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參數資料
| 型號： | MAX9042BESA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | Micropower, Single-Supply, SOT23 Comparator + Precision Reference ICs |
| 中文描述： | DUAL COMPARATOR, 9000 uV OFFSET-MAX, 450 ns RESPONSE TIME, PDSO8 |
| 封裝： | 0.150 INCH, MS-012AA, SOIC-8 |
| 文件頁數： | 10/12頁 |
| 文件大?。?/td> | 162K |
| 代理商： | MAX9042BESA |
M
3) In this example, let V
CC
= +5V and V
REF
= +2.5V.
and
4) Select R2. In this example, we will choose 1k
.
5) Select V
HYS
. In this example, we will choose 50mV.
6) Solve for R1.
where R1
≈
100k
, V
TH
= 2.525V, and V
TL
= 2.475V.
Board Layout and Bypassing
Power-supply bypass capacitors are not typically need-
ed, but would be called for in cases where supply
impedance is high, supply leads are long, or excessive
noise is expected on the supply lines. Use 100nF
bypass capacitors under these conditions. Minimize
signal trace lengths to reduce stray capacitance.
Reference Output/Load Capacitance
The MAX904_/MAX905_ do not require an output
capacitor on REF for frequency stability. They are sta-
ble for capacitive loads up to 4.7nF. However, in appli-
cations where the load or the supply can experience
step changes, an output capacitor will reduce the
amount of overshoot (or undershoot) and assist the cir-
cuit’s transient response. When an application is not
subject to transient conditions, the REF capacitor can
be omitted.
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 dig-
ital output signal. Be sure to choose R1 and C1 so that
where f
CAR
is the fundamental carrier frequency of the
digital data stream.
Chip Information
MAX9040/41/50/51 TRANSISTOR COUNT: 204
MAX9042/43/52/53 TRANSISTOR COUNT: 280
f
1
2 R1C1
CAR
>>
0 050
.
5
1000
1 1000
R
=
V
V
R
+
R
R
HYS
CC
=
2
1
2
V
R
+
R
R
TL
=
2.
2
1
2
V
R
+
R
R
TH
=
+
2 5
.
2 5
.
2
1
2
Micropower, Single-Supply,
SOT23 Comparator + Precision Reference ICs
10
______________________________________________________________________________________
MAX9040
–
9043
MAX9050
–
9053
OUT
IN+
IN-
10k
0.1μF
V
CC
V
IN
V
EE
V
CC
Figure 2. Time Averaging of the Input Signal for Data Recovery
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX9042BESA+ | 功能描述:校驗器 IC uPower Comparator + Prec Reference IC 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 |
| MAX9042BESA+T | 功能描述:校驗器 IC uPower Comparator + Prec Reference IC 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 |
| MAX9042BESA-T | 功能描述:校驗器 IC uPower Comparator + Prec Reference IC 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 |
| MAX9042BEUA | 功能描述:校驗器 IC 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 |
| MAX9042BEUA+ | 功能描述:校驗器 IC uPower Comparator + Prec Reference IC 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 |
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