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LTC2634HUD-HMI8#PBF
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Product Detailed Parameters
- Description：IC DAC 8BIT V-OUT 16QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：8
- Number of D/A Converters：4
- Settling Time：3.8µs (Typ)
- Output Type：Voltage - Buffered
- Differential Output：No
- Data Interface：SPI
- Reference Type：External, Internal
- Voltage - Supply, Analog：5V
- Voltage - Supply, Digital：5V
- INL/DNL (LSB)：±0.05, ±0.5 (Max)
- Architecture：-
- Operating Temperature：-40°C ~ 125°C
- Package / Case：16-WFQFN Exposed Pad
- Supplier Device Package：16-QFN (3x3)
- Mounting Type：Surface Mount
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Overview
The LTC2634HUD-HMI8#PBF is a quad 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 4.096V and operates on a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the -40°C to 125°C automotive temperature range, and communicates via a 50MHz SPI/MICROWIRE compatible 3-wire serial interface. Power-on reset defaults to mid-scale in external reference mode.
Feature Summary
- Quad 8-bit DACs with integrated 4.096V precision reference
- Automotive grade (-40°C to 125°C) with AEC-Q100 qualification
- Rail-to-rail output buffers with ultralow crosstalk (2.4nV•s)
- Power-on reset to mid-scale in external reference mode
Applications
- Mobile Communications
- Process Control and Industrial Automation
- Automatic Test Equipment
- Portable Equipment
- Automotive Systems
Procurement Notes
Verify the H-grade temperature rating and HMI power-on reset configuration against system requirements. Confirm the QFN package soldering specifications for the exposed pad ground connection. Ensure supply voltage sequencing respects the REF pin limits during power-up to maintain reliability.
Selection Notes
Select this part for applications requiring high channel count with moderate resolution and automotive reliability. The HMI suffix ensures outputs start at mid-scale upon power-up, which may be necessary if downstream circuits cannot tolerate zero-scale initialization. Verify that the 4.5V minimum supply voltage aligns with the system power architecture.
Part Context
This component belongs to the LTC2634 family, which offers 12-, 10-, and 8-bit resolutions in both QFN and MSOP packages. The HUD suffix denotes the Automotive temperature grade (H), QFN package (UD), and 8-bit resolution (8). The HMI variant specifically configures the internal power-on reset logic for mid-scale initialization in external reference mode.
Replacement Considerations
LTC2634IUD-HMI8#PBF: Industrial temperature grade (-40°C to 85°C). LTC2634CUD-HMI8#PBF: Commercial temperature grade (0°C to 70°C). LTC2634HUD-LMI8#PBF: Reset to mid-scale in internal reference mode.
