Overview
The AD7863AR-3, manufactured by Analog Devices Inc., is a high-speed, low-power, dual 14-bit analog-to-digital converter (ADC). This component operates from a single 5 V supply and is designed for simultaneous sampling and conversion of two channels. It features two complete ADC functions, each with a two-channel input multiplexer, allowing for the preservation of the relative phase information of the signals on both analog inputs. The AD7863AR-3 is fabricated in Analog Devices' linear compatible CMOS (LC2MOS) process, combining precision bipolar circuits with low-power CMOS logic, making it ideal for battery-powered or portable applications.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 14 |
| Sampling Rate | 175 kSPS |
| Number of Inputs | 4 (grouped into two channels) |
| Input Type | Single Ended |
| Data Interface | Parallel |
| Configuration | MUX-S/H-ADC |
| Ratio - S/H:ADC | 1:1 |
| Number of A/D Converters | 2 |
| Architecture | Successive Approximation (SAR) |
| Reference Type | Internal (2.5 V), External |
| Voltage - Supply, Analog/Digital | 5 V |
| Package | 28-SOIC (0.295", 7.50mm Width) |
| Analog Input Range | ±10 V, ±2.5 V, 0 V to 2.5 V (depending on model variant) |
| Overvoltage Protection | Up to ±17 V, ±7 V, or +7 V (depending on input range) |
Key Features
- Simultaneous sampling and conversion of two channels, preserving relative phase information.
- High-speed parallel interface for easy connection to microprocessors, microcontrollers, and digital signal processors.
- Automatic power-down mode for reduced power consumption, ideal for battery-powered applications.
- Internal 2.5 V reference and high-speed track-and-hold amplifiers.
- Overvoltage protection on analog inputs to prevent damage.
- Low power consumption: 70 mW typical, with a power-saving mode of 105 μW maximum.
Applications
The AD7863AR-3 is suitable for a variety of applications that require high-speed, low-power analog-to-digital conversion. These include:
- Battery-powered or portable devices due to its low power consumption and automatic power-down mode.
- Data acquisition systems where simultaneous sampling of multiple channels is necessary.
- Industrial control systems that require high-speed and accurate analog-to-digital conversion.
- Medical devices that need precise and simultaneous sampling of analog signals.
- Aerospace and defense applications where low power and high reliability are critical.
Q & A
- What is the sampling rate of the AD7863AR-3?
The AD7863AR-3 has a sampling rate of 175 kSPS. - How many analog inputs does the AD7863AR-3 have?
The AD7863AR-3 has four analog inputs grouped into two channels. - What is the resolution of the AD7863AR-3?
The AD7863AR-3 is a 14-bit analog-to-digital converter. - What type of data interface does the AD7863AR-3 use?
The AD7863AR-3 uses a high-speed parallel interface. - Does the AD7863AR-3 have internal voltage reference?
Yes, the AD7863AR-3 has an internal 2.5 V reference. - What is the power supply voltage for the AD7863AR-3?
The AD7863AR-3 operates from a single 5 V supply. - What is the typical power consumption of the AD7863AR-3?
The typical power consumption is 70 mW, with a power-saving mode of 105 μW maximum. - Does the AD7863AR-3 have overvoltage protection?
Yes, the AD7863AR-3 has overvoltage protection on its analog inputs. - What package types are available for the AD7863AR-3?
The AD7863AR-3 is available in 28-lead SOIC and SSOP packages. - What are the common applications of the AD7863AR-3?
The AD7863AR-3 is commonly used in battery-powered devices, data acquisition systems, industrial control systems, medical devices, and aerospace and defense applications.
