Overview
The ADM8828ARTZ-REEL7, produced by Analog Devices Inc., is a switched-capacitor voltage inverter designed to generate a negative supply from a positive input voltage. This component is part of the ADM8828/ADM8829 series and is particularly useful in single power-supply systems where a negative rail is required. The device operates using a charge-pump technique, requiring only two external capacitors for its operation. It features high efficiency, low power consumption, and a shutdown function, making it suitable for a variety of applications.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | +1.5 V to +5.5 V |
| Output Voltage Range | –1.5 V to –5.5 V |
| Output Current (Continuous) | Up to 25 mA |
| Voltage Conversion Efficiency | Greater than 99% |
| Quiescent Current | 600 μA |
| Shutdown Current | 20 nA |
| Operating Temperature Range (Industrial) | –40°C to +85°C |
| Package Type | 6-Lead Small Outline Transistor Package [SOT-23] |
| Power Dissipation | 570 mW (Derate 8.3 mW/°C above +70°C) |
| Thermal Impedance (θJA) | 120°C/W |
Key Features
- High efficiency voltage conversion with greater than 99% efficiency.
- Output currents up to 25 mA.
- Low power shutdown (SHDN) pin for power management.
- Requires only two small external capacitors for operation.
- Compact 6-Lead Small Outline Transistor Package [SOT-23].
- Low quiescent current of 600 μA and shutdown current of 20 nA.
Applications
- Handheld instruments.
- LCD panels.
- Cellular phones.
- PDAs (Personal Digital Assistants).
- Remote data acquisition systems.
- Op Amp power supplies in single power-supply systems.
Q & A
- What is the primary function of the ADM8828ARTZ-REEL7?
The primary function of the ADM8828ARTZ-REEL7 is to generate a negative supply voltage from a positive input voltage using a switched-capacitor technique.
- What is the input voltage range for the ADM8828ARTZ-REEL7?
The input voltage range is from +1.5 V to +5.5 V.
- What is the maximum output current of the ADM8828ARTZ-REEL7?
The maximum output current is up to 25 mA.
- What is the efficiency of the voltage conversion process?
The voltage conversion efficiency is greater than 99%.
- Does the ADM8828ARTZ-REEL7 have a shutdown feature?
Yes, it features a low power shutdown (SHDN) pin.
- What type of package does the ADM8828ARTZ-REEL7 come in?
The component comes in a 6-Lead Small Outline Transistor Package [SOT-23].
- What are the typical applications of the ADM8828ARTZ-REEL7?
Typical applications include handheld instruments, LCD panels, cellular phones, PDAs, remote data acquisition systems, and op amp power supplies.
- What is the operating temperature range for the ADM8828ARTZ-REEL7?
The operating temperature range is from –40°C to +85°C for the industrial version.
- How many external capacitors are required for the operation of the ADM8828ARTZ-REEL7?
Only two small external capacitors are required.
- What is the quiescent current and shutdown current of the ADM8828ARTZ-REEL7?
The quiescent current is 600 μA, and the shutdown current is 20 nA.
