Overview
The ADS8321E/2K5G4, produced by Texas Instruments, is a 16-bit, high-speed, microPower sampling analog-to-digital converter (ADC). This device is designed for low power consumption and high performance, making it ideal for battery-operated systems, remote data acquisition, isolated data acquisition, and simultaneous multi-channel systems. The ADS8321 operates over a supply range of 4.75V to 5.25V and features a synchronous serial (SPI/SSI compatible) interface. It is fabricated on a 0.6µ CMOS process, enabling it to acquire and convert analog signals at up to 100,000 conversions per second while consuming less than 5.5mW from the power supply.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Resolution | 16 | Bits | ||
| Analog Input Full-Scale Span | VREF | VREF | V | |
| Absolute Input Range | -0.1 VCC + 0.1 | -0.1 + 4.0 | V | |
| Integral Linearity Error | ±0.018 | ±0.012 | % of FSR | |
| Offset Error | ±0.4 | ±1 | mV | |
| Gain Error | ±0.05 | ±0.024 | % | |
| Sampling Rate | 100 | kHz | ||
| Power Dissipation at 100kHz | 4.5 | 5.5 | mW | |
| Power Dissipation at 10kHz | 1 | mW | ||
| Power Down Current | 3 | µA | ||
| Package | MSOP-8 |
Key Features
- 16-bit resolution with high-speed sampling up to 100kHz
- MicroPower consumption: 4.5mW at 100kHz and 1mW at 10kHz
- Power-down mode with a maximum current of 3µA
- Synchronous serial (SPI/SSI compatible) interface
- Differential input with bipolar input range
- External reference voltage range of 500mV to VCC/2
- MSOP-8 package, pin-compatible to ADS7816 and ADS7822
Applications
- Battery-operated systems
- Remote data acquisition
- Isolated data acquisition
- Simultaneous sampling, multi-channel systems
- Industrial controls
- Robotics
- Vibration analysis
Q & A
- What is the resolution of the ADS8321E/2K5G4?
The ADS8321E/2K5G4 has a 16-bit resolution. - What is the maximum sampling rate of the ADS8321E/2K5G4?
The maximum sampling rate is 100kHz. - How much power does the ADS8321E/2K5G4 consume at 100kHz?
The power consumption at 100kHz is less than 5.5mW. - What is the power-down current of the ADS8321E/2K5G4?
The power-down current is a maximum of 3µA. - What type of interface does the ADS8321E/2K5G4 use?
The device uses a synchronous serial (SPI/SSI compatible) interface. - What is the range of the external reference voltage for the ADS8321E/2K5G4?
The external reference voltage can be set to any level within the range of 500mV to VCC/2. - In what package is the ADS8321E/2K5G4 available?
The device is available in an MSOP-8 package. - Is the ADS8321E/2K5G4 pin-compatible with other models?
Yes, it is pin-compatible with ADS7816 and ADS7822. - What are some typical applications of the ADS8321E/2K5G4?
Typical applications include battery-operated systems, remote data acquisition, isolated data acquisition, and simultaneous multi-channel systems. - How does the ADS8321E/2K5G4 handle analog input?
The device has a bipolar and fully differential analog input, which can be driven in either single-ended or differential configurations.
