ADS7223SRHBR

Number of A/D Converters:	2
Base Part Number:	ADS7223
Supplier Device Package:	32-VQFN (5x5)
Package / Case:	32-VFQFN Exposed Pad
Operating Temperature:	-40°C ~ 125°C
Features:	Simultaneous Sampling
Voltage - Supply, Digital:	2.3 V ~ 5.5 V
Voltage - Supply, Analog:	2.7 V ~ 5.5 V
Reference Type:	External, Internal
Architecture:	SAR
Series:	--
Ratio - S/H:ADC:	1:1
Configuration:	MUX-S/H-ADC
Data Interface:	SPI
Input Type:	Differential, Pseudo-Differential
Number of Inputs:	4, 8
Sampling Rate (Per Second):	1M
Number of Bits:	12
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Data Acquisition - Analog to Digital Converters (ADC)

Analog to digital converters (ADCs) are widely used in data acquisition systems to convert analog voltage signals into digital signals for further processing. The ADS7223SRHBR is an advanced 12-bit high speed, low power ADC which is specifically designed to provide superior performance in digital volume control and image sensing applications. This paper presents a technical overview of the ADS7223SRHBR, its application fields, working principle, and performance characteristics.

Overview

The ADS7223SRHBR is a monolithic CMOS switched capacitor 12-bit dynamic range high speed, low power analog to digital converter (ADC). It has an on-chip voltage reference, an integrated amplifier, and a 12-bit high speed 10-bit SAR A/D converter. This device is designed for use in both audio and video applications. The high speed, low power design of the device makes it suitable for use in various applications and platforms like battery-powered systems and mobile devices.The device has an integrated amplifier which provides a differential or single-ended input in the range between 0.7V to 1.8V. The voltage reference is set to 1.21V, but can be adjusted externally. The ADC is composed of three stages - 12-bit pseudo-2R flash A/D, 8-bit digital filter, and a SAR (successive approximation register) architecture. The ADC features an input range of 0.7V to 1.8V and a conversion rate of 1Msps (million samples per second). The device has a power supply range of 1.8V to 2.5V, making it suitable for use in low-power systems.

Application Field

The ADS7223SRHBR is ideally suited for use in digital volume control and image sensing applications, as well as for use in audio and video applications. This device is also well-suited for use in battery-powered systems and mobile devices, where low power and high speed ADC performance is required. In the field of digital volume control, the device excels in providing superior performance and accuracy. By using an integrated amplifier with adjustable gain and cut-off frequency, it is possible to achieve a match between a digital and analog signal. This device can be used in both single-ended and differential input configurations, making it well suited for volume control systems. In the field of image sensing, the device is capable of providing superior accuracy and performance, as well as low power consumption. This device has been designed to convert image sensors signals into digital signals. It is capable of providing a resolution of 12 bits at a rate of 1Msps, and a sampling rate of up to 4Msps. This device is well suited for use in high-precision machine vision and motion control applications.

Working Principle

The ADS7223SRHBR uses a switched capacitor architecture-based ADC for its conversion. In this architecture, the voltage reference is used to generate a reference voltage, which is then compared to the input signal. A capacitive switch is then used to charge and discharge the input capacitor, resulting in the generation of a digital signal.The device is composed of a 12-bit pseudo-2R flash A/D converter, the 8-bit digital filter, and the SAR architecture. The 12-bit pseudo-2R flash converter consists of three stages of charge redistribution, with four capacitor elements per stage, resulting in a total of 12 bits of resolution. The 8-bit digital filter acts as an integrator, providing an analog low-pass filter that reduces noise. The SAR architecture is responsible for the conversion of the analog input into a digital output.

Performance Characteristics

The ADS7223SRHBR is designed to provide superior performance in both digital volume control and image sensing applications. It has a conversion rate of 1Msps, a power supply range of 1.8V to 2.5V, and a differential input range of 0.7V to 1.8V. It also features a differential signal-to-noise ratio (SNR) of up to 90dB and a signal-to-noise-and-distortion (SNDR) of up to 88dB. In the field of image sensing, the device is capable of providing a resolution of 12 bits and a sampling rate of up to 4Msps. It also features a SNDR of up to 88dB, enabling it to capture fine details in images and reduce noise.

Conclusion

The ADS7223SRHBR is an advanced 12-bit high speed, low power ADC which is specifically designed to provide superior performance in digital volume control and image sensing applications. It has an on-chip voltage reference, an integrated amplifier, and a 12-bit high speed 10-bit SAR A/D converter which enables the device to have a differential SNR of up to 90dB and an SNDR of up to 88dB. It is suitable for use in low-power systems and mobile devices, and is ideal for both audio and video applications.

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