AD7785 Datasheet 20-Bit ADC

Manufacturer: Analog Devices

Overview: 3-Channel, Low Noise, Low Power, 20-Bit ∑-Δ ADC with On-Chip In-Amp and Reference.

Datasheet Details

The AD7785 is a low power, low noise, complete analog front end for high precision measurement applications.

The AD7785 contains a low noise 20-bit ∑-Δ ADC with three differential analog inputs.

The on-chip, low noise instrumentation amplifier means that signals of small amplitude can be interfaced directly to the ADC.

Up to 20 bits effective resolution RMS noise 40 nV @ 4.17 Hz 85 nV @ 16.7 Hz Current: 400 μA typical Power-down: 1 μA maximum Low noise programmable gain instrumentation amp Band gap reference with 4 ppm/°C drift typical Update rate: 4.17 Hz to 470 Hz 3 differential inputs Internal clock oscillator Simultaneous 50 Hz/60 Hz rejection Programmable current sources On-chip bias voltage generator Burnout currents Power supply: 2.7 V to 5.25 V.
40°C to +105°C temperature range Independent inte.

Part Number	Description
AD7780	Ultralow Power Sigma-Delta ADC
AD7781	Low Power Sigma-Delta ADC
AD7782	Read Only/ Pin Configured 24-Bit ADC
AD7783	Pin Configured 24-Bit ADC
AD7787	2-Channel 24-Bit Sigma-Delta ADC
AD7788	Sigma-Delta ADCs
AD7789	Sigma-Delta ADCs
AD7701	16-Bit A/D Converter
AD7703	20-Bit A/D Converter
AD7705	Sigma-Delta ADCs