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Analog Devices Inc. LTC2498HUHF#TRPBF
- Part No.:
- LTC2498HUHF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 38-WFQFN Exposed Pad
- Datasheet:
-
LTC2498HUHF#TRPBF.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 38QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,394
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Product details
Overview
LTC2498HUHF#TRPBF from Analog Devices (acquired Linear Technology) is a 24-bit, 16-channel (8-differential) delta-sigma ADC with Easy Drive input current cancellation, integrated temperature sensor (±2°C absolute accuracy), and programmable 50/60Hz rejection - designed for high-precision industrial data acquisition systems digitizing rail-to-rail, high-impedance sensors without external buffering.
For engineers reviewing the LTC2498HUHF#TRPBF datasheet, LTC2498HUHF#TRPBF pinout, LTC2498HUHF#TRPBF application, or LTC2498HUHF#TRPBF equivalent, key selection criteria include its 2 ppm INL, 600 nV RMS noise, –40°C to 125°C H-grade operation, 38-lead QFN package, and no-latency digital filter settling in one cycle after channel change.
Technical Context
The LTC2498HUHF#TRPBF implements a patented sampling scheme that auto-cancels differential input current, eliminating dynamic errors and enabling direct digitization of rail-to-rail signals with source impedances up to 10 MΩ. Its third-order delta-sigma modulator feeds a decimating FIR filter with simultaneous 50/60Hz rejection capability.
It integrates a precision PTAT temperature sensor (28 mV at 27°C, 93.5 µV/°C), internal oscillator (307.2 kHz), and configurable 4-wire SPI interface supporting both internal and external clock modes. The multiplexer output (MUXOUTP/N) allows sharing of external amplifiers across all 16 channels with continuous auto-calibration of offset and drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit with no missing codes - guarantees monotonicity and full dynamic range utilization for precision measurement. |
| INL | 2 ppm of VREF - enables sub-µV-level linearity critical for calibration-grade instrumentation. |
| Offset Error | 0.5 µV typical - supports DC-critical applications like strain gauge or thermocouple front-ends without zero-adjust circuitry. |
| RMS Noise | 600 nV - delivers 19.2 ENOB at 7.5 SPS, suitable for low-frequency sensor digitization with minimal averaging. |
| Input Range | GND to VCC common mode, ±0.5×VREF differential - accepts rail-to-rail inputs independent of reference voltage choice. |
| Temp Sensor Accuracy | ±2°C absolute, 1/30°C resolution - provides on-chip thermal monitoring without external components. |
| Supply | 2.7V to 5.5V, 160 µA conversion current - enables battery-powered or low-power industrial nodes. |
Pinout & Package
38-lead (5 mm × 7 mm) plastic QFN package with exposed pad (Pin 39 = GND). All ground pins (Pins 1, 3–6, 31–33) must be soldered to PCB ground plane for thermal and noise performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1,3–6,31–33) | Power & Signal Ground | Multiple low-impedance paths minimize ground bounce and improve PSRR during conversion. |
| CH0–CH15 (Pins 8–23) | Analog Input Channels | Configurable as 16 single-ended or 8 differential inputs; support >10 MΩ source impedance via Easy Drive cancellation. |
| COM (Pin 7) | Common Negative Input | Reference node for all single-ended measurements; extends input common-mode range to GND–0.3V to VCC+0.3V. |
| MUXOUTP/N (Pins 24,27) | Multiplexer Output | Enables shared external amplifier between all channels; eliminates need for 16 individual op-amps. |
| ADCINP/N (Pins 25,26) | ADC Input Terminals | Differential inputs to sigma-delta modulator; accept buffered or directly connected MUX outputs. |
| REF+/REF– (Pins 29,30) | Differential Reference | Set full-scale range (0.1V ≤ VREF ≤ VCC); reject common-mode noise up to 140 dB at DC/50/60Hz. |
| SDI/SDO/SCK/CS (Pins 34,37,38,36) | 4-Wire SPI Interface | Supports internal or external clocking; CS-driven wake/sleep control reduces average power to 1 µA in sleep mode. |
| fO (Pin 35) | Oscillator Control | Selects internal (307.2 kHz) or external clock; determines conversion time and notch filter center frequency. |
Key Features
| Feature | Design Value |
|---|---|
| Easy Drive Input Current Cancellation | Eliminates dynamic input current error - enables direct connection of high-impedance sensors (e.g., RTDs, thermistors) without buffer op-amps. |
| No Latency ΔΣ Architecture | Digital filter settles in one conversion cycle - first result after channel change is valid, critical for multiplexed real-time control loops. |
| Programmable Line Frequency Rejection | Configurable 50 Hz, 60 Hz, or simultaneous dual-notch filtering - suppresses mains interference in industrial environments without external filters. |
| Integrated Temperature Sensor | On-die PTAT sensor with ±2°C absolute accuracy - provides system thermal compensation without discrete sensor or routing complexity. |
| Auto-Calibration Engine | Continuous offset/drift correction of external amplifiers - maintains accuracy over temperature and time when sharing gain stages across channels. |
Applications
| Strain Gauge Load Cell Interface | Multi-Channel Thermocouple Scanner |
|---|---|
Use Scenario: Digitizing mV-level outputs from 16 bridge-based load cells in a weigh scale system with ambient temperature swings. IC Role / Device Role / Timing Role: 24-bit ADC with integrated temperature sensor and 50/60Hz rejection performs cold-junction compensation and mains-noise suppression per channel. Use Value: Eliminates 16 external instrumentation amplifiers and separate temperature sensors, reducing BOM cost by >40% and board area by 35%. | Use Scenario: Scanning 8 Type-K thermocouples in an industrial furnace controller requiring ±1°C total system accuracy. IC Role / Device Role / Timing Role: Configured in 8-differential mode with automatic channel sequencing; internal temp sensor provides real-time cold-junction reference. Use Value: Achieves <1 µV offset drift over –40°C to 125°C operating range, meeting IEC 61511 functional safety requirements for process control. |
| High-Accuracy Environmental Monitor | Calibration-Grade Data Logger |
Use Scenario: Logging humidity, pressure, and CO₂ sensor outputs in a lab-grade environmental chamber with 0.01% RH resolution. IC Role / Device Role / Timing Role: Digitizes conditioned analog outputs using MUXOUTP/N-shared op-amp; 600 nV RMS noise ensures sub-LSB stability over 24-hour periods. Use Value: Delivers verified 19.2 ENOB at 7.5 SPS - meets NIST-traceable calibration standards without post-processing averaging. | Use Scenario: Portable field logger capturing vibration, temperature, and strain data from rotating machinery for predictive maintenance analytics. IC Role / Device Role / Timing Role: Operates in 2x speed mode (15 Hz) with internal oscillator; sleep mode draws only 1 µA between samples to extend battery life. Use Value: Enables >12-month operation on two AA cells while maintaining 24-bit integrity across all 16 sensor inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision multi-channel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1258IRTCR | 24-bit, 8-channel, 30 kSPS, no integrated temp sensor, requires external reference and clock | Better speed but lacks Easy Drive, onboard oscillator, and simultaneous 50/60Hz rejection | Preferred when >1 kSPS throughput is required and system already includes precision reference/clock sources |
| MAX11206ETN+ | 24-bit, 8-channel, 10 SPS, integrated oscillator, but no temp sensor and only 50Hz or 60Hz (not simultaneous) rejection | Lower power (135 µA) but lacks dual-notch filtering and on-chip thermal sensing | Selected for ultra-low-power battery applications where dual-line rejection is not mandatory |
Compared with ADS1258IRTCR and MAX11206ETN+, the LTC2498HUHF#TRPBF uniquely combines rail-to-rail Easy Drive inputs, simultaneous 50/60Hz rejection, and integrated temperature sensing in a single H-grade QFN - simplifying design for harsh-environment industrial data loggers where component count and thermal compensation are critical.
Availability
LTC2498HUHF#TRPBF is available at Aetrix Electronics and suitable for industrial process control, precision environmental monitoring, and high-reliability test equipment requiring stable component supply across extended temperature ranges.
Supply support for LTC2498HUHF#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2498HUHF#TRPBF belongs to ADI's precision delta-sigma ADC product line, engineered specifically for high-accuracy, low-power, multi-sensor data acquisition in thermally demanding industrial and instrumentation applications.
FAQ
What is the operating temperature range for the LTC2498HUHF#TRPBF?
The LTC2498HUHF#TRPBF is rated for –40°C to +125°C operation, qualifying it for under-hood automotive, industrial motor drives, and oil & gas downhole equipment. This H-grade specification is confirmed in the Absolute Maximum Ratings table and applies across all electrical characteristics unless otherwise noted. The device maintains 2 ppm INL and 600 nV RMS noise within this full range.
Does the LTC2498HUHF#TRPBF require an external reference voltage?
No, the LTC2498HUHF#TRPBF does not require an external reference - it operates with any differential reference voltage from 0.1V to VCC applied across REF+ and REF– pins. However, an external precision reference may be used to achieve tighter system-level accuracy than the internal reference path allows. The device's 120 dB reference common-mode rejection ensures robustness against reference noise.
How does the Easy Drive technology in the LTC2498HUHF#TRPBF eliminate input current errors?
The LTC2498HUHF#TRPBF uses a patented sampling architecture that automatically cancels differential input current by balancing charge injection across successive sampling phases. This eliminates dynamic errors caused by source impedance mismatch - allowing direct connection of sensors with impedances up to 10 MΩ without external buffers while preserving DC accuracy and 2 ppm INL performance.
Can the LTC2498HUHF#TRPBF measure temperature internally and externally at the same time?
No - the LTC2498HUHF#TRPBF alternates between measuring external analog inputs (CH0–CH15) and its internal temperature sensor; both cannot be acquired simultaneously. However, the internal sensor can be read between external channel conversions with no performance penalty, enabling real-time thermal compensation of gain/offset drift in external signal chains during normal operation.
What package type and lead finish does the LTC2498HUHF#TRPBF use?
The LTC2498HUHF#TRPBF uses a 38-lead plastic QFN package (5 mm × 7 mm) with exposed pad, and features a lead-free (RoHS-compliant) finish. The part marking "2498" appears on the top surface, and the temperature grade "H" is indicated on the shipping tape-and-reel label - not on the device itself. Pin 39 (exposed pad) must be soldered to PCB ground for thermal and electrical performance.
LTC2498HUHF#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 38-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 7.5
- Number of Inputs:
- 8, 16
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- Temperature Sensor
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 38-QFN (5x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2498HUHF#TRPBF FAQ
1.How can I place an order for LTC2498HUHF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2498HUHF#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC2498HUHF#TRPBF reliable?
The price and inventory of LTC2498HUHF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2498HUHF#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2498HUHF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2498HUHF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2498HUHF#TRPBF?
LTC2498HUHF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2498HUHF#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC2498HUHF#TRPBF?
For technical support, including LTC2498HUHF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2498HUHF#TRPBF requirements.
6.How does Aetrix verify that LTC2498HUHF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2498HUHF#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC2498HUHF#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2498HUHF#TRPBF?
All LTC2498HUHF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2498HUHF#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC2498HUHF#TRPBF part is unused and in its original packaging.
Return procedure for LTC2498HUHF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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