Overview
The AD7859LASZ-REEL is a high-performance, low-power, 8-channel, 12-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is optimized for low power consumption and is part of the AD7859 series, which includes variants optimized for different performance criteria. The AD7859LASZ-REEL operates from a single 3 V or 5 V power supply and is designed for applications requiring high accuracy and low power dissipation.
Key Specifications
| Parameter | Value | Units | Comments |
|---|---|---|---|
| Number of Channels | 8 | ||
| Number of Bits | 12 | ||
| Sampling Rate | 100 kSPS | ||
| Polarity | Bipolar, Unipolar | ||
| Integral Nonlinearity (INL) | 1 LSB | ||
| Differential Nonlinearity | 1 LSB | ||
| Signal to Noise + Distortion Ratio (SNR) | 70 dB min | VIN = 10 kHz Sine Wave, fSAMPLE = 100 kHz | |
| Total Harmonic Distortion (THD) | -78 dB max | VIN = 10 kHz Sine Wave | |
| Input Voltage Range | 0 to VREF (unipolar), –VREF/2 to +VREF/2 about VREF/2 (bipolar) | ||
| Power Supply | 3 V or 5 V | ||
| Power Consumption (Normal Operation) | 5.5 mW (VDD = 3 V) | ||
| Power Consumption (Power-Down Mode) | 650 µW (VDD = 3 V) | ||
| Package Type | 44-Pin PQFP or PLCC |
Key Features
- Operation with either 3 V or 5 V power supplies.
- Flexible power management options, including automatic power-down after conversion.
- Self and system calibration for accurate operation over time and temperature.
- Versatile parallel I/O port with 16-bit or 8-bit parallel interface options.
- Low power consumption, with typical power dissipation of 5.5 mW in normal operation and 650 µW in power-down mode.
- Input track-and-hold acquires a signal in 500 ns with a pseudo-differential sampling scheme.
- Reference voltages from 1.2 V to the supply voltage are supported.
Applications
- Battery-powered systems, such as personal digital assistants and medical instruments.
- Mobile communications and high-speed modems.
- Instrumentation and control systems.
- Pen computers and other portable devices.
Q & A
- What is the sampling rate of the AD7859LASZ-REEL?
The AD7859LASZ-REEL has a sampling rate of 100 kSPS.
- What are the power supply options for this ADC?
The AD7859LASZ-REEL can operate with either a 3 V or 5 V power supply.
- What is the typical power consumption in normal operation?
The typical power consumption in normal operation is 5.5 mW at 3 V supply.
- Does the AD7859LASZ-REEL support self-calibration?
Yes, the AD7859LASZ-REEL supports both self and system calibration.
- What is the input voltage range for this ADC?
The input voltage range is 0 to VREF (unipolar) and –VREF/2 to +VREF/2 about VREF/2 (bipolar).
- What types of packages are available for the AD7859LASZ-REEL?
The device is available in 44-pin PQFP and PLCC packages.
- What is the signal to noise + distortion ratio (SNR) of the AD7859LASZ-REEL?
The SNR is typically 70 dB min at VIN = 10 kHz Sine Wave and fSAMPLE = 100 kHz.
- How does the power-down feature work?
The device features automatic power-down after conversion, significantly reducing power consumption during idle periods.
- What are some common applications for the AD7859LASZ-REEL?
Common applications include battery-powered systems, mobile communications, instrumentation, and control systems.
- What is the input track-and-hold acquisition time?
The input track-and-hold acquires a signal in 500 ns.
