Overview
The ADS8688AIDBTR is a 16-bit, 500-kSPS, 8-channel 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 bipolar and unipolar input ranges. It is packaged in a TSSOP-38 package, suitable for various industrial and automotive applications due to its industrial temperature range of –40°C to 125°C.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16 bits |
| Number of Channels | 8 |
| Sample Rate | 500 kSPS |
| Analog Supply Voltage | 4.75 V to 5.25 V |
| Digital Supply Voltage | 1.65 V to 5.25 V |
| Input Range (Bipolar) | ±10.24 V, ±5.12 V, ±2.56 V, ±1.28 V, ±0.64 V |
| Input Range (Unipolar) | 0 V to 10.24 V, 0 V to 5.12 V, 0 V to 2.56 V, 0 V to 1.28 V |
| Input Overvoltage Protection | Up to ±20 V |
| Input Impedance | 1 MΩ |
| Reference Voltage | On-chip, 4.096 V with low drift |
| DNL | ±0.5 LSB |
| INL | ±0.75 LSB |
| SNR | 92 dB |
| THD | –102 dB |
| Power Consumption | 65 mW |
| Operating Temperature Range | –40°C to 125°C |
| Package Type | TSSOP-38 |
Key Features
- 16-bit ADCs with integrated analog front-end circuitry for each input channel
- 4- or 8-channel multiplexer with automatic and manual scanning modes
- Channel-independent programmable input ranges (bipolar and unipolar)
- 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
- ALARM feature with high and low thresholds per channel
- SPI™-compatible interface with daisy-chain capability
- Industrial temperature range: –40°C to 125°C
Applications
- Power automation
- Protection relays
- PLC analog input modules
- Industrial control systems
- Automotive systems requiring high precision and reliability
- Medical devices requiring accurate analog-to-digital conversion
Q & A
- What is the resolution of the ADS8688AIDBTR ADC?
The resolution of the ADS8688AIDBTR ADC is 16 bits.
- How many channels does the ADS8688AIDBTR support?
The ADS8688AIDBTR supports 8 channels.
- What is the maximum sample rate of the ADS8688AIDBTR?
The maximum sample rate of the ADS8688AIDBTR is 500 kSPS.
- What are the supported input ranges for the ADS8688AIDBTR?
The ADS8688AIDBTR 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 input 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 overvoltage protection of the ADS8688AIDBTR?
The ADS8688AIDBTR has input overvoltage protection up to ±20 V.
- What is the reference voltage of the ADS8688AIDBTR?
The ADS8688AIDBTR has an on-chip, 4.096-V reference with low temperature drift.
- What is the power consumption of the ADS8688AIDBTR?
The power consumption of the ADS8688AIDBTR is 65 mW.
- What interface does the ADS8688AIDBTR use?
The ADS8688AIDBTR uses a SPI™-compatible interface with daisy-chain capability.
- What is the operating temperature range of the ADS8688AIDBTR?
The operating temperature range of the ADS8688AIDBTR is –40°C to 125°C.
- What package type is the ADS8688AIDBTR available in?
The ADS8688AIDBTR is available in a TSSOP-38 package.
