Overview
The AD7655AST is a low-cost, 4-channel, 16-bit analog-to-digital converter (ADC) produced by Analog Devices Inc. This device is part of the PulSAR (Successive Approximation Register) ADC series and is designed for simultaneous sampling applications. It operates from a single 5 V power supply and features two low noise, wide bandwidth track-and-hold amplifiers. The AD7655AST is suitable for a variety of applications requiring high-speed and accurate analog-to-digital conversion.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16 bits |
| Sampling Rate | Up to 500 kSPS |
| Number of Analog Input Channels | 4 channels (dual-channel simultaneous sampling) |
| Supply Voltage | 5 V (analog and digital) |
| Operating Temperature Range | -40°C to +85°C |
| Package Type | 48-Lead LQFP (7mm x 7mm) |
| Output Format | Serial, Parallel, Word |
| Signal to Noise Ratio (SNR) | High SNR (details in datasheet) |
| Differential Nonlinearity (DNL) | -2 LSB |
Key Features
- Simultaneous sampling of two input pairs (INA1/INB1 or INA2/INB2) using track-and-hold amplifiers.
- High speed 16-bit ADC with internal conversion clock and error correction circuits.
- Low noise and wide bandwidth track-and-hold amplifiers.
- Support for both serial and parallel system interface ports.
- Reduced power mode (impulse mode) for low power applications.
- Compliance with AQEC standard for defense and aerospace applications (AD7655-EP model).
Applications
The AD7655AST is suitable for various applications requiring high-speed and accurate analog-to-digital conversion, including:
- Industrial process control and automation.
- Medical devices and diagnostic equipment.
- Aerospace and defense systems (AD7655-EP model).
- Data acquisition systems.
- Test and measurement equipment.
Q & A
- What is the resolution of the AD7655AST ADC?
The AD7655AST has a resolution of 16 bits. - What is the maximum sampling rate of the AD7655AST?
The maximum sampling rate is up to 500 kSPS. - How many analog input channels does the AD7655AST have?
The AD7655AST has 4 analog input channels, allowing for simultaneous sampling of two input pairs. - What is the supply voltage for the AD7655AST?
The supply voltage is 5 V for both analog and digital supplies. - What is the operating temperature range of the AD7655AST?
The operating temperature range is from -40°C to +85°C. - What package types are available for the AD7655AST?
The AD7655AST is available in a 48-Lead LQFP package. - What output formats does the AD7655AST support?
The AD7655AST supports serial, parallel, and word output formats. - Does the AD7655AST have any special power modes?
Yes, it has a reduced power mode (impulse mode) for low power applications. - Is the AD7655AST suitable for aerospace and defense applications?
Yes, the AD7655-EP model complies with AQEC standards for defense and aerospace applications. - What is the differential nonlinearity (DNL) of the AD7655AST?
The DNL is -2 LSB.
