Overview
The ADS8688AIDBT is a sophisticated 16-bit, 500-kSPS (kilo-samples per second), 8-channel successive approximation register (SAR) analog-to-digital converter (ADC) produced by Texas Instruments. This component operates with bipolar inputs on a 5-V supply and is enclosed in a 38-terminal thin shrink small-outline package (TSSOP). It is designed to perform in a wide operating temperature range from -40°C to 125°C, making it an ideal choice for a diverse range of data acquisition applications requiring accurate and rapid analog to digital conversion.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16-bit |
| Number of Channels | 8 |
| Sample Rate | 500 kSPS |
| Analog Supply Voltage | 5 V |
| I/O Supply Voltage | 1.65 V to 5 V |
| Input Ranges | ±10.24 V, ±5.12 V, ±2.56 V, ±1.28 V, ±0.64 V; 0 V to 10.24 V, 0 V to 5.12 V, 0 V to 2.56 V, 0 V to 1.28 V |
| Input Impedance | 1 MΩ |
| Overvoltage Protection | Up to ±20 V |
| On-Chip Reference Voltage | 4.096 V with low drift |
| Linearity Error | DNL: ±0.5 LSB; INL: ±0.75 LSB |
| SNR and THD | SNR: 92 dB; THD: –102 dB |
| Power Consumption | 65 mW |
| Operating Temperature Range | -40°C to 125°C |
| Package Type | TSSOP-38 |
Key Features
- 16-Bit ADCs with Integrated Analog Front-End: Features 4-, 8-channel MUX with auto and manual scan, channel-independent programmable inputs.
- Programmable Input Ranges: Supports bipolar input ranges of ±10.24 V, ±5.12 V, ±2.56 V, ±1.28 V, ±0.64 V, and unipolar input ranges of 0 V to 10.24 V, 0 V to 5.12 V, 0 V to 2.56 V, and 0 V to 1.28 V.
- Constant Resistive Input Impedance: 1 MΩ input impedance irrespective of the selected input range.[
- Input Overvoltage Protection: Up to ±20 V.[
- On-Chip, 4.096-V Reference with Low Drift: Ensures excellent stability and accuracy.[
- Excellent Performance: 500-kSPS aggregate throughput, DNL: ±0.5 LSB; INL: ±0.75 LSB, SNR: 92 dB; THD: –102 dB.[
- Low Power Consumption: Operates at 65 mW.[
- AUX Input and ALARM Output: AUX input for direct connection to ADC inputs and ALARM output with high and low thresholds per channel.[
- SPI-Compatible Interface: Supports daisy-chaining of multiple devices and operates with a digital supply from 1.65 V to 5 V.[
Applications
- Industrial Automation: Suitable for process control, data acquisition, and instrumentation.[
- Automotive: Used in engine control units, transmission control modules, and body electronics.[
- Energy Management Systems: Ideal for smart grids, renewable energy systems, and building automation.[
- Instrumentation: Used in data acquisition, test and measurement equipment, and medical devices.[
- Robotics: Suitable for autonomous vehicles, robotic arms, and sensor-based systems.[
- Education and Research: Used in sophisticated laboratory equipment for precise measurements and experiments.[
- Internet of Things (IoT): Functions as a core component in IoT devices for environmental monitoring or smart agriculture systems.[
- Telecommunications: Used in equipment handling analog signal processing or channel monitoring.[
Q & A
- What is the resolution and sample rate of the ADS8688AIDBT?
The ADS8688AIDBT is a 16-bit ADC with a sample rate of 500 kSPS.
- What are the input voltage ranges supported by the ADS8688AIDBT?
The device supports bipolar input ranges of ±10.24 V, ±5.12 V, ±2.56 V, ±1.28 V, ±0.64 V, and unipolar input ranges of 0 V to 10.24 V, 0 V to 5.12 V, 0 V to 2.56 V, and 0 V to 1.28 V.
- What is the input impedance of the ADS8688AIDBT?
The input impedance is 1 MΩ irrespective of the selected input range.[
- Does the ADS8688AIDBT have overvoltage protection?
Yes, it has overvoltage protection up to ±20 V.[
- What is the on-chip reference voltage of the ADS8688AIDBT?
The on-chip reference voltage is 4.096 V with low drift.[
- What is the power consumption of the ADS8688AIDBT?
The device operates at 65 mW.[
- What interface does the ADS8688AIDBT use for communication?
The device uses a SPI-compatible interface and supports daisy-chaining of multiple devices.[
- What are the typical applications of the ADS8688AIDBT?
It is used in industrial automation, automotive, energy management systems, instrumentation, robotics, education and research, IoT devices, and telecommunications.[
- What is the operating temperature range of the ADS8688AIDBT?
The operating temperature range is -40°C to 125°C.[
- What package type does the ADS8688AIDBT come in?
The device comes in a TSSOP-38 package.[
