Overview
The ADS8664IDBT is a 12-bit successive approximation (SAR) analog-to-digital converter (ADC) produced by Texas Instruments. This device is part of the ADS8664 and ADS8668 family, which are integrated data acquisition systems. The ADS8664IDBT features four input channels and operates at a throughput of 500 kSPS. It is designed to provide high precision and flexibility with integrated analog front-end circuitry, including overvoltage protection up to ±20 V and a 4-channel multiplexer with automatic and manual scanning modes. The device operates on a single 5-V analog supply and supports a wide range of bipolar and unipolar input ranges, making it suitable for various industrial and measurement applications.
Key Specifications
| Specification | Value | Unit |
|---|---|---|
| Number of Bits | 12 | |
| Number of Channels | 4 | |
| Sampling Rate | 500 kSPS | |
| Input Type | Single Ended | |
| Data Interface | SPI | |
| Analog Supply Voltage | 5 V | V |
| Digital Supply Voltage | 1.65 V to 5.25 V | V |
| Input Voltage 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 | V |
| Input Impedance | 1 MΩ | Ω |
| Operating Temperature Range | -40°C to 125°C | °C |
| Package Type | TSSOP-38 | |
| Package Dimensions | 9.7 mm × 4.4 mm | mm |
| DNL and INL | ±0.2 LSB | LSB |
| SNR and THD | 73.8 dB and -95 dB | dB |
| Power Consumption | 65 mW | mW |
Key Features
- 12-bit SAR ADC with integrated analog front-end circuitry for each input channel
- 4-channel multiplexer with automatic and manual scanning modes
- Channel-independent programmable inputs with various bipolar and unipolar ranges
- Constant resistive input impedance of 1 MΩ
- Input overvoltage protection up to ±20 V
- On-chip, 4.096-V reference with low temperature drift
- Excellent performance: 500-kSPS aggregate throughput, DNL: ±0.2 LSB, INL: ±0.2 LSB, SNR: 73.8 dB, THD: –95 dB
- Low power consumption: 65 mW
- AUX input for direct connection to ADC inputs
- ALARM output with high and low thresholds per channel
- SPI-compatible interface with daisy-chain support
- Industrial temperature range: –40°C to 125°C
Applications
The ADS8664IDBT is suitable for a variety of applications that require high-precision data acquisition, including:
- Industrial automation and control systems
- Medical devices and diagnostic equipment
- Test and measurement instruments
- Aerospace and defense systems
- Automotive systems, especially those requiring robust and precise data acquisition
Q & A
- What is the resolution of the ADS8664IDBT ADC?
The ADS8664IDBT has a 12-bit resolution.
- How many input channels does the ADS8664IDBT have?
The ADS8664IDBT has four input channels.
- What is the sampling rate of the ADS8664IDBT?
The sampling rate is 500 kSPS.
- What are the supported input voltage ranges for the ADS8664IDBT?
The device supports bipolar input ranges of ±10.24 V, ±5.12 V, ±2.56 V, ±1.28 V, and ±0.64 V, as well as unipolar 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 ADS8664IDBT?
The input impedance is 1 MΩ.
- Does the ADS8664IDBT have overvoltage protection?
Yes, it has input overvoltage protection up to ±20 V.
- What is the operating temperature range of the ADS8664IDBT?
The operating temperature range is –40°C to 125°C.
- What type of interface does the ADS8664IDBT use for data communication?
The device uses an SPI-compatible serial interface.
- Can multiple ADS8664IDBT devices be daisy-chained?
Yes, the devices support daisy-chaining.
- What is the power consumption of the ADS8664IDBT?
The power consumption is 65 mW.
