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LTC2641IDD-12#PBF
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Product Detailed Parameters
- Description：IC DAC 12BIT V-OUT 8DFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：12
- Number of D/A Converters：1
- Settling Time：1µs (Typ)
- Output Type：Voltage - Unbuffered
- Differential Output：No
- Data Interface：SPI
- Reference Type：External
- Voltage - Supply, Analog：2.7V ~ 5.5V
- Voltage - Supply, Digital：2.7V ~ 5.5V
- INL/DNL (LSB)：±0.5 (Max), ±0.5 (Max)
- Architecture：R-2R
- Operating Temperature：-40°C ~ 85°C
- Package / Case：8-WFDFN Exposed Pad
- Supplier Device Package：8-DFN (3x3)
- Mounting Type：Surface Mount
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Overview
The LTC2641IDD-12#PBF is a 12-bit unbuffered voltage output digital-to-analog converter (DAC) from Analog Devices, housed in an 8-lead 3mm × 3mm DFN package. It operates on a single 2.7V to 5.5V supply with a typical current consumption of 120µA. The device features a 3-wire SPI/Microwire compatible serial interface supporting clock rates up to 50MHz. Key electrical specifications include a settling time of 1µs to ±0.5LSB, a glitch impulse of 0.5nV·sec, and guaranteed monotonicity over temperature. Integral nonlinearity (INL) and differential nonlinearity (DNL) are specified at ±0.5LSB.
Feature Summary
- 12-bit resolution with ±0.5LSB INL/DNL accuracy
- Unbuffered voltage output with low 120µA supply current
- Fast 1µs settling time and 0.5nV·sec glitch impulse
- Power-on reset clears DAC output to zero scale
Applications
- Process control and industrial automation
- Automatic test equipment
- Data acquisition systems
Procurement Notes
Verify the ordering suffix #PBF indicates lead-free finish and RoHS compliance. Confirm the 'I' grade designation corresponds to the -40°C to +85°C industrial operating temperature range. Ensure the DFN package exposed pad is soldered to PCB ground for proper thermal and electrical performance.
Selection Notes
Select this part for applications requiring high linearity in a compact footprint. The unbuffered output requires load resistance greater than 60kΩ to maintain specified linearity; use an external buffer if driving lower impedances. For bipolar operation, the LTC2642 variant is required as the LTC2641 supports unipolar output only.
Part Context
This component belongs to the LTC2641/LTC2642 family of 16-, 14-, and 12-bit DACs. The IDD suffix denotes the industrial temperature grade (-40°C to +85°C), while the 12 indicates 12-bit resolution. The PBF suffix specifies lead-free packaging. Other variants include the ACMS8/IMS8 MSOP packages and the LTC2642 bipolar version.
Replacement Considerations
Public confirmed substitute part numbers: LTC2641CDD-12#PBF (Commercial grade, 0°C to 70°C).
FAQ
How does the power-on reset function behave for the LTC2641?
When power is initially applied, the power-on reset circuit automatically clears the LTC2641’s DAC output to zero scale.
What is the maximum serial clock frequency supported?
The device supports a serial clock (SCLK) frequency up to 50MHz.
Can the LTC2641 generate a bipolar output directly?
No, the LTC2641 provides unipolar output (0V to VREF). Bipolar operation requires the LTC2642 variant with matched scaling resistors and an external op amp.
