Overview
The AD7862AR-2 is a high-speed, low-power, dual 12-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This component operates from a single +5 V supply and is designed for simultaneous sampling and conversion of two channels. It features two successive approximation ADCs, two track/hold amplifiers, an internal +2.5 V reference, and a high-speed parallel interface. The AD7862AR-2 is suitable for various applications requiring precise and rapid analog-to-digital conversion.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12-bit |
| Sampling Rate | 250 kSPS |
| Conversion Time | 4 µs |
| Analog Input Range | 0 V to 2.5 V (AD7862-2), ±10 V (AD7862-10), ±2.5 V (AD7862-3) |
| Supply Voltage | +5 V |
| Power Consumption | 60 mW (typical), 50 µW (power-down mode) |
| Operating Temperature | –40°C to +85°C |
| Package | 28-lead SSOP, SOIC, DIP |
| Overvoltage Protection | Up to ±17 V, ±7 V, or +7 V depending on input range |
Key Features
- Simultaneous sampling and conversion of two channels
- High-speed parallel interface for easy connection to microprocessors
- Low power consumption with automatic power-down mode
- Internal +2.5 V reference
- Overvoltage protection on analog inputs
- Four analog inputs grouped into two channels (A & B)
- Selection of input ranges: 0 V to 2.5 V, ±10 V, ±2.5 V
Applications
- AC Motor Control
- Uninterrupted Power Supplies
- Data Acquisition Systems
- Communications
Q & A
- What is the resolution of the AD7862AR-2?
The AD7862AR-2 has a resolution of 12 bits. - What is the sampling rate of the AD7862AR-2?
The sampling rate is 250 kSPS. - How long does the conversion process take?
The conversion time is 4 µs. - What are the available analog input ranges for the AD7862AR-2?
The available ranges are 0 V to 2.5 V, ±10 V, and ±2.5 V. - What is the supply voltage for the AD7862AR-2?
The supply voltage is +5 V. - What is the typical power consumption of the AD7862AR-2?
The typical power consumption is 60 mW, with a power-down mode of 50 µW. - What is the operating temperature range for the AD7862AR-2?
The operating temperature range is –40°C to +85°C. - What types of packages are available for the AD7862AR-2?
The component is available in 28-lead SSOP, SOIC, and DIP packages. - Does the AD7862AR-2 have overvoltage protection?
Yes, it has overvoltage protection up to ±17 V, ±7 V, or +7 V depending on the input range. - What are some common applications of the AD7862AR-2?
Common applications include AC Motor Control, Uninterrupted Power Supplies, Data Acquisition Systems, and Communications.
