FEATURES
► 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
► 1 low power, low noise potentiostat amplifier suitable for
potentiostat bias in electrochemical sensing
► 1 low noise, low power TIA, suitable for measuring sensor
current output
► 50 pA to 3 mA range
► Programmable load and gain resistors for sensor output
► Analog hardware accelerators
► Digital waveform generator
► Receive filters
► Complex impedance measurement (DFT) engine
► 1 high speed TIA to handle wide bandwidth input signals from
0.015 Hz up to 200 kHz
► Digital waveform generator for generation of sinusoid and
trapezoid waveforms
► 2.5 V and 1.82 V internal reference voltage sources
► System level power savings
► Fast power-up and power-down analog blocks for duty cycling
► Programmable AFE sequencer to minimize workload of host
controller
► 6 kB SRAM to preprogram AFE sequences
► Ultra low power potentiostat channel: 6.5 μA of current consumption
when powered on and all other blocks in hibernate
mode
► Smart sensor synchronization and data collection
► Cycle accurate control of sensor measurement
► Sequencer controlled GPIOs
► On-chip peripherals
► SPI serial input/output
► 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 amplifier
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
► Electrochemical measurements
► Electrochemical gas sensor measurements
► Potentiostat/amperometric/voltammetry/cyclic voltammetry
► Bioimpedance applications
► Skin impedance
► Body impedance
► Continuous glucose monitoring
► Battery impedance