0
ACTIVE
Resolution (Bits) |
16 |
Sample rate (max) (ksps) |
500 |
Number of input channels |
8 |
Interface type |
SPI |
Architecture |
SAR |
Input type |
Single-ended |
Multichannel configuration |
Multiplexed |
Rating |
Catalog |
Reference mode |
External, Internal |
Input voltage range (max) (V) |
10.24 |
Input voltage range (min) (V) |
-10.24 |
Features |
Daisy-Chainable, Oscillator, Over-Voltage Protection, PGA |
Operating temperature range (°C) |
-55 to 125 |
Power consumption (typ) (mW) |
65 |
Analog supply voltage (min) (V) |
4.75 |
Analog supply voltage (max) (V) |
5.25 |
SNR (dB) |
92 |
Digital supply (min) (V) |
1.65 |
Digital supply (max) (V) |
5.25 |
TSSOP (DBT)-38-62.08 mm² 9.7 x 6.4
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.
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