Overview
The ADS8688IDBT is a 16-bit, 500-kSPS, 8-channel, single-supply successive approximation (SAR) analog-to-digital converter (ADC) produced by Texas Instruments. This integrated data acquisition system features an on-chip analog front-end for each input channel, providing high precision and versatility. The device operates on a single 5-V analog supply and supports a wide range of input voltages, including bipolar and unipolar configurations. It is housed in a TSSOP-38 package, making it suitable for various industrial and automotive applications.
Key Specifications
| Attribute | Value |
|---|---|
| Resolution | 16 bits |
| Number of Channels | 8 |
| Sample Rate | 500 kSPS |
| Input Ranges | Bipolar: ±10.24 V, ±5.12 V, ±2.56 V; Unipolar: 0 V to 10.24 V, 0 V to 5.12 V |
| Analog Supply Voltage | 5 V |
| Digital Supply Voltage | 1.65 V to 5.25 V |
| Input Impedance | 1 MΩ |
| Input Overvoltage Protection | Up to ±20 V |
| Reference Voltage | On-chip, 4.096 V with low drift |
| Power Consumption | 65 mW |
| Operating Temperature Range | –40°C to 125°C |
| Package Type | TSSOP-38 |
| Package Size | 9.7 mm × 4.4 mm |
Key Features
- 16-bit ADC with integrated analog front-end
- 4- or 8-channel multiplexer with auto and manual scan modes
- Channel-independent programmable input 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: ±0.5 LSB, INL: ±0.75 LSB, SNR: 92 dB, THD: –102 dB
- Low power consumption: 65 mW
- AUX input for direct connection to ADC inputs
- SPI™-compatible interface with daisy-chain capability
Applications
- Power automation
- Protection relays
- PLC analog input modules
- Industrial and automotive data acquisition systems
Q & A
- What is the resolution of the ADS8688IDBT ADC?
The ADS8688IDBT has a resolution of 16 bits. - How many input channels does the ADS8688IDBT have?
The ADS8688IDBT has 8 input channels. - What is the sample rate of the ADS8688IDBT?
The sample rate of the ADS8688IDBT is 500 kSPS. - What are the supported input voltage ranges for the ADS8688IDBT?
The device supports bipolar input ranges of ±10.24 V, ±5.12 V, and ±2.56 V, as well as unipolar input ranges of 0 V to 10.24 V and 0 V to 5.12 V. - What is the analog supply voltage for the ADS8688IDBT?
The analog supply voltage is 5 V. - What is the digital supply voltage range for the ADS8688IDBT?
The digital supply voltage range is from 1.65 V to 5.25 V. - What is the input impedance of the ADS8688IDBT?
The input impedance is 1 MΩ. - Does the ADS8688IDBT have input overvoltage protection?
Yes, it has input overvoltage protection up to ±20 V. - What is the on-chip reference voltage of the ADS8688IDBT?
The on-chip reference voltage is 4.096 V with low temperature drift. - What is the power consumption of the ADS8688IDBT?
The power consumption is 65 mW.
