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LTC2672CUH-16#PBF
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Product Detailed Parameters
- Description：IC DAC 16BIT A-OUT 32QFN
- Series：SoftSpan™
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：16
- Number of D/A Converters：5
- Settling Time：21.1µs (Typ)
- Output Type：Current - Unbuffered
- Differential Output：No
- Data Interface：Serial, SPI
- Reference Type：External, Internal
- Voltage - Supply, Analog：2.85V ~ 5.5V
- Voltage - Supply, Digital：1.7V ~ 5.5V
- INL/DNL (LSB)：±12, ±0.45LSB
- Architecture：Current Source
- Operating Temperature：0°C ~ 70°C
- Package / Case：32-WFQFN Exposed Pad
- Supplier Device Package：32-QFN (5x5)
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
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Overview
The LTC2672CUH-16#PBF is a five-channel, 16-bit current source digital-to-analog converter (DAC) in a 32-lead LFCSP package. It features per-channel programmable output current ranges from 3.125 mA to 300 mA and guarantees a maximum dropout voltage of 0.6 V at 200 mA. The device includes an internal precision reference with a maximum temperature coefficient of 10 ppm/°C and supports flexible single- or dual-supply operation. Each channel has a dedicated supply pin operating from 2.1 V to VCC, with internal switches allowing connection to an optional negative supply.
Feature Summary
- Five independent channels with 16-bit resolution and eight selectable current ranges up to 300 mA
- Guaranteed low dropout voltage of 0.6 V at 200 mA with dedicated supply pins per channel
- Internal precision 1.25 V reference with 10 ppm/°C maximum temperature coefficient
- Integrated analog multiplexer for monitoring channel voltages and currents
Applications
- Tunable lasers
- Semiconductor optical amplifier biasing
- Resistive heaters
- Current mode biasing
Procurement Notes
Verify the specific suffix #PBF indicates tube packaging and confirm the H-grade temperature rating (-40°C to +125°C) matches the application requirements. Ensure the LFCSP-32 footprint aligns with the PCB layout guidelines provided in the datasheet outline dimensions section.
Selection Notes
Select this component when multiple high-compliance current sources are required in a compact form factor. The SoftSpan feature allows per-channel range programming, enabling optimized power dissipation. Verify that the load termination and combining channel configurations meet the system's total current and linearity specifications.
Part Context
This part belongs to the LTC2672 family of SoftSpan DACs, which also includes 12-bit variants and WLCSP packages. The CUH-16 designation specifies the commercial temperature range variant within the broader product line, while the #PBF suffix denotes the lead-free tube packaging format.
Replacement Considerations
Direct substitutes include other LTC2672 variants such as the LTC2672HUH-16#PBF for extended temperature grades or the LTC2672CUH-12#PBF for 12-bit resolution applications. Cross-family replacements like the LTC2662 offer similar functionality but may differ in package type or specific electrical characteristics.
