13 FN6973.5 October 24, 2013 Overall Accuracy (VOA %)
參數(shù)資料
型號: ISL28005FH50Z-T7
廠商: Intersil
文件頁數(shù): 5/15頁
文件大?。?/td> 0K
描述: IC OPAMP CURRENT SENSE SOT23-5
應(yīng)用說明: ISL28005/06 Application Note
產(chǎn)品培訓(xùn)模塊: ISL28005-6 Overview
Solutions for Industrial Control Applications
標(biāo)準(zhǔn)包裝: 1
放大器類型: 電流檢測
電路數(shù): 1
轉(zhuǎn)換速率: 0.67 V/µs
-3db帶寬: 160kHz
電流 - 輸入偏壓: 4.7µA
電壓 - 輸入偏移: 1200µV
電流 - 電源: 50µA
電流 - 輸出 / 通道: 8.7mA
電壓 - 電源,單路/雙路(±): 2.7 V ~ 28 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: SC-74A,SOT-753
供應(yīng)商設(shè)備封裝: SOT-23-5
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: ISL28005FH50Z-T7DKR
ISL28005
13
FN6973.5
October 24, 2013
Overall Accuracy (VOA %)
VOA is defined as the total output accuracy Referred-to-Output
(RTO). The output accuracy contains all offset and gain errors, at
a single output voltage. Equation 2 is used to calculate the %
total output accuracy.
where
VOUT Actual = VSENSE x GAIN
Example: Gain = 100, For 100mV VSENSE input we measure
10.1V. The overall accuracy (VOA) is 1% as shown in Equation 3.
Power Dissipation
It is possible to exceed the +150°C maximum junction
temperatures under certain load and power supply conditions. It
is therefore important to calculate the maximum junction
temperature (TJMAX) for all applications to determine if power
supply voltages, load conditions, or package type need to be
modified to remain in the safe operating area. These parameters
are related using Equation 4:
where:
PDMAXTOTAL is the sum of the maximum power dissipation of
each amplifier in the package (PDMAX)
PDMAX for each amplifier can be calculated using Equation 5:
where:
TMAX = Maximum ambient temperature
θJA = Thermal resistance of the package
PDMAX = Maximum power dissipation of 1 amplifier
VCC = Total supply voltage
IqMAX = Maximum quiescent supply current of 1 amplifier
VOUTMAX = Maximum output voltage swing of the application
RL = Load resistance
FIGURE 30. TYPICAL APPLICATION CIRCUIT
gmHI
gmLO
1.35V
+
-
OUT
VCC
I = 2.86A
GND
RS
RS-
RP
(1m
TO
0.1)
0.1VDC
TO
28VDC
+
-
CD
LOAD
CM
2.7VDC
TO
28VDC
RS+
V
OA
100
V
OUTactua l
V
OUT
ected
exp
V
OUT
ected
exp
------------------------------------------------------------------------------------
×
=
(EQ. 2)
(EQ. 3)
V
OA
100
10.1
10
10
------------------------
×
1percent
==
T
JMAX
T
MAX
θ
JAxPDMAXTOTAL
+
=
(EQ. 4)
PD
MAX
V
S
I
qMAX
V
S
(
- V
OUTMAX )
V
OUTMAX
R
L
----------------------------
×
+
×
=
(EQ. 5)
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