Key Sheet AD7792, AD7793 (Analog Devices) - 2

link to page 2
AD7792/AD7793 Key Sheet KEY CHARACTERISTICS FUNDAMENTAL SPECIFICATIONS Table 1. Parameter Min Typ Max Unit
ADC Type Σ-Δ ADC Number of Input Channels Three differential input channels Resolution AD7792 16 16 Bits AD7793 24 24 Bits Output Data Rate (ODR) 4.17 470 SPS Differential Input Voltage Range −VREF/gain +VREF/gain V Power Supply Voltage AVDD with Respect to GND 2.7 5.25 V DVDD with Respect to GND 2.7 5.25 V Power Supply Current (IDD) With External Reference (AVDD = 3 V, Buffer Off) 110 µA With Internal Reference (AVDD = 3 V, Gain = 4 to 128) 400 µA Offset Error ±1 µV Offset Error Drift vs. Temperature1 ±10 nV/°C Full-Scale Error ±10 µV Gain Drift vs. Temperature (Gain = 1 to 16, External ±1 ppm/°C Reference) Integral Nonlinearity (INL) −15 +15 ppm of FSR Power Supply Rejection 100 dB Operating Temperature Range −40 +105 °C 1 Recalibration at any temperature removes these errors.
NOISE Table 2. RMS Noise (nV) vs. Gain and Output Data Rate Using an External 2.5 V Reference RMS Noise (nV) Output Data Rate (SPS) G = 1 G = 2 G = 4 G = 8 G = 16 G = 32 G = 64 G = 128
4.17 0.64 0.6 0.29 0.22 0.1 0.065 0.039 0.041 8.33 1.04 0.96 0.38 0.26 0.13 0.078 0.057 0.055 16.7 1.55 1.45 0.54 0.36 0.18 0.11 0.087 0.086 33.2 2.3 2.13 0.74 0.5 0.23 0.17 0.124 0.118 62 2.95 2.85 0.92 0.58 0.29 0.2 0.153 0.144 123 4.89 4.74 1.49 1 0.48 0.32 0.265 0.283 242 11.76 9.5 4.02 1.96 0.88 0.45 0.379 0.397 470 11.33 9.44 3.07 1.79 0.99 0.63 0.568 0.593 Rev. 0 | Page 2 of 6 Document Outline General Description Features and Benefits Key Characteristics Fundamental Specifications Noise Operating the AD7792/AD7793 Data Interface Data Modes Continuous Conversion Mode (Default) Continuous Read Mode Single Conversion Mode Typical Application Diagram Frequently Asked Questions Learn More and Start Designing Compatible Devices Package Diagram Getting Started