Overview
The AD7788BRM, produced by Analog Devices Inc., is a low power, 16-bit Sigma-Delta Analog-to-Digital Converter (ADC) designed for low frequency measurement applications. This device operates from a single power supply ranging from 2.5 V to 5.25 V and is known for its low noise and high precision. The AD7788BRM is part of the AD7788/AD7789 family, with the AD7788 being the 16-bit version and the AD7789 being the 24-bit version. The device features an internal clock oscillator, eliminating the need for an external clock source, and offers simultaneous 50 Hz and 60 Hz rejection. It is available in a 10-lead Mini Small Outline Package (MSOP).
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 16 bits |
| Power Supply | 2.5 V to 5.25 V |
| Power Consumption (Normal) | 75 µA maximum |
| Power Consumption (Power-down) | 1 µA maximum |
| RMS Noise | 1.5 µV |
| Integral Nonlinearity | 3.5 ppm typical |
| Output Data Rate | 16.6 Hz |
| Interface | 3-wire serial SPI-, QSPI™-, MICROWIRE-, and DSP-compatible |
| Package | 10-lead MSOP |
| Operating Temperature | −40°C to +105°C |
Key Features
- Low power consumption with 75 µA maximum in normal operation and 1 µA in power-down mode.
- High resolution of 16 bits with a peak-to-peak resolution of 16 bits.
- Low noise performance with an RMS noise of 1.5 µV.
- Simultaneous 50 Hz and 60 Hz rejection.
- Internal clock oscillator, eliminating the need for an external clock source.
- VDD monitor channel for power supply monitoring.
- 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP.
- Schmitt trigger on SCLK for improved noise immunity.
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 AD7788BRM?
The AD7788BRM has a resolution of 16 bits.
- What is the power supply range for the AD7788BRM?
The power supply range is from 2.5 V to 5.25 V.
- What is the maximum power consumption in normal operation?
The maximum power consumption in normal operation is 75 µA.
- Does the AD7788BRM require an external clock source?
No, the AD7788BRM has an internal clock oscillator and does not require an external clock source.
- What is the output data rate of the AD7788BRM?
The output data rate is 16.6 Hz.
- What types of interfaces does the AD7788BRM support?
The AD7788BRM supports 3-wire serial interfaces compatible with SPI, QSPI, MICROWIRE, and DSP.
- What is the operating temperature range of the AD7788BRM?
The operating temperature range is from −40°C to +105°C.
- What are some common applications of the AD7788BRM?
Common applications include smart transmitters, battery applications, portable instrumentation, sensor measurement, temperature measurement, pressure measurement, weigh scales, and 4 to 20 mA loops.
- What is the package type of the AD7788BRM?
The AD7788BRM is available in a 10-lead MSOP package.
- What is the RMS noise of the AD7788BRM?
The RMS noise is 1.5 µV.
