Overview
The AD7940BRMZ is a 14-bit, fast, and low-power successive approximation analog-to-digital converter (ADC) produced by Analog Devices Inc. This component operates from a single power supply ranging from 2.50 V to 5.5 V and features throughput rates of up to 100 kSPS. It is housed in an 8-lead MSOP package, offering significant space-saving advantages. The AD7940BRMZ includes a low noise, wide bandwidth track-and-hold amplifier capable of handling input frequencies exceeding 7 MHz. The conversion process and data acquisition are controlled using the chip select (CS) and serial clock (SCLK) inputs, enabling seamless interface with microprocessors or digital signal processors (DSPs).
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices Inc. |
| Part Number | AD7940BRMZ |
| Package | 8-Lead MSOP |
| Number of Pins | 8 |
| Number of Bits | 14 |
| Sampling Rate | Up to 100 kSPS |
| Polarity | Unipolar |
| Interface | SPI |
| Integral Nonlinearity (INL) | 2 LSB |
| Minimum Supply Voltage | 2.5 V |
| Maximum Supply Voltage | 5.5 V |
| Operating Temperature Range | -40°C to +85°C |
| Analog Input Range | 0 V to VDD |
Key Features
- Low power consumption with typical current of 1.9 mA at 3.6 V and 100 kSPS sampling rate.
- High throughput rate of up to 100 kSPS with a 2.5 MHz clock.
- Internal reference taken from VDD, allowing the widest dynamic input range from 0 V to VDD.
- Low noise, wide bandwidth track-and-hold amplifier capable of handling input frequencies exceeding 7 MHz.
- Serial interface controlled by CS and SCLK inputs, enabling easy integration with microprocessors or DSPs.
- No pipelined delays associated with the conversion process.
- Full power-down mode with current as low as 0.3 µA at 3.6 V.
Applications
- Industrial automation and control systems where high precision and low power consumption are critical.
- Medical devices requiring accurate analog-to-digital conversion with minimal power usage.
- Portable and battery-powered devices where low power consumption is essential.
- Aerospace and defense applications needing reliable and high-performance ADCs.
- Automotive systems requiring robust and precise analog-to-digital conversion).
Q & A
- What is the resolution of the AD7940BRMZ ADC?
The AD7940BRMZ is a 14-bit ADC.
- What is the operating voltage range of the AD7940BRMZ?
The AD7940BRMZ operates from a single power supply ranging from 2.50 V to 5.5 V.
- What is the maximum sampling rate of the AD7940BRMZ?
The maximum sampling rate is up to 100 kSPS.
- What type of interface does the AD7940BRMZ use?
The AD7940BRMZ uses a serial peripheral interface (SPI).
- What is the analog input range of the AD7940BRMZ?
The analog input range is from 0 V to VDD.
- How is the conversion process controlled in the AD7940BRMZ?
The conversion process is controlled using the chip select (CS) and serial clock (SCLK) inputs.
- What is the power consumption of the AD7940BRMZ in full power-down mode?
In full power-down mode, the current is as low as 0.3 µA at 3.6 V.
- What type of amplifier does the AD7940BRMZ contain?
The AD7940BRMZ contains a low noise, wide bandwidth track-and-hold amplifier.
- What is the operating temperature range of the AD7940BRMZ?
The operating temperature range is -40°C to +85°C.
- What are some typical applications of the AD7940BRMZ?
Typical applications include industrial automation, medical devices, portable and battery-powered devices, aerospace, and automotive systems.
