AD7657BSTZ-1

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Data Acquisition – Analog to Digital Converters (ADC) play a vital role in modern electronic systems, providing the ability to accurately convert analog signals into digital values. AD7657BSTZ-1 is a high-speed, low-power 14-bit SAR-based analog-to-digital converter (ADC). It is designed to handle multiplexed ADC channels and provides a full range of features required for sophisticated monitoring, measurement and control applications.

The AD7657BSTZ-1 is used in many applications such as test and measurement, medical imaging, smart grids, factory automation, solar cells, power supplies and other power-management applications. It is suitable for applications where good accuracy, low power consumption and small form factor are needed. Due to its low power consumption, the AD7657BSTZ-1 can operate from a single 3.3V or 5V supply.

The AD7657BSTZ-1 includes four analog input channels which can be multiplexed using the multiplexer (MUX) control connection. This allows for maximum flexibility and enables simultaneous sampling of all channels. The ADC contains integrated sample and hold circuitry which allows for sampling of non-inverting input channels without the need for separate components.

The AD7657BSTZ-1 uses an active-level sensing architecture for its SAR (Successive Approximation Register) conversion process. This architecture allows for quick and accurate conversions. The standard conversion rate is 25 kSPS, but the AD7657BSTZ-1 can be clocked to a maximum rate of 100 kSPS, allowing for faster sampling and improved resolution.

The AD7657BSTZ-1 also features a high dynamic range, allowing it to detect small signals in noisy environments. It provides ±2LSB INL accuracy, with a maximum differential nonlinearity (DNL) of 1 LSB. The device also features an internal reference voltage of 2.5V, which allows for increased accuracy when using the built-in reference.

The AD7657BSTZ-1 also includes integrated analog and digital I/O protection. The device includes multiple low-voltage protection circuits on the analog input pins which protect the analog inputs against overloads. Additionally, the device features digital over-voltage protection on all digital ports, further protecting the device from overloads. This ensures that the device is robust and reliable in demanding applications.

The AD7657BSTZ-1 offers various power saving features such as a shutdown mode, low power idle mode and standby mode. The shutdown mode enables the device to enter a low-power state when not in use, saving power and reducing the system’s overall power consumption. The low power idle mode allows the device to reduce power consumption when idle, saving even more power. The standby mode further reduces the device’s power consumption when it is not actively converting by keeping the analog inputs disconnected from the ADC. This reduces noise and power consumed by the device, enabling longer battery life if used in portable applications.

In addition to its power saving features, the AD7657BSTZ-1 provides several fault management features. It features an error indicator output which detects various types of errors such as input clipping, over-range and reference clipping. Additionally, the device features a reference clamp circuit which limits the reference output voltage to reduce errors caused by noise.

Overall, the AD7657BSTZ-1 is a high-performance ADC with features optimized for applications that require a small form factor, low power consumption and high accuracy. With its integrated analog and digital protection circuitry, power saving features and fault management features, it is well suited for many applications.

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