LTC1661

PRODUCTION

Micropower Dual 10-Bit DAC in MSOP

Part Models: 6
1ku List Price: Starting From $2.33

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Overview

Tiny: Two 10-Bit DACs in an 8-Lead MSOP—Half the Board Space of an SO-8
Micropower: 60μA per DAC Sleep Mode: 1μA for Extended Battery Life
Rail-to-Rail Voltage Outputs Drive 1000pF
Wide 2.7V to 5.5V Supply Range
Double Buffered for Independent or Simultaneous DAC Updates
Reference Range Includes Supply for Ratiometric 0V-to-V_CC Output
Reference Input Has Constant Impedance over All Codes (260kΩ Typ)—Eliminates External Buffers
3-Wire Serial Interface with Schmitt Trigger Inputs
Differential Nonlinearity: ≤±0.75LSB Max

The LTC1661 integrates two accurate, serially addressable, 10-bit digital-to-analog converters (DACs) in a single tiny MS8 package. Each buffered DAC draws just 60μA total supply current, yet is capable of supplying DC output currents in excess of 5mA and reliably driving capacitive loads up to 1000pF. Sleep mode further reduces total supply current to a negligible 1μA.

Proprietary, inherently monotonic voltage interpolation architecture provides excellent linearity while allowing for an exceptionally small external form factor. The double-buffered input logic provides simultaneous update capability and can be used to write to either DAC without interrupting sleep mode.

Ultralow supply current, power-saving sleep mode and extremely compact size make the LTC1661 ideal for battery-powered applications, while its straightforward usability, high performance and wide supply range make it an excellent choice as a general purpose converter.

For additional outputs and even greater board density, please refer to the LTC1660 micropower octal DAC for 10‑bit applications. For 8-bit applications, please consult the LTC1665 micropower octal DAC.

Applications

Mobile Communications
Digitally Controlled Amplifiers and Attenuators
Portable Battery-Powered Instruments
Automatic Calibration for Manufacturing
Remote Industrial Devices

Part Models: 6
1ku List Price: Starting From $2.33

Documentation

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.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC1661CMS8#PBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1661CMS8#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1661CN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1661IMS8#PBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1661IMS8#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC1661IN8#PBF	8-Lead PDIP (Narrow 0.3 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 5, 2024 - 24_0004 Epoxy Change from Henkel 8290 to 8290A for MSOP (3)
		PCN24_0004_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC1661CMS8#PBF	PRODUCTION
LTC1661CMS8#TRPBF	PRODUCTION
LTC1661IMS8#PBF	PRODUCTION
LTC1661IMS8#TRPBF	PRODUCTION
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0128_Form Material_Report
LTC1661CMS8#PBF	PRODUCTION
LTC1661CMS8#TRPBF	PRODUCTION
LTC1661IMS8#PBF	PRODUCTION
LTC1661IMS8#TRPBF	PRODUCTION
Oct 8, 2024 - 24_0234 Migrating Bottom Trace Code Marking to Top Side Laser Marking for PDIP Package
		PCN24_0234_Form Material_Report Marking Comparison
LTC1661CN8#PBF	PRODUCTION
LTC1661IN8#PBF	PRODUCTION
Oct 11, 2022 - 22_0241 Epoxy Change from Henkel 8290 to 8290A for PDIP Package
		PCN22_0241_Form Material_Report Qualification Results Summary
LTC1661CN8#PBF	PRODUCTION
LTC1661IN8#PBF	PRODUCTION
Aug 6, 2022 - 22_0172 Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG]
		PCN22_0172_Form Material_Report Delta Qualification Matrix
LTC1661CN8#PBF	PRODUCTION
LTC1661IN8#PBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Digital to Analog Converters (DACs) 1
LTC2632	PRODUCTION	Dual 12-/10-/8-Bit SPI V_OUT DACs with 10ppm/°C Reference
Interface Transceivers & Isolators 1
LTM2883	PRODUCTION	SPI/Digital or I²C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power

Tools & Simulations

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.

Evaluation Kits

LTC1661/LTC1662 2-Channel, 10-Bit, Micropower DACs

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Product Details

Demonstration circuit 2789A features the LTC®1661/ LTC1662, 2-channel, 10-Bit, micropower DACs in an 8-lead MSOP package. The DC2789A also features an LTC1258-4.1, a lower voltage reference. The LTC1661/ LTC1662 are ultralow power, fully buffered voltage output, dual 10-bit digital-to-analog converters (DACs).

Each LTC1662 channel draws just 1.7µA (typ) total supply-plus reference operating current, yet is capable of supplying DC output currents in excess of 1mA and reliably driving capacitive loads of up to 1000pF. Each LTC1661 channel draws 30µA.

Resources

DC2789A - Design Files
5/24/2018

DC2789A - Schematic
6/8/2018

DC2789A - Demo Manual
5/18/2018

Latest Discussions

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LTC1661

Overview

Documentation

Data Sheet 1

Reliability Data 1

Technical Articles 1

Product Selector Card 3