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參數(shù)資料
| 型號： | ADCMP370AKSZ-REEL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 12/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC COMPARATOR OPEN DRAIN SC70-5 |
| 標(biāo)準(zhǔn)包裝： | 10,000 |
| 類型： | 通用 |
| 元件數(shù)： | 1 |
| 輸出類型： | 開路漏極 |
| 電壓 - 電源，單路/雙路(±)： | 2.25 V ~ 5.5 V |
| 電壓 - 輸入偏移（最小值）： | 9mV @ 5.5V |
| 電流 - 輸入偏壓（最小值）： | 0.05µA @ 5.5V |
| 電流 - 靜態(tài)（最大值）： | 7µA |
| 傳輸延遲（最大）： | 5µs |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 6-TSSOP（5 引線），SC-88A，SOT-353 |
| 安裝類型： | 表面貼裝 |
| 包裝： | 帶卷 (TR) |
Data Sheet
ADCMP370/ADCMP371
Rev. C | Page 9 of 12
APPLICATIONS
BASIC COMPARATOR
In its 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.
The ADCMP370 and ADCMP371 have different digital output
structures. The ADCMP370 has an open-drain output stage
that 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 22 V. The same 22 V tolerance
also applies to the inputs of the comparators. 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 is between 1 kΩ and 10 kΩ.
The ADCMP371 has a push-pull output stage, which has an
internal PMOS pull-up and, therefore, does not require an
external resistor. Faster switching speeds between low and high
rails are possible, but the logic high level is limited to VCC.
ADM331
OUT
V+
VREF
t
VOUT
0V
ADCMP370
VCC
V+
VIN
04745-017
VREF
VIN
Figure 18. 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 noninverting configuration, shown in Figure 19,
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 VREF, and when it is decreasing, the
threshold is below VREF.
The upper input threshold level is given by
R2
R1
V
REF
IN_HI
The lower input threshold level is given by
R2
R1
V
R2
R1
V
CC
REF
IN_LO
The hysteresis is the difference between these voltage levels
R2
R1
V
CC
IN
In the example in Figure 19, Resistor R1 and Resistor R2 are
chosen to give 1 V hysteresis about the reference of 2.5 V, with
VCC = 5 V.
ADM331
ADCMP371
VCC = 5V
R2 = 1M
R1 = 200k
VREF = 2.5V
IN+
IN–
VIN
VOUT
VIN
VIN_LO
= 2V
VIN_HI
= 3V
04745-018
OUT
Figure 19. Noninverting ADCMP371 Comparator Configuration with
Hysteresis
With the inverting configuration, the upper and lower
switching thresholds are
R2
R3
R1
R2
V
CC
IN_HI
||
)
(
)
1
(
)
(
1
R3
R2
R
R2
R3
R1
R3
R
R2
V
CC
IN_HI
R3
R2
R1
R3
R2
V
CC
IN_LO
||
)
3
(
)
(
)
3
(
3
2
R
R2
R1
R2
R
R1
R
V
CC
IN_LO
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| 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(biāo)準(zhǔn)包裝:1 系列:- 類型:通用 元件數(shù):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(biāo)準(zhǔn)）:84mA @ 5V 電流 - 靜態(tài)（最大值）:120µA CMRR, PSRR（標(biāo)準(zhǔn)）:- 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(chǎn)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(biāo)準(zhǔn)包裝:25 系列:- 類型:帶電壓基準(zhǔn) 元件數(shù):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(biāo)準(zhǔn)）:0.015mA @ 5V 電流 - 靜態(tài)（最大值）:8.5µA CMRR, PSRR（標(biāo)準(zhǔn)）: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 |
| ADCMP371AKS-REEL7 | 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(biāo)準(zhǔn)包裝:25 系列:- 類型:帶電壓基準(zhǔn) 元件數(shù):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(biāo)準(zhǔn)）:0.015mA @ 5V 電流 - 靜態(tài)（最大值）:8.5µA CMRR, PSRR（標(biāo)準(zhǔn)）: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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