Overview
The AD7862ARS-3 is a high-performance, dual 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This component is designed for simultaneous sampling and conversion of two analog input channels, making it ideal for applications requiring precise and synchronized data acquisition. The AD7862ARS-3 operates from a single +5 V supply and features low power consumption, with an automatic power-down mode that enhances its suitability for battery-powered or portable devices.
Key Specifications
| Parameter | Value | Units | Test Conditions/Comments |
|---|---|---|---|
| Number of Bits | 12 | - | - |
| Sampling Rate | 250 kSPS | - | - |
| Number of Inputs | 4 | - | Grouped into two channels (A & B) |
| Input Type | Single Ended | - | - |
| Data Interface | Parallel | - | - |
| Configuration | MUX-S/H-ADC | - | - |
| Reference Type | External, Internal | - | - |
| Voltage - Supply, Analog/Digital | 5 V | - | - |
| Operating Temperature | -40°C to +85°C | - | - |
| Package | 28-SSOP | - | 0.209" (5.30mm) Width |
| Signal to (Noise+Distortion) Ratio | 70 dB min | - | fIN = 100.0 kHz, fS = 250 kSPS |
| Total Harmonic Distortion | -78 dB | - | fIN = 100.0 kHz, fS = 250 kSPS |
| Aperture Delay | 20 ns typ | - | - |
| Aperture Jitter | 100 ps typ | - | - |
| Aperture Delay Matching | 200 ps typ | - | - |
Key Features
- Simultaneous Sampling: The AD7862ARS-3 allows for simultaneous sampling and conversion of two analog input channels, preserving the relative phase information of the signals.
- High Speed: The ADC operates at a sampling rate of 250 kSPS, making it suitable for high-speed data acquisition applications.
- Low Power Consumption: The component operates from a single +5 V supply and consumes 60 mW typically, with an automatic power-down mode to reduce power consumption during idle periods.
- High Speed Parallel Interface: Easy connection to microprocessors, microcontrollers, and digital signal processors via a high-speed parallel interface.
- Multiple Input Ranges: Available in versions with different analog input ranges: ±10 V (AD7862-10), ±2.5 V (AD7862-3), and 0 V – +2.5 V (AD7862-2).
- Overvoltage Protection: The analog inputs have overvoltage protection, allowing input voltages to go up to ±17 V, ±7 V, or +7 V without causing damage.
Applications
- Data Acquisition Systems: Ideal for applications requiring simultaneous sampling and conversion of multiple analog channels.
- Industrial Control Systems: Suitable for industrial environments due to its robust specifications and operating temperature range.
- Medical Devices: Can be used in medical devices that require precise and synchronized data acquisition.
- Aerospace and Defense: Applicable in aerospace and defense systems where high reliability and precision are critical.
- Portable and Battery-Powered Devices: The low power consumption and automatic power-down mode make it suitable for battery-powered devices.
Q & A
- What is the sampling rate of the AD7862ARS-3?
The AD7862ARS-3 has a sampling rate of 250 kSPS.
- How many analog input channels does the AD7862ARS-3 have?
The AD7862ARS-3 has four analog inputs grouped into two channels (A & B).
- What is the resolution of the AD7862ARS-3?
The AD7862ARS-3 is a 12-bit ADC.
- What is the operating supply voltage for the AD7862ARS-3?
The AD7862ARS-3 operates from a single +5 V supply.
- What is the package type of the AD7862ARS-3?
The AD7862ARS-3 is available in a 28-SSOP package.
- Does the AD7862ARS-3 have overvoltage protection?
Yes, the AD7862ARS-3 has overvoltage protection on its analog inputs.
- What are the different input range versions available for the AD7862?
The AD7862 is available in versions with input ranges of ±10 V, ±2.5 V, and 0 V – +2.5 V.
- How does the automatic power-down mode work in the AD7862ARS-3?
The automatic power-down mode allows the part to go into power-down once conversion is complete and “wake up” before the next conversion cycle, reducing power consumption.
- What is the signal-to-noise ratio (SNR) of the AD7862ARS-3?
The signal-to-noise ratio (SNR) of the AD7862ARS-3 is 70 dB minimum at fIN = 100.0 kHz and fS = 250 kSPS.
- What is the total harmonic distortion (THD) of the AD7862ARS-3?
The total harmonic distortion (THD) of the AD7862ARS-3 is -78 dB at fIN = 100.0 kHz and fS = 250 kSPS.
