Overview
The Texas Instruments ADS8321E/2K5 is a 16-bit, high-speed, micropower sampling analog-to-digital converter (ADC). This device operates over a supply range of 4.75V to 5.25V and is designed for low power consumption, making it ideal for portable and battery-operated systems. The ADS8321E/2K5 features a synchronous serial (SPI/SSI compatible) interface and a differential input, with the ability to set the reference voltage within the range of 500mV to VCC/2. It is fabricated on a 0.6µ CMOS process, allowing for high-speed conversions while maintaining low power dissipation.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Resolution | Number of bits | 16 bits |
| Supply Voltage Range | VCC range | 4.75V to 5.25V |
| Conversion Rate | Maximum sampling frequency | 100 kHz |
| Interface | Type of serial interface | SPI/SSI compatible |
| Input Type | Analog input configuration | Differential |
| Reference Voltage Range | Range of external reference voltage | 500mV to VCC/2 |
| Package | Physical package type | VSSOP-8 (or MSOP-8 for some variants) |
| Operating Temperature Range | Specified performance temperature range | –40°C to +85°C |
| Power Dissipation | Maximum power consumption at 100kHz | < 5.5 mW |
| Integral Linearity Error | Maximum error in integral linearity | ±0.018% of FSR (Full Scale Range) |
Key Features
- Low Power Consumption: The ADS8321E/2K5 is designed to operate with very low power, especially at lower data rates, with an average power dissipation of less than 1mW at a 10kHz data rate.
- High-Speed Conversion: Capable of converting at up to 100,000 conversions per second.
- Differential Input: Supports both single-ended and differential analog input configurations.
- Flexible Reference Voltage: The external reference voltage can be set to any level within the range of 500mV to VCC/2.
- SPI/SSI Compatible Interface: Communicates with microprocessors and other digital systems via a synchronous 3-wire serial interface.
- Small Package Size: Available in a compact VSSOP-8 or MSOP-8 package, making it suitable for space-constrained applications.
Applications
- Portable and Battery-Operated Systems: Ideal due to its ultra-low power consumption and small size.
- Remote Data Acquisition Modules: Suitable for remote sensing and data collection applications.
- Simultaneous Multi-Channel Systems: Can be used in systems requiring multiple channels of analog-to-digital conversion.
- Isolated Data Acquisition: Applicable in isolated data acquisition systems where low power and high accuracy are required.
Q & A
- What is the resolution of the ADS8321E/2K5 ADC?
The resolution of the ADS8321E/2K5 is 16 bits.
- What is the operating supply voltage range for the ADS8321E/2K5?
The operating supply voltage range is 4.75V to 5.25V.
- What is the maximum sampling frequency of the ADS8321E/2K5?
The maximum sampling frequency is 100 kHz.
- What type of serial interface does the ADS8321E/2K5 use?
The ADS8321E/2K5 uses a synchronous serial (SPI/SSI compatible) interface.
- What is the range of the external reference voltage for the ADS8321E/2K5?
The external reference voltage can be set to any level within the range of 500mV to VCC/2.
- What is the typical power consumption of the ADS8321E/2K5 at a 10kHz data rate?
The average power dissipation is less than 1mW at a 10kHz data rate.
- What package types are available for the ADS8321E/2K5?
The ADS8321E/2K5 is available in VSSOP-8 or MSOP-8 packages.
- What is the operating temperature range for the ADS8321E/2K5?
The specified performance temperature range is –40°C to +85°C.
- How does the power dissipation of the ADS8321E/2K5 scale with conversion rate?
The power dissipation scales directly with the conversion rate.
- What are some common applications for the ADS8321E/2K5?
Common applications include portable and battery-operated systems, remote data acquisition modules, simultaneous multi-channel systems, and isolated data acquisition.
