Overview
The ADS8684IDBTR, produced by Texas Instruments, is a 16-bit successive approximation (SAR) analog-to-digital converter (ADC) integrated into a 4-channel data acquisition system. This device operates at a throughput of 500 kSPS and is designed for high-precision data acquisition applications. It features an integrated analog front-end circuitry for each input channel, including overvoltage protection up to ±20 V and a 4-channel multiplexer with automatic and manual scanning modes. The ADS8684IDBTR is powered by a single 5-V analog supply and supports a wide range of input voltage ranges, making it versatile for various industrial and automotive applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16-bit |
| Throughput | 500 kSPS |
| Number of Channels | 4 |
| Input Ranges (Bipolar) | ±10.24 V, ±5.12 V, ±2.56 V |
| Input Ranges (Unipolar) | 0 V to 10.24 V, 0 V to 5.12 V |
| Analog Supply Voltage | 5 V |
| Digital Supply Voltage | 1.65 V to 5.25 V |
| Input Impedance | 1 MΩ |
| Overvoltage Protection | Up to ±20 V |
| On-Chip Reference Voltage | 4.096 V with low drift |
| DNL | ±0.5 LSB |
| INL | ±0.75 LSB |
| SNR | 92 dB |
| THD | –102 dB |
| Power Consumption | 65 mW |
| Operating Temperature Range | –40°C to 125°C |
| Package Type | TSSOP-38 |
| Package Dimensions | 9.7 mm × 4.4 mm |
Key Features
- 16-Bit ADC with Integrated Analog Front-End: High precision and integrated circuitry for each input channel.
- 4-Channel Multiplexer: Automatic and manual scanning modes.
- Programmable Input Ranges: Bipolar (±10.24 V, ±5.12 V, ±2.56 V) and unipolar (0 V to 10.24 V, 0 V to 5.12 V) ranges.
- Constant Resistive Input Impedance: 1 MΩ regardless of the selected input range.
- Input Overvoltage Protection: Up to ±20 V.
- On-Chip Reference Voltage: 4.096 V with low drift.
- Excellent Performance Metrics: DNL: ±0.5 LSB, INL: ±0.75 LSB, SNR: 92 dB, THD: –102 dB.
- Low Power Consumption: 65 mW.
- SPI-Compatible Interface: Supports daisy-chaining of multiple devices.
- Industrial Temperature Range: –40°C to 125°C.
Applications
- Industrial Automation: Data acquisition and control systems.
- Medical Devices: High-precision measurement and monitoring.
- Aerospace and Defense: Reliable data acquisition in harsh environments.
- Automotive Systems: Advanced driver-assistance systems (ADAS) and vehicle control systems.
- Smart Grid and Energy Management: High-accuracy measurement for smart grid applications, such as the TIDA-00310 reference design for Smart Grid IEDs.
Q & A
- What is the resolution of the ADS8684IDBTR ADC?
The ADS8684IDBTR has a 16-bit resolution.
- What is the throughput of the ADS8684IDBTR?
The throughput is 500 kSPS.
- How many channels does the ADS8684IDBTR support?
The device supports 4 channels.
- What are the input voltage ranges for the ADS8684IDBTR?
The input ranges include bipolar (±10.24 V, ±5.12 V, ±2.56 V) and unipolar (0 V to 10.24 V, 0 V to 5.12 V) ranges.
- What is the input impedance of the ADS8684IDBTR?
The input impedance is 1 MΩ.
- Does the ADS8684IDBTR have overvoltage protection?
Yes, it has overvoltage protection up to ±20 V.
- What is the operating temperature range of the ADS8684IDBTR?
The operating temperature range is –40°C to 125°C.
- What type of interface does the ADS8684IDBTR use?
The device uses an SPI-compatible interface with daisy-chaining support.
- How much power does the ADS8684IDBTR consume?
The power consumption is 65 mW.
- What package type is the ADS8684IDBTR available in?
The device is available in a TSSOP-38 package.
