Overview
The AD7982BRMZRL7 is an 18-bit, successive approximation, analog-to-digital converter (ADC) produced by Analog Devices Inc. This ADC operates from a single power supply, VDD, and features a low power, high speed, 18-bit sampling ADC along with a versatile serial interface port. The device samples the voltage difference between the IN+ and IN− pins on the rising edge of the CNV signal, with the reference voltage (VREF) applied externally and independent of the supply voltage. The AD7982 is available in 10-lead MSOP and 10-lead LFCSP packages and operates over a wide temperature range from −40°C to +85°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 18 bits | |
| Sampling Rate | 1 MSPS | |
| Power Supply (VDD) | 2.375 to 2.625 | V |
| Input Voltage Range | 0 to VREF | V |
| Reference Voltage (VREF) | Externally applied | |
| Interface | SPI-/QSPI-/MICROWIRE-/DSP-compatible | |
| Logic Compatibility | 1.8 V, 2.5 V, 3 V, 5 V | |
| Package | 10-lead MSOP, 10-lead LFCSP | |
| Operating Temperature Range | −40°C to +85°C | °C |
| Power Dissipation (1 MSPS throughput) | 7 to 8.6 mW | mW |
| Energy per Conversion | 7.0 nJ/sample | nJ/sample |
Key Features
- Low power and high speed operation, with power scaling linearly with throughput.
- Successive approximation architecture for precise analog-to-digital conversion.
- Versatile serial interface compatible with SPI, QSPI, MICROWIRE, and DSP, allowing daisy-chaining of multiple ADCs on a single 3-wire bus.
- Optional busy indicator for status monitoring.
- Separate VIO supply for logic compatibility with 1.8 V, 2.5 V, 3 V, and 5 V systems.
- High accuracy with no missing codes, low differential and integral linearity errors, and minimal gain and zero errors.
- Wide operating temperature range from −40°C to +85°C.
Applications
- Automated test equipment
- Data acquisition systems
- Medical instruments
- Machine automation
Q & A
- What is the resolution of the AD7982 ADC?
The AD7982 has an 18-bit resolution.
- What is the maximum sampling rate of the AD7982?
The AD7982 can sample at up to 1 MSPS.
- What are the power supply requirements for the AD7982?
The AD7982 operates from a single power supply, VDD, which can range from 2.375 V to 2.625 V.
- How does the AD7982 interface with other devices?
The AD7982 features a SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface, allowing it to daisy-chain multiple ADCs on a single 3-wire bus.
- What is the operating temperature range of the AD7982?
The AD7982 operates over a temperature range from −40°C to +85°C.
- What are the typical applications of the AD7982?
The AD7982 is commonly used in automated test equipment, data acquisition systems, medical instruments, and machine automation.
- How much power does the AD7982 consume at 1 MSPS throughput?
The power dissipation at 1 MSPS throughput is approximately 7 to 8.6 mW.
- What is the energy per conversion for the AD7982?
The energy per conversion is 7.0 nJ/sample.
- Is the AD7982 compatible with different logic levels?
Yes, the AD7982 is compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic levels using a separate VIO supply.
- What kind of evaluation kit is available for the AD7982?
The EVAL-AD7982SDZ is a fully featured evaluation kit available for the AD7982, which can operate in standalone mode or with the System Development Platform.
