Packaging information
| Package | Pins TSSOP (DBT) | 38 |
| Operating temperature range (°C) -55 to 125 |
| Package qty | Carrier 50 | TUBE |
Features for the ADS8688AT
- 16-Bit ADC With Integrated Analog Front-End
- 8-Channel MUX With Auto and Manual Scan
- Channel-Independent Programmable Inputs:
- ±10.24 V, ±5.12 V, ±2.56 V, ±1.28 V, ±0.64 V
- 10.24 V, 5.12 V, 2.56 V, 1.28 V
- 5-V Analog Supply: 1.65-V to 5-V I/O Supply
- Constant Resistive Input Impedance: 1 MΩ
- Input Overvoltage Protection: Up to ±20 V
- Integrated 4.096-V Reference With 6 ppm/°C Drift
- Excellent Performance:
- 500-kSPS Aggregate Throughput
- DNL: ±0.5 LSB; INL: ±0.75 LSB
- 1-ppm/°C Drift for Gain Error and Offset
- SNR: 92 dB; THD: –102 dB
- Low Power: 65 mW
- AUX Input → Direct Connection to ADC Inputs
- ALARM → High and Low Thresholds per Channel
- SPI™-Compatible Interface With Daisy-Chain
- Temperature Range: –55°C to +125°C
- TSSOP-38 Package (9.7 mm × 4.4 mm)
Description for the ADS8688AT
The ADS8688AT is an 8-channel, integrated data acquisition system based on a 16-bit successive approximation (SAR) analog-to-digital converter (ADC), operating at a throughput of up to 500 kSPS. The device features integrated analog front-end circuitry for each input channel with up to ±20-V overvoltage protection, an 8-channel multiplexer with automatic and manual scanning modes, and an integrated 4.096-V reference with low temperature drift.
Operating on a single 5-V analog supply, each input channel can support multiple true bipolar as well as unipolar input ranges. Each input range is software-programmable and independent for each channel, enabling maximum system flexibility. The analog front-end gain is accurately trimmed to ensure high dc precision for all input ranges. The device offers a 1-MΩ constant resistive input impedance for any selected input range, enabling direct sensor connection to the device.
The ADS8688AT offers a simple SPI-compatible serial interface to the digital host and also supports daisy-chaining of multiple devices. The digital supply operates from 1.65 V to 5.25 V, enabling direct interface to a wide range of host controllers.