S-1000 Datasheet, PDF (15/38 Pages) Seiko Instruments Inc – ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR

Rev.2.3_00
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-1000 Series
2. 3 Temperature characteristics of hysteresis voltage
The temperature changes of the hysteresis voltage is expressed as ^{∆ + VDET} − ^{∆ − VDET} and is calculated as
∆Ta
∆Ta
follows:
∆ + VDET _− ∆ − VDET ₌ VHYS _× ∆ − VDET
∆Ta
∆Ta − VDET ∆Ta
„ Standard Circuit
VDD
OUT
VSS
R*¹
100 kΩ
*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 (−V_DET), release voltage (+V_DET)
The detection voltage (−V_DET) 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 (−V_DET) Min. and the
maximum (−V_DET) 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 ≤ (−V_DET) ≤ 1.515.
This means that some S-1000C15s have 1.485 V for −V_DET 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 (+V_DET) Min. and the maximum
(+V_DET) Max. is called the release voltage range (Refer to Figure 19). The range is calculed from the actual detection
voltage (−V_DET) of a product and is expressed by −V_DET × 1.03 ≤ +V_DET ≤ −V_DET × 1.07.
Example: For the S-1000C15, the release voltage lies in the range of 1.530 ≤ (+V_DET) ≤ 1.621.
This means that some S-1000C15s have 1.530 V for +V_DET and some have 1.621 V.
Seiko Instruments Inc.
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