Overview
The AD7904BRU, produced by Analog Devices Inc., is a high-speed, low-power, 4-channel successive approximation analog-to-digital converter (ADC). This component is part of the AD7904/AD7914/AD7924 family, with the AD7904 specifically being an 8-bit ADC. It operates from a single 2.7 V to 5.25 V power supply and features throughput rates up to 1 MSPS. The device includes a low noise, wide bandwidth track-and-hold amplifier capable of handling input frequencies exceeding 8 MHz. It is designed for easy interface with microprocessors or DSPs through the use of CS and serial clock signals.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 8-bit |
| Number of Channels | 4 single-ended |
| Throughput Rate | Up to 1 MSPS |
| Power Supply | 2.7 V to 5.25 V |
| Power Consumption (3 V supply) | 2 mA maximum |
| Power Consumption (5 V supply) | 2.7 mA maximum |
| Input Frequency Range | Exceeding 8 MHz |
| Package Type | 16-Lead TSSOP |
| Operating Temperature Range | −40°C to +85°C |
Key Features
- High Throughput with Low Power Consumption: The AD7904BRU offers high throughput rates up to 1 MSPS while maintaining low power consumption, making it suitable for power-sensitive applications.
- Four Single-Ended Inputs with Channel Sequencer: The device features four single-ended analog inputs and a channel sequencer, allowing for the selection and automatic cycling through a sequence of channels.
- Single-Supply Operation with VDRIVE Function: The ADC operates from a single power supply and includes a VDRIVE function, enabling the serial interface to connect directly to 3 V or 5 V processor systems.
- Flexible Power/Serial Clock Speed Management: The conversion rate can be managed by adjusting the serial clock speed, and the device includes two shutdown modes for enhanced power efficiency at lower throughput rates.
Applications
The AD7904BRU is suitable for a variety of applications requiring high-speed, low-power analog-to-digital conversion. These include industrial control systems, medical devices, automotive systems, and any other application where multiple analog inputs need to be converted quickly and efficiently. Its low power consumption and high throughput rate make it particularly useful in battery-powered devices and systems where power efficiency is crucial.
Q & A
- What is the resolution of the AD7904BRU ADC?
The AD7904BRU is an 8-bit ADC. - How many analog input channels does the AD7904BRU have?
The AD7904BRU has four single-ended analog input channels. - What is the maximum throughput rate of the AD7904BRU?
The maximum throughput rate is up to 1 MSPS. - What is the power supply range for the AD7904BRU?
The power supply range is from 2.7 V to 5.25 V. - How much power does the AD7904BRU consume at maximum throughput with a 3 V supply?
The power consumption is 2 mA maximum with a 3 V supply. - What is the operating temperature range of the AD7904BRU?
The operating temperature range is −40°C to +85°C. - Does the AD7904BRU support channel sequencing?
Yes, the AD7904BRU features a channel sequencer that allows automatic cycling through a sequence of channels. - Can the AD7904BRU interface directly with 3 V or 5 V processor systems?
Yes, the VDRIVE function allows the serial interface to connect directly to 3 V or 5 V processor systems. - How is the conversion rate managed in the AD7904BRU?
The conversion rate is managed by adjusting the serial clock speed, and the device includes two shutdown modes for enhanced power efficiency. - What type of package does the AD7904BRU come in?
The AD7904BRU comes in a 16-Lead TSSOP package.
