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參數(shù)資料
| 型號： | AS1972 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 電源管理 |
| 英文描述： | Dual Comparator, Push-Pull; Package Type: MSOP-8 |
| 中文描述： | DUAL COMPARATOR, 7000 uV OFFSET-MAX, 400 ns RESPONSE TIME, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數(shù)： | 10/18頁 |
| 文件大?。?/td> | 752K |
| 代理商： | AS1972 |
www.austriamicrosystems.com
Revision 1.02
10 - 18
AS1970
Data Sheet
- Application Information
9 Application Information
Figure 17
shows a typical application circuit for the AS1970 - AS1975 comparators.
Figure 17. Typical Application Diagram – Threshold Detector
Hysteresis (AS1970/AS1972/AS1974)
The
AS1970/AS1972/AS1974
have 3mV internal hysteresis. Additional hysteresis can be generated with three resis-
tors using positive feedback (
Figure 18
), however this method also slows hysteresis response time.
Figure 18. Additional Hysteresis AS1970/AS1972/AS1974
Resistor Selection Example
For the circuit shown in
Figure 18
, the following steps can be used to calculate values for R
1
, R
2
, and R
3.
1. Select R
3
first. The current through R
3
should be at least 1μA to minimize errors caused by leakage current. The
current through R
3
at the trip point is:
(V
REF
- V
OUT
)/R
3
The two possible output states in solving for R
3
yields these two formulas:
(EQ 1)
R
3
= V
REF
/1μA
R
3
= (V
REF
- V
CC
)/1μA
(EQ 2)
(EQ 3)
For example, for V
REF
= 1.2V and V
CC
= 5V, the two R
3
resistor values are 1.2M
Ω
and 3.8M
Ω
. Use the smaller of
the two resulting resistor values; in this case a standard 1.2M
Ω
resistor should be used for R
3
.
2. Choose the hysteresis band (V
HB
). For this example, use V
HB
= 50mV.
3. Calculate R
1
according to the following equation:
R
1
= R
3
(V
HB
/V
CC
)
(EQ 4)
Substituting the example values for R
3
and
V
HB
gives:
R
1
= 1.2M
Ω
(50mV/5V) = 12k
Ω
AS1970 - AS1975
R
PULLUP
AS1971/AS1973/AS1975 only
V
IN
4
IN-
1
OUT
2
V
CC
5
V
EE
3
IN+
OUT
R
1
R
3
V
CC
V
IN
V
REF
R
2
+
V
EE
V
CC
–
相關PDF資料 |
PDF描述 |
|---|---|
| AS1974 | Quad Comparator, Push-Pull; Package Type: TSSOP-14 |
| AS1975 | Quad Comparator, Open-Drain; Package Type: TSSOP-14 |
| AS1970-T | Single Comparator, Push-Pull; Package Type: SOT23-5 |
| AS1973-T | Dual Comparator. Open-Drain; Package Type: MSOP-8 |
| AS1971-T | Single Comparator, Open-Drain; Package Type: SOT23-5 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AS1972-T | 功能描述:IC COMPARATOR DUAL P/P 8-MSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 比較器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 類型:通用 元件數(shù):1 輸出類型:CMOS，推挽式，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）:5mV @ 5.5V 電流 - 輸入偏壓（最小值）:1pA @ 5.5V 電流 - 輸出（標準）:- 電流 - 靜態(tài)（最大值）:24µA CMRR, PSRR（標準）:80dB CMRR，80dB PSRR 傳輸延遲（最大）:450ns 磁滯:±3mV 工作溫度:-40°C ~ 85°C 封裝/外殼:6-WFBGA，CSPBGA 安裝類型:表面貼裝 包裝:管件 其它名稱:Q3554586 |
| AS1973 | 功能描述:校驗器 IC 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 |
| AS197-306 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:AS197-306:PHEMT GaAs IC High Power SP2T and SP3T S|DC-6 GHz Plastic Packaged and Chip|SPST |
| AS197-306LF | 制造商:SKYWORKS 制造商全稱:SKYWORKS 功能描述:PHEMT GaAs IC High-Power SP2T and SP3T Switch 0.1-2.5 GHz |
| AS1973-T | 功能描述:IC COMPARATOR DUAL O-D 8-MSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 比較器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 類型:通用 元件數(shù):1 輸出類型:CMOS，推挽式，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）:5mV @ 5.5V 電流 - 輸入偏壓（最小值）:1pA @ 5.5V 電流 - 輸出（標準）:- 電流 - 靜態(tài)（最大值）:24µA CMRR, PSRR（標準）:80dB CMRR，80dB PSRR 傳輸延遲（最大）:450ns 磁滯:±3mV 工作溫度:-40°C ~ 85°C 封裝/外殼:6-WFBGA，CSPBGA 安裝類型:表面貼裝 包裝:管件 其它名稱:Q3554586 |
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