Overview
The ADM1275-3ARQZ-R7, produced by Analog Devices Inc., is a hot-swap controller designed to enable the safe removal or insertion of circuit boards into a live backplane. This component is crucial for power monitoring and control, particularly in high-reliability applications. It features a 12-bit analog-to-digital converter (ADC) for current and voltage readback, accessible via a PMBus interface. The controller includes a current sense amplifier to measure load current through a sense resistor connected to the SENSE+ and SENSE- pins, with adjustable current limits using a resistor divider network linked to the ISET pin.
Key Specifications
| Category | Attribute Value |
|---|---|
| Type | Hot Swap Controller, Monitor |
| Number of Channels | 1 |
| Internal Switch(s) | No |
| Voltage - Supply | 2.95V ~ 20V |
| Current - Supply | 5 mA |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package/Case | QSOP-20 |
Key Features
- Programmable current limit and fault timeout
- Auto retry or latch-off on current fault
- Overvoltage protection (OVP) and undervoltage lockout (UVLO)
- Low dropout voltage for efficient operation
- Suitable for high-frequency switching applications
- Robustness in harsh industrial environments
- Supports high-power handling for demanding applications
- Charge-pumped gate drive for multiple external N-channel FETs
- Foldback for tighter FET SOA protection
- PMBus fast mode compliant interface
- Power-good status output and multifunction GPOs
Applications
- Power monitoring and control/power budgeting
- Central office equipment
- Telecommunication and data communication equipment
- PCs/servers
- Automotive electronics
- In-car entertainment systems
- GPS navigation devices
Q & A
- What is the primary function of the ADM1275-3ARQZ-R7?
The primary function of the ADM1275-3ARQZ-R7 is to act as a hot-swap controller, allowing the safe removal or insertion of circuit boards into a live backplane while monitoring and controlling power levels.
- How does the ADM1275-3ARQZ-R7 measure load current?
The ADM1275-3ARQZ-R7 measures load current using an internal current sense amplifier that detects voltage changes across a sense resistor connected to the SENSE+ and SENSE- pins.
- What is the adjustable current limit range for the ADM1275-3ARQZ-R7?
The current limit can be adjusted from 5 mV to 25 mV using a resistor divider network linked to the ISET pin, with a default limit of 20 mV.
- What interface does the ADM1275-3ARQZ-R7 use for current and voltage readback?
The ADM1275-3ARQZ-R7 uses a PMBus interface for current and voltage readback through its integrated 12-bit ADC.
- What are the operating temperature ranges for the ADM1275-3ARQZ-R7?
The operating temperature range for the ADM1275-3ARQZ-R7 is -40°C to 85°C.
- What types of protection does the ADM1275-3ARQZ-R7 offer?
The ADM1275-3ARQZ-R7 offers overvoltage protection (OVP), undervoltage lockout (UVLO), and foldback for tighter FET SOA protection.
- Can the ADM1275-3ARQZ-R7 be configured for automatic retry or latch-off on current fault?
Yes, the ADM1275-3ARQZ-R7 can be configured for either automatic retry or latch-off on current fault.
- What package types are available for the ADM1275-3ARQZ-R7?
The ADM1275-3ARQZ-R7 is available in a 20-lead QSOP and 20-lead LFCSP package.
- What are some common applications of the ADM1275-3ARQZ-R7?
Common applications include power monitoring and control, central office equipment, telecommunication and data communication equipment, PCs/servers, and automotive electronics.
- Does the ADM1275-3ARQZ-R7 support high-frequency switching applications?
Yes, the ADM1275-3ARQZ-R7 is suitable for high-frequency switching applications.
