Datasheet > AS1720

AS1720

更新时间： 2022-10-11 11:51:03

品牌	Logo	应用领域
艾迈斯 - AMSCO		/
页数	文件大小	规格书
12页	566K
描述
Solenoid / Valve Dr iver wi th Cur rent Limi tat ion

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AS1720 数据手册

AS1720

Datasheet ꢀ Detailed Description

Control by pin ENN

When VDDHV is constantly switched on the AS1720 can be controlled by pin ENN. The functionality is the same as for controlling the device via

pin VDDHV. This feature is useful when controlling by a microprocessor is desired.

Because of the internal pullꢀup resistor to VDDA a microprocessor with openꢀdrain or with push/pull (max 3.3V) output can be used.

Current Adjust (AS1720A) and Current Limitation (AS1720B)

This block provides the current reference for the output current source. The current is generated by regulating the internal Bandgap voltage to

the pins IE and IH. The external resistors RIE and RIH define the output current and can be expressed as:

-----------

R_{IE ⁄ IH}

(EQ 2)

I_OUT

The temperature coefficient depends on the Bandgap voltage (100ppm/K, box method) and external resistor (in the range of several ppm/K).

The saturation voltage of the output current source for a 100mA current is typical 600mV.

Figure 10. Simplified Circuit of Blocks Current Adjust and Current Source

OUT

Current mirror

1.2V reference

1.2V

PWM & Control

RIH

www.austriamicrosystems.com/SolenoidꢀRelayꢀDriver/AS1720

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型号	品牌	获取价格	描述	数据表
AS1720A	AMSCO	获取价格	Solenoid / Valve Dr iver wi th Cur rent Limi tat ion
AS1720B	AMSCO	获取价格	Solenoid / Valve Dr iver wi th Cur rent Limi tat ion
AS17235	ETC	获取价格	AS17235 User＇s Manual \| User＇s Manual[11/1999
AS172-73	SKYWORKS	获取价格	PHEMT GaAs IC Transfer Switch DC-2 GHz
AS172-73_05	SKYWORKS	获取价格	PHEMT GaAs IC Transfer Switch 300 kHz-2 GHz
AS172-73LF	SKYWORKS	获取价格	PHEMT GaAs IC Transfer Switch 300 kHz-2 GHz
AS173-73	ALPHA	获取价格	PHEMT GaAs IC High Linearity Positive Control SPDT Switch DC-2 GHz
AS174	TI	获取价格	HEX/QUADRUPLE D-TYPE FLIP-FLOPS WITH CLEAR
AS1741	AMSCO	获取价格	High-Speed, Low-Voltage, Single-Supply, 0.8,Dual SPST Analog Switches
AS1741_1	AMSCO	获取价格	High-Speed, Low-Voltage, Single-Supply, 0.8,Dual SPST Analog Switches