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ADS8699IPWR Datasheet(PDF) 1 Page - Texas Instruments |
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ADS8699IPWR Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 74 page  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. Oscillator CONVST/CS PGA 1 M: OVP 1 M: OVP 2 nd-Order LPF ADC Driver VBIAS AIN_P AIN_GND 4.096-V Reference REFGND DGND AGND DVDD AVDD Digital Logic and Interface REFIO REFCAP SCLK SDI SDO 18-Bit SAR ADC ADS869x Block Diagram www.ti.com ADS8691, ADS8695, ADS8699 SBAS777B – DECEMBER 2016 – REVISED MARCH 2021 Copyright © 2021 Texas Instruments Incorporated Submit Document Feedback 1 Product Folder Links: ADS8691 ADS8695 ADS8699 ADS8691, ADS8695, ADS8699 SBAS777B – DECEMBER 2016 – REVISED MARCH 2021 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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