ADX921AQFN32

The ADX920/1/2/3 devices are multichannel, simultaneously sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converters (ADCs) with built-in programmable gain amplifiers (PGA), internal reference, and oscillator. The ADX920/1/2/3 devices integrate all the features typically required for portable, low-power medical electrocardiogram (ECG), activity, and fitness applications. With high integration and superior performance, the ADX920/1/2/3 devices enable the creation of scalable medical instrument systems with significantly reduced size, power, and overall cost. Each channel of the ADX920/1/2/3 devices features a flexible input multiplexer that can be independently connected to internally generated signals for testing, temperature, and lead-off detection. Additionally, any input channel configuration can be designated 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 implemented within the device using the internal excitation current sink or source. The ADX922/3 devices include fully integrated respiration impedance measurement functionality. The specified operating temperature range is from –40°C to 85°C.