Datasheet ADG7421F (Analog Devices)
| 制造商 | Analog Devices |
| 描述 | Low Voltage Fault Protection and Detection, 12 Ω RON, Dual SPST Switch |
| 页数 / 页 | 30 / 1 — ADG7421F. FEATURES. FUNCTIONAL BLOCK DIAGRAM. Figure 1. GENERAL … |
| 文件格式/大小 | PDF / 2.0 Mb |
| 文件语言 | 英语 |
ADG7421F. FEATURES. FUNCTIONAL BLOCK DIAGRAM. Figure 1. GENERAL DESCRIPTION. APPLICATIONS. COMPANION PRODUCTS. PRODUCT HIGHLIGHTS
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ADG7421F
Low Voltage Fault Protection and Detection, 12 Ω RON, 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
Figure 1.
► 3 kV HBM ESD rating
GENERAL DESCRIPTION
► Latch-up immune under any circumstance ► ±1.8 V to ±2.5 V dual supply operation The ADG7421F is a low voltage, dual single-pole/single-throw ► 1.8 V to 5.5 V single-supply operation (SPST), low on-resistance switch that features overvoltage protec- tion, power-off protection, and overvoltage detection on the source ► 10-Lead, 3 mm × 2 mm LFCSP pins.
APPLICATIONS
When no power supplies are present, the switch remains in the off condition, and the switch inputs are high impedance. When ► Analog input/output modules powered, if the analog input signal levels on the Sx pins exceed ► Process control/distributed control systems VDD or VSS by a threshold voltage, VT, the switch automatically ► Data acquisition turns off and the digital FF (fault flag) pin drops to a logic low to ► Instrumentation indicate a fault. ► Avionics Input signal levels up to +60 V or −60 V relative to ground ► Automatic test equipment are blocked, in both the powered and unpowered condition. The ► Communication systems switches turn on with a Logic 1 input and conducts equally well in ► Relay replacement both directions with an analog signal range of VSS + 0.1 V to VDD − 0.55 V for a 5 V single supply. The digital input is compatible with
COMPANION PRODUCTS
1.8 V logic inputs over the full operating supply range. ► ADCs: AD7124-4, AD7124-8 The ADG7421F is ideal for providing overvoltage protection for ► Linear Regulator: ADP162 small signals such as resistance temperature device (RTD) inputs (see Figure 56) and thermocouple inputs (see Figure 55). The ► Additional companion products on the ADG7421F product page 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.
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 DOCUMENT FEEDBACK
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
TECHNICAL SUPPORT
registered trademarks are the property of their respective owners. Document Outline Features Applications Companion Products Functional Block Diagram General Description Product Highlights Specifications 5 V Single Supply 3 V Single Supply 1.8 V Single Supply ±2.5 V Dual Supply Continuous Current per Channel, Sx or Dx, Two Channels On Absolute Maximum Ratings Thermal Resistance Electrostatic Discharge (ESD) Ratings ESD Ratings for ADG7421F ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Test Circuits Terminology IDD ISS VD, VS RON RFLAT (ON) IS (Off) ID (Off) ID (On), IS (On) VINL VINH IINL, IINH CD (Off) CS (Off) CD (On), CS (On) CIN tON tOFF tDIGRESP tDIGREC tRESPONSE tRECOVERY Off Isolation Charge Injection −3 dB Bandwidth On Response Insertion Loss THD + N AC Power Supply Rejection Ratio (AC PSRR) VT Theory of Operation Switch Architecture ESD Performance Trench Isolation Overvoltage Fault Protection Power-On Protection Power-Off Protection Overvoltage Interrupt Flag Applications Information Power Supply Rails Power Supply Recommendations Power Supply Sequencing Protection Signal Range Intelligent Fault Detection Short Duration Fault Current Thermocouple Input Protection RTD Input Protection Switches in a Known State High Voltage Suppression Outline Dimensions Ordering Guide
ADG7421F
Low Voltage Fault Protection and Detection, 12 Ω RON, 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
Figure 1.
► 3 kV HBM ESD rating
GENERAL DESCRIPTION
► Latch-up immune under any circumstance ► ±1.8 V to ±2.5 V dual supply operation The ADG7421F is a low voltage, dual single-pole/single-throw ► 1.8 V to 5.5 V single-supply operation (SPST), low on-resistance switch that features overvoltage protec- tion, power-off protection, and overvoltage detection on the source ► 10-Lead, 3 mm × 2 mm LFCSP pins.
APPLICATIONS
When no power supplies are present, the switch remains in the off condition, and the switch inputs are high impedance. When ► Analog input/output modules powered, if the analog input signal levels on the Sx pins exceed ► Process control/distributed control systems VDD or VSS by a threshold voltage, VT, the switch automatically ► Data acquisition turns off and the digital FF (fault flag) pin drops to a logic low to ► Instrumentation indicate a fault. ► Avionics Input signal levels up to +60 V or −60 V relative to ground ► Automatic test equipment are blocked, in both the powered and unpowered condition. The ► Communication systems switches turn on with a Logic 1 input and conducts equally well in ► Relay replacement both directions with an analog signal range of VSS + 0.1 V to VDD − 0.55 V for a 5 V single supply. The digital input is compatible with
COMPANION PRODUCTS
1.8 V logic inputs over the full operating supply range. ► ADCs: AD7124-4, AD7124-8 The ADG7421F is ideal for providing overvoltage protection for ► Linear Regulator: ADP162 small signals such as resistance temperature device (RTD) inputs (see Figure 56) and thermocouple inputs (see Figure 55). The ► Additional companion products on the ADG7421F product page 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.
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 DOCUMENT FEEDBACK
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
TECHNICAL SUPPORT
registered trademarks are the property of their respective owners. Document Outline Features Applications Companion Products Functional Block Diagram General Description Product Highlights Specifications 5 V Single Supply 3 V Single Supply 1.8 V Single Supply ±2.5 V Dual Supply Continuous Current per Channel, Sx or Dx, Two Channels On Absolute Maximum Ratings Thermal Resistance Electrostatic Discharge (ESD) Ratings ESD Ratings for ADG7421F ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Test Circuits Terminology IDD ISS VD, VS RON RFLAT (ON) IS (Off) ID (Off) ID (On), IS (On) VINL VINH IINL, IINH CD (Off) CS (Off) CD (On), CS (On) CIN tON tOFF tDIGRESP tDIGREC tRESPONSE tRECOVERY Off Isolation Charge Injection −3 dB Bandwidth On Response Insertion Loss THD + N AC Power Supply Rejection Ratio (AC PSRR) VT Theory of Operation Switch Architecture ESD Performance Trench Isolation Overvoltage Fault Protection Power-On Protection Power-Off Protection Overvoltage Interrupt Flag Applications Information Power Supply Rails Power Supply Recommendations Power Supply Sequencing Protection Signal Range Intelligent Fault Detection Short Duration Fault Current Thermocouple Input Protection RTD Input Protection Switches in a Known State High Voltage Suppression Outline Dimensions Ordering Guide