LTC2444IUHF Analog Devices Integrated Circuit (Quad Flat No-Lead) In Stock
LTC2444IUHF is a 24-bit delta-sigma ADC from Analog Devices featuring 8 analog input channels, 0.0015% maximum linearity error, and analog input range from -0.05 V to 2.75 V in a 38-pin QFN package. It delivers high-precision data acquisition with conversion times up to 170,000 µs for maximum noise rejection. Available worldwide through authorized Analog Devices distributors.
- Manufacturer
- Analog Devices
- Package
- Quad Flat No-Lead
- Pin Count
- 39
- Lifecycle
- OBSOLETE
- Datasheet
- LTC2444IUHF Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 24-bit delta-sigma conversion resolution for ultra-high-precision DC and low-frequency measurement
- 8 multiplexed analog input channels covering -0.05 V to 2.75 V input range in a single device
- 0.0015% maximum linearity error enabling sub-ppm-level accuracy in calibration and metrology instruments
- Selectable conversion time up to 170,000 µs for maximum noise rejection in electrically noisy environments
- Compact 38-pin QFN package (R-PQCC-N38) for space-efficient precision analog PCB layouts
Applications
LTC2444IUHF is designed for high-precision multi-channel data acquisition systems such as laboratory weigh scales, precision thermocouple data loggers, and scientific instrumentation requiring 24-bit resolution across 8 input channels without sacrificing linearity. Its 0.0015% linearity error and delta-sigma architecture suit applications in industrial process control where sub-millivolt accuracy over the full -0.05 V to 2.75 V input range is mandatory. Designers also integrate it into battery-powered portable calibrators and precision strain gauge bridges where long conversion times maximize noise rejection beyond 100 dB ENOB.
Specifications
| YTEOL | 0 |
| Analog Input Voltage-Max | 2.75V |
| Analog Input Voltage-Min | -0.05 V |
| Conversion Time-Max | 170000 µs |
| Converter Type | ADC, DELTA-SIGMA |
| JESD-30 Code | R-PQCC-N38 |
| JESD-609 Code | e0 |
| Linearity Error-Max (EL) | 0.0015% |
| Number of Analog In Channels | 8 |
| Number of Bits | 24 |
| Number of Functions | 1 |
| Output Bit Code | BINARY |
| Output Format | SERIAL |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC38,.2X.28,20 |
| Package Shape | RECTANGULAR |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Qualification Status | Not Qualified |
| Supply Current-Max | 11mA |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.30 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What resolution does LTC2444IUHF provide and how does 24-bit depth improve measurement accuracy over 16-bit alternatives?
LTC2444IUHF provides 24-bit resolution, representing 16,777,216 discrete levels versus 65,536 for a 16-bit ADC. This 256-fold increase in codes per volt allows measurement of signals down to sub-microvolt steps from a 2.75 V reference, critical in precision weigh-scale and thermocouple applications requiring less than 0.001% full-scale error.
How many analog input channels does LTC2444IUHF support and can they be used as differential pairs?
LTC2444IUHF integrates 8 analog input channels configurable as 8 single-ended inputs within the -0.05 V to 2.75 V range, or as 4 fully differential input pairs, allowing simultaneous connection of multiple bridge sensors, thermocouples, or voltage dividers in a single 38-pin QFN without external multiplexers.
What maximum conversion time does LTC2444IUHF support and how does choosing a longer conversion time affect noise performance?
Maximum conversion time is 170,000 µs; selecting longer conversion times engages higher-order digital filtering that attenuates 50 Hz and 60 Hz power-line interference by over 100 dB, making LTC2444IUHF well suited for industrial process monitoring in environments where EMI from motors and switching converters would otherwise corrupt 24-bit readings.
For a precision bridge measurement system, what linearity specification does LTC2444IUHF guarantee and how does that translate to weight accuracy?
LTC2444IUHF specifies a maximum linearity error of 0.0015%, equivalent to approximately 250 counts of error over the full 24-bit range. In a 10 kg weigh-scale with 1 g resolution, this corresponds to a maximum linearity-induced weight error below 0.15 g across the full measurement range, meeting class III legal-for-trade weighing requirements.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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