Overview
The AD7942BRMZ-RL7 from Analog Devices Inc. is a high-performance 14-bit analog-to-digital converter (ADC) that sets a new standard for versatility and performance in the ADC market. This device operates from a single power supply between 2.3 V and 5.5 V, making it suitable for a wide range of applications, including industrial process controls, medical instruments, and battery-powered devices. The ADC features a low power, high-speed sampling capability of 250,000 samples per second (250 kSPS) and includes an internal conversion clock and a low noise, wide bandwidth track-and-hold circuit. The SPI-compatible serial interface allows for easy integration and daisy-chaining of multiple ADCs, reducing system complexity and cost.
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Number of Bits | 14 | Number of Analog Inputs | 1 |
| Conversion Rate | 250 kSPS | Integral Nonlinearity (INL) | 1 LSB |
| Differential Nonlinearity | 0.7 LSB | Interface | SPI |
| Max Input Voltage | 5.5 V | Max Operating Temperature | 85 °C |
| Max Power Dissipation | 12.5 mW | Max Supply Voltage | 5.5 V |
| Min Input Voltage | 500 mV | Min Operating Temperature | -40 °C |
| Min Supply Voltage | 2.3 V | Number of Pins | 10 |
| Package/Case | MSOP-10 | RoHS Status | Compliant |
Key Features
- High-Speed Sampling: The AD7942BRMZ-RL7 can convert 250,000 samples per second, making it ideal for high-speed data acquisition applications.
- Low Power Consumption: The device powers down between conversions, consuming as low as 1.25 μW at 100 SPS with a 2.5 V power supply, which is beneficial for battery-powered devices.
- Low Noise Track-and-Hold Circuit: The ADC features a low noise, wide bandwidth track-and-hold circuit, ensuring high precision in analog input sampling.
- SPI-Compatible Serial Interface: The serial interface supports daisy-chaining of multiple ADCs on a single 3-wire bus and is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic levels.
- Internal Conversion Clock: The ADC includes an internal conversion clock, eliminating the need for an external clock for the conversion process.
- Compact Packaging: Available in a 10-lead MSOP or LFCSP package, making it space-efficient while allowing flexible configurations.
Applications
- Industrial Process Controls: Suitable for precision data acquisition in industrial environments due to its robust performance and wide operating temperature range.
- Medical Instruments: Ideal for sensitive medical applications requiring high precision and low noise.
- Battery-Powered Devices: The low power consumption makes it an excellent choice for battery-powered devices where energy efficiency is crucial.
- Multiplexed Channel Applications: The absence of pipeline delay or latency makes it suitable for multiple, multiplexed channel applications.
Q & A
- Q: What is the resolution of the AD7942BRMZ-RL7 ADC?
A: The AD7942BRMZ-RL7 is a 14-bit ADC. - Q: What is the conversion rate of the AD7942BRMZ-RL7?
A: The AD7942BRMZ-RL7 can convert up to 250,000 samples per second (250 kSPS). - Q: What is the operating voltage range of the AD7942BRMZ-RL7?
A: The device operates from a single power supply between 2.3 V and 5.5 V. - Q: What type of interface does the AD7942BRMZ-RL7 use?
A: The AD7942BRMZ-RL7 uses an SPI-compatible serial interface. - Q: Is the AD7942BRMZ-RL7 RoHS compliant?
A: Yes, the AD7942BRMZ-RL7 is RoHS compliant. - Q: What is the package type of the AD7942BRMZ-RL7?
A: The AD7942BRMZ-RL7 is available in a 10-lead MSOP package. - Q: What are the typical applications of the AD7942BRMZ-RL7?
A: Typical applications include industrial process controls, medical instruments, and battery-powered devices. - Q: How does the AD7942BRMZ-RL7 handle power consumption during idle periods?
A: The device powers down between conversions, significantly reducing power consumption. - Q: Is the AD7942BRMZ-RL7 compatible with different logic levels?
A: Yes, it is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic levels. - Q: What is the operating temperature range of the AD7942BRMZ-RL7?
A: The device operates from -40°C to +85°C. - Q: Does the AD7942BRMZ-RL7 have an internal conversion clock?
A: Yes, the AD7942BRMZ-RL7 includes an internal conversion clock.
