Overview
The Texas Instruments ADS8689IPWR is a 16-bit, 100-kSPS, single-channel Successive Approximation Register (SAR) analog-to-digital converter (ADC) designed for high-speed and high-precision data acquisition. This device is part of the ADS868x family, which includes the ADS8681 and ADS8685, each with different sampling rates. The ADS8689 operates on a single 5-V analog supply and supports a wide range of programmable input ranges, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 16-bit | |
| Sampling Rate | 100 kSPS | |
| Analog Supply Voltage | 4.75 to 5.25 V | V |
| Digital Supply Voltage | 1.65 to 3.3 V | V |
| Input Ranges (Bipolar) | ±12.288 V, ±10.24 V, ±6.144 V, ±5.12 V, ±2.56 V | V |
| Input Ranges (Unipolar) | 0 V to 12.288 V, 0 V to 10.24 V, 0 V to 6.144 V, 0 V to 5.12 V | V |
| Input Impedance | ≥ 1 MΩ | Ω |
| Input Overvoltage Protection | Up to ±20 V | V |
| On-chip Reference Voltage | 4.096 V | V |
| DNL | ±0.4 LSB | |
| INL | ±0.5 LSB | |
| SNR | 92 dB | dB |
| THD | –107 dB | dB |
| Operating Temperature Range | –40°C to +125°C | °C |
| Package Type | TSSOP-16 |
Key Features
- High-Speed SAR ADC: The ADS8689 offers a sampling rate of 100 kSPS, making it suitable for applications requiring fast data acquisition.
- Programmable Input Ranges: Supports both bipolar and unipolar input ranges, which can be software-programmed to accommodate various signal types.
- Integrated Analog Front-End (AFE): Includes an integrated AFE input driver circuit and overvoltage protection up to ±20 V.
- On-Chip Reference: Features a 4.096-V reference with low temperature drift.
- High Resistive Input Impedance: ≥ 1 MΩ, ensuring minimal loading on the input signal.
- MultiSPI Digital Interface: Backward-compatible with traditional SPI protocol and supports daisy-chain configuration.
- Extended Industrial Temperature Range: Operates from –40°C to +125°C, making it suitable for harsh environments.
Applications
- Analog Input Modules: Ideal for integrating into analog input modules for data acquisition systems.
- Semiconductor Test: Used in testing and characterization of semiconductor devices.
- Servo Drive Control Modules: Suitable for precision control in servo drive systems.
- Industrial Automation: Can be used in various industrial automation applications requiring precise and fast analog-to-digital conversion.
Q & A
- What is the resolution of the ADS8689 ADC?
The ADS8689 has a resolution of 16 bits. - What are the supported input ranges for the ADS8689?
The device supports both bipolar (±12.288 V, ±10.24 V, ±6.144 V, ±5.12 V, ±2.56 V) and unipolar (0 V to 12.288 V, 0 V to 10.24 V, 0 V to 6.144 V, 0 V to 5.12 V) input ranges. - What is the sampling rate of the ADS8689?
The ADS8689 has a sampling rate of 100 kSPS. - What is the operating temperature range of the ADS8689?
The device operates from –40°C to +125°C. - Does the ADS8689 have input overvoltage protection?
Yes, it has input overvoltage protection up to ±20 V. - What type of digital interface does the ADS8689 use?
The ADS8689 uses a multiSPI digital interface, which is backward-compatible with traditional SPI protocol. - What is the on-chip reference voltage of the ADS8689?
The on-chip reference voltage is 4.096 V. - What is the input impedance of the ADS8689?
The input impedance is ≥ 1 MΩ. - Is the ADS8689 suitable for industrial applications?
Yes, it is suitable for industrial applications due to its extended industrial temperature range and robust features. - What package types are available for the ADS8689?
The ADS8689 is available in a TSSOP-16 package.
