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ADS1299 Datasheet(PDF) 1 Page - Texas Instruments |
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ADS1299 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 66 page  Control Oscillator SPI TestSignalsand Monitors PATIENTBIASANDREFERENCE Reference REF ADC7 ADC8 ADC1 ADC2 ADC3 ADC4 ADC5 ADC6 A7 A8 A1 A2 A3 A4 A5 A6 MUX ¼ ¼ ToChannel ADS1299 www.ti.com SBAS499A – JULY 2012 – REVISED AUGUST 2012 Low-Noise, 8-Channel, 24-Bit Analog Front-End for Biopotential Measurements Check for Samples: ADS1299 With its high levels of integration and exceptional 1 FEATURES performance, the ADS1299 enables the creation of 23 • Eight Low-Noise PGAs and Eight High- scalable medical instrumentation systems at Resolution Simultaneous-Sampling ADCs significantly reduced size, power, and overall cost. • Very Low Input-Referred Noise: The ADS1299 has a flexible input multiplexer per 1.0 μVPP (70-Hz BW) channel that can be independently connected to the • Low Power: 5 mW/channel internally-generated signals for test, temperature, and lead-off detection. Additionally, any configuration of • Input Bias Current: 300 pA input channels can be selected for derivation of the • Data Rate: 250 SPS to 16 kSPS patient bias output signal. The ADS1299 operates at • CMRR: –110 dB data rates from 250 SPS to 16 kSPS. Lead-off detection can be implemented internal to the device, • Programmable Gain: 1, 2, 4, 6, 8, 12, or 24 either with an external pull-up or pull-down resistor or • Unipolar or Bipolar Supplies: an excitation current sink or source. – Analog: 4.75 V to 5.25 V Multiple ADS1299 devices can be cascaded in high – Digital: 1.8 V to 3.6 V channel count systems in a daisy-chain configuration. • Built-In Bias Drive Amplifier, The ADS1299 is offered in a TQFP-64 package Lead-Off Detection, Test Signals specified from –40°C to +85°C. • Built-In Oscillator • Internal or External Reference • Flexible Power-Down, Standby Mode • Pin-Compatible with the ADS1298IPAG • SPI™-Compatible Serial Interface • Operating Temperature Range: –40°C to +85°C APPLICATIONS • Medical Instrumentation (EEG and ECG) Including: – EEG, Bispectral index (BIS), Evoked audio potential (EAP), Sleep study monitor • High-Precision, Simultaneous, Multichannel Signal Acquisition DESCRIPTION The ADS1299 is a low-noise, multichannel, simultaneous-sampling, 24-bit, delta-sigma ( ΔΣ) analog-to-digital converter (ADC) with a built-in programmable gain amplifier (PGA), internal reference, and an onboard oscillator. The ADS1299 incorporates all commonly-required features for electroencephalogram (EEG) applications. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 SPI is a trademark of Motorola. 3 All other trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2012, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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