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