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LTC2655CUF-L12#PBF
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Product Detailed Parameters
- Description：IC DAC 12BIT V-OUT 20QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：12
- Number of D/A Converters：4
- Settling Time：3.9µs (Typ)
- Output Type：Voltage - Buffered
- Differential Output：No
- Data Interface：I2C
- Reference Type：External, Internal
- Voltage - Supply, Analog：2.7V ~ 5.5V
- Voltage - Supply, Digital：2.7V ~ 5.5V
- INL/DNL (LSB)：±0.5, ±0.1
- Architecture：-
- Operating Temperature：0°C ~ 70°C
- Package / Case：20-WFQFN Exposed Pad
- Supplier Device Package：20-QFN (4x4)
- Mounting Type：Surface Mount
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Overview
The LTC2655CUF-L12#PBF is a quad I2C 12-bit rail-to-rail digital-to-analog converter with an integrated 1.25V reference, yielding a 2.5V full-scale output. It operates on a single 2.7V to 5.5V supply and features built-in high-performance output buffers guaranteed monotonic over temperature. The device supports standard (100kHz) and fast (400kHz) I2C modes, includes a power-on reset circuit configurable via the PORSEL pin, and utilizes a 20-lead 4mm × 4mm QFN package.
Feature Summary
- Quad 12-bit resolution with ±0.5 LSB INL and ±0.1 LSB DNL
- Integrated 1.25V reference providing 2.5V full-scale output
- Rail-to-rail output buffers with ultralow crosstalk (<1nV•s)
- Configurable power-on reset to zero-scale or mid-scale
Applications
- Mobile communications
- Process control and industrial automation
- Instrumentation
- Automatic test equipment
- Automotive systems
Procurement Notes
Verify the specific suffix #PBF indicates lead-free tape-and-reel packaging. Confirm the -L designation matches the required 2.7V–5.5V supply range and 2.5V full-scale output. Ensure the UF package type aligns with PCB footprint requirements for the 20-lead QFN.
Selection Notes
Select this part for applications requiring four independent voltage outputs with I2C control. The -L variant is suitable for lower voltage supplies compared to the -H option. Consider the external reference mode if a full-scale output exceeding 2.5V is needed by applying a voltage up to VCC/2 to the REFIN/OUT pin.
Part Context
This component belongs to the LTC2655 family of quad DACs. It shares architectural similarities with the LTC2654 (SPI interface) and other variants differing in resolution (16-bit) or full-scale voltage (-H option). The CU suffix denotes the commercial temperature grade (0°C to 70°C) and the UF package code.
Replacement Considerations
Public confirmed substitute part numbers: LTC2655CUF-H12#PBF (different full-scale voltage), LTC2655CGN-L12#PBF (different package). Verify interface compatibility and thermal performance when substituting.
