MCX W23: Ultra-Low Power Bluetooth® Low Energy Solution With Arm® Cortex® M33 TrustZone® for IoT
Compact List
Hosted Analog Front End for Potentiostat, Voltage and Thermistor Measurements, Extended with NFC Support and Battery Switch
- This page contains information on a preproduction product. Specifications and information herein are subject to change without notice. For additional information please contact your sales representative.
The NHS2634 is an analog front-end (AFE) chip for electrochemical sensors, optimized for low-capacity batteries or near-field communication (NFC) power. It supports amperometric, chronoamperometric, voltage and temperature measurements. Self-timed sensing notifies the host when new data is available. It integrates NFC with the ISO Data Exchange Protocol (ISO-DEP), operating at 1.5 V or 3 V and featuring a battery switch for longer shelf life. Enablement is available to non-disclosure agreement (NDA)-approved customers.
Features
Analog Front-End (AFE)
- Amperometric measurement via potentiostat supporting three-terminal and two-terminal modes
- Flexible configurability of four work electrodes
- Dual buffering modes: high‑accuracy, low‑bandwidth buffers or high‑speed, high‑bandwidth buffers
- Support for chronoamperometry, voltage measurements and external thermistor for temperature measurements
- Self-timed sensing operations interrupt the host process when new sensor data is available in an integrated RAM buffer
NFC Subsystem
- NFC Type 4 tag, ISO14443 / NFC Forum-compliant
- Support for device activation
- Flexible ISO-DEP Protocol interface to the host processor
Flexible Battery Configuration Options
- Low Voltage Supply Mode (LV_SM) configuration where a single silver-oxide coin cell powers the application, supporting a voltage range from 1.2 V to 1.95 V
- High Voltage Supply Mode (HV_SM) configuration where a dual silver-oxide or Li coin cell powers the application, supporting a voltage range from 1.8 V to 3.6 V
Package
- Wafer‑level chip‑scale package (WLCSP) 1.92 mm x 1.79 mm with 25 bumps
Low Current Consumption in LV_SM
- Shelf-mode current: 15 nA
- Bias voltage generation for one potentiostat channel using low‑bandwidth buffers is 2.5 μA
- Single work electrode (WE) electrode sensing-mode current is 5 μA during the measurement using LBW buffers, including the bias voltage generation
Related products