Overview
The ADS8665IPWR is a 12-bit, high-speed, successive approximation register (SAR) analog-to-digital converter (ADC) produced by Texas Instruments. This device is part of the ADS866x family and is designed for high-precision data acquisition applications. It operates on a single 5-V analog supply and supports a wide range of programmable bipolar and unipolar input ranges. The ADS8665IPWR features an integrated analog front-end, overvoltage protection, and an on-chip 4.096-V reference with low drift, making it suitable for various industrial and mixed-signal applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12 Bits | |
| Sampling Rate | 500 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 | 4.75 V to 5.25 V | V |
| Digital Supply Voltage | 1.65 V to 3.3 V | V |
| Input Impedance | ≥ 1 MΩ | Ω |
| Overvoltage Protection | Up to ±20 V | V |
| Internal Reference Voltage | 4.096 V | V |
| DNL (Differential Nonlinearity) | ±0.1 LSB | |
| INL (Integral Nonlinearity) | ±0.15 LSB | |
| SNR (Signal-to-Noise Ratio) | 74 dB | dB |
| THD (Total Harmonic Distortion) | –102 dB | dB |
| Operating Temperature Range | –40°C to +125°C | °C |
Key Features
- High-speed SAR ADC with 500 kSPS sampling rate
- Software programmable bipolar and unipolar input ranges
- Integrated analog front-end with input driver circuit
- Overvoltage protection up to ±20 V
- On-chip 4.096-V reference with low temperature drift
- High resistive input impedance (≥ 1 MΩ)
- MultiSPI digital interface with daisy-chain capability
- Configurable alarm thresholds for high and low signals
- Extended industrial temperature range: –40°C to +125°C
Applications
- Analog input modules
- Mixed modules (AI, AO, DI, DO)
- Data acquisition (DAQ) systems
- Trackside signaling and control systems
Q & A
- What is the resolution of the ADS8665IPWR ADC?
The ADS8665IPWR has a resolution of 12 bits.
- What are the programmable input ranges of the ADS8665IPWR?
The device supports bipolar 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–12.288 V, 0 V–10.24 V, 0 V–6.144 V, and 0 V–5.12 V.
- What is the sampling rate of the ADS8665IPWR?
The sampling rate is 500 kSPS.
- What is the input impedance of the ADS8665IPWR?
The input impedance is ≥ 1 MΩ.
- Does the ADS8665IPWR have overvoltage protection?
- What is the internal reference voltage of the ADS8665IPWR?
The internal reference voltage is 4.096 V.
- What is the operating temperature range of the ADS8665IPWR?
The operating temperature range is –40°C to +125°C.
- Does the ADS8665IPWR support daisy-chain operation?
- What are some common applications of the ADS8665IPWR?
- What is the package type of the ADS8665IPWR?
