Analog Devices Inc. AD7793BRUZ
| Parameters | |
|---|---|
| Series | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 16-TSSOP (0.173", 4.40mm Width) |
| Mfr | Analog Devices Inc. |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 105°C |
| Input Type | Differential |
| Configuration | MUX-ADC |
| Supplier Device Package | 16-TSSOP |
| Number of Inputs | 3 |
| Number of Bits | 24 |
| Number of A/D Converters | 1 |
| Architecture | Sigma-Delta |
| Reference Type | External, Internal |
| Data Interface | SPI, DSP |
| Sampling Rate (Per Second) | 470 |
| Voltage - Supply, Analog | 2.7V ~ 5.25V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V |
| Ratio - S/H:ADC | - |
| Features | PGA |
| Package | Tube |
| Product Status | Active |
| Base Product Number | AD7793 |
| REACH Status | REACH Unaffected |
| Standard Package | 96 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
AD7793BRUZ: High-Precision, Low-Power 24-Bit Σ-Δ ADC for Industrial Sensing
The AD7793BRUZ is a high-precision, low-power 24-bit Σ-Δ analog-to-digital converter (ADC) designed for industrial and instrumentation applications requiring high resolution and noise immunity. Housed in a 16-lead TSSOP package, it operates with a single 2.7 V to 5.25 V supply and consumes just 400 µA of current (typical), making it ideal for battery-powered or energy-efficient systems. The device features three differential analog inputs, an integrated low-noise programmable gain instrumentation amplifier (PGA), and an on-chip precision reference with ±10 µV initial accuracy. Its Σ-Δ architecture enables excellent linearity (±15 ppm INL) and supports data rates from 4.17 Hz to 470 Hz, configurable via SPI interface.
AD7793BRUZ Low-Power Precision ADC Key Features
● 24-Bit Resolution with Low Noise: Achieves up to 23-bit effective resolution with 40 nV RMS noise at 4.17 Hz update rate (gain = 64).
● Flexible Input Configuration: Three differential channels with PGA gains up to 128, allowing direct connection to low-level sensors like thermocouples, RTDs, and bridge transducers.
● Integrated Precision Components: Includes a 2.5 V internal reference (4 ppm/°C drift) and a bias voltage generator for offset adjustment.
● Low-Power Modes: Consumes only 1 µA in power-down mode, extending battery life in portable devices.
● Robust Clocking Options: Supports internal or external clocks, with 50/60 Hz rejection for noise-immune operation.
● Industrial-Grade Temperature Range: Operates from -40°C to +105°C, ensuring reliability in harsh environments.
24-Bit Sigma-Delta ADC Applications
● Industrial Process Control: Precision measurement of pressure, temperature, and weight in PLCs and HMI systems.
● Medical Instrumentation: Blood analyzers, patient monitors, and portable diagnostic devices requiring microvolt-level sensitivity.
● Smart Sensors: IoT nodes for environmental monitoring (e.g., gas analysis, humidity sensing) and predictive maintenance.
● Portable Test Equipment: 6-digit DVMs, oscilloscopes, and data loggers benefiting from its high resolution and low power.
Advantages of Selection
● Simplified System Design: The on-chip PGA and reference eliminate the need for external amplification and voltage sources, reducing BOM cost and PCB footprint.
● High Accuracy and Stability: ±10 µV reference initial error and 4 ppm/°C drift ensure long-term measurement reliability.
● SPI Interface Flexibility: Compatible with 3-wire, QSPI, and MICROWIRE protocols, easing integration with microcontrollers like STM32, MSP430, and PIC.
● Industry-Proven Performance: Trusted in applications demanding traceable calibration and compliance with industrial standards (e.g., IEC 61010 for safety).
