Overview
Features and Benefits
- 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
- 100 dB SNR at 2.5 MHz output data rate
- 2.5 MHz maximum fully filtered output word rate
- Fully differential modulator input
- Programmable oversampling rate (8X to 256X)
- On-chip differential amplifier for signal buffering
- Low-pass finite impulse response (FIR) filter with default or user-programmable coefficients
- Modulator output mode
- Overrange alert bit
- Digital offset and gain correction registers
Product Details
The AD7760 is a high performance, 24-bit Σ-Δ analog-to-digital converter (ADC). It combines wide input bandwidth and high speed with the benefits of Σ-Δ conversion to achieve a performance of 100 dB SNR at 2.5 MSPS, making it ideal for high speed data acquisition. Wide dynamic range combined with significantly reduced antialiasing requirements simplify 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 AD7760 a compact, highly integrated data acquisition device requiring minimal peripheral component selection. In addition, the device offers programmable decimation rates, and the digital FIR filter can be adjusted if the default characteristics are not appropriate for the application. The AD7760 is ideal for applications demanding high SNR without a complex front-end signal processing design.
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, with 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 AD7760.
The reference voltage supplied to the AD7760 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 amplifier, further reducing the external signal conditioning requirements.
The AD7760 is available in an exposed paddle, 64-lead TQFP and is specified over the industrial temperature range from −40°C to +85°C.
APPLICATIONS
- Data acquisition systems
- Vibration analysis
- Instrumentation
Product Categories
Markets and Technologies
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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AN-282: Fundamentals of Sampled Data Systems2/14/2015PDF2131 kB
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AN-342: Analog Signal-Handling for High Speed and Accuracy2/14/2015PDF468 kB
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AN-280: Mixed Signal Circuit Technologies2/14/2015PDF2101 kB
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AN-389: Using Sigma-Delta Converters-Part 22/14/2015PDF590 kB
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AN-388: Using Sigma-Delta Converters-Part 12/14/2015PDF590 kB
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AN-311: How to Reliably Protect CMOS Circuits Against Power Supply Overvoltaging3/8/2008PDF217 kB
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AN-283: Sigma-Delta ADCs and DACs9/24/2002PDF1699 kB
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UG-593: Evaluating the AD7760 and AD7762 Using the EVAL-CED1Z (Rev. 0)9/24/2015PDF962 K
Tools & Simulations
Design Tools
Sigma-Delta ADC Tutorial
An interactive illustration showing the behavior of an idealized sigma-delta A/D converter.
Product Recommendations
AD7760 Companion Parts
Recommended Driver Amplifiers
- For low power, low frequency, small package: AD8519.
- For low noise and high frequency, try the AD8021 or the dual AD8022.: AD8021, AD8022.
- For low noise, low power and low frequency: OP184.
- For high frequency and low power: AD8031.
- For low power and 5V single supply: AD8605, AD8615, AD8655.
- For low noise and low power applications: ADA4841-1.
Recommended Voltage Reference
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
PCN-PDN Information
Support & Discussions
AD7760 Discussions
RE: EVAL-AD7760/AD7762EDZ + EVAL-CED1Z
3 week(s) ago in Precision ADCs
Sample & Buy
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Evaluation Boards
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.