My Inquiry
My Account
Analog Devices Inc. LTC2498CUHF#TRPBF
- Part No.:
- LTC2498CUHF#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 38-WFQFN Exposed Pad
- Datasheet:
-
LTC2498CUHF#TRPBF.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 38QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,974
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC2498CUHF#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 50Hz/60Hz rejection. It operates from 2.7V to 5.5V, delivers 600nV RMS noise, and supports rail-to-rail inputs with zero differential input current - enabling direct digitization of high-impedance sensors in precision industrial data acquisition systems.
For engineers reviewing the LTC2498CUHF#TRPBF datasheet, LTC2498CUHF#TRPBF pinout, LTC2498CUHF#TRPBF application, or LTC2498CUHF#TRPBF equivalent, key selection criteria include its 24-bit no-missing-codes resolution, 2ppm INL, 1ppm offset error, integrated oscillator, and 38-lead QFN (5mm × 7mm) package with exposed thermal pad - all critical for low-drift, multi-sensor measurement designs requiring simultaneous AC-line rejection.
Technical Context
The LTC2498CUHF#TRPBF implements a 3rd-order delta-sigma modulator with decimating FIR filter and auto-calibration engine that continuously removes external amplifier offset and drift. Its patented Easy Drive sampling scheme cancels differential input current dynamically, eliminating errors from source impedance mismatch without on-chip buffers.
It features a configurable 4-wire SPI interface supporting both internal SCK (38.4kHz) and external clock modes, selectable line-frequency rejection (50Hz, 60Hz, or simultaneous), and multiplexer output access (MUXOUTP/MUXOUTN) for shared external amplification across all 16 channels - with first-conversion validity after channel change and no latency digital filter settling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit, no missing codes - guarantees monotonicity and full dynamic range utilization in high-precision sensor digitization. |
| INL | 2ppm of VREF - enables sub-µV-level linearity for strain gauge or RTD measurements without post-calibration. |
| Offset Error | 0.5µV typical - eliminates need for system-level zero-point calibration in microvolt-range applications. |
| RMS Noise | 600nV - supports 22-bit effective resolution at 15Hz output rate, suitable for thermocouple and bridge sensor interfaces. |
| Input Common Mode Range | GND to VCC - allows direct connection of rail-to-rail sensors (e.g., 4–20mA receivers, pH electrodes) without level-shifting circuitry. |
| Temperature Sensor Accuracy | ±2°C absolute - provides reliable on-chip reference for ambient compensation in environmental monitoring nodes. |
| Supply Current (Conversion) | 160µA typical at 2.7V - enables battery-powered, low-duty-cycle data loggers with multi-year operation. |
| Package | 38-lead QFN (5mm × 7mm), exposed pad - ensures thermal stability and low-inductance grounding for noise-sensitive analog front-ends. |
Pinout & Package
38-lead plastic QFN (5mm × 7mm) with exposed thermal pad (Pin 39 = GND). All eight ground pins (1, 3–6, 31–33) must be soldered to PCB ground plane for optimal noise immunity and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1,3–6,31–33) | Ground reference and thermal path | Multiple low-impedance ground connections minimize ground bounce and improve PSRR above 120dB. |
| CH0–CH15 (Pins 8–23) | Analog input channels | Configurable as 16 single-ended or 8 differential inputs; support ±0.5•VREF differential range with COM pin as common negative reference. |
| MUXOUTP / MUXOUTN (Pins 24,27) | Multiplexer output terminals | Enable sharing of external instrumentation amplifiers across all channels; eliminate per-channel op-amp cost and layout area. |
| ADCINP / ADCINN (Pins 25,26) | ADC analog input terminals | Accept buffered or directly connected signals; internal Easy Drive cancellation removes input current errors even with >10MΩ source impedances. |
| REF+ / REF– (Pins 29,30) | Differential reference inputs | Support 0.1V to VCC reference span; common-mode range independent of VREF - simplifies ratiometric sensor interfacing. |
| SDI / SDO / SCK / CS (Pins 34,37,38,36) | 4-wire SPI interface | CS-active-low wake-up; SCK bidirectional (internal/external mode); SDO status indicator during conversion; SDI configures channel, speed, and rejection mode. |
| fO (Pin 35) | Frequency control input | Selects internal oscillator (307.2kHz) or external clock; determines conversion time (78.7ms to 163.5ms) and filter null placement for EMI rejection. |
Key Features
| Feature | Design Value |
|---|---|
| No Latency ΔΣ Architecture | Digital filter settles in one cycle after channel change - eliminates dead time between measurements in multiplexed sensor arrays. |
| Easy Drive Input Current Cancellation | Zero net differential input current - preserves accuracy with high-Z sources (e.g., piezoelectric sensors, pH probes) without external guarding or buffering. |
| Programmable Line-Frequency Rejection | 50Hz, 60Hz, or simultaneous dual-band rejection - suppresses mains interference in industrial environments without external notch filters. |
| Integrated Temperature Sensor | 1/30°C resolution and ±2°C absolute accuracy - enables on-board thermal compensation for sensor drift without discrete thermistor networks. |
| Auto-Calibration Engine | Continuous removal of external amplifier offset and drift - extends calibration interval and improves long-term stability in unattended monitoring systems. |
| Wide Common-Mode Input Range | GND to VCC independent of reference voltage - supports direct digitization of 0–5V, 0–10V, or ±5V industrial signals without level-shifting resistors. |
Applications
| Strain Gauge Bridge Monitoring | Thermocouple Cold-Junction Compensation |
|---|---|
Use Scenario: High-resolution measurement of microstrain in structural health monitoring systems using quarter/half/full Wheatstone bridges. IC Role / Device Role / Timing Role: 24-bit ADC digitizes mV-level bridge outputs; integrated temperature sensor measures local ambient for cold-junction correction. Use Value: 600nV RMS noise and 2ppm INL enable <1µε resolution; Easy Drive eliminates bridge imbalance errors from lead resistance and contact impedance. | Use Scenario: Accurate cold-junction temperature sensing and thermocouple voltage digitization in furnace controllers and process analyzers. IC Role / Device Role / Timing Role: Simultaneous reads of thermocouple differential voltage (CH0–CH1) and on-chip temperature (internal sensor) for real-time CJC calculation. Use Value: ±2°C absolute temperature accuracy and 0.5µV offset ensure <1°C total system error; programmable 50/60Hz rejection suppresses EMI from heating elements. |
| Multi-Channel Environmental Sensor Hub | High-Impedance Electrochemical Sensor Interface |
Use Scenario: Centralized acquisition of temperature, humidity, CO₂, and particulate sensors in smart building air quality nodes. IC Role / Device Role / Timing Role: 16-channel multiplexer sequentially samples analog outputs from diverse sensors; internal oscillator synchronizes conversions. Use Value: Single-supply 2.7–5.5V operation and 160µA conversion current enable ultra-low-power wireless node design; GND-to-VCC input range accepts all sensor output types. | Use Scenario: Direct digitization of pH, ORP, and ion-selective electrode outputs with impedances >1GΩ in water quality analyzers. IC Role / Device Role / Timing Role: ADCINP/ADCINN inputs accept high-Z electrode signals; Easy Drive cancellation prevents bias current-induced voltage errors. Use Value: Zero differential input current and 11pF input capacitance prevent signal loading and phase shift; 24-bit resolution resolves sub-mV pH changes over 0–14 range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1258IRTCR | 24-bit, 16-channel, but no integrated temperature sensor; requires external reference and clock; higher 1.2mW power consumption. | Lacks on-chip thermal sensing - necessitates separate temperature IC and additional PCB area for reference/oscillator. | Choose when maximum channel count (16 SE/8 diff) and SPI compatibility are prioritized over integrated features and ultra-low power. |
| AD7195BRUZ | 24-bit, 8-channel (4 diff), includes PGA and burnout current sources; 1.1mW power; no Easy Drive input cancellation. | Lower channel count and no differential input current cancellation - limits use with very high-impedance sensors without external guarding. | Prefer for applications requiring programmable gain and sensor excitation, where fewer channels suffice and external buffer design is acceptable. |
Compared with ADS1258IRTCR and AD7195BRUZ, the LTC2498CUHF#TRPBF uniquely combines integrated temperature sensing, Easy Drive input cancellation, and 38-lead QFN packaging - delivering lower BOM count, reduced layout complexity, and superior high-impedance signal integrity in space-constrained industrial data loggers.
Availability
LTC2498CUHF#TRPBF is available at Aetrix Electronics and suitable for precision industrial data acquisition, environmental monitoring, and sensor fusion systems requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for LTC2498CUHF#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 LTC2498CUHF#TRPBF belongs to ADI's legacy Linear Technology precision delta-sigma ADC product line, engineered specifically for low-noise, multi-channel sensor digitization in harsh industrial environments where accuracy, reliability, and ease of integration are paramount.
FAQ
What is the operating temperature range for the LTC2498CUHF#TRPBF?
The LTC2498CUHF#TRPBF is rated for 0°C to 70°C ambient operation (C-grade). This specification is confirmed in the Absolute Maximum Ratings table and Order Information section of the official datasheet. The device uses internal thermal compensation to maintain 2ppm INL and ±2°C temperature sensor accuracy across this full range, making it suitable for commercial and light-industrial environments where extended temperature grades are not required.
Does the LTC2498CUHF#TRPBF require an external reference voltage?
Yes, the LTC2498CUHF#TRPBF requires an external differential reference applied to REF+ and REF– pins. The reference voltage range is 0.1V to VCC, and the device supports ratiometric operation - meaning the full-scale input range scales linearly with VREF. No internal reference is provided; however, the integrated oscillator and temperature sensor operate independently of the reference, ensuring stable timing and thermal measurement regardless of VREF choice.
How does the Easy Drive technology in the LTC2498CUHF#TRPBF eliminate input current errors?
The LTC2498CUHF#TRPBF implements a patented sampling scheme that automatically cancels differential input current by balancing charge injection across successive sampling phases. This eliminates dynamic errors caused by source impedance mismatch - allowing accurate digitization of signals from sources with impedances up to 10MΩ without external buffers. The technique is intrinsic to the modulator architecture and requires no user configuration; it functions continuously during all conversion modes.
Can the LTC2498CUHF#TRPBF measure its own die temperature?
Yes, the LTC2498CUHF#TRPBF includes an integrated PTAT (proportional-to-absolute-temperature) sensor with 1/30°C resolution and ±2°C absolute accuracy over 0°C to 70°C. To read die temperature, the user configures the ADC to select the internal sensor channel via SDI command - no external components are needed. The output is a calibrated 24-bit code directly convertible to °C using the documented transfer function (27.8mV at 27°C, 93.5µV/°C slope).
What is the purpose of the MUXOUTP and MUXOUTN pins on the LTC2498CUHF#TRPBF?
The MUXOUTP and MUXOUTN pins on the LTC2498CUHF#TRPBF provide buffered access to the analog multiplexer output before the ADC core. They enable external instrumentation amplifiers to be shared across all 16 input channels - reducing component count, board area, and matching errors. When used, the amplifier output connects directly to ADCINP/ADCINN, and the auto-calibration engine continuously corrects for its offset and drift, preserving system-level accuracy without manual recalibration.
LTC2498CUHF#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 38-QFN (5x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2498CUHF#TRPBF FAQ
1.How can I place an order for LTC2498CUHF#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2498CUHF#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 LTC2498CUHF#TRPBF reliable?
The price and inventory of LTC2498CUHF#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2498CUHF#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2498CUHF#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2498CUHF#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2498CUHF#TRPBF?
LTC2498CUHF#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2498CUHF#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 LTC2498CUHF#TRPBF?
For technical support, including LTC2498CUHF#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2498CUHF#TRPBF requirements.
6.How does Aetrix verify that LTC2498CUHF#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2498CUHF#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 LTC2498CUHF#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2498CUHF#TRPBF?
All LTC2498CUHF#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2498CUHF#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 LTC2498CUHF#TRPBF part is unused and in its original packaging.
Return procedure for LTC2498CUHF#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC2498CUHF#TRPBF Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
