Overview
The ADS8689IPW, produced by Texas Instruments, is a 16-bit, 100-kSPS, single-channel Successive Approximation Register (SAR) analog-to-digital converter (ADC) with an integrated analog front-end. This device is part of the ADS868x family, which includes the ADS8681 and ADS8685, each offering different sampling rates. The ADS8689IPW is designed for high-speed and high-precision data acquisition, making it suitable for a variety of industrial and commercial applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16 bits |
| Sampling Rate | 100 kSPS |
| Input Ranges (Bipolar) | ±12.288 V, ±10.24 V, ±6.144 V, ±5.12 V, ±2.56 V |
| Input Ranges (Unipolar) | 0 V–12.288 V, 0 V–10.24 V, 0 V–6.144 V, 0 V–5.12 V |
| Analog Supply Voltage | 5 V (1.65 V to 5 V I/O supply) |
| Input Impedance | ≥ 1 MΩ |
| Input Overvoltage Protection | Up to ±20 V |
| On-chip Reference Voltage | 4.096 V with low drift |
| Differential Non-Linearity (DNL) | ±0.4 LSB |
| Integral Non-Linearity (INL) | ±0.5 LSB |
| Signal-to-Noise Ratio (SNR) | 92 dB |
| Total Harmonic Distortion (THD) | –107 dB |
| Operating Temperature Range | –40°C to +125°C |
| Digital Interface | multiSPI™, backward-compatible to traditional SPI protocol |
Key Features
- High-speed, high-precision SAR ADC with integrated analog front-end (AFE) input driver circuit.
- Software programmable input ranges for both bipolar and unipolar inputs.
- Constant resistive input impedance of ≥ 1 MΩ.
- Input overvoltage protection up to ±20 V.
- On-chip 4.096-V reference with extremely low temperature drift.
- Excellent performance metrics including DNL: ±0.4 LSB, INL: ±0.5 LSB, SNR: 92 dB, and THD: –107 dB.
- ALARM feature with high and low threshold settings.
- multiSPI™ digital interface with daisy-chain capability, backward-compatible to traditional SPI protocol.
- Extended industrial temperature range of –40°C to +125°C.
Applications
- Analog input modules.
- Semiconductor test equipment.
- Servo drive control modules.
- Industrial automation and control systems.
- Medical devices requiring high-precision data acquisition.
- Aerospace and defense applications where high reliability and precision are critical.
Q & A
- What is the resolution and sampling rate of the ADS8689IPW? The ADS8689IPW has a 16-bit resolution and a sampling rate of 100 kSPS.
- What are the programmable input ranges for the ADS8689IPW? The device supports bipolar input ranges of ±12.288 V, ±10.24 V, ±6.144 V, ±5.12 V, and ±2.56 V, as well as unipolar ranges of 0 V to 12.288 V, 0 V to 10.24 V, 0 V to 6.144 V, and 0 V to 5.12 V.
- What is the analog supply voltage for the ADS8689IPW? The device operates on a single 5-V analog supply with an I/O supply range of 1.65 V to 5 V.
- Does the ADS8689IPW have input overvoltage protection? Yes, the device has input overvoltage protection up to ±20 V.
- What is the on-chip reference voltage and its characteristics? The on-chip reference voltage is 4.096 V with extremely low temperature drift.
- What are the key performance metrics of the ADS8689IPW? The device features DNL: ±0.4 LSB, INL: ±0.5 LSB, SNR: 92 dB, and THD: –107 dB.
- What digital interface does the ADS8689IPW use? The device uses a multiSPI™ interface, which is backward-compatible to the traditional SPI protocol.
- What is the operating temperature range of the ADS8689IPW? The operating temperature range is –40°C to +125°C.
- Can the ADS8689IPW be used in daisy-chain configurations? Yes, the multiSPI™ interface supports daisy-chain configurations.
- What are some typical applications of the ADS8689IPW? Typical applications include analog input modules, semiconductor test equipment, servo drive control modules, and industrial automation systems.
