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參數資料
| 型號： | ADCMP370AKS-RL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | General Purpose Comparators |
| 中文描述： | COMPARATOR, PDSO5 |
| 封裝： | PLASTIC, SC70-5 |
| 文件頁數： | 6/8頁 |
| 文件大?。?/td> | 160K |
| 代理商： | ADCMP370AKS-RL |
ADCMP370/ADCMP371
Preliminary Technical Data
APPLICATIONS INFORMATION
BASIC COMPARATOR
In it’s most basic configuration, a comparator can be used to
convert an analog input signal to a digital output signal. The
analog signal on IN+ is compared to the voltage on IN- and the
voltage at OUT is either high or low depending on whether IN+
is at a higher or lower potential than IN-, respectively.
Rev. PrB | Page 6 of 8
The ADCMP370 and ADCMP371 have different digital output
structures. The ADCMP370 has an open-drain output stage
which requires an external resistor to pull OUT to the logic
high voltage level when the output transistor is switched off.
This voltage level can be as high as 22V. The pull-up resistor
should be large enough to avoid excessive power dissipation, but
small enough to switch logic levels reasonably quickly when the
comparator output is connected to other digital circuitry. A
suitable value would be between 1k
and 10k
. The
ADCMP371 has a push-pull output stage which has an internal
PMOS pull-up and therefore doesn’t require an external resistor.
Faster switching speeds between low and high rails are possible,
but the logic high level is limited to V
CC
.
ADCMP370
OUT
V
CC
V
+
V
REF
V
IN
t
V
+
V
OUT
0V
Figure 12. Basic Comparator and Input and Output Signals
ADDING HYSTERESIS
To prevent oscillations at the output caused by noise or slowly
moving signals passing the switching threshold, positive
feedback can be used to add hysteresis to the differential input.
For the non-inverting configuration, shown in figure 13, two
resistors are used to create different switching thresholds
depending on whether the input signal is increasing or
decreasing in magnitude. When the input voltage is increasing,
the threshold is above V
REF
and when it’s decreasing, the
threshold is below V
REF
.
The upper input threshold level is given by:
(
)
2
1
2
1
V
V
REF
IN_HI
R
R
V
R
R
CC
+
=
The lower input threshold level is given by:
(
)
2
2
1
V
V
REF
IN_LO
R
R
R
+
=
The hysteresis is the difference between these voltage levels:
2
1
V
V
CC
R
IN
R
=
In the example in figure 13, resistors R1 and R2 are chosen to
give 1V hysteresis about the reference of 2.5V, with V
CC
=5V. It’s
important that R
PULL-UP
<<R
LOAD
so that the output high voltage
isn’t pulled below V
CC
.
ADM331
OUT
V
CC
Figure 13. Non-Inverting Comparator Configuration with Hysteresis
相關PDF資料 |
PDF描述 |
|---|---|
| ADCMP371 | General Purpose Comparators |
| ADCMP371AKS-R7 | General Purpose Comparators |
| ADCMP371AKS-RL | General Purpose Comparators |
| ADCMP551 | Single Supply High Speed PECL Comparators |
| ADCMP551BRQ | Single Supply High Speed PECL Comparators |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ADCMP370AKSZ-REEL | 功能描述:IC COMPARATOR OPEN DRAIN SC70-5 RoHS:是 類別:集成電路 (IC) >> 線性 - 比較器 系列:- 標準包裝:25 系列:- 類型:帶電壓基準 元件數:4 輸出類型:CMOS，開路漏極，TTL 電壓 - 電源，單路/雙路(±):2 V ~ 11 V，±1 V ~ 5.5 V 電壓 - 輸入偏移（最小值）:10mV @ 5V 電流 - 輸入偏壓（最小值）:- 電流 - 輸出（標準）:0.015mA @ 5V 電流 - 靜態（最大值）:8.5µA CMRR, PSRR（標準）:80dB CMRR，80dB PSRR 傳輸延遲（最大）:12µs 磁滯:50mV 工作溫度:0°C ~ 70°C 封裝/外殼:16-DIP（0.300"，7.62mm） 安裝類型:通孔 包裝:管件 |
| ADCMP370AKSZ-REEL7 | 功能描述:IC COMPARATOR OPEN-DRAIN SC70-5 RoHS:是 類別:集成電路 (IC) >> 線性 - 比較器 系列:- 標準包裝:1 系列:- 類型:通用 元件數:1 輸出類型:CMOS，開路集電極，TTL 電壓 - 電源，單路/雙路(±):2.7 V ~ 5.5 V 電壓 - 輸入偏移（最小值）:7mV @ 5V 電流 - 輸入偏壓（最小值）:0.25µA @ 5V 電流 - 輸出（標準）:84mA @ 5V 電流 - 靜態（最大值）:120µA CMRR, PSRR（標準）:- 傳輸延遲（最大）:600ns 磁滯:- 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:剪切帶 (CT) 產品目錄頁面:1268 (CN2011-ZH PDF) 其它名稱:*LMV331M5*LMV331M5/NOPBLMV331M5CT |
| ADCMP371 | 制造商:AD 制造商全稱:Analog Devices 功能描述:General-Purpose Comparators |
| ADCMP371AKS-R7 | 制造商:AD 制造商全稱:Analog Devices 功能描述:General Purpose Comparators |
| ADCMP371AKS-REEL | 功能描述:IC COMPARATOR PUSH-PULL SC70-5 RoHS:否 類別:集成電路 (IC) >> 線性 - 比較器 系列:- 標準包裝:25 系列:- 類型:帶電壓基準 元件數:4 輸出類型:CMOS，開路漏極，TTL 電壓 - 電源，單路/雙路(±):2 V ~ 11 V，±1 V ~ 5.5 V 電壓 - 輸入偏移（最小值）:10mV @ 5V 電流 - 輸入偏壓（最小值）:- 電流 - 輸出（標準）:0.015mA @ 5V 電流 - 靜態（最大值）:8.5µA CMRR, PSRR（標準）:80dB CMRR，80dB PSRR 傳輸延遲（最大）:12µs 磁滯:50mV 工作溫度:0°C ~ 70°C 封裝/外殼:16-DIP（0.300"，7.62mm） 安裝類型:通孔 包裝:管件 |
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