AD5941

概览

• 优势和特点

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• 产品详情

Analog input

• 16-bit, 800 kSPS ADC

• 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 to sensor: ±607 mV

• Programmable gain amplifier on 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

• 7 mm × 7 mm, 48-lead LFCSP

• Fully specified for operating temperature range of −40°C to +85°C