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ADA4941-1:  Single-Supply, Differential 18-Bit ADC Driver

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The ADA4941-1 is a low power, low noise differential driver for ADCs up to 18 bits in systems that are sensitive to power. The ADA4941-1 is configured in an easy-to-use, single-ended-to-differential configuration and requires no external components for a gain of 2 configuration. A resistive feedback network can be added to achieve gains greater than 2. The ADA4941-1 provides essential benefits, such as low distortion and high SNR, that are required for driving high resolution ADCs.

With a wide input voltage range (0 V to 3.9 V on a single 5 V supply), rail-to-rail output, high input impedance, and a user-adjustable gain, the ADA4941-1 is designed to drive single-supply ADCs with differential inputs found in a variety of low power applications, including battery-operated devices and single-supply data acquisition systems.

The ADA4941-1 is ideal for driving the 16-bit and 18-bit PulSAR® ADCs such as the AD7687, AD7690, and AD7691.

The ADA4941-1 is manufactured on ADI’s proprietary second-generation XFCB process, which enables the amplifier to achieve 18-bit performance on low supply currents.

The ADA4941-1 is available in a small 8-lead LFCSP as well as a standard 8-lead SOIC and is rated to work over the extended industrial temperature range, −40°C to +125°C.

FEATURES and BENEFITS

  • Chinese data sheet available
  • Single-ended-to-differential converter
  • Excellent linearity
    Distortion −110 dBc @100 KHz for VO, dm = 2 V p-p
  • Low noise: 10.2 nV/√Hz, output-referred, G = 2
  • Extremely low power: 2.2 mA (3 V supply)
  • High input impedance: 24 MΩ
  • User-adjustable gain
  • High speed: 31 MHz, −3 dB bandwidth (G = +2)
  • Fast settling time: 300 ns to 0.005% for a 2 V step
  • Low offset: 0.8 mV max, output-referred, G = 2
  • Rail-to-rail output
  • See data sheet for additional features

ADA4941-1 Functional Block Diagram

Documentation

Title Content Type File Type
ADA4941-1: Single-Supply, Differential 18-Bit ADC Driver Data Sheet (Rev C, 08/2011) (pdf, 679 kB) Data Sheets PDF
AN-1026: High Speed Differential ADC Driver Design Considerations  (pdf, 355 kB) Application Notes PDF
CN-0033: Converting a Single-Ended Signal with the AD7984 Differential PulSAR ADC  (pdf, 98 kB) Circuit Note PDF
CN-0032: Converting a Single-Ended Signal with the AD7982 Differential PulSAR ADC  (pdf, 99 kB) Circuit Note PDF
MT-218: Multiple Feedback Band-Pass Design Example  (pdf, 0) Tutorials PDF
A Stress-Free Method for Choosing High-Speed Op Amps
A decision-tree approach to making the critical decision about high-speed op amp selection, including a look at some helpful tools.
Webcasts WEBCAST
UG-130: Differential Amplifier Evaluation Board for 8-lead SOIC and MSOP Packages  (pdf, 493 kB) User Guides PDF
SAR ADC & Driver Quick-Match Guide  (pdf, 251 kB)
Find drivers for ADI's most popular single-ended and differential SAR ADCs based on your specific application conditions.
Product Selection Guide PDF
Amplifiers for Video Distribution  (pdf, 115 kB) Product Selection Guide PDF
High Speed Amplifiers Selection Table  (pdf, 77 kB) Product Selection Guide PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADA4941 SPICE Macro Model SPICE Models HTML

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

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Price, packaging, availability

ADA4941-1 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADA4941-1YCPZ-R2 Status: Production 8 ld LFCSP (3x3mm) 8 Ind Reel, 250 $3.27 $3.27 Y  Material Info PCN Purchase
ADA4941-1YCPZ-R7 Status: Production 8 ld LFCSP (3x3mm) 8 Ind Reel, 1500 - $2.42 Y  Material Info PCN Purchase Sample
ADA4941-1YCPZ-RL Status: Production 8 ld LFCSP (3x3mm) 8 Ind Reel, 5000 - $2.42 Y  Material Info PCN Purchase
ADA4941-1YRZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $2.84 $2.42 Y  Material Info PCN Purchase Sample
ADA4941-1YRZ-R7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $2.42 Y  Material Info PCN Purchase
ADA4941-1YRZ-RL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $2.42 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADA4941-1 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADA4941-1YCP-EBZ Status: Production 8-Lead LFCSP Bare Evaluation Board $18.25 Yes -
ADA4941-1YCPZ-R7 Status: Production 8-Lead LFCSP - Yes -
ADA4941-1YR-EBZ Status: Production 8-Lead SOIC Bare Evaluation Board $18.25 Yes -
ADA4941-1YRZ Status: Production 8-Lead SOIC $3.99 Yes -

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.

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