LTC1661 - Micropower Dual 10-Bit DAC in MSOP
Features
- 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-VCC 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
Typical Application
Description
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.
Linear Technology’s 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.
Packaging
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
| Part Number | Package | Code | Temp | Package Drawing |
RoHS |
|---|---|---|---|---|---|
| LTC1661CMS8#PBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LTC1661CMS8#TRPBF | MS-8 | MS8 | C | 05-08-1660 | Yes |
| LTC1661CN8#PBF | N-8 | N | C | 05-08-1510 (N8) | Yes |
| LTC1661IMS8#PBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
| LTC1661IMS8#TRPBF | MS-8 | MS8 | I | 05-08-1660 | Yes |
| LTC1661IN8#PBF | N-8 | N | I | 05-08-1510 (N8) | Yes |
Order Info
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Temp | Price (1-99) |
Price (1k)* |
RoHS | |
|---|---|---|---|---|---|---|
| LTC1661CMS8#PBF | MS-8 | C | $1.90 | $1.65 | Yes | |
| LTC1661CMS8#TRPBF | MS-8 | C | $1.71 | Yes | ||
| LTC1661CN8#PBF | N-8 | C | $1.90 | $1.65 | Yes | |
| LTC1661IMS8#PBF | MS-8 | I | $2.15 | $1.80 | Yes | |
| LTC1661IMS8#TRPBF | MS-8 | I | $1.86 | Yes | ||
| LTC1661IN8#PBF | N-8 | I | $2.15 | $1.80 | Yes | |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.Click here to view our complete list of demo boards
Applications
- Mobile Communications
- Digitally Controlled Amplifiers and Attenuators
- Portable Battery-Powered Instruments
- Automatic Calibration for Manufacturing
- Remote Industrial Devices
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Product Notifications
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Design Tools
Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:
- LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
- LTpowerCAD - A complete power supply selection, synthesis and design tool
- LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
- PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
- Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
- LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
- And More!
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
