AD7763 24-Bit, 625 kSPS, 109 dB Sigma-Delta ADC with On-Chip Buffers, Serial Interface

PublishTime：2022-08-03

The AD7763 high performance, 24-bit, Σ-Δ analog-to-digital converter (ADC) combines wide input bandwidth and high speed with the benefits of Σ-Δ conversion, as well as performance of 107 dB SNR at 625 kSPS, making it ideal for high speed data acquisition. A wide dynamic range, combined with significantly reduced antialiasing requirements, simplifies the design process. An integrated buffer to drive the reference, a differential amplifier for signal buffering and level shifting, an overrange flag, internal gain and offset registers, and a low-pass, digital FIR filter make the AD7763 a compact, highly integrated data acquisition device requiring minimal peripheral component selection. In addition, the device offers programmable decimation rates and a digital FIR filter, which can be user-programmed to ensure that its characteristics are tailored for the user’s application. The AD7763 is ideal for applications demanding high SNR without necessitating the design of complex, front-end signal processing.
The differential input is sampled at up to 40 MSPS by an analog modulator. The modulator output is processed by a series of low-pass filters, the final filter having default or user-programmable coefficients. The sample rate, filter corner frequencies, and output word rate are set by a combination of the external clock frequency and the configuration registers of the AD7763.
The reference voltage supplied to the AD7763 determines the analog input range. With a 4 V reference, the analog input range is ±3.2 V differential-biased around a common mode of 2 V. This common-mode biasing can be achieved using the on-chip differential amplifiers, further reducing the external signal conditioning requirements.
The AD7763 is available in an exposed paddle, 64-lead TQFP_EP and is specified over the industrial temperature range from −40°C to +85°C.
■FEATURES
●120 dB dynamic range at 78 kHz output data rate
●100 dB dynamic range at 2.5 MHz output data rate
●112 dB SNR at 78 kHz output data rate
●107 dB SNR at 625kHz output data rate
●625kHz maximum fully filtered output word rate
●Programmable oversampling rate (32× to 256×)
●Fully differential modulator input
●On-chip differential amplifier for signal buffering
●Low-pass finite impulse response (FIR) filter with default or user-programmable coefficients
●Overrange alert bit
●Digital offset and gain correction registers
●Filter bypass modes
●Low power and power-down modes
●Synchronization of multiple devices via SYNC pin I^2S interface mode

Brand of Product：	ADI
Part#：	AD7763 、 AD7760 、 AD7762 、 AD7763BSVZ 、 AD7763BSVZ-REEL 、 EVAL-AD7763EDZ More Part#
Product Category：	24-Bit, 625 kSPS, 109 dB Sigma-Delta A/D Converters (ADC) More
Application：	[ Data acquisition systems ][ Vibration analysis ][ Instrumentation ] More
Data Type：	Datasheet More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：	TQFP_EP;SV-64-2
Language：	English Chinese Chinese and English Japanese
Date of Creation：	2019/04/09
Version Number：	Rev.B
Data Encoding：	D05476-0-1/14(B)
Data Size：	1.2 MB

Data section preview(2pages)

- The full preview is over. If you want to read the whole 32 page document,please Sign in/Register -

Download

+1 Like
Add to Favorites

Recommend

New Products & Solutions

More>

Technical Resources

More>

All reproduced articles on this site are for the purpose of conveying more information and clearly indicate the source. If media or individuals who do not want to be reproduced can contact us, which will be deleted.

Integrated Circuits