Overview
The ADM660ARZ, produced by Analog Devices Inc., is a charge-pump voltage converter that utilizes a switched capacitor technique to invert or double the input supply voltage. This device is part of the ADM660/ADM8660 series, which offers flexibility in voltage conversion for various applications. The ADM660ARZ can invert the input supply voltage to generate a negative output voltage or double the input voltage, making it ideal for systems requiring a negative rail in single power supply configurations.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Input Voltage, V+ | 1.5 | - | 7.0 | V | Inverting Mode, LV = Open |
| Output Current | - | - | 100 | mA | Efficiency greater than 80% |
| Quiescent Current | - | 600 | - | μA | - |
| Charge Pump Frequency | - | 25 kHz / 120 kHz | - | - | Selectable |
| Output Voltage Drop | - | 0.3 | - | V | At 30 mA Load |
| Package Options | - | 8-SOIC, 16-TSSOP | - | - | - |
Key Features
- Voltage Inversion and Doubling: The ADM660ARZ can invert the input supply voltage to generate a negative output voltage or double the input voltage.
- Low Power Consumption: The device features a low quiescent current of 600 μA, making it suitable for power-sensitive applications.
- Selectable Charge Pump Frequency: The charge pump frequency can be selected between 25 kHz and 120 kHz.
- External Capacitors: Only two small external capacitors (2.2 μF or 10 μF) are required for the charge pump operation.
- Shutdown Function (ADM8660): Although not applicable to the ADM660ARZ, the ADM8660 variant includes a shutdown function to reduce power consumption further.
- Package Compatibility: Available in 8-lead SOIC and 16-lead TSSOP packages.
Applications
- Handheld Instruments: Ideal for portable devices requiring a negative voltage rail.
- Portable Computers: Suitable for power supply systems in laptops and other portable computers.
- Remote Data Acquisition: Used in remote sensing and data acquisition systems where power efficiency is crucial.
- Op Amp Power Supplies: Can be used to generate the necessary negative voltage supply for operational amplifiers.
Q & A
- What is the primary function of the ADM660ARZ?
The primary function of the ADM660ARZ is to invert or double the input supply voltage using a charge-pump technique.
- What are the input voltage ranges for the ADM660ARZ?
The input voltage range is from +1.5 V to +7 V.
- What is the maximum output current of the ADM660ARZ?
The maximum output current is 100 mA with greater than 80% efficiency.
- What are the package options available for the ADM660ARZ?
The device is available in 8-lead SOIC and 16-lead TSSOP packages.
- Does the ADM660ARZ have a shutdown function?
No, the shutdown function is available in the ADM8660 variant, not the ADM660ARZ.
- What is the quiescent current of the ADM660ARZ?
The quiescent current is 600 μA.
- Can the charge pump frequency be adjusted?
Yes, the charge pump frequency can be selected between 25 kHz and 120 kHz.
- What external components are required for the charge pump operation?
Only two small external capacitors (2.2 μF or 10 μF) are required.
- What are some typical applications of the ADM660ARZ?
Typical applications include handheld instruments, portable computers, remote data acquisition, and op amp power supplies.
- Is the ADM660ARZ pin-compatible with other devices?
Yes, it is pin-compatible with devices like MAX660, MAX665, ICL7660, and LTC1046.
