Datasheet > ADG7421F

ADG7421F

更新时间： 2024-09-13 14:58:15

品牌	Logo	应用领域
亚德诺 - ADI		开关
页数	文件大小	规格书
30页	1960K
描述
低电压故障保护和检测、12 Ω RON、双路 SPST 开关

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ADG7421F 数据手册

Data Sheet

ADG7421F

Low Voltage Fault Protection and Detection, 12 Ω R_ON, Dual SPST Switch

FEATURES

FUNCTIONAL BLOCK DIAGRAM

► Overvoltage fault protection up to ±60 V on S1 and S2 pins

► Power-off protection up to ±60 V on S1 and S2 pins

► Overvoltage detection on S1 and S2 pins

► Known state output without digital inputs present

► Low on resistance: 12 Ω typical

► Ultraflat, on resistance: 0.005 Ω typical

► Low fault detection threshold voltage: 0.1 V typical

► 3 kV HBM ESD rating

► Latch-up immune under any circumstance

► ±1.8 V to ±2.5 V dual supply operation

► 1.8 V to 5.5 V single-supply operation

► 10-Lead, 3 mm × 2 mm LFCSP

Figure 1.

GENERAL DESCRIPTION

The ADG7421F is a low voltage, dual single-pole/single-throw

(SPST), low on-resistance switch that features overvoltage protec-

tion, power-off protection, and overvoltage detection on the source

pins.

APPLICATIONS

When no power supplies are present, the switch remains in the

off condition, and the switch inputs are high impedance. When

powered, if the analog input signal levels on the Sx pins exceed

V_DDor V_SSby a threshold voltage, V_T, the switch automatically

turns off and the digital FF (fault flag) pin drops to a logic low to

indicate a fault.

► Analog input/output modules

► Process control/distributed control systems

► Data acquisition

► Instrumentation

► Avionics

Input signal levels up to +60 V or −60 V relative to ground

are blocked, in both the powered and unpowered condition. The

switches turn on with a Logic 1 input and conducts equally well in

both directions with an analog signal range of V_SS+ 0.1 V to V_DD

0.55 V for a 5 V single supply. The digital input is compatible with

1.8 V logic inputs over the full operating supply range.

► Automatic test equipment

► Communication systems

► Relay replacement

−

COMPANION PRODUCTS

The ADG7421F is ideal for providing overvoltage protection for

small signals such as resistance temperature device (RTD) inputs

(see Figure 56) and thermocouple inputs (see Figure 55). The

ability to protect against high voltages up to ±60 V coupled with a

low voltage supply can enable complete low voltage input stages

for industrial applications.

► ADCs: AD7124-4, AD7124-8

► Linear Regulator: ADP162

► Additional companion products on the ADG7421F product page

PRODUCT HIGHLIGHTS

1. Pin S1 and Pin S2 are protected against voltages greater than

the supply rails, up to ±60 V in both powered and unpowered

states.

2. Overvoltage detection with digital output indicates operating

state of switches.

3. Trench isolation guards against latch-up.

4. The ADG7421F can operate from a dual supply range of ±1.8 V

to ±2.5 V or a single-supply range of 1.8 V to 5.5 V.

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable "as is". However, no responsibility is assumed by Analog

Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to

change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

DOCUMENT FEEDBACK

TECHNICAL SUPPORT

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与ADG7421F相关器件

型号	品牌	获取价格	描述	数据表
ADG742BKS	ADI	获取价格	CMOS Low Voltage 2ohm SPST Switches in SC70 Packages
ADG742BKS-R2	ADI	获取价格	1-CHANNEL, SGL POLE SGL THROW SWITCH, PDSO6, MO-203AB, SC-70, 6 PIN
ADG742BKS-R2	ROCHESTER	获取价格	1-CHANNEL, SGL POLE SGL THROW SWITCH, PDSO6, MO-203AB, SC-70, 6 PIN
ADG742BKS-REEL	ROCHESTER	获取价格	1-CHANNEL, SGL POLE SGL THROW SWITCH, PDSO6, MO-203AB, SC-70, 6 PIN
ADG742BKS-REEL	ADI	获取价格	1-CHANNEL, SGL POLE SGL THROW SWITCH, PDSO6, MO-203AB, SC-70, 6 PIN
ADG742BKS-REEL7	ROCHESTER	获取价格	1-CHANNEL, SGL POLE SGL THROW SWITCH, PDSO6, MO-203AB, SC-70, 6 PIN
ADG742BKSZ5-REEL	ADI	获取价格	1-CHANNEL, SGL POLE SGL THROW SWITCH, PDSO5, LEAD FREE, MO-203AA, SC-70, 5 PIN
ADG742BKSZ5-REEL7	ADI	获取价格	CMOS Low Voltage SPST (NC) Switch in SC-70 Package
ADG742BKSZ-R2	ADI	获取价格	CMOS Low Voltage SPST (NC) Switch in SC-70 Package
ADG742BKSZ-R2	ROCHESTER	获取价格	1-CHANNEL, SGL POLE SGL THROW SWITCH, PDSO6, LEAD FREE, MO-203AB, SC-70, 6 PIN

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