Overview
The AD7859BS, produced by Analog Devices Inc., is a high-speed, low-power, 8-channel, 12-bit analog-to-digital converter (ADC). This component is optimized for speed and is part of the AD7859 series, which includes variants like the AD7859L, optimized for low power. The AD7859BS operates from a single 3 V or 5 V power supply and features self-calibration and system calibration options to ensure accurate operation over time and temperature. It is designed for applications requiring high throughput rates and low power consumption.
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), 5.5 mW (AD7859L at VDD = 3 V) |
| Power Consumption (Power-Down Mode) | 1.3 mW (AD7859 at VDD = 3 V), 650 µW (AD7859L at VDD = 3 V) |
| Input Signal Acquisition Time | 500 ns |
| Package Type | 44-pin PQFP and PLCC |
Key Features
- High-speed operation with a throughput rate of up to 200 kHz.
- Low power consumption with various power-down options.
- Self-calibration and system calibration for accurate operation.
- Pseudo-differential sampling scheme.
- Flexible parallel interface: 16-bit parallel or 8-bit parallel.
- CMOS construction for low power dissipation.
- 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 AD7859BS ADC?
The AD7859BS has a resolution of 12 bits. - How many channels does the AD7859BS support?
The AD7859BS 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 input voltage ranges for the AD7859BS?
The input voltage range is 0 to VREF (unipolar) and –VREF/2 to +VREF/2 about VREF/2 (bipolar). - What are the power supply options for the AD7859BS?
The AD7859BS operates from a single 3 V or 5 V power supply. - How much power does the AD7859BS consume in normal operation?
The AD7859 consumes 15 mW at VDD = 3 V, while the AD7859L consumes 5.5 mW at VDD = 3 V. - What is the input signal acquisition time for the AD7859BS?
The input signal acquisition time is 500 ns. - In what packages is the AD7859BS available?
The AD7859BS is available in 44-pin PQFP and PLCC packages. - Does the AD7859BS support self-calibration?
Yes, the AD7859BS supports self-calibration and system calibration. - What types of interfaces does the AD7859BS offer?
The AD7859BS offers flexible parallel interfaces: 16-bit parallel or 8-bit parallel.
