Overview
The ADM1186-2ARQZ from Analog Devices Inc. is an integrated, four-channel voltage monitoring and sequencing device. This IC is designed to monitor and sequence multiple voltage rails, ensuring proper power-up and power-down sequences in various electronic systems. It operates with a power supply voltage range of 2.7 V to 5.5 V and is particularly useful in applications requiring precise voltage monitoring and sequencing.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Supply Voltage (VCC) | 2.7 | 3.3 | 5.5 | V | |
| Comparator Reference Voltage | 0.6 | V | |||
| Comparator Accuracy | 0.8% | Worst-case accuracy | |||
| Enable Output Current (ISINK) | 100 µA | VCC = 1.1 V | |||
| Sequence Complete Pin Output Low Voltage (VSEQ_DONEL) | 0.4 | V | VCC = 2.7 V, ISINK = 2 mA | ||
| Operating Temperature Range | -40 | 85 | °C | ||
| Package Type | 16-Pin QSOP |
Key Features
- Quad voltage up and down sequencer and monitor with programmable timing.
- Four precision comparators (VIN1 to VIN4) monitoring four voltage rails with a 0.6 V reference and 0.8% worst-case accuracy.
- External resistor networks set the undervoltage (UV) trip points for the monitored supply rails.
- Four open-drain enable outputs (OUT1 to OUT4) to enable power supplies.
- Open-drain power-good output (PWRGD) indicating all VINx inputs are above their UV thresholds.
- Open-drain sequence complete pin and bidirectional open-drain fault pin (ADM1186-1 only).
- Capacitor programmable supply sequence time delays and a timeout delay to 5% accuracy at 25°C.
- State machine controls the supply sequencing direction based on UP and DOWN pins.
Applications
- Monitor and alarm functions.
- Up and down power supply sequencing.
- Telecommunication and data communication equipment.
- PCs, servers, and notebook PCs.
Q & A
- What is the operating supply voltage range of the ADM1186-2ARQZ?
The operating supply voltage range is from 2.7 V to 5.5 V.
- How many voltage rails can the ADM1186-2ARQZ monitor?
The ADM1186-2ARQZ can monitor four voltage rails.
- What is the accuracy of the comparators in the ADM1186-2ARQZ?
The comparators have a worst-case accuracy of 0.8%.
- What type of outputs does the ADM1186-2ARQZ have?
The device has four open-drain enable outputs, an open-drain power-good output, and an open-drain sequence complete pin.
- Can the sequence time delays be programmed?
- What is the package type of the ADM1186-2ARQZ?
The package type is a 16-Pin QSOP.
- What is the operating temperature range of the ADM1186-2ARQZ?
The operating temperature range is from -40°C to 85°C.
- How does the state machine control the supply sequencing?
The state machine controls the supply sequencing direction based on the UP and DOWN pins (or UP/DOWN pin for ADM1186-2).
- What are some common applications of the ADM1186-2ARQZ?
- Can multiple devices be cascaded?
