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ADS8698IDBT Datasheet(PDF) 1 Page - Texas Instruments |
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ADS8698IDBT Datasheet(HTML) 1 Page - Texas Instruments |
1 / 77 page Oscillator CS SCLK SDI SDO DAISY REFSEL RST / PD REFCAP REFIO PGA 1 M: OVP 1 M: 2nd-Order LPF ADC Driver VB0 AIN_0P AIN_0GND OVP PGA 1 M: OVP 1 M: 2nd-Order LPF ADC Driver VB1 AIN_1P AIN_1GND OVP PGA 1 M: OVP 1 M: 2nd-Order LPF ADC Driver VB2 AIN_2P AIN_2GND OVP PGA 1 M: OVP 1 M: 2nd-Order LPF ADC Driver VB3 AIN_3P AIN_3GND OVP PGA 1 M: OVP 1 M: 2nd-Order LPF ADC Driver VB4 AIN_4P AIN_4GND OVP PGA 1 M: OVP 1 M: 2nd-Order LPF ADC Driver VB5 AIN_5P AIN_5GND OVP PGA 1 M: OVP 1 M: 2nd-Order LPF ADC Driver VB6 AIN_6P AIN_6GND OVP PGA 1 M: OVP 1 M: 2nd-Order LPF ADC Driver VB7 AIN_7P AIN_7GND OVP AUX_IN AUX_GND 18-Bit SAR ADC Digital Logic and Interface 4.096-V Reference REFGND DGND AGND DVDD AVDD ADS8698 ADS8694 ALARM Internal ADC Operating as 16-Bit ADC -0.05 -0.03 -0.01 0.01 0.03 0.05 ±40 ±7 26 59 92 125 Free-Air temperature (oC) C027 ----- ± 2.5*V REF ----- ] 1.25*VREF ----- ] 0.625*VREF ----- + 2.5*V REF -----+1.25*V REF Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design ADS8694, ADS8698 SBAS686 – JULY 2015 ADS869x 18-Bit, 500-kSPS, 4- and 8-Channel, Single-Supply, SAR ADCs with Bipolar Input Ranges 1 Features 2 Applications 1 • 18-Bit ADCs with Integrated Analog Front-End • Power Automation • 4-, 8-Channel MUX with Auto and Manual Scan • Protection Relays • Channel-Independent Programmable Inputs: • PLC Analog Input Modules – ±10.24 V, ±5.12 V, ±2.56 V 3 Description – 10.24 V, 5.12 V The ADS8694 and ADS8698 are 4- and 8-channel, • 5-V Analog Supply: 1.65-V to 5-V I/O Supply integrated data acquisition systems based on a 18-bit • Constant Resistive Input Impedance: 1 M Ω successive approximation (SAR) analog-to-digital converter (ADC), operating at a throughput of • Input Overvoltage Protection: Up to ±20 V 500 kSPS. The devices feature integrated analog • On-Chip, 4.096-V Reference with Low Drift front-end circuitry for each input channel with • Excellent Performance: overvoltage protection up to ±20 V, a 4- or 8-channel multiplexer with automatic and manual scanning – 500-kSPS Aggregate Throughput modes, and an on-chip, 4.096-V reference with low – DNL: ±0.5 LSB; INL: ±1.5 LSB temperature drift. Operating on a single 5-V analog – Low Drift for Gain Error and Offset supply, each input channel on the devices can – SNR: 93.5 dB; THD: –105 dB support true bipolar input ranges of ±10.24 V, ±5.12 V, and ±2.56 V, as well as unipolar input – Low Power: 65 mW ranges of 0 V to 10.24 V and 0 V to 5.12 V. The gain • AUX Input → Direct Connection to ADC Inputs of the analog front-end for all input ranges is • ALARM → High and Low Thresholds per Channel accurately trimmed to ensure a high dc precision. The input range selection is software-programmable and • SPI™-Compatible Interface with Daisy-Chain independent for each channel. The devices offer a • Industrial Temperature Range: –40°C to 125°C 1-M Ω constant resistive input impedance irrespective • TSSOP-38 Package (9.7 mm × 4.4 mm) of the selected input range. The ADS8694 and ADS8698 offer a simple SPI- Block Diagram 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. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) ADS869x TSSOP (38) 9.70 mm × 4.40 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. Gain Error versus Temperature 1 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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