ADX921AQFN32

AnalogySemi
ADX920/ADX921/ADX922/ADX923 Low-Power, 2-Channel, 24-Bit Analog Front-End for Biopotential Measurements 1. FEATURES 2. APPLICATIONS • Three low-noise (ADX923) PGAs and two highresolution ADCs (ADX922/3) • • Input-referred noise: 8.6μVPP (G = 6) • Input bias current: 100pA • Data rate: 125SPS to 8kSPS Medical instrumentation (ECG) including: Patient monitoring: Holter, event, stress,...
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ADX920/ADX921/ADX922/ADX923 Low-Power, 2-Channel, 24-Bit Analog Front-End for Biopotential Measurements 1. FEATURES 2. APPLICATIONS • Three low-noise (ADX923) PGAs and two highresolution ADCs (ADX922/3) • • Input-referred noise: 8.6μVPP (G = 6) • Input bias current: 100pA • Data rate: 125SPS to 8kSPS Medical instrumentation (ECG) including: Patient monitoring: Holter, event, stress, and vital signs including ECG, AED, and telemedicine Personal care and fitness monitors (heart rate, respiration, and ECG) • CMRR: 117dB; THD: –107dB • • Programmable gain: 1, 2, 3, 4, 6, 8, or 12 High-precision, simultaneous, multichannel data acquisition • Supplies: unipolar or bipolar Analog: 2.7V to 5.5V Digital: 1.65V to 3.6V • Built-in right leg drive amplifier, lead-off detection, test signals • Integrated respiration impedance measurement (ADX922/3) • Electrode Rotation mode (ERM) to implement time-division multiplexing LEAD-I, LEAD-II, and LEAD-III measurements (ADX923) • Integrated digital AC lead-off measurement and software AC lead-off measurement (ADX922/3) • Integrated analog PACE measurement (ADX921/2/3) • Flexible power mode High Resolution mode High Speed mode (ADX921/2/3) • Built-in oscillator and reference • Supply monitor, internal temp sensor, OSC fault detection, overrange detection • Flexible power-down, standby mode • SPI™-compatible serial interface, timeout reset • Cyclic redundancy check (CRC) on communications, checksum • Support ADC data FIFO for reducing polling time of the external device to save power • Functional safety • Support systems meeting IEC 60601-2-47 • Operating temperature range: –40°C to 85°C © 2022 AnalogySemi Ltd. All Rights Reserved. 3. DESCRIPTION The ADX920/1/2/3 devices are multichannel, simultaneous sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converters (ADCs) with a built-in programmable gain amplifier (PGA), internal reference, and an onboard oscillator. The ADX920/1/2/3 devices incorporate all features commonly required in portable, lowpower medical electrocardiogram (ECG), sports, and fitness applications. With high levels of integration and exceptional performance, the ADX920/1/2/3 devices enable the creation of scalable medical instrumentation systems at significantly reduced size, power, and overall cost. The ADX920/1/2/3 devices have a flexible input multiplexer per channel that can be independently connected to the internallygenerated signals for test, temperature, and leadoff detection. Additionally, any configuration of input channels can be selected for derivation of the right leg drive (RLD) output signal. The ADX920/1/2/3 devices operate at data rates up to 8kSPS. Lead-off detection can be implemented internal to the device, using the device internal excitation current sink or source. The ADX922/3 devices include a fully integrated respiration impedance measurement function. Operating temperature is specified from –40°C to 85°C. See Table 1 for the order information. Public www.analogysemi.com | Page 1 of 106 PDF
Документация на ADX920AQFN32 

Дата модификации: 02.01.1970

Размер: 1.51 Мб

106 стр.

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