AD7961: 16-Bit, 5 MSPS PulSAR Differential ADC Data Sheet (Rev. B)8/5/2013574 kB
Features and Benefits
- Throughput: 5 MSPS
- 16-bit resolution with no missing codes
- SNR: 95.5 dB
- INL: ±0.2 LSB
- DNL: ±0.14 LSB
- Internal reference buffer
- Low power dissipation (39 mW)
- SAR architecture
- External Reference Options
- Serial LVDS interface
- 32-lead, 5mm × 5mm LFCSP (QFN)
- See datasheet for further details
The AD7961 is a 16-bit, 5 MSPS charge redistribution successive approximation (SAR), analog-to-digital converter (ADC). The SAR architecture allows unmatched performance both in noise and in linearity. The AD7961 contains a low power, high speed, 16-bit sampling ADC, an internal conversion clock and an internal reference buffer. On the CNV edge, the AD7961 samples the voltage difference between the IN+ and IN− pins. The voltages on these pins swing in opposite phase between 0 V and 4.096 V/5 V. The reference voltage is applied to the part externally. All conversion results are available on a single LVDS self-clocked or echo-clocked serial interface.
The AD7961 is available in a 32-lead LFCSP (QFN) with operation specified from −40°C to +85°C.
- Digital imaging systems
- MRI gradient control
- High speed data acquisition
- Test equipment
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)
The EVAL-AD7961FMCZ is a fully featured evaluation Kit designed to demonstrate the performance of the low power 16-bit,5 MSPS PulSAR® Differential ADC AD7961. This board operates in conjunction with the System Demonstration Platform (SDP) board, EVAL-SDP-CH1Z . The evaluation software is provided to enable the user to perform detailed analysis of the AD7961's performance. The technical user guide includes the detailed description of the operation and set up of the evaluation board and software when operated with the System Demonstration Platform board.
Documentation & Resources
UG-581: Evaluating the AD7961 16-Bit, 5 MSPS PulSAR Differential ADC8/6/20131793 kB
Increase Dynamic Range of SAR ADCs Using Oversampling6/1/2015
Get ADC Data Beyond the Data Sheet5/1/2015
Demystifying High-Performance Multiplexed Data-Acquisition Systems7/1/2014 Analog Dialogue
Let's Compare SAR & Δ-Σ Converters for a Mux'd DAS (Planet Analog, 12/2013)1/11/2014
• Part 1
• Part 2
• Part 3
• Part 4
• Part 5
Which Is Better: SAR or Delta-Sigma ADCs10/24/2013
Imaging Improvements: High performance data acquisition system enhances images for digital X-ray and MRI10/1/2013
Software & Systems Requirements
Tools & Simulations
Precision ADC Driver Tool
The Precision ADC Driver Tool is a web application that simulates the performance of precision ADC and driver combinations. Potential issues with driver selection, kickback settling, and distortion are flagged, and design tradeoffs can be quickly evaluated. Simulations and calculations include system noise, distortion, and settling of the ADC input
AD7961 Companion Parts
Recommended External Voltage References for the AD7961
- For low drift, low noise and high accuracy: ADR444, ADR445, ADR4550, ADR4540.
- For driving the voltage reference input: AD8031.
Recommended Low Dropout Regulators and Switchers for the AD7961
Recommended Driver Amplifiers for the AD7961
- For high frequency, low noise, low distortion applications: ADA4899-1, ADA4897-1, ADA4932-1.
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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.