AD5941BCPZ-RL7

Overview

The AD5941BCPZ-RL7 is a high precision, low power analog front end (AFE) designed for portable electrochemical and bioimpedance applications. It features a 16-bit SAR ADC with data rates up to 800 kSPS or 1.6 MSPS. The device includes two excitation loops: a low-power loop with a dual-output DAC and potentiostat for DC to 200 Hz signals, and a high-speed loop with a 12-bit DAC for frequencies up to 200 kHz. It integrates a programmable gain amplifier, input buffers, and a switch matrix. Operating on a 2.8 V to 3.6 V supply, it is housed in a 48-lead LFCSP package and specified for -40°C to +85°C.

Feature Summary

• 16-bit ADC with 800 kSPS or 1.6 MSPS sampling options
• Dual excitation loops: Low-power (DC-200 Hz) and High-speed (up to 200 kHz)
• Integrated potentiostat amplifier and transimpedance amplifiers (TIA)
• Programmable AFE sequencer with 6 kB SRAM for autonomous operation

Applications

• Electrochemical measurements
• Bioimpedance and body impedance analysis
• Continuous glucose monitoring
• Battery impedance testing

Procurement Notes

Verify the suffix RL7 indicates reel packaging when sourcing. Confirm the B grade meets specific linearity requirements if tighter tolerances than standard are needed. Ensure the host system supports the required SPI interface and voltage levels compatible with the 2.8 V to 3.6 V supply range.

Selection Notes

Select this model over the AD5940 if a 48-lead LFCSP package is preferred over the 56-ball WLCSP. Consider the AD5941W variant if operation above 85°C up to 105°C is required. Verify that the 1.82 V and 2.5 V internal references meet the precision needs without external components.

Part Context

This component belongs to the AD594x family, which also includes the AD5940. Both share identical functionality and code bases but differ in package type. The AD5941 is specifically packaged in a 7 mm × 7 mm, 48-lead LFCSP, making it suitable for different form factors compared to the WLCSP version.

Replacement Considerations

The AD5940 is functionally equivalent but uses a 56-ball WLCSP package. The AD5941W offers the same electrical performance as the AD5941 but is rated for an extended temperature range of -40°C to +105°C.