Overview
The AD7780BRUZ, produced by Analog Devices Inc., is a 24-bit, pin-programmable, ultralow power Sigma-Delta Analog-to-Digital Converter (ADC). This device is designed for measuring wide dynamic range, low frequency signals and is particularly suited for portable or battery-operated products due to its low power consumption of 330 μA. The AD7780 includes a precision 24-bit Σ-Δ modulator, an on-chip, low noise programmable gain amplifier (PGA), and an on-chip oscillator. It offers a complete front-end solution for bridge sensor applications such as weigh scales and pressure sensors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24-bit | |
| Power Consumption | 330 μA | μA |
| Update Rates | 10 Hz, 16.7 Hz | Hz |
| Gain Settings | 1, 128 | |
| Full-Scale Differential Input | ±5 V, ±39 mV | V, mV |
| Power Supply Range | 2.7 V to 5.25 V | V |
| Operating Temperature Range | –40°C to +105°C | °C |
| Package Type | 16-Lead TSSOP | |
| RMS Noise (at 10 Hz update rate) | 49 nV | nV |
| RMS Noise (at 16.7 Hz update rate) | 69 nV | nV |
Key Features
- Low power consumption of 330 μA, suitable for battery-operated devices.
- On-chip, low noise programmable gain amplifier (PGA) with gain settings of 1 or 128.
- On-chip oscillator and digital filter.
- Two update rates: 10 Hz and 16.7 Hz.
- Simultaneous 50 Hz/60 Hz rejection at both update rates.
- Power-down mode to increase battery life.
- 2-wire interface for simplified data retrieval.
- Eight status bits appended to the 24-bit conversion for data validity confirmation.
Applications
- Bridge sensor applications such as weigh scales and pressure sensors.
- Strain gage and load cell applications.
- Portable or battery-operated products requiring low power consumption.
Q & A
- What is the resolution of the AD7780BRUZ ADC?
The AD7780BRUZ has a 24-bit resolution.
- What are the available update rates for the AD7780BRUZ?
The AD7780BRUZ offers update rates of 10 Hz and 16.7 Hz.
- What are the gain settings available on the AD7780BRUZ?
The gain settings available are 1 and 128.
- What is the power consumption of the AD7780BRUZ?
The AD7780BRUZ consumes 330 μA of power.
- What is the operating temperature range of the AD7780BRUZ?
The operating temperature range is –40°C to +105°C.
- What type of package is the AD7780BRUZ available in?
The AD7780BRUZ is available in a 16-Lead TSSOP package.
- Does the AD7780BRUZ have a power-down mode?
- What is the purpose of the eight status bits appended to the 24-bit conversion?
The eight status bits are used to confirm the validity of the serial transfer.
- What types of sensors can the AD7780BRUZ be used with?
The AD7780BRUZ can be used with bridge sensors, strain gages, and load cells.
- What is the full-scale differential input range of the AD7780BRUZ?
The full-scale differential input range is ±5 V or ±39 mV.
