Overview
The AD7940BRM, produced by Analog Devices Inc., is a high-performance, 14-bit successive approximation analog-to-digital converter (ADC). It is notable for being the first 14-bit ADC available in a compact 6-lead SOT-23 package, as well as an 8-lead MSOP package. This ADC is designed to offer high throughput rates with very low power consumption, making it an ideal choice for applications requiring precise and efficient analog-to-digital conversion.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 14 bits | |
| Throughput Rate | 100 kSPS (max) | |
| Supply Voltage | 2.50 V to 5.5 V | V |
| Power Consumption (Normal Mode, VDD = 5.5 V) | 4.8 mA (max), 3.3 mA (typ) | mA |
| Power Consumption (Normal Mode, VDD = 3.6 V) | 1.9 mA (max), 1.29 mA (typ) | mA |
| Power Consumption (Full Power-Down Mode, VDD = 5.5 V) | 0.5 µA (max) | µA |
| Power Consumption (Full Power-Down Mode, VDD = 3.6 V) | 0.3 µA (max) | µA |
| Analog Input Range | 0 V to VDD | V |
| Serial Clock Frequency | Up to 2.5 MHz | Hz |
| Package Type | 6-lead SOT-23, 8-lead MSOP |
Key Features
- High throughput rate of up to 100 kSPS with a 2.5 MHz clock.
- Low power consumption, with typical current draw of 3.3 mA at VDD = 5.5 V and 1.29 mA at VDD = 3.6 V.
- Compact packaging in 6-lead SOT-23 and 8-lead MSOP, offering significant space-saving advantages.
- Successive approximation ADC architecture with accurate control of the sampling instant via the CS input.
- On-chip track-and-hold ADC and serial interface.
- Wide analog input range from 0 V to VDD.
- Low power-down current of 0.5 µA (max) at VDD = 5.5 V and 0.3 µA (max) at VDD = 3.6 V.
Applications
The AD7940BRM is suitable for a variety of applications that require high-resolution analog-to-digital conversion with low power consumption. These include:
- Medical devices: For precise measurement and monitoring in medical equipment.
- Industrial automation: In control systems, data acquisition, and monitoring applications.
- Aerospace and defense: For systems requiring high reliability and low power consumption.
- Portable electronics: Where space and power efficiency are critical.
- Data acquisition systems: For high-speed and accurate data conversion.
Q & A
- What is the resolution of the AD7940BRM ADC?
The AD7940BRM has a resolution of 14 bits.
- What is the maximum throughput rate of the AD7940BRM?
The maximum throughput rate is 100 kSPS.
- What are the available package types for the AD7940BRM?
The AD7940BRM is available in 6-lead SOT-23 and 8-lead MSOP packages.
- What is the analog input range of the AD7940BRM?
The analog input range is from 0 V to VDD.
- How much power does the AD7940BRM consume in normal mode at VDD = 5.5 V?
The power consumption in normal mode at VDD = 5.5 V is typically 3.3 mA and up to 4.8 mA maximum.
- What is the power consumption in full power-down mode at VDD = 3.6 V?
The power consumption in full power-down mode at VDD = 3.6 V is up to 0.3 µA maximum.
- What is the maximum serial clock frequency for the AD7940BRM?
The maximum serial clock frequency is up to 2.5 MHz.
- Is the AD7940BRM suitable for medical device applications?
Yes, the AD7940BRM is suitable for medical device applications due to its high resolution and low power consumption.
- Can the AD7940BRM be used in industrial automation systems?
Yes, the AD7940BRM can be used in industrial automation systems for control and monitoring applications.
- What are the typical applications of the AD7940BRM?
The AD7940BRM is typically used in medical devices, industrial automation, aerospace and defense, portable electronics, and data acquisition systems.
