Overview
The AD7862AR-3 is a high-speed, low-power, 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 AD7862AR-3 operates from a single +5 V supply and features automatic power-down mode, which makes it suitable for battery-powered or portable applications. It is fabricated using Analog Devices’ Linear Compatible CMOS (LC2MOS) process, combining precision bipolar circuits with low-power CMOS logic.
Key Specifications
| Parameter | Value | Units | Test Conditions/Comments |
|---|---|---|---|
| Resolution | 12-bit | - | - |
| Sampling Rate | 250 kSPS | - | - |
| Analog Input Range | ±2.5 V (AD7862-3) | V | - |
| Supply Voltage | +5 V | V | - |
| Power Consumption | 60 mW (typ) | mW | - |
| Aperture Delay | 20 ns (typ) | ns | - |
| Aperture Jitter | 100 ps (typ) | ps | - |
| Aperture Delay Matching | 200 ps (typ) | ps | - |
| Signal to (Noise+Distortion) Ratio | 70 dB (min) @ +25°C | dB | fIN = 100.0 kHz, fS = 250 kSPS |
| Total Harmonic Distortion | -78 dB (min) | dB | fIN = 100.0 kHz, fS = 250 kSPS |
| Operating Temperature Range | -40°C to +85°C | °C | - |
| Package Type | 28-lead SSOP, SOIC, DIP | - | - |
Key Features
- Simultaneous sampling and conversion of two analog input 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.
- Tight aperture delay matching between the two input sample-and-hold amplifiers.
- Internal +2.5 V reference and overvoltage protection on analog inputs.
- Available in three versions with different analog input ranges: ±10 V, ±2.5 V, and 0 V – +2.5 V.
Applications
- Battery-powered or portable applications due to its low power consumption and automatic power-down mode.
- Industrial and medical applications requiring high-speed and precise data acquisition.
- Data acquisition systems where simultaneous sampling of multiple channels is necessary.
- Signal processing applications that require tight aperture delay matching and high signal-to-noise ratio.
Q & A
- What is the resolution of the AD7862AR-3 ADC?
The AD7862AR-3 has a resolution of 12 bits.
- What is the sampling rate of the AD7862AR-3?
The sampling rate of the AD7862AR-3 is 250 kSPS.
- What are the available analog input ranges for the AD7862AR-3?
The AD7862AR-3 is available in three versions with different analog input ranges: ±10 V, ±2.5 V, and 0 V – +2.5 V.
- What is the supply voltage for the AD7862AR-3?
The AD7862AR-3 operates from a single +5 V supply.
- What is the typical power consumption of the AD7862AR-3?
The typical power consumption of the AD7862AR-3 is 60 mW.
- What is the aperture delay of the AD7862AR-3?
The aperture delay of the AD7862AR-3 is typically 20 ns.
- What is the signal-to-noise ratio (SNR) of the AD7862AR-3?
The signal-to-noise ratio (SNR) of the AD7862AR-3 is typically 70 dB at +25°C.
- What is the operating temperature range of the AD7862AR-3?
The operating temperature range of the AD7862AR-3 is -40°C to +85°C.
- What types of packages are available for the AD7862AR-3?
The AD7862AR-3 is available in 28-lead SSOP, SOIC, and DIP packages.
- Does the AD7862AR-3 have overvoltage protection on its analog inputs?
