AD7799 Datasheet | Analog Devices

04856-001 Data Sheet 3-Channel, Low Noise, Low Power, 16-/24-Bit, Σ-Δ ADC with On-Chip In-Amp AD7798/AD7799 Features RMS noise: 27 n V at 4.17 Hz (AD7799) 65 n V at 16.7 Hz (AD7799) 40 n V at 4.17 Hz (AD7798) 85 n V at 16.7 Hz (AD7798) Current: 380 µA typical Power-down: 1 µA maximum Low noise, programmable gain, instrumentation amp Update rate: 4.17 Hz to 470 Hz 3 differential inputs Internal clock oscillator Simultaneous 50 Hz/60 Hz rejection Reference detect Low-side power switch Programmable digital outputs Burnout currents Power supply: 2.7 V to 5.25 V - 40°C to +105°C temperature range Independent interface power supply 16-lead TSSOP package INTERFACE 3-wire serial SPI®, QSPI™, MICROWIRE™, and DSP patible Schmitt trigger on SCLK 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 FUNCTIONAL BLOCK DIAGRAM GND AVDD REFIN(+) REFIN(- ) AD7798/AD7799 REFERENCE DETECT AIN1(+) AIN1(- ) AIN2(+) AIN2(- ) AIN3(+)/P1 AIN3(- )/P2 AVDD IN-AMP Σ-Δ ADC GND GND INTERNAL CLOCK Figure 1. SERIAL INTERFACE AND CONTROL LOGIC AD7798: 16-BIT AD7799: 24-BIT DOUT/RDY DIN SCLK...