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ADS8699 Dataheets PDF



Part Number ADS8699
Manufacturers Texas Instruments
Logo Texas Instruments
Description SAR ADC
Datasheet ADS8699 DatasheetADS8699 Datasheet (PDF)

www.ti.com ADS8691, ADS8695, ADS8699 SBAS777B – DECAEMDBSE8R629011,6A– DRESV8IS6E9D5,MAARDCSH82609291 SBAS777B – DECEMBER 2016 – REVISED MARCH 2021 ADS869x 18-Bit, High-Speed, Single-Supply, SAR ADC Data Acquisition System With Programmable, Bipolar Input Ranges 1 Features • 18-bit ADC with integrated analog front-end • High speed: – ADS8691: 1 MSPS – ADS8695: 500 kSPS – ADS8699: 100 kSPS • Software programmable input ranges: – Bipolar ranges: ±12.288 V, ±10.24 V, ±6.144 V, ±5.12 V, and ±2.5.

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www.ti.com ADS8691, ADS8695, ADS8699 SBAS777B – DECAEMDBSE8R629011,6A– DRESV8IS6E9D5,MAARDCSH82609291 SBAS777B – DECEMBER 2016 – REVISED MARCH 2021 ADS869x 18-Bit, High-Speed, Single-Supply, SAR ADC Data Acquisition System With Programmable, Bipolar Input Ranges 1 Features • 18-bit ADC with integrated analog front-end • High speed: – ADS8691: 1 MSPS – ADS8695: 500 kSPS – ADS8699: 100 kSPS • Software programmable input ranges: – Bipolar ranges: ±12.288 V, ±10.24 V, ±6.144 V, ±5.12 V, and ±2.56 V – Unipolar ranges: 0 V–12.288 V, 0 V–10.24 V, 0 V–6.144 V, and 0 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: – DNL: ±0.6 LSB; INL: ±1.75 LSB – SNR: 92.5 dB; THD: –110 dB • ALARM → high, low threshold • multiSPI™ interface with daisy-chain • Extended industrial temperature range: –40°C to +125°C 2 Applications • Analog input modules • Data acquisition (DAQ) • Semiconductor tests • LCD tests 3 Description 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. Device Information (1) PART NUMBER PACKAGE BODY SIZE (NOM) ADS869x TSSOP (16) 5.00 mm × 4.40 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. AVDD ADS869x DVDD 4.096-V Reference REFIO REFCAP AIN_P AIN_GND 1 M: 1 M: OVP OVP PGA 2nd-Order LPF ADC Driver VBIAS Oscillator 18-Bit SAR ADC Digital Logic and Interface CONVST/CS SCLK SDI SDO AGND DGND Block Diagram REFGND CopyrighAtn©I2M0P21OTReTxaAsNInTsNtruOmTeInCtsEInactotrhpeoreatnedd of this data sheet addresses availability, warranty, changes, use iSnusbamfeittyD-corcituicmael anpt pFleiceadtbioancsk, 1 intellectual property matters and other important disclaimers. PRODUCTION DATA. Product Folder Links: ADS8691 ADS8695 ADS8699 ADS8691, ADS8695, ADS8699 SBAS777B – DECEMBER 2016 – REVISED MARCH 2021 www.ti.com Table of Contents 1 Features............................................................................1 2 Applications..................................................................... 1 3 Description.......................................................................1 4 Revision History.............................................................. 2 5 Pin Configuration and Functions...................................4 6 Specifications.................................................................. 5 6.1 Absolute Maximum Ratings........................................ 5 6.2 ESD Ratings............................................................... 5 6.3 Recommended Operating Conditions.........................5 6.4 Thermal Information....................................................5 6.5 Electrical Characteristics.............................................6 6.6 Timing Requirements: Conversion Cycle..................10 6.7 Timing Requirements: Asynchronous Reset.............10 6.8 Timing Requirements: SPI-Compatible Serial Interface...................................................................... 10 6.9 Timing Requirements: Source-Synchronous Serial Interface (External Clock)..................................11 6.10 Timing Requirements: Source-Synchronous Serial Interface (Internal Clock)................................... 11 6.11 Timing Diagrams..................................................... 12 6.12 Typical Characteristics............................................ 15 7 Detailed Description......................................................22 7.1 Overview................................................................... 22 7.2 Functional Block Diagram......................................... 22 7.3 Feature Description...................................................23.


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