ADX920Q/ADX921Q/ADX922Q/ADX923Q Low-Power, 2-Channel, 24-Bit Analog Front-End for Biopotential Measurements
●The ADX92xQ 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 ADX92xQ devices incorporate all features commonly required in portable, low-power medical electrocardiogram (ECG), sports, and fitness applications.
●With high levels of integration and exceptional performance, the ADX92xQ devices enable the creation of scalable medical instrumentation systems at significantly reduced size, power, and overall cost.
●The ADX92xQ devices have a flexible input multiplexer per channel that can be independently connected to the internally-generated signals for test, temperature, and lead-off detection. Additionally, any configuration of input channels can be selected for derivation of the right leg drive (RLD) output signal. The ADX92xQ 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 ADX922Q and ADX923Q versions include a fully integrated respiration impedance measurement function. Operating temperature is specified from –40°C to 125°C.
■FEATURES:
●Three low-noise (ADX923Q) PGAs and two high-resolution ADCs (ADX922Q and ADX923Q)
●Input-referred noise: 8.8μVPP (150Hz BW, G = 6)
●Input bias current: 100pA (max)
●Data rate: 125SPS to 16kSPS
●CMRR: 117dB; THD: 109dB
●Programmable gain: 1, 2, 3, 4, 6, 8, or 12
●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 (ADX922Q and ADX923Q)
●Electrode Rotation mode (ERM) to implement time-division multiplexing LEAD-I, LEAD-II, and LEAD-III measurements (ADX923Q)
●Integrated analog PACE measurement (ADX921Q, ADX922Q, ADX923Q)
●Flexible power mode
◆High Resolution mode
◆High Speed mode (ADX921Q, ADX922Q, ADX923Q)
●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 features to support automotive application
●Supports systems meeting IEC 60601-2-47
●Operating temperature range: –40°C to 125°C
●AEC-Q100
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Low-Power, 2-Channel, 24-Bit Analog Front-End 、 multichannel, simultaneous sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converters 、 ADCs |
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[ Medical instrumentation ][ ECG ][ Patient monitoring ][ AED ][ telemedicine ][ Personal care ][ fitness monitors ][ Holter ] |
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Datasheet |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2023 |
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125 KB |
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