Sequencer Circuit ADM1085AKSZ-REEL7
The ADM1085AKSZ-REEL7 is a supervisor IC from Analog Devices' Simple Sequencers® series. It operates with a supply voltage between 2.25V and 3.6V, and offers reliable reset management for power systems. The device is available in small form-factor packages, including 6-TSSOP, SC-88, and SOT-363.
Description
Product parameter
|
Type |
Parameter |
|
Category |
Supervisor Circuit |
|
Manufacturer |
Analog Devices Inc. |
|
Series |
Simple Sequencers® |
|
Mounting Type |
Surface Mount |
|
Package / Case |
6-TSSOP, SC-88, SOT-363 |
|
Pin Count |
6 |
|
Peak Reflow Temperature (°C) |
260 |
|
Number of Functions |
1 |
|
Supply Voltage |
3.3V |
|
Time at Peak Reflow Temperature-Max (s) |
40 |
|
Base Part Number |
ADM1086 |
|
Output Type |
Push-Pull, Totem Pole |
|
Pin Count |
6 |
|
Power Supply Voltage |
2.5V / 3.3V |
|
Channels |
1 |
|
Maximum Supply Voltage |
3.6V |
|
Minimum Supply Voltage |
2.25V |
|
Operating Current |
10μA |
|
Nominal Operating Current |
10μA |
|
Maximum Supply Current |
15μA |
|
Adjustable Threshold |
Yes |
|
Undervoltage Threshold |
560mV |
|
Overvoltage Threshold |
640mV |
|
Height |
1mm |
|
Length |
2.2mm |
|
Width |
1.35mm |
Features
- The ADM 1085 from ADI is a supervisor circuit, it has other models with similar functions, the picture below shows the order details.
When we look at the ADM1085AKSZ-REEL7, it has several important features:
- Programmable Time Delay:
- Provides adjustable time delays between enable signals, ensuring that voltage regulators or DC-DC converters power up in a specific sequence during system startup.
- Cascadable for Multiple Supplies:
- It Can be cascaded with other power modules to manage the sequencing of multiple power supplies, improving stability in complex systems.
- Wide Voltage Monitoring:
- Capable of monitoring supply voltages as low as 0.6V with adjustable threshold levels, making it versatile for various applications. It has specific undervoltage (560mV) and overvoltage (640mV) thresholds for precise monitoring.
- Flexible Output Options:
- Offers both open-drain output (up to 22V) for ADM1085, providing versatility for different system designs.
- Low Power Consumption:
- Operating with a typical current of 10 μA and a maximum current of 15 μA, this circuit is highly efficient, making it ideal for low-power applications.
- Wide Voltage and Temperature Range:
- With a wide supply voltage range from 2.25V to 3.6V, it operates over a temperature range of –40°C to +125°C.
Application
- Here are two key applications of the ADM1085AKSZ-REEL7:
Power Supply Sequencing:
- This circuit is ideal for managing the sequence of multiple power supplies in systems with voltage regulators and DC-DC converters. It introduces programmable time delays to ensure that the regulators power up in the correct order, helping prevent issues caused by simultaneous power-ups and ensuring stable system operation.
- Power Good Signal Delays:
- In some designs, power sequencing uses "power good" signals once the regulators are on. It provides adjustable delays for these signals, allowing different system parts to power up at staggered times. This helps ensure that each circuit block receives stable power before being enabled.
- These applications make this chip particularly useful in complex multi-supply systems where precise power-up sequencing and reliable operation are critical.
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Q: Why is the ADM1085 used in power supply systems?
A: It is employed to control the sequencing of several power sources, guaranteeing that DC-DC converters or voltage regulators turn on in the proper sequence with modifiable time delays.
Q: What is the circuit's tunable threshold range?
A: With undervoltage detection at 560 mV and overvoltage detection at 640 mV, it enables voltage monitoring with customizable threshold levels.
Q: What is the ADM1085's supply voltage range?
A: It is appropriate for low-voltage applications because it operates within the 2.25V to 3.6V supply voltage range.
Q: Can multiple power supply sequencing be handled by this sequencer circuit?
A: Yes, it can be cascaded with other power modules to manage the sequencing of multiple power supplies in complex systems.
Q: Which output formats does this supervisor IC support?
A: Its push-pull and open-drain output stages give it versatility for a range of system configurations and use.
Q: What are the ADM1085's power consumption characteristics?
A: For low-power applications, it is exceptionally efficient because of its extremely low working current of 10µA and maximum supply current of 15µA.
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