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參數(shù)資料
| 型號： | MIC833BM5 TR |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC COMPARATOR LATCH REF SOT23-5 |
| 標(biāo)準(zhǔn)包裝： | 3,000 |
| 系列： | IttyBitty® |
| 類型： | 帶電壓基準(zhǔn) |
| 元件數(shù)： | 2 |
| 輸出類型： | 開路漏極 |
| 電壓 - 電源，單路/雙路(±)： | 1.5 V ~ 5.5 V |
| 電流 - 輸出（標(biāo)準(zhǔn)）： | 20mA |
| 電流 - 靜態(tài)（最大值）： | 2µA |
| 傳輸延遲（最大）： | 5µs |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | SC-74A，SOT-753 |
| 安裝類型： | 表面貼裝 |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | MIC833BM5TR |
Micrel, Inc.
MIC833
July 2012
6
M9999-070912-B
Applications Information
Output
Since the MIC833 output is an open-drain MOSFET,
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 may be pulled
up as high as 6V regardless of IC supply voltage. See
“Electrical Characteristics.”
Programming the Thresholds
The low-voltage threshold is calculated using:
+
=
R3
R2
R3
R2
R1
V
REF
IN(LO)
Eq. 1
The high-voltage threshold is calculated using:
+
=
R3
R2
R1
V
REF
IN(HI)
Eq. 2
Where VREF = 1.240V for both equations.
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 = RTOTAL. A value such as 1M for RTOTAL is a
reasonable value because it draws minimum current but
has no significant effect on accuracy.
When working with large resistors, a small amount of
leakage current can cause voltage offsets that degrade
system accuracy. The maximum recommended total
resistance from VIN to ground is 3M
Figure 1. Example Circuit
Once the desired trip points are determined, set the
VIN(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:
=
R3
1M
1.24
3.6V
VIN(HI)
Eq. 3
where:
R3 = 344k
Ω
Once R3 is determined, the equation for VIN(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
VIN(LO) threshold allows calculation of the two remaining
resistor values:
+
=
344k
R2
1M
1.24V
3.1V
VIN(LO)
Eq. 4
where:
R2 = 56k
Ω
1M
Ω (R2 R3) = R1
R1 = 600k
Ω
The accuracy of the resistors can be chosen based upon
the accuracy required 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 IC supply voltage. This applies even if
the supply voltage is zero. This permits the situation in
which the IC supply is turned off, but voltage is still
present on the inputs. See “Electrical Characteristics.”
Input Transients
The MIC833 is inherently immune to very short negative
going “glitches.” Very brief transients may exceed the
VIN(LO) threshold without tripping the output.
As shown in Figure 2, the narrower the transient, the
deeper the threshold overdrive that will be ignored by the
MIC833. The graph represents the typical allowable
transient duration for a given amount of threshold
overdrive that will not toggle the output.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MIC833YM5 TR | 功能描述:校驗(yàn)器 IC 1 A Undervoltage Comparator with 1.5% 1.24V Reference, Adjustable Hysteresis, Open-Drain Output in SOT23-5 (Lead Free) RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)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(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel |
| MIC833YM5TR | 制造商:Micrel Inc 功能描述: 制造商:RF Micro Devices Inc 功能描述: |
| MIC833YM5-TR | 功能描述:Comparator with Voltage Reference Open Drain SOT-23-5 制造商:microchip technology 系列:IttyBitty? 包裝:剪切帶（CT） 零件狀態(tài):有效 類型:帶電壓基準(zhǔn) 元件數(shù):2 輸出類型:開路漏極 電壓 - 電源，單/雙（±）:1.5 V ~ 5.5 V 電壓 - 輸入失調(diào)（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）:- CMRR，PSRR（典型值）:- 傳播延遲（最大值）:5μs 滯后:- 工作溫度:-40°C ~ 85°C 封裝/外殼:SC-74A，SOT-753 安裝類型:表面貼裝 供應(yīng)商器件封裝:SOT-23-5 標(biāo)準(zhǔn)包裝:1 |
| MIC834 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:Comparator with Reference Advance Information |
| MIC834BM5 | 制造商:Micrel Inc 功能描述: |
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