ADS8699 Series
18-Bit, 100-kSPS, 1-Ch SAR ADC with programmable (±12/±10/±6/±5/±2.5V) input ranges on +5V supply
Manufacturer: Texas Instruments
Catalog
18-Bit, 100-kSPS, 1-Ch SAR ADC with programmable (±12/±10/±6/±5/±2.5V) input ranges on +5V supply
Key Features
• 18-bit ADC with integrated analog front-endHigh speed:ADS8691: 1 MSPSADS8695: 500 kSPSADS8699: 100 kSPSSoftware programmable input ranges:Bipolar ranges: ±12.288 V, ±10.24 V, ±6.144 V, ±5.12 V, and ±2.56 VUnipolar ranges: 0 V–12.288 V, 0 V–10.24 V, 0 V–6.144 V, and 0 V–5.12 V5-V analog supply: 1.65-V to 5-V I/O supplyConstant resistive input impedance ≥ 1 MΩInput overvoltage protection: up to ±20 VOn-chip, 4.096-V reference with low driftExcellent performance:DNL: ±0.6 LSB; INL: ±1.75 LSBSNR: 92.5 dB; THD: –110 dBALARM → high, low thresholdmultiSPI™ interface with daisy-chainExtended industrial temperature range: –40°C to +125°C18-bit ADC with integrated analog front-endHigh speed:ADS8691: 1 MSPSADS8695: 500 kSPSADS8699: 100 kSPSSoftware programmable input ranges:Bipolar ranges: ±12.288 V, ±10.24 V, ±6.144 V, ±5.12 V, and ±2.56 VUnipolar ranges: 0 V–12.288 V, 0 V–10.24 V, 0 V–6.144 V, and 0 V–5.12 V5-V analog supply: 1.65-V to 5-V I/O supplyConstant resistive input impedance ≥ 1 MΩInput overvoltage protection: up to ±20 VOn-chip, 4.096-V reference with low driftExcellent performance:DNL: ±0.6 LSB; INL: ±1.75 LSBSNR: 92.5 dB; THD: –110 dBALARM → high, low thresholdmultiSPI™ interface with daisy-chainExtended industrial temperature range: –40°C to +125°C
Description
AI
The ADS8691, ADS8695, and ADS8699 belong to a family of integrated data acquisition system based on a successive approximation (SAR) analog-to-digital converter (ADC). The devices feature a high-speed, high-precision SAR ADC, integrated analog front-end (AFE) input driver circuit, overvoltage protection circuit up to ±20 V, and an on-chip 4.096-V reference with extremely low temperature drift.
The devices operate on a single 5-V analog supply, but support true bipolar input ranges of ±12.288 V, ±6.144 V, ±10.24 V, ±5.12 V, and ±2.56 V, as well as unipolar input ranges of 0 V to 12.288 V, 0 V to 10.24 V, 0 V to 6.144 V, and 0 V to 5.12 V. The gain and offset errors are accurately trimmed within the specified values for each input range to ensure high dc precision. The input range selection is done by software programming of the device internal registers. The devices offer a high resistive input impedance (≥ 1 MΩ) irrespective of the selected input range.
The multiSPI digital interface is backward-compatible to the traditional SPI protocol. Additionally, configurable features simplify interface to a wide range of host controllers.
The ADS8691, ADS8695, and ADS8699 belong to a family of integrated data acquisition system based on a successive approximation (SAR) analog-to-digital converter (ADC). The devices feature a high-speed, high-precision SAR ADC, integrated analog front-end (AFE) input driver circuit, overvoltage protection circuit up to ±20 V, and an on-chip 4.096-V reference with extremely low temperature drift.
The devices operate on a single 5-V analog supply, but support true bipolar input ranges of ±12.288 V, ±6.144 V, ±10.24 V, ±5.12 V, and ±2.56 V, as well as unipolar input ranges of 0 V to 12.288 V, 0 V to 10.24 V, 0 V to 6.144 V, and 0 V to 5.12 V. The gain and offset errors are accurately trimmed within the specified values for each input range to ensure high dc precision. The input range selection is done by software programming of the device internal registers. The devices offer a high resistive input impedance (≥ 1 MΩ) irrespective of the selected input range.
The multiSPI digital interface is backward-compatible to the traditional SPI protocol. Additionally, configurable features simplify interface to a wide range of host controllers.
