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參數(shù)資料
| 型號(hào)： | AS1745G-T |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類： | 數(shù)據(jù)轉(zhuǎn)換 |
| 英文描述： | Dual 4Ω SPDT Switch NO/NC; Package Type: MSOP-10 |
| 中文描述： | DUAL 1-CHANNEL, SGL POLE DOUBLE THROW SWITCH, PDSO10 |
| 封裝： | MSOP-10 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 521K |
| 代理商： | AS1745G-T |
www.austriamicrosystems.com
Revision 1.53
8 - 16
AS1744/AS1745
Data Sheet
- Application Information
9 Application Information
Power-Supply Sequencing
Proper power-supply sequencing is critical for proper operation. The recommended sequence is as follows:
1. V+
2. NO
x,
NC
x,
COM
x
Always apply V+ before applying analog signals, especially if the analog signal is not current-limited. If the above
sequence is not possible, and if the analog inputs are not current-limited to less than 30mA, add a small-signal diode
as shown in
Figure 11
(D1). If the analog signal can dip below GND, add diode D2. Adding these diodes will reduce the
analog range to a diode-drop (about 0.7V) below V+ (for D1), and a diode-drop above ground (for D2).
Note:
Operation beyond the absolute maximum ratings (see page 3) may permanently damage the devices.
Overvoltage Protection
ON-resistance increases slightly at lower supply voltages.
Figure 11. Overvoltage Protection Using 2 External Blocking Diodes
Adding diode D2 to the circuit shown in
Figure 11
causes the logic threshold to be shifted relative to GND. Diodes D1
and D2 also protect against overvoltage conditions.
For example, in the circuit shown in
Figure 11
, if the supply voltage goes below the absolute maximum rating, and if a
fault voltage up to the absolute maximum rating is applied to an analog signal pin, no damage will result.
Note:
The supply voltage (V+) must not exceed the absolute maximum rating of +7V.
Power Supply Bypass
Power supply connections to the devices must maintain a low impedance to ground. This can be done using a bypass
capacitor, which will also improve noise margin and prevent switching noise propagation from the V+ supply to other
components.
Layout Considerations
High-speed switches require proper layout and design procedures for optimum performance.
!
Reduce stray inductance and capacitance by keeping traces short and wide.
!
Ensure that bypass capacitors are as close to the device as possible.
!
Use large ground planes where possible.
AS1744/AS1745
GND
V
GEN
NO
x
D2
D1
V+
V+
COM
x
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AS1745T | 制造商:ACC Silicones Ltd 功能描述:ADHESIVE SILICONE CLEAR 90ML |
| AS1745V-T | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:High-Speed, Low-Voltage, Dual, Single-Supply, 4з, SPDT Analog Switches |
| AS1746 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:0.5/0.6ohm, Low-Voltage, Dual SPDT Analog Switch |
| AS1746_1 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:0.5/0.6, Low-Voltage, Dual SPDT Analog Switch |
| AS1746-BTDR | 功能描述:IC SWITCH DUAL SPDT 10-TDFN RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關(guān)，多路復(fù)用器，多路分解器 系列:- 其它有關(guān)文件:STG4159 View All Specifications 標(biāo)準(zhǔn)包裝:5,000 系列:- 功能:開關(guān) 電路:1 x SPDT 導(dǎo)通狀態(tài)電阻:300 毫歐 電壓電源:雙電源 電壓 - 電源，單路/雙路(±):±1.65 V ~ 4.8 V 電流 - 電源:50nA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:7-WFBGA，F(xiàn)CBGA 供應(yīng)商設(shè)備封裝:7-覆晶 包裝:帶卷 (TR) |
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