Overview
The AD7787BRMZ-RL is a low-power, 2-channel 24-bit Sigma-Delta Analog-to-Digital Converter (ADC) produced by Analog Devices Inc. This component is designed as a complete analog front end for low-frequency measurement applications. It features a low noise, high-resolution ADC with a range of functionalities that make it suitable for various precision measurement tasks.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| Number of Bits | 24 | ||
| Output Update Rate | 9.5 Hz min, 120 Hz max | Hz | |
| Resolution | 19.5 Bits p-p at 9.5 Hz update rate | ||
| Output Noise | 1.1 µV rms typ | µV | |
| Integral Nonlinearity | ±15 ppm of FSR max, 3.5 ppm typ | ppm | |
| Offset Error | ±3 µV typ | µV | |
| Offset Error Drift vs. Temperature | ±10 nV/°C typ | nV/°C | |
| Full-Scale Error | ±10 µV typ | µV | |
| Gain Drift vs. Temperature | ±0.5 ppm/°C typ | ppm/°C | |
| Power Supply Rejection | 90 dB min, 100 dB typ | dB | AIN = 1 V |
| Power Consumption | 75 µA max in normal operation, 1 µA max in power-down mode | µA | |
| Temperature Range | −40°C to +105°C | °C | |
| Package Type | 10-Lead Mini Small Outline Package (MSOP) |
Key Features
- Simultaneous 50 Hz and 60 Hz rejection
- Internal clock oscillator
- Rail-to-rail input buffer
- VDD monitor channel
- 3-wire serial SPI®, QSPI™, MICROWIRE™, and DSP compatible interface
- Schmitt trigger on SCLK
- Low power consumption with 75 µA max in normal operation and 1 µA max in power-down mode
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 AD7787BRMZ-RL ADC?
The AD7787BRMZ-RL has a resolution of 19.5 bits p-p at a 9.5 Hz update rate. - What is the output noise of the AD7787BRMZ-RL?
The output noise is 1.1 µV rms typical. - What is the temperature range of the AD7787BRMZ-RL?
The temperature range is −40°C to +105°C. - What is the power consumption of the AD7787BRMZ-RL?
The power consumption is 75 µA max in normal operation and 1 µA max in power-down mode. - What types of interfaces does the AD7787BRMZ-RL support?
The AD7787BRMZ-RL supports 3-wire serial SPI®, QSPI™, MICROWIRE™, and DSP compatible interfaces. - What are some of the key applications of the AD7787BRMZ-RL?
Key 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 AD7787BRMZ-RL?
The package type is a 10-Lead Mini Small Outline Package (MSOP). - Does the AD7787BRMZ-RL have internal clock oscillator capabilities?
Yes, the AD7787BRMZ-RL has an internal clock oscillator. - What is the integral nonlinearity of the AD7787BRMZ-RL?
The integral nonlinearity is ±15 ppm of FSR max, with a typical value of 3.5 ppm. - How does the AD7787BRMZ-RL handle power supply rejection?
The AD7787BRMZ-RL has a power supply rejection of 90 dB min, 100 dB typical at AIN = 1 V.
