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LTC2641/LTC2642: 16-/14-/12-Bit VOUT DACs in 3mm × 3mm DFN Data Sheet10/3/2017PDF299K
Overview
Features and Benefits
- Tiny 3mm × 3mm 8-Pin DFN Package
- Maximum 16-Bit INL Error: ±1LSB over Temperature
- Low 120µA Supply Current
- Guaranteed Monotonic over Temperature
- Low 0.5nV•sec Glitch Impulse
- 2.7V to 5.5V Single Supply Operation
- Fast 1µs Settling Time to 16 Bits
- Unbuffered Voltage Output Directly Drives 60k Loads
- 50MHz SPI™/QSPI™/MICROWIRE™ Compatible Serial Interface
- Power-On Reset Clears DAC Output to Zero Scale (LTC2641) or Midscale (LTC2642)
- Schmitt-Trigger Inputs for Direct Optocoupler Interface
- Asynchronous CLR Pin
- 8-Lead MSOP, 3mm × 3mm DFN, and 8-Lead SO Packages (LTC2641)
- 10-Lead MSOP and 3mm × 3mm DFN Packages (LTC2642)
Product Details
The LTC2641/LTC2642 are families of 16-, 14- and 12-bit unbuffered voltage output DACs. These DACs operate from a single 2.7V to 5.5V supply and are guaranteed monotonic over temperature. The LTC2641A-16/LTC2642A-16 provide 16-bit performance (±1LSB INL and ±1LSB DNL) over temperature. Unbuffered DAC outputs result in low supply current of 120µA and a low offset error of ±1LSB.
Both the LTC2641 and LTC2642 feature a reference input range of 2V to VDD. VOUT swings from 0V to VREF. For bipolar operation, the LTC2642 includes matched scaling resistors for use with an external precision op amp (such as the LT1678), generating a ±VREF output swing at RFB.
The LTC2641/LTC2642 use a simple SPI/MICROWIRE compatible 3-wire serial interface which can be operated at clock rates up to 50MHz and can interface directly with optocouplers for applications requiring isolation. A power-on reset circuit clears the LTC2641’s DAC output to zero scale and the LTC2642’s DAC output to midscale when power is initially applied. A logic low on the CLR pin asynchronously clears the DAC to zero scale (LTC2641) or midscale (LTC2642). These DACs are all specified over the commercial and industrial ranges.
Applications
- High Resolution Offset and Gain Adjustment
- Process Control and Industrial Automation
- Automatic Test Equipment
- Data Aquisition Systems
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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DC1096B - Demo Manual11/16/2016PDF331K
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Isolated Data Conversion7/13/2017PDF1M
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PWM to DC in One Cycle8/7/2014PDF509K
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Voltage Output DACs3/3/2011PDF797K
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3A Linear Regulator Can Be Easily Paralleled to Spread Power and Heat10/1/2011 LT Journal
Tools & Simulations
LTspice
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
LTC2641-12
LTC2641-14
LTC2641-16
LTC2641A-16
Linduino
Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.
Linduino code repository on GitHub and instructions on how to use the code.
IBIS Models
IBS
LTC2641 IBIS Model
17.00K
Product Recommendations
LTC2641 Companion Parts
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.View our quality and reliability program and certifications for more information.
PCN-PDN Information
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Sample & Buy
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Buy Now Pricing
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Lead Times
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Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
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.