The AD7799 are low power, low noise, complete analog front ends for high precision measurement applications. TheAD7799 contains a low noise, 24-bit Σ-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. With a gain setting of 64, the rms noise is 27 nV for the AD7799 and 40 nV

On-chip features include a low-side power switch, reference detect, programmable digital output pins, burnout currents, and an internal clock oscillator. The output data rate from the part is software-programmable and can be varied from 4.17 Hz to 470 Hz.

The part operates with a power supply from 2.7 V to 5.25 V. The  AD7799 consumes 380 μA typical. Both devices are housed in a 16-lead TSSOP package.

Features

Applications

• Weigh scales
• Pressure measurement
• Strain gauge transducers
• Gas analysis
• Industrial process control
• Instrumentation
• Portable instrumentation
• Blood analysis
• Smart transmitters
• Liquid/gas chromotography 6-digit DVM