ADX922AQFN32

The ADX920/1/2/3 devices are multi-channel, simultaneous sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converters (ADCs) with integrated programmable gain amplifiers (PGAs), internal references, and on-board oscillators. These devices incorporate all the features typically required in portable, low-power medical electrocardiogram (ECG), exercise, and fitness applications. With their high level of integration and exceptional performance, the ADX920/1/2/3 devices enable the creation of scalable medical instrumentation systems with significantly reduced size, power consumption, and overall cost. Each channel of the ADX920/1/2/3 devices has a flexible input multiplexer that can independently connect to internally generated signals for testing, temperature, and lead-off detection. Furthermore, any input channel configuration can be utilized to derive the right leg drive (RLD) output signal. The ADX920/1/2/3 devices operate at data rates up to 8 kSPS. Lead-off detection can be achieved using the device's internal excitation current sink or source. The ADX922/3 devices include fully integrated respiration impedance measurement functionality. The operating temperature range is specified from –40°C to 85°C.