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參數資料
| 型號： | MIC841HYC5 |
| 廠商： | MICREL INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | Comparator with Reference |
| 中文描述： | COMPARATOR, 12000 ns RESPONSE TIME, PDSO5 |
| 封裝： | LEAD FREE, SC-70, 5 PIN |
| 文件頁數： | 6/8頁 |
| 文件大小： | 62K |
| 代理商： | MIC841HYC5 |
MIC841/2
Applications Information
Output
The MIC841N and MIC842N outputs are an open-drain
MOSFET, so most applications will require a pull-up resistor.
The value of the resistor should not be too large or leakage
effects may dominate. 470k
is the maximum recommended
value. Note that the output of
“
N
”
version may be pulled up as
high as 6V regardless of the ICs supply voltage. The
“
H
”
and
“
L
”
versions of the MIC841 and MIC842 have a push-pull
output stage, with a diode clamped to V
DD
. Thus, the maxi-
mum output voltage of the
“
H
”
and
“
L
”
versions is V
DD
. See
“
Electrical Characteristics.
”
When working with large resistors on the input to the devices,
a small amount of leakage current can cause voltage offsets
that degrade system accuracy. The maximum recommended
total resistance from V
IN
to ground is 3M
. The accuracy of
the resistors can be chosen based upon the accuracy re-
quired by the system. The inputs may be subjected to
voltages as high as 6V steady-state without adverse effects
of any kind regardless of the ICs supply voltage. This applies
even if the supply voltage is zero. This permits the situation
in which the IC
’
s supply is turned off, but voltage is still present
on the inputs. See
“
Electrical Characteristics.
”
Programming the MIC841 Thresholds
The low-voltage threshold is calculated using:
Micrel
MIC841/2
6
September 2004
Once the desired trip points are determined, set the V
IN(HI)
threshold first.
For example, use a total of 1M
= R1 + R2 + R3. For a typical
single-cell lithium ion battery, 3.6V is a good
“
high threshold
”
because at 3.6V the battery is moderately charged. Solving
for R3:
V
3.6V
1.241M
R3
IN(HI)
=
=
R3
344k
=
Once R3 is determined, the equation for V
IN(LO)
can be used
to determine R2. A single lithium-ion cell, for example, should
not be discharged below 2.5V. Many applications limit the
drain to 3.1V. Using 3.1V for the V
IN(LO)
threshold allows
calculation of the two remaining resistor values.
V
3.1V
1.24
1M
+
R2
344k
IN(LO)
=
=
R2
56k
(
=
1M
R2 R3
R1
)
=
R1 600k
The accuracy of the resistors can be chosen based upon the
accuracy required by the system.
Programming the MIC842 Thresholds
The voltage threshold is calculated using:
V
V
R1 R2
R2
IN(LO)
REF
=
where:
V
1.240V
REF
=
INP
OUT
VDD
GND
MIC842N
470k
V
IN
R1
R2
V
OUT
4
2
1
5
Figure 2. MIC842 Example Circuit
In order to provide the additional criteria needed to solve for
the resistor values, the resistors can be selected such that
they have a given total value, that is, R1 + R2 = R
TOTAL
. A
value such as 1M
for R
TOTAL
is a reasonable value because
it draws minimum current but has no significant effect on
accuracy.
V
V
R1 R2 R3
R2 R3
IN(LO)
REF
=
The high-voltage threshold is calculated using:
V
V
R1 R2 R3
R3
IN(HI)
REF
=
where, for both equations:
V
1.240V
REF
=
In order to provide the additional criteria needed to solve for
the resistor values, the resistors can be selected such that
they have a given total value, that is, R1 + R2 + R3 = R
TOTAL
.
A value such as 1M
for R
TOTAL
is a reasonable value
because it draws minimum current but has no significant
effect on accuracy.
HTH
OUT
VDD
LTH
GND
MIC841N
604k
1%
56k
1%
340k
1%
470k
V
IN
R1
R2
R3
V
OUT
V
DD
5
3
1
4
2
Figure 1. MIC841 Example Circuit
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MIC841HYC5 TR | 功能描述:校驗器 IC 1.5 A Undervoltage Comparator with 1.25% 1.24V Reference, Adjustable Hysteresis, Active-Low Push-Pull Output in SC70-5 (Lead Free) RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MIC841HYC5TR | 制造商:Micrel 功能描述:Comparator Dual 5.5V Micropower |
| MIC841HYC5-TR | 功能描述:Comparator with Voltage Reference Push-Pull SC-70-5 制造商:microchip technology 系列:Teeny?? 包裝:剪切帶（CT） 零件狀態(tài):有效 類型:帶電壓基準 元件數:1 輸出類型:推挽式 電壓 - 電源，單/雙（±）:1.5 V ~ 5.5 V 電壓 - 輸入失調（最大值）:- 電流 - 輸入偏置（最大值）:- 電流 - 輸出（典型值）:20mA 電流 - 靜態(tài)（最大值）:3μA CMRR，PSRR（典型值）:- 傳播延遲（最大值）:50μs 滯后:20mV 工作溫度:-40°C ~ 85°C 封裝/外殼:5-TSSOP，SC-70-5，SOT-353 安裝類型:表面貼裝 供應商器件封裝:SC-70-5 標準包裝:1 |
| MIC841HYMT T5 | 制造商:Micrel Inc 功能描述:IC COMPARATOR MICROPWR 6TDFN |
| MIC841HYMT-T5 | 功能描述:Comparator with Voltage Reference Push-Pull 6-TDFN (1.6x1.6) 制造商:microchip technology 系列:Teeny?? 包裝:剪切帶（CT） 零件狀態(tài):有效 類型:帶電壓基準 元件數:1 輸出類型:推挽式 電壓 - 電源，單/雙（±）:1.5 V ~ 5.5 V 電壓 - 輸入失調（最大值）:- 電流 - 輸入偏置（最大值）:- 電流 - 輸出（典型值）:20mA 電流 - 靜態(tài)（最大值）:3μA CMRR，PSRR（典型值）:- 傳播延遲（最大值）:50μs 滯后:20mV 工作溫度:-40°C ~ 85°C 封裝/外殼:6-UFDFN 裸露焊盤 安裝類型:表面貼裝 供應商器件封裝:6-TDFN（1.6x1.6） 標準包裝:1 |
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