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參數(shù)資料
| 型號： | MAX9021AUK+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC COMPARATOR SNGL SOT23-5 |
| 其它有關(guān)文件： | Automotive Product Guide |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 類型： | 通用 |
| 元件數(shù)： | 1 |
| 輸出類型： | CMOS，滿擺幅，TTL |
| 電壓 - 電源，單路/雙路(±)： | 2.5 V ~ 5.5 V，±1.25 V ~ 2.75 V |
| 電壓 - 輸入偏移（最小值）： | 1mV @ 5V |
| 電流 - 輸入偏壓（最小值）： | 0.003µA @ 5V |
| 電流 - 靜態(tài)（最大值）： | 5µA |
| CMRR, PSRR（標(biāo)準(zhǔn)）： | 100dB CMRR，80dB PSRR |
| 傳輸延遲（最大）： | 8µs |
| 磁滯： | 4mV |
| 工作溫度： | -40°C ~ 125°C |
| 封裝/外殼： | SC-74A，SOT-753 |
| 安裝類型： | 表面貼裝 |
| 包裝： | 帶卷 (TR) |
MAX9021/MAX9022/MAX9024
Micropower, Ultra-Small, Single/Dual/Quad,
Single-Supply Comparators
6
_______________________________________________________________________________________
2) The hysteresis band will be:
VHYS = VTH - VTL = VDD(R2 / (R1 + R2))
3) In this example, let VDD = 5V and VREF = 2.5V.
VTH = 2.5V + 2.5V(R2 / (R1 + R2))
and
VTL = 2.5V[(1 - (R2 / (R1 + R2))]
4) Select R2. In this example, we will choose 1k
.
5) Select VHYS. In this example, we will choose 50mV.
6) Solve for R1.
VHYS = VDD(R2 / (R1 + R2))
0.050V = 5(1000
/(R1 + 1000)) V
where R1
≈ 100k, VTH = 2.525V, and VTL = 2.475V.
The above-described design procedure assumes rail-
to-rail output swing. If the output is significantly loaded,
the results should be corrected.
Board Layout and Bypassing
Use 100nF bypass as a starting point. Minimize signal
trace lengths to reduce stray capacitance. Minimize the
capacitive coupling between IN- and OUT. For slow-
moving input signals (rise time > 1ms), use a 1nF
capacitor between IN+ and IN-.
Biasing for Data Recovery
Digital data is often embedded into a bandwidth and
amplitude-limited analog path. Recovering the data can
be difficult. Figure 2 compares the input signal to a
time-averaged version of itself. This self-biases the
threshold to the average input voltage for optimal noise
margin. Even severe phase distortion is eliminated from
the digital output signal. Be sure to choose R1 and C1
so that:
fCAR >> 1 / (2
πR1C1)
where fCAR is the fundamental carrier frequency of the
digital data stream.
MAX9021
OUT
IN+
IN-
R2
R1
VIN
VREF
VDD
VSS
VDD
Figure 1. Additional Hysteresis
MAX9021
OUT
IN+
IN-
10k
0.1
F
VDD
VIN
VSS
VDD
Figure 2. Time Averaging of the Input Signal for Data Recovery
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9021AXK | 制造商:Maxim Integrated Products 功能描述:LOW-POWER ULTRA-SMALL SINGLE-SUPP - Rail/Tube |
| MAX9021AXK+ | 制造商:Maxim Integrated Products 功能描述:COMPARATOR SGL R-R O/P 2.75V/5.5V 5PIN SC-70 - Cut Tape Product |
| MAX9021AXK+T | 功能描述:校驗器 IC Single uPower Comparator 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 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 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 |
| MAX9021AXK-T | 功能描述:校驗器 IC Single uPower Comparator 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 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時間: 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 |
| MAX9022 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Micropower, Ultra-Small, Single/Dual/Quad, Single-Supply Comparators |
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