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LTC2686CUJ-16#PBF
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Product Detailed Parameters
- Description：IC DAC 16BIT V-OUT 40QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：16
- Number of D/A Converters：8
- Settling Time：18µs (Typ)
- Output Type：Voltage - Buffered
- Differential Output：No
- Data Interface：SPI
- Reference Type：External, Internal
- Voltage - Supply, Analog：4.75V ~ 5.25V
- Voltage - Supply, Digital：4.75V ~ 5.25V
- INL/DNL (LSB)：±3LSB (Max), ±1 (Max)
- Architecture：-
- Operating Temperature：0°C ~ 70°C
- Package / Case：40-WFQFN Exposed Pad
- Supplier Device Package：40-QFN (6x6)
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
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Overview
The LTC2686CUJ-16#PBF is an 8-channel, 16-bit voltage output SoftSpan DAC from Analog Devices. It features independently programmable output ranges of 0 V to 5 V, 0 V to 10 V, ±5 V, ±10 V, and ±15 V. The device includes a precision internal 4.096 V reference with ±10 ppm/°C drift and rail-to-rail output buffers capable of sourcing or sinking up to 55 mA. It supports flexible single- or dual-supply operation and utilizes a 3-wire SPI/MICROWIRE-compatible interface operating at clock rates up to 50 MHz. Key specifications include a maximum INL error of ±3 LSB and a settling time of 36 µs.
Feature Summary
- Eight independent channels with full 16-bit resolution across five programmable output ranges (±15 V max).
- Integrated precision 4.096 V reference with ±10 ppm/°C temperature coefficient.
- Rail-to-rail output buffers guaranteeing ±55 mA drive capability.
- Built-in analog multiplexer for monitoring output voltages, load currents, and junction temperature.
Applications
- Optical networking systems
- Automatic test equipment
- Process control and industrial automation
Procurement Notes
Verify the suffix #PBF indicates lead-free packaging compliant with RoHS standards. Confirm the CUJ package variant corresponds to the 6 mm × 6 mm, 40-lead LFCSP form factor. Ensure the 'I' temperature grade (-40°C to +85°C) matches system requirements, as the datasheet distinguishes between C, I, and H grades.
Selection Notes
Select this model for applications requiring high channel density and bipolar supply flexibility. The 16-bit resolution and ±3 LSB INL suit precision instrumentation. Consider the external reference mode if lower noise or different scaling is needed. Verify that the IOVCC range (1.71 V to VCC) aligns with the host controller logic levels.
Part Context
This component belongs to the LTC2686 family of SoftSpan DACs. The specific part number denotes the 16-bit resolution variant in the commercial temperature grade (C), packaged in a 40-lead LFCSP. Other variants include the 12-bit version and higher temperature grades (I, H).
Replacement Considerations
Direct pin-compatible replacements within the same family include the LTC2686IUJ-16#PBF (industrial temperature grade) and LTC2686HUJ-16#PBF (high temperature grade). The 12-bit versions (e.g., LTC2686CUJ-12#PBF) share the package but offer lower resolution.
