET
∆ − VDET
∆Ta
−
=
×
∆Ta
∆Ta
Standard Circuit
R*1
100 kΩ
VDD
VSS
OUT
*1. R is unnecessary for CMOS output products.
Figure 17
Caution The above connection diagram and constants do not guarantee correct operation. Perform sufficient
evaluation using the actual application to set the constants.
Explanation of Terms
1. Detection voltage (−VDET), release voltage (+VDET
)
The detection voltage (−VDET) is a voltage at which the output turns to “L”. The detection voltage varies slightly among
products of the same specification. The variation of detection voltage between the specified minimum (−VDET) Min. and the
maximum (−VDET) Max. is called the detection voltage range (Refer to Figure 18).
Example: For the S-1000C15, the detection voltage lies in the range of 1.485 ≤ (−VDET) ≤ 1.515.
This means that some S-1000C15s have 1.485 V for −VDET and some have 1.515 V.
The release voltage is a voltage at which the output turns to “H”. The release voltage varies slightly among products of
the same specification. The variation of release voltages between the specified minimum (+VDET) Min. and the maximum
(+VDET) Max. is called the release voltage range (Refer to Figure 19). The range is calculed from the actual detection
voltage (−VDET) of a product and is expressed by −VDET × 1.03 ≤ +VDET ≤ −VDET × 1.07.
Example: For the S-1000C15, the release voltage lies in the range of 1.530 ≤ (+VDET) ≤ 1.621.
This means that some S-1000C15s have 1.530 V for +VDET and some have 1.621 V.
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