AD7893ARZ-5REEL7

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Data acquisition systems require Analog to Digital Converters (ADC) to transfer analog signals into digital format to be interpreted by microprocessors in order to display and store information. The AD7893ARZ-5REEL7 is an 8-bit low-power, low-voltage ADC that comes in Flexible and Standard versions to meet a variety of system requirements. The AD7893ARZ-5REEL7 has a full performance operating voltage range of 3V - 7V, and a lower operating voltage range of 2.3V - 4.3V.

The AD7893ARZ-5REEL7 is suitable for a wide range of applications, including portable and battery powered devices, data loggers, equipment for industrial, process and instrumentation control, energy management, and medical monitoring. These applications include audio/voice processing, low power sensors, remote sensing/telemetry systems, portable medical/phone/security equipment, multimedia/embedded systems, and battery-powered equipment.

The AD7893ARZ-5REEL7 utilizes an SAR (successive approximation register) architecture, consisting of an 8-bit SAR, an input-sample-and-hold circuit, and a reference voltage, as well as reference and MUX switches to connect the input signal to the ADC, and a logic control circuit to execute the SAR convert process. In the single-ended configuration, the MUX is connected to the input signal of the SAR in order to tie the negative terminal of the sample-and-hold amp to ground, so that the input range could be configured for unipolar or bipolar operation. The AD7893ARZ-5REEL7 has an integrated low pass filter on the input, which provides a high-rejection of out-of-band signals.

The power consumption of the AD7893ARZ-5REEL7 is extremely low, and the device only consumes 7.5 mW at a sample rate of 100 ksps. The low-power consumption eliminates the need for an additional voltage regulator, which results in a lower overall power consumption and system cost. Additionally, the ADC has a built-in input amplifier, drive, and comparator to maximize efficiency. The ADC features a fast conversion time of 1.25 μs, and a Sampling Rate range of 5k/s – 200k/s.

In order to fully utilize the features of the AD7893ARZ-5REEL7, the device must be connected to a power supply, an oscillator, a digital signal source and ground. The device can be powered up with an external oscillator signal and an input signal through the Microcontroller Interface (MIF). The ADC has a power-on reset that needs to be enabled before any signal can be sampled. The outputs of the ADC then provide values in digital binary-coded decimal (BCD).

The AD7893ARZ-5REEL7 is a complete high-performance, low-power Analog to Digital Converter for various data acquisition systems, designed for low-voltage, high-speed applications. It combines a low sample rate with a comprehensive feature set to make it suitable for numerous user requirements. This device is the ideal choice for applications that require a high-performance, low-power ADC with a low sample rate range.

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