DAC121C081_16 Datasheet, PDF (1/41 Pages) Texas Instruments – 12-Bit Micro Power Digital-to-Analog Converter

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DAC121C081, DAC121C085
SNAS395E – DECEMBER 2007 – REVISED JANUARY 2016
DAC121C081/DAC121C085 12-Bit Micro Power Digital-to-Analog Converter With an I²C-
Compatible Interface
1 Features
•1 Ensured Monotonicity to 12-Bits
• Low Power Operation: 156-µA Maximum at 3.3 V
• Extended Power Supply Range (2.7 V to 5.5 V)
• I²C-Compatible 2-Wire Interface Which Supports
Standard (100-kHz), Fast (400-kHz), and High-
Speed (3.4-MHz) Modes
• Rail-to-Rail Voltage Output
• Very Small Package
• Resolution: 12 bits
• INL: ±8 LSB (Maximum)
• DNL: 0.6 / –0.5 LSB (Maximum)
• Settling Time: 8.5 µs (Maximum)
• Zero Code Error: 10 mV (Maximum)
• Full-Scale Error: −0.7%FS (Maximum)
• Supply Power
– Normal: 380 µW (3 V) / 730 µW (5 V) (Typical)
– Power Down: 0.5 µW (3 V) / 0.9 µW (5 V)
(Typical)
2 Applications
• Industrial Process Control
• Portable Instruments
• Digital Gain and Offset Adjustment
• Programmable Voltage and Current Sources
• Test Equipment
3 Description
The DAC121C081 is a 12-bit, single-channel,
voltage-output digital-to-analog converter (DAC) that
operates from a 2.7-V to 5.5-V supply. The output
amplifier allows rail-to-rail output swing and has an
8.5-µs settling time. The DAC121C081 uses the
supply voltage as the reference to provide the widest
dynamic output range, and typically consumes 132
µA while operating at 5 V. It is available in 6-pin SOT
and WSON packages, and provides three address
options (pin selectable).
As an alternative, the DAC121C085 provides nine I²C
addressing options and uses an external reference. It
has the same performance and settling time as the
DAC121C081, and is available in an 8-lead VSSOP.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DAC121C081
WSON (6)
SOT (6)
2.20 mm × 2.50 mm
1.60 mm × 2.90 mm
DAC121C085
VSSOP (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
POWER-ON
RESET
Block Diagram
VA* VREF*
GND
DAC121C081 / DAC121C085
DAC
REGISTER
REF
12 BIT DAC
12
BUFFER
VOUT
12
I²C
INTERFACE
POWER-DOWN
CONTROL
LOGIC
2.5k
100k
ADR1* ADR0
SCL SDA
* NOTE: ADR1 and VREF are for the DAC121C085 only. The DAC121C085 uses an external
reference (VREF), whereas, the DAC121C081 uses the supply (VA) as the reference.
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.