Overview
The AD7851AR is a high-speed, 14-bit analog-to-digital converter (ADC) manufactured by Analog Devices Inc. This device operates from a single 5 V power supply and is designed for high-performance applications. It features self-calibration and system calibration options to ensure accurate operation over time and temperature. The AD7851AR powers up with default conditions and can be operated as a read-only ADC, making it versatile for various uses.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 14 bits | |
| Throughput Rate | 333 kSPS (A Grade), 285 kSPS (K Grade) | |
| Input Voltage Ranges | 0 V to VREF, –VREF/2 to +VREF/2 centered about VREF/2 | |
| Power Supply | Single 5 V | |
| Power Consumption | 60 mW (typical), 5 μW (power-down mode) | |
| Conversion Time | 2.78 μs to 3.25 μs | |
| Track-and-Hold Acquisition Time | 0.33 μs | |
| Package Types | 24-Lead PDIP, SOIC, SSOP | |
| Operating Temperature Range | –40°C to +85°C |
Key Features
- High-speed operation with a throughput rate of up to 333 kSPS
- Pseudo-differential input with two input voltage ranges
- Self-calibration and system calibration options
- Low power consumption: 60 mW typical, 5 μW in power-down mode
- Flexible serial interface: 8051/SPI/QSPI/μP compatible
- Read/write capability of calibration data
- Output coding in straight (natural) binary for unipolar input range and two's complement for bipolar input range
Applications
- Digital Signal Processing
- Speech Recognition and Synthesis
- Spectrum Analysis
- DSP Servo Control
- Instrumentation and Control Systems
- High Speed Modems
- Automotive Systems
Q & A
- What is the resolution of the AD7851AR ADC?
The AD7851AR has a resolution of 14 bits. - What is the maximum throughput rate of the AD7851AR?
The maximum throughput rate is 333 kSPS for the A Grade and 285 kSPS for the K Grade. - What are the input voltage ranges for the AD7851AR?
The input voltage ranges are 0 V to VREF and –VREF/2 to +VREF/2 centered about VREF/2. - What is the power supply requirement for the AD7851AR?
The AD7851AR operates from a single 5 V power supply. - How much power does the AD7851AR consume?
The typical power consumption is 60 mW, and it reduces to 5 μW in power-down mode. - What is the conversion time of the AD7851AR?
The conversion time ranges from 2.78 μs to 3.25 μs. - What are the package types available for the AD7851AR?
The AD7851AR is available in 24-Lead PDIP, SOIC, and SSOP packages. - What is the operating temperature range of the AD7851AR?
The operating temperature range is –40°C to +85°C. - Does the AD7851AR support self-calibration?
Yes, the AD7851AR supports self-calibration and system calibration. - What types of serial interfaces does the AD7851AR support?
The AD7851AR supports 8051/SPI/QSPI/μP compatible serial interfaces.
