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CQ-3202 データシート(PDF) 8 Page - Asahi Kasei Microsystems

部品番号 CQ-3202
部品情報  High-Speed Response Coreless Current Sensor
Download  19 Pages
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メーカー  AKM [Asahi Kasei Microsystems]
ホームページ  http://www.akm.com
Logo AKM - Asahi Kasei Microsystems

CQ-3202 データシート(HTML) 8 Page - Asahi Kasei Microsystems

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[CQ-3202]
016008764-E-00
2016/07
- 8 -
10. Characteristics Definitions
10.1. Sensitivity Vh [mV/A], Zero-current output Voltage Vof [V]
Sensitivity is defined as the slope of the approximate straight line calculated by the least square method,
using the data of VOUT pin voltage (VOUT) when the primary current (IIN) is swept within ±10A.
Zero-current output voltage is defined as the intercept of the approximate straight line above.
10.2. Linearity Error ρ [%F.S.]
Linearity error is defined as the ratio of the maximum error voltage (Vd) to the full scale (F.S.), where Vd is
the maximum difference between the VOUT pin voltage (VOUT) and the approximate straight line
calculated in the sensitivity and zero-current output voltage definition. The primary current (IIN) is swept
within ±10A. Definition formula is shown in below:
ρ = V
d / F.S. × 100
Full scale (F.S.) is defined as F.S. = VsatH(min) - VsatL(max) [V].
Figure 4. Output characteristics of CQ-3202.
10.3. Ratiometric Error of Sensitivity Vh-R [%] and Ratiometric Error of Zero-Current Output Voltage Vof-R
[%F.S.]
Output of CQ-3202 is ratiometric, which means the values of sensitivity (Vh) and zero-current output
voltage (Vof) are proportional to the supply voltage (VDD). Ratiometric error is defined as the difference
between the Vh (or Vof) and ideal Vh (or Vof) when the VDD is changed from 3.3V to VDD1 (2.97V ≤ VDD1
3.63V). Definition formula is shown in below:
Vh-R = 100 × {(Vh(VDD = VDD1) / Vh(VDD = 3.3V)) – (VDD1 / 3.3)} / (VDD1 / 3.3)
Vof-R = 100 × (Vof(VDD = VDD1) – Vof(VDD = 3.3V) × VDD1 / 3.3) / F.S.
Full scale (F.S.) is defined as F.S. = VsatH(min) - VsatL(max).
Approximate straight line
by least square method
|INS| I
IN(A)
VOUT(V)
−|I
NS|
0
F.S.
=2Vh×|INS|
Vd
Actual output voltage
(Peak time: 35ms)


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