Overview
The AD7859AS-REEL, produced by Analog Devices Inc., is a high-speed, low-power, 12-bit analog-to-digital converter (ADC) designed for a variety of applications requiring high accuracy and low power consumption. This ADC operates from a single 3 V or 5 V power supply and is optimized for speed, with the AD7859 being the faster variant and the AD7859L optimized for low power consumption. The device features self-calibration and system calibration options to ensure accurate operation over time and temperature, and it includes multiple power-down options for low power applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Number of Channels | 8 channels |
| Throughput Rate | 200 kHz (AD7859), 100 kHz (AD7859L) |
| Input Voltage Range | 0 to VREF (unipolar), –VREF/2 to +VREF/2 about VREF/2 (bipolar) |
| Power Supply | Single 3 V or 5 V |
| Power Consumption (Normal Operation) | 15 mW (AD7859 at VDD = 3 V), 5.4 mW (AD7859L at VDD = 3 V) |
| Power Consumption (Power-Down Mode) | 1.3 mW (AD7859 at VDD = 3 V, 10 kSPS), 650 µW (AD7859L at VDD = 3 V, 10 kSPS) |
| Package Type | 44-pin PQFP and PLCC |
| Interface | Flexible Parallel Interface: 16-Bit Parallel/8-Bit Parallel |
Key Features
- High-speed operation with throughput rates up to 200 kHz.
- Low power consumption with multiple power-down options.
- Self-calibration and system calibration for accurate operation over time and temperature.
- Pseudo-differential sampling scheme.
- CMOS construction for low power dissipation.
- Flexible parallel interface supporting 16-bit and 8-bit data transfer.
- On-chip registers for control, status, and calibration.
Applications
- Battery-powered systems (e.g., personal digital assistants, medical instruments, mobile communications).
- Pen computers.
- Instrumentation and control systems.
- High-speed modems.
Q & A
- What is the resolution of the AD7859AS-REEL ADC?
The AD7859AS-REEL has a resolution of 12 bits. - How many channels does the AD7859AS-REEL support?
The AD7859AS-REEL supports 8 channels. - What are the throughput rates of the AD7859 and AD7859L?
The AD7859 has a throughput rate of 200 kHz, while the AD7859L has a throughput rate of 100 kHz. - What are the power supply options for the AD7859AS-REEL?
The AD7859AS-REEL operates from a single 3 V or 5 V power supply. - What are the typical power consumption values for the AD7859 and AD7859L in normal operation?
The AD7859 consumes 15 mW at VDD = 3 V, and the AD7859L consumes 5.4 mW at VDD = 3 V. - What are the package types available for the AD7859AS-REEL?
The AD7859AS-REEL is available in 44-pin PQFP and PLCC packages. - What types of interfaces does the AD7859AS-REEL support?
The AD7859AS-REEL supports a flexible parallel interface with 16-bit and 8-bit data transfer options. - Does the AD7859AS-REEL have calibration options?
Yes, the AD7859AS-REEL includes self-calibration and system calibration options. - What are some typical applications of the AD7859AS-REEL?
Typical applications include battery-powered systems, pen computers, instrumentation and control systems, and high-speed modems. - How does the AD7859AS-REEL manage power consumption in low power applications?
The AD7859AS-REEL includes multiple power-down options to reduce power consumption in low power applications.
