LTC1669| Datasheet

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FEATURES
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LTC1669 10-Bit Rail-to-Rail Micropower DAC with I2C Interface DESCRIPTION
The LTC 1669 is a 10-bit voltage output DAC with true buffered rail-to-rail output voltage capability. It operates from a single supply with a range of 2.7V to 5.5V. The reference for the DAC is selectable between the supply voltage or an internal bandgap reference. Selecting the internal bandgap reference will set the full-scale output voltage range to 2.5V. Selecting the supply as the reference sets the output voltage range to the supply voltage. The part features a simple 2-wire serial interface compatible with I2C that allows communication between many devices. The internal data registers are double buffered to allow for simultaneous update of several devices at once. The DAC can be put in low current power-down mode for use in power conscious systems. Power-on reset ensures the DAC output is at 0V when power is initially applied, and all internal registers are cleared. The LTC1669 is pin-for-pin compatible with the LTC1663. For SMBus-compatible designs, please refer to the LTC1663.
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.

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Micropower 10-Bit DAC in SOT-23 Low Operating Current: 60A Ultralow Power Shutdown Mode: 12A 2-Wire Serial Interface Compatible with I2CTM Selectable Internal Reference or Ratiometric to VCC Maximum DNL Error: 0.75LSB 8 User Selectable Addresses (MSOP Package) Single 2.7V to 5.5V Operation Buffered True Rail-to-Rail Voltage Output Power-On Reset 1.5V VIL and 2.1V VIH for SDA and SCL Small 5-Lead TSOT-23 and 8-Lead MSOP Packages

APPLICATIONS
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Digital Calibration Offset/Gain Adjustment Industrial Process Control Automatic Test Equipment Arbitrary Function Generators Battery-Powered Data Conversion Products

BLOCK DIAGRAM
4 (5) VCC 1.25V BANDGAP REFERENCE

Differential Nonlinearity (DNL)
1.0 0.8 VREF = VCC = 5V TA = 25 C

REFERENCE SELECT ERROR (LSB) 10-BIT BUFFERED VOUT DAC MSOP PACKAGE ONLY (6) AD0 (2) AD1 (3) AD2 2-WIRE INTERFACE SDA 1 (1) SCL 5 (4) GND 2 (7)
1669 BD

0.6 0.4 0.2 0 0.2 0.4 0.6 0.8 1.0 0 28 156 384 512 640 768 896 1024 CODE
1669 G02

10-BIT DAC LATCH VOUT 3 (8)

COMMAND LATCH

INPUT LATCH

NOTE: PIN NUMBERS IN PARENTHESES REFER TO THE MSOP PACKAGE

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