Overview
The ADM8660ARZ, manufactured by Analog Devices Inc., is a CMOS switched-capacitor voltage converter designed to invert the input supply voltage or provide a negative output in single power supply systems. This device is part of the ADM660/ADM8660 family and is particularly noted for its low power consumption and high efficiency.
It features a shutdown function, which allows the device to be disabled, reducing the quiescent current to 300 nA. This makes it ideal for applications where power management is critical.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Input Voltage, V+ | 1.5 | - | 7.0 | V | Inverting Mode, LV = Open |
| Supply Current (No Load) | 0.6 | 1 | - | mA | FC = Open (ADM660), GND (ADM8660) |
| Output Current | - | - | 100 | mA | - |
| Output Resistance | 9 | - | 15 | Ω | IL = 100 mA, TA = 25°C |
| Charge-Pump Frequency | 25 | - | 120 | kHz | FC = Open (ADM660), GND (ADM8660) |
| Quiescent Current (Shutdown) | - | - | 300 | nA | SD High |
Key Features
- Low Power Shutdown: The ADM8660 features a shutdown pin that allows the device to be disabled, reducing the quiescent current to 300 nA.
- High Efficiency: Achieves greater than 90% efficiency for output currents up to 50 mA and greater than 80% efficiency for 100 mA.
- Selectable Charge Pump Frequency: The charge pump frequency can be set to either 25 kHz or 120 kHz.
- Compact Packaging: Available in 8-lead DIP, narrow-body SOIC, and 16-lead TSSOP packages.
- Low Quiescent Current: Operates with a quiescent current of 600 μA to 1 mA under no-load conditions.
Applications
- Handheld Instruments: Suitable for battery-powered devices where power efficiency is crucial.
- Portable Computers: Ideal for generating negative voltage rails in portable computing devices.
- Remote Data Acquisition: Used in remote data acquisition systems where low power consumption is essential.
- Op Amp Power Supplies: Can be used to generate the negative supply voltage required for operational amplifiers in single power supply systems).
Q & A
- What is the primary function of the ADM8660ARZ?
The primary function of the ADM8660ARZ is to invert the input supply voltage, providing a negative output in single power supply systems.
- What are the input voltage ranges for the ADM8660ARZ?
The input voltage ranges from +1.5 V to +7 V).
- What is the maximum output current of the ADM8660ARZ?
The maximum output current is 100 mA).
- What are the available package options for the ADM8660ARZ?
The device is available in 8-lead DIP, narrow-body SOIC, and 16-lead TSSOP packages).
- How does the shutdown function work on the ADM8660ARZ?
The shutdown function disables the charge pump, reducing the quiescent current to 300 nA when the SD pin is high).
- What are the typical applications of the ADM8660ARZ?
Typical applications include handheld instruments, portable computers, remote data acquisition, and op amp power supplies).
- What is the efficiency of the ADM8660ARZ at different output currents?
The device achieves greater than 90% efficiency for output currents up to 50 mA and greater than 80% efficiency for 100 mA).
- Can the charge pump frequency be adjusted on the ADM8660ARZ?
Yes, the charge pump frequency can be set to either 25 kHz or 120 kHz).
- What is the quiescent current of the ADM8660ARZ under no-load conditions?
The quiescent current under no-load conditions is 600 μA to 1 mA).
- Is the ADM8660ARZ RoHS compliant?
Yes, the ADM8660ARZ is RoHS compliant).
