Overview
The AD7940BRMZ-REEL7, produced by Analog Devices Inc., is a 14-bit, fast, and low-power successive approximation analog-to-digital converter (ADC). This device is designed to operate from a single 2.50 V to 5.5 V power supply and features throughput rates of up to 100 kSPS. The AD7940 is notable for its low power dissipation and high throughput, making it suitable for a variety of applications where space and power efficiency are critical.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 14 bits |
| Throughput Rate | Up to 100 kSPS |
| Power Supply | 2.50 V to 5.5 V |
| Power Consumption (Normal Mode) | 4.8 mA max at VDD = 5.5 V, 1.9 mA max at VDD = 3.6 V |
| Power Consumption (Full Power-Down Mode) | 0.5 µA max at VDD = 5.5 V, 0.3 µA max at VDD = 3.6 V |
| Analog Input Range | 0 V to VDD |
| Package | 8-Lead MSOP |
| Operating Temperature Range | -40°C to +85°C |
Key Features
- Low power dissipation with high throughput rates.
- Successive approximation ADC with accurate control of the sampling instant via a CS input.
- No pipelined delays associated with the part.
- On-chip track-and-hold amplifier capable of handling input frequencies in excess of 7 MHz.
- Serial interface for data output, with data clocked out on the falling edge of the SCLK input.
- Compact packaging options including 6-lead SOT-23 and 8-lead MSOP, offering significant space-saving advantages.
Applications
The AD7940 is suitable for a wide range of applications where low power consumption and high throughput are essential. These include:
- Portable and battery-powered devices.
- Medical devices requiring precise and efficient data conversion.
- Industrial control systems where space and power efficiency are critical.
- Aerospace and defense applications needing reliable and compact ADC solutions.
Q & A
- What is the resolution of the AD7940 ADC?
The AD7940 has a resolution of 14 bits.
- What is the maximum throughput rate of the AD7940?
The maximum throughput rate is up to 100 kSPS.
- What is the power supply range for the AD7940?
The AD7940 operates from a single 2.50 V to 5.5 V power supply.
- How much power does the AD7940 consume in normal mode?
In normal mode, the power consumption is 4.8 mA max at VDD = 5.5 V and 1.9 mA max at VDD = 3.6 V.
- What is the analog input range for the AD7940?
The analog input range is from 0 V to VDD.
- What types of packages are available for the AD7940?
The AD7940 is available in 6-lead SOT-23 and 8-lead MSOP packages.
- What is the operating temperature range for the AD7940?
The operating temperature range is -40°C to +85°C.
- How does the AD7940 handle input frequencies?
The AD7940 contains a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 7 MHz.
- What is the power consumption in full power-down mode?
In full power-down mode, the power consumption is 0.5 µA max at VDD = 5.5 V and 0.3 µA max at VDD = 3.6 V.
- How is data output handled in the AD7940?
Data is output serially, clocked out on the falling edge of the SCLK input.
