ADC32RF80IRMPT

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Analog-to-digital converters (ADCs) perform the conversion process necessary to convert the continuous analog signals in physical systems into digital signals necessary for digital computing: they are the essential components of any analog-to-digital system. The ADC32RF80IRMPT is a 8-bit, 200 Ksps ADC that is designed for battery-powered and portable low-power RF transceiver applications. It has an integrated low-dropout voltage regulator and a flexible input interface. The device is fully specified for operation from a single 3V supply, and has integrated features such as a track-and-hold amplifier, clock conditioning, and reference circuitry which will minimize the external circuit components.

Application Fields

The ADC32RF80IRMPT is especially well-suited for RF transceivers that use the Zigbee Pro or IEEE 802.15.4 protocols. Also suitable for other low-power applications like wireless sensor networks, remote control and instrumentation, body area networks, and Hearing Aids, this device provides excellent performance and flexibility.

Its wide bandwidth and fast switching characteristics make it ideal for digital pre-distortion (DPD) applications, enabling cost-effective and efficient DPD designs to improve the performance of power amplifier (PA) systems. The device features an ultralow noise distribution amplifier suitable for the direct connection of up to eight high input impedance analog signals, such as pH sensors and microphone inputs. The device also features a mini-DPD architecture for low-power DPD applications.

Working Principle

The ADC32RF80IRMPT is an 8-bit, 200 Ksps ADC designed for battery-powered and portable low-power RF transceiver applications. It has two major blocks, an analog signal path and a digital signal path.

In the analog signal path, the input signal is pre-processed with a pair of biasing circuits, these circuits adjust the input signal to meet the best signal linearity requirements of the ADC. After the biasing blocks, the signal is fed into a wideband track-and-hold amplifier which functions to achieve a gain of 16dB and keep a sample of the input signal during the ADC conversion. The signal is then sent to the successive approximation register (SAR) ADC, which uses a binary search algorithm depend on comparison both between input signals and the reference voltage and between the retrieved signal bits from the SAR. Finally, the converted signal is processed by the digital signal processor, producing a fully-digital compensated signal suitable for use in digital signal processing (DSP) applications.

The ADC32RF80IRMPT is optimized for low-power applications by featuring a distributed analog design. This design distributes the sensing circuitry into the analog signal path leading to improved power management. Furthermore, the ADC has a low-noise distribution amplifier and a mini-DPD architecture which is used to adjust the output signal in order to reduce distortion. This architecture also has a built-in programmable filter for digital design flexibility.

The ADC32RF80IRMPT provides excellent performance and flexibility for low-power applications. It features a wide bandwidth and fast switching characteristics for digital pre-distortion (DPD) applications, enabling cost-effective and efficient DPD designs to improve PA system performance. The device also features an ultralow noise distribution amplifier for the direct connection of up to eight high input impedance analog signals, such as pH sensors and microphone inputs. With its integrated low-dropout voltage regulator and a flexible input interface, the ADC32RF80IRMPT offers a wide range of applications in the field of data acquisition.

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