Overview
The AD7789BRM is a low power, 24-bit Sigma-Delta Analog-to-Digital Converter (ADC) produced by Analog Devices Inc. This device is designed for low frequency measurement applications and is part of the AD7788/AD7789 family. It offers high resolution and low noise, making it suitable for a variety of precision measurement tasks.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 24-bit |
| Power Supply | 2.5 V to 5.25 V |
| Normal Power Consumption | 75 µA maximum |
| Power-down Power Consumption | 1 µA maximum |
| RMS Noise | 1.5 µV |
| Integral Nonlinearity | 3.5 ppm typical |
| Operating Temperature Range | −40°C to +105°C |
| Package Type | 10-Lead Mini Small Outline Package (MSOP) |
| Interface | 3-wire serial SPI-, QSPI™-, MICROWIRE-, and DSP-compatible |
Key Features
- High resolution: 24-bit for the AD7789, with an effective resolution of 21.5 bits in bipolar input range with a 2.5 V reference.
- Low noise: RMS noise of 1.5 µV.
- Low power consumption: 75 µA maximum in normal operation and 1 µA maximum in power-down mode.
- Simultaneous 50 Hz and 60 Hz rejection.
- Internal clock oscillator and VDD monitor channel.
- Schmitt trigger on SCLK for robust serial interface.
Applications
- Smart transmitters.
- Battery applications.
- Portable instrumentation.
- Sensor measurement.
- Temperature measurement.
- Pressure measurement.
- Weigh scales.
- 4 to 20 mA loops.
Q & A
- What is the resolution of the AD7789BRM?
The AD7789BRM has a 24-bit resolution, with an effective resolution of 21.5 bits in bipolar input range with a 2.5 V reference.
- What is the power supply range for the AD7789BRM?
The power supply range is from 2.5 V to 5.25 V.
- What is the normal power consumption of the AD7789BRM?
The normal power consumption is 75 µA maximum.
- What is the power-down power consumption of the AD7789BRM?
The power-down power consumption is 1 µA maximum.
- What is the RMS noise of the AD7789BRM?
The RMS noise is 1.5 µV.
- Does the AD7789BRM have simultaneous 50 Hz and 60 Hz rejection?
Yes, it does have simultaneous 50 Hz and 60 Hz rejection.
- What type of interface does the AD7789BRM use?
The AD7789BRM uses a 3-wire serial SPI-, QSPI™-, MICROWIRE-, and DSP-compatible interface.
- What is the operating temperature range of the AD7789BRM?
The operating temperature range is from −40°C to +105°C.
- In what package is the AD7789BRM available?
The AD7789BRM is available in a 10-Lead Mini Small Outline Package (MSOP).
- What are some common applications of the AD7789BRM?
Common applications include smart transmitters, battery applications, portable instrumentation, sensor measurement, temperature measurement, pressure measurement, weigh scales, and 4 to 20 mA loops.
