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參數(shù)資料
| 型號(hào)： | MAX9031AXK+T |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 7/9頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC COMPARATOR SGL SC70-5 |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 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）： | 0.008µA @ 5V |
| 電流 - 靜態(tài)（最大值）： | 55µA |
| CMRR, PSRR（標(biāo)準(zhǔn)）： | 100dB CMRR，100dB PSRR |
| 傳輸延遲（最大）： | 228ns |
| 磁滯： | 4mV |
| 工作溫度： | -40°C ~ 125°C |
| 封裝/外殼： | 6-TSSOP（5 引線），SC-88A，SOT-353 |
| 安裝類型： | 表面貼裝 |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 產(chǎn)品目錄頁(yè)面： | 1391 (CN2011-ZH PDF) |
| 其它名稱： | MAX9031AXK+TDKR |
MAX9030/MAX9031/MAX9032/MAX9034
Low-Cost, Ultra-Small, Single/Dual/Quad
Single-Supply Comparators
7
Maxim Integrated
1) Find the trip points of the comparator using these
formulas:
VTH = VREF + [((VDD - VREF)R2) / (R1 + R2)
VTL = VREF(1 - (R2 / (R1 + R2))]
where VTH is the threshold voltage at which the com-
parator switches its output from high to low as VIN
rises above the trip point. VTL is the threshold volt-
age at which the comparator switches its output from
low to high as VIN drops below the trip point.
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 + 2.5(R2 / (R1 + R2))V
and
VTL = 2.5[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
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:
CAR >> 1 / (2
πR1C1)
where CAR is the fundamental carrier frequency of the
digital data stream.
MAX9031
OUT
IN+
IN-
R2
R1
VIN
VREF
VDD
VSS
VDD
Figure 1. Additional Hysteresis
MAX9031
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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參數(shù)描述 |
|---|---|
| MAX9032 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Low-Cost.Ultra-Small.Single/Dual/Quad Single-Supply Comparators |
| MAX9032AKA | 制造商:Maxim Integrated Products 功能描述:8 PIN COUNT SOT PACKAGE TYPE - Rail/Tube |
| MAX9032AKA+ | 制造商:Maxim Integrated Products 功能描述:COMPARATOR DUAL R-R O/P 2.75V/5.5V 8PIN SOT-23 - Rail/Tube |
| MAX9032AKA+T | 功能描述:校驗(yàn)器 IC Dual 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(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 |
| MAX9032AKA-T | 功能描述:校驗(yàn)器 IC Dual 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(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 |
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