ADX920 Datasheet Text
ADX920/ADX921/ADX922/ADX923
Low-Power, 2-Channel, 24-Bit Analog Front-End for Biopotential Measurements
1. Features
- 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
- CMRR: 117dB; THD:
- 107dB
- 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 (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™-patible serial interface, timeout reset
- Cyclic redundancy check (CRC) on munications, 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
2. APPLICATIONS
- 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)
- High-precision, simultaneous, multichannel data acquisition...