Gehäuseinformationen
| Gehäuse | Pins TSSOP (DBT) | 38 |
| Betriebstemperaturbereich (°C) -40 to 125 |
| Gehäusemenge | Träger 50 | TUBE |
Merkmale von ADS8684
- 16-Bit ADC with Integrated Analog Front-End
- 4-, 8-Channel MUX with Auto and Manual Scan
- Channel-Independent Programmable Input Ranges:
- Bipolar: ±10.24 V, ±5.12 V, and ±2.56 V
- Unipolar: 10.24 V, 5.12 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
- On-Chip, 4.096-V Reference with Low Drift
- Excellent Performance:
- 500-kSPS Aggregate Throughput
- DNL: ±0.5 LSB; INL: ±0.75 LSB
- Low Drift for Gain Error and Offset
- SNR: 92 dB; THD: –102 dB
- Low Power: 65 mW
- AUX Input → Direct Connection to ADC Inputs
- SPI™-Compatible Interface with Daisy-Chain
- –40°C to 125°C Industrial Temperature Range
- TSSOP-38 Package (9.7 mm × 4.4 mm)
Beschreibung von ADS8684
The ADS8684 and ADS8688 are 4- and 8-channel, integrated data acquisition systems based on a 16-bit successive approximation (SAR) analog-to-digital converter (ADC), operating at a throughput of 500 kSPS. The devices feature integrated analog front-end circuitry for each input channel with overvoltage protection up to ±20 V, a 4- or 8-channel multiplexer with automatic and manual scanning modes, and an on-chip, 4.096-V reference with low temperature drift. Operating on a single 5-V analog supply, each input channel on the devices can support true 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. The gain of the analog front-end for all input ranges is accurately trimmed to ensure a high dc precision. The input range selection is software-programmable and independent for each channel. The devices offer a 1-MΩ constant resistive input impedance irrespective of the selected input range.
The ADS8684 and ADS8688 offer a simple SPI-compatible serial interface to the digital host and also support 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.