AD7705 Dual 16 bit ADC Module with Programmable Input Gain and SPI Interface TM7705


The AD7705 is analog-to-digital converters (ADC)
with on-chip digital filtering, intended for the measurement of
wide, dynamic range, low frequency signals, such as those in
industrial-control or process-control applications. Each contains
a (or charge-balancing) ADC, a calibration microcontroller
with on-chip static RAM, a clock oscillator, a digital filter, and a
bidirectional serial communication port.


If you have any questions on this product please feel free to contact us.

*Disclaimer: The images are merely illustrative.

AD7705: 2 fully differential input channel ADCs

  • 16 bits no missing codes
  • 0.003% nonlinearity

Programmable gain front end: gains from 1 to 128
3-wire serial interface

  • Schmitt-trigger input on SCLK

Ability to buffer the analog input
Power dissipation 1 mW maximum @ 3 V
Standby current 8 μA maximum
16-lead PDIP, 16-lead SOIC, and 16-lead TSSOP packages


  • 2.7 V to 3.3 V or 4.75 V to 5.25 V operation
  • MCU interface: SPI®-, QSPI™-, MICROWIRE™-, and DSP-compatible
  • the main ADC chip: AD7705 
  • an external reference voltage LM285-2.5 (imported genuine original)
  • the input circuit with a resistor divider and the RC filter,
  • enabling customers to change their own gain range
  • the chip with programmable gain amplifier, the gain range: 1-128 times


Data Sheet TM7705/AD7705
Arduino Library Github
Arduino Library Zip File Github


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