AD5940

Data Sheet AD5940/AD5941 High Precision, Impedance, and Electrochemical Front End FEATURES ► SPI serial input/output ► Analog input ► 16-bit ADC with both 800 kSPS and 1.6 MSPS options ► Voltage, current, and impedance measurement capability ► Internal and external current and voltage channels ► Ultralow leakage switch matrix and input mux ► Input buffers and programmable gain amplifier ► Voltage DACs ► Dual output voltage DAC with an output range of 0.2 V to 2.4 V ► 12-bit VBIAS0 output to bias potentiostat ► 6-bit VZERO0 output to bias TIA ► Ultra low power: 1 µA ► 1 high speed, 12-bit DAC ► Output range from high-speed DAC (HSDAC): ±607 mV ► Programmable gain amplifier on HSDAC output with gain settings of 2 and 0.05 ► Amplifiers, accelerators, and references ► Wake-up timer ► Interrupt controller ► Power ► 2.8 V to 3.6 V supply ► 1.82 V input/output compliant ► Power-on reset ► Hibernate mode with low power DAC and potentiostat amplifi- er powered up to maintain sensor bias ► Package and temperature range ► AD5940: 3.6 mm × 4.2 mm, 56-ball WLCSP ► AD5941: 7 mm × 7 mm, 48-lead LFCSP ► AD5940 and AD5941 fully specified for operating temperature range of −40°C to +85°C ► AD5941W fully specified for operating temperature range of −40°C to +105°C ► AEC-Q100 qualified for automotive applications APPLICATIONS ► 1 low power, low noise potentiostat amplifier suitable for potentiostat bias in electrochemical sensing ► 1 low noise, low power TIA, suitable for measuring sensor c...