Overview
The AD7694BRMZ is a 16-bit, 250 kSPS PulSAR® analog-to-digital converter (ADC) produced by Analog Devices Inc. This device operates from a single power supply, VDD, between 2.7 V and 5.25 V, making it versatile for various applications. The AD7694 features a high-speed, low-power design with no missing codes (B grade), an internal conversion clock, and a SPI-compatible serial interface port. It is housed in an 8-lead MSOP package and is specified to operate from –40°C to +85°C.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Resolution | 16-bit | Number of bits in the digital output |
| Sampling Rate | 250 kSPS | Samples per second |
| Power Supply | 2.7 V to 5.25 V | Single supply voltage range |
| Supply Current | 540 μA at 2.7 V/100 kSPS, 800 μA at 5 V/100 kSPS | Current consumption at different supply voltages and sampling rates |
| Standby Current | 1 nA | Current consumption in standby mode |
| Package | 8-lead MSOP | Package type and lead count |
| Operating Temperature | –40°C to +85°C | Temperature range for operation |
| Interface | SPI-compatible serial interface | Type of serial interface |
Key Features
- Low Power Consumption: The AD7694 consumes low power, making it ideal for battery-powered applications. It powers down between conversions, reducing overall power usage.
- High-Speed Conversion: Capable of converting 250,000 samples per second, this ADC is suitable for high-speed applications.
- No Missing Codes: The device ensures no missing codes (B grade), providing accurate and reliable conversions.
- Internal Conversion Clock: The ADC includes an internal conversion clock, eliminating the need for an external clock for the conversion process.
- Low Noise and Wide Bandwidth Track-and-Hold Circuit: The device features a low noise, wide bandwidth track-and-hold circuit with a very short aperture delay, making it suitable for multiple, multiplexed channel applications.
- SPI-Compatible Serial Interface: The ADC has a SPI-compatible serial interface, ensuring compatibility with a variety of microcontrollers and digital signal processors.
Applications
- Battery-Powered Equipment: The low power consumption of the AD7694 makes it an excellent choice for battery-powered devices.
- Data Acquisition: Suitable for high-speed data acquisition systems due to its fast sampling rate and low power consumption.
- Instrumentation: Used in various instrumentation applications requiring high accuracy and speed.
- Medical Instruments: The AD7694 is used in medical devices where precision and reliability are critical.
- Process Control: Ideal for process control systems that require accurate and fast analog-to-digital conversions.
Q & A
- What is the resolution of the AD7694BRMZ ADC?
The AD7694BRMZ has a resolution of 16 bits.
- What is the maximum sampling rate of the AD7694BRMZ?
The maximum sampling rate is 250 kSPS.
- What is the power supply voltage range for the AD7694BRMZ?
The device operates from a single power supply between 2.7 V and 5.25 V.
- What is the typical supply current consumption of the AD7694BRMZ at 100 kSPS?
At 2.7 V, the supply current is 540 μA, and at 5 V, it is 800 μA.
- What type of package does the AD7694BRMZ come in?
The device is housed in an 8-lead MSOP package.
- What is the operating temperature range of the AD7694BRMZ?
The operating temperature range is from –40°C to +85°C.
- Does the AD7694BRMZ have an internal conversion clock?
Yes, the AD7694BRMZ includes an internal conversion clock.
- What type of serial interface does the AD7694BRMZ use?
The device uses a SPI-compatible serial interface.
- Is the AD7694BRMZ suitable for battery-powered applications?
Yes, due to its low power consumption, it is ideal for battery-powered applications.
- What are some common applications of the AD7694BRMZ?
Common applications include battery-powered equipment, data acquisition, instrumentation, medical instruments, and process control.
