Overview
The AD1556AS, produced by Analog Devices Inc., is a digital filter and decimator designed to work in conjunction with the AD1555 sigma-delta modulator. This combination forms a high-performance Analog-to-Digital Converter (ADC) system. The AD1556AS is particularly suited for low-frequency, high dynamic range measurement applications. It features a robust digital filtering capability, which includes various filter configurations and output word rates, making it versatile for different measurement needs. The device is fabricated using Analog Devices’ BiCMOS process, combining high-performance bipolar devices with CMOS transistors, and is available in a 44-lead MQFP package. It operates over a temperature range of –55°C to +85°C, making it suitable for a wide range of environments.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Filter Pass-Band Ripple | -0.05 | - | +0.05 | dB |
| Filter Stop-Band Attenuation (All Filters Except FO = 16 kHz) | -135 | - | - | dB |
| Output Word Rates | 250 SPS | - | 16 kSPS | - |
| Power Dissipation (Typical) | - | 6.2 mW | - | mW |
| Standby Power Dissipation | - | 70 μW | - | μW |
| Operating Temperature Range | -55°C | - | +85°C | °C |
| Package Type | - | 44-lead MQFP | - | - |
Key Features
- Digital Filtering and Decimation: The AD1556AS includes robust digital filtering capabilities with various filter configurations, allowing for flexible output word rates from 250 SPS to 16 kSPS.
- Low Power Consumption: The device features low power dissipation, typically 6.2 mW, and a standby mode of 70 μW, making it ideal for battery-powered systems.
- High Performance: When combined with the AD1555, it forms a high-performance ADC system with high dynamic range and low noise characteristics.
- Temperature Range: Operates over a wide temperature range of –55°C to +85°C, making it suitable for various environmental conditions.
- Package and Fabrication: Packaged in a 44-lead MQFP and fabricated using Analog Devices’ BiCMOS process, combining high-performance bipolar devices with CMOS transistors.
Applications
- Seismic Data Acquisition Systems: The high dynamic range and low noise characteristics make it suitable for seismic data acquisition systems.
- Chromatography: Ideal for applications requiring precise measurement and high sensitivity, such as in chromatography systems.
- Automatic Test Equipment (ATE): Used in ATE due to its high performance and flexibility in measurement configurations.
- Remote Battery-Powered Data Acquisition Systems: The low power consumption makes it ideal for remote battery-powered data acquisition systems.
Q & A
- What is the primary function of the AD1556AS?
The AD1556AS is a digital filter and decimator designed to work with the AD1555 sigma-delta modulator to form a high-performance ADC system.
- What are the output word rates of the AD1556AS?
The output word rates range from 250 SPS to 16 kSPS.
- What is the typical power dissipation of the AD1556AS?
The typical power dissipation is 6.2 mW, with a standby mode of 70 μW.
- What is the operating temperature range of the AD1556AS?
The operating temperature range is from –55°C to +85°C.
- In what package is the AD1556AS available?
The AD1556AS is available in a 44-lead MQFP package.
- What fabrication process is used for the AD1556AS?
The device is fabricated using Analog Devices’ BiCMOS process, combining high-performance bipolar devices with CMOS transistors.
- What are some common applications of the AD1556AS?
Common applications include seismic data acquisition systems, chromatography, automatic test equipment, and remote battery-powered data acquisition systems.
- How does the AD1556AS contribute to the overall performance of the ADC system?
The AD1556AS enhances the overall performance by providing robust digital filtering and decimation, which improves the dynamic range and reduces noise in the ADC system.
- Is the AD1556AS suitable for high-temperature environments?
Yes, it operates over a wide temperature range of –55°C to +85°C, making it suitable for various environmental conditions.
- What is the significance of the low power consumption of the AD1556AS?
The low power consumption makes it ideal for battery-powered systems, extending the battery life and reducing the overall system power requirements.
