UP DUAL 10-BIT DAC IN MSOP
LTC1661CMS8
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 (260kOhms Typ)—Eliminates External Buffers
3-Wire Serial Interface with Schmitt Trigger Inputs
Differential Nonlinearity: ±0.75LSB Max
Description
The LTC®1661 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.
Applications
Mobile Communications
Digitally Controlled Amplifiers and Attenuators
Portable Battery-Powered Instruments
Automatic Calibration for Manufacturing
Remote Industrial Devices