ADX921QAQFN32

The ADX920/1/2/3Q devices are multi-channel, synchronous sampling, 24-bit, Δ-Σ (ΔΣ) analog-to-digital converters (ADCs) with a built-in programmable gain amplifier (PGA), internal reference, and oscillator. The ADX920/1/2/3Q devices integrate all the functionalities typically required for portable, low-power medical electrocardiogram (ECG), motion, and fitness applications. With their high level of integration and excellent performance, the ADX920/1/2/3Q devices enable the creation of scalable medical instrumentation systems with significantly reduced size, power consumption, and overall cost. Each channel of the ADX920/1/2/3Q devices features a flexible input multiplexer that can independently connect to internally generated signals for testing, temperature measurement, and lead-off detection. Additionally, any input channel configuration can be used to derive the right-leg drive (RLD) output signal. The ADX920/1/2/3Q devices operate at data rates of up to 16kSPS. Lead-off detection can be implemented internally using the device's internal excitation current sink or source. The ADX922/3Q devices include fully integrated respiration impedance measurement functionality. The specified operating temperature range is –40°C to 125°C.