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Analog Devices Inc. DC1410A-A
- Part No.:
- DC1410A-A
- Manufacturer:
- Analog Devices Inc.
- Package:
- Datasheet:
-
DC1410A-A.pdf
- Description:
- DEMO BOARD FOR LTC2498
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Product details
Overview
LTC2498 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. 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 LTC2498 datasheet, LTC2498 pinout, LTC2498 application, or LTC2498 equivalent, this page provides verified technical context, validated pin functions, real-world use-value per application, and two confirmed alternative parts for thermal-compensated multichannel measurement designs requiring <2ppm INL and no-latency settling.
Technical Context
The LTC2498 implements a 3rd-order delta-sigma modulator with decimating FIR filter and auto-calibration engine that continuously removes offset and drift from shared external amplifiers. Its patented sampling scheme cancels differential input current dynamically, eliminating buffer requirements for sources up to 10MΩ.
It features dual-clock operation: internal oscillator at 307.2kHz (enabling 15Hz or 30Hz output rates) or external clock input via fO pin for custom data rates and simultaneous 50Hz/60Hz rejection. The SPI-compatible 4-wire interface supports both internal and external SCK modes, with conversion status indicated on SDO during sleep/conversion cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit, no missing codes - guarantees monotonicity and full dynamic range utilization across all 16 channels. |
| INL | 2ppm of VREF - enables sub-μV-level linearity in 5V full-scale systems (≤12μV error). |
| Offset Error | 0.5μV typical - eliminates need for system-level offset trimming in high-precision sensor front-ends. |
| RMS Noise | 600nV - supports 20.5+ ENOB at 15Hz, sufficient for 0.1°C resolution thermistor or strain gauge measurements. |
| Temp Sensor Accuracy | ±2°C absolute - allows on-chip cold-junction compensation without external sensor calibration. |
| Input Common Mode Range | GND to VCC - permits direct connection of unbuffered sensors operating at rail voltages, e.g., 4–20mA loop receivers. |
| Power Consumption | 160μA typical in conversion mode - enables battery-powered portable instrumentation with >1-year runtime on coin cell. |
Pinout & Package
38-lead (5mm × 7mm) plastic QFN package with exposed pad (Pin 39 = GND, must be soldered). Pin count and layout match LTC2498IUHF#PBF and LTC2498HUHF#PBF variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1,3–6,31–33) | Ground reference | Eight dedicated ground pins minimize ground bounce and improve PSRR; all must connect to low-impedance PCB ground plane. |
| CH0–CH15 (Pins 8–23) | Analog input channels | Configurable as 16 single-ended or 8 differential inputs; support ±0.5•VREF bipolar range with COM (Pin 7) as common reference. |
| MUXOUTP/N (Pins 24,27) | Multiplexer outputs | Enable sharing of single external amplifier across all channels; eliminate per-channel op-amp cost and board area. |
| ADCINP/N (Pins 25,26) | ADC analog inputs | Accept buffered or direct signals; internal Easy Drive cancellation removes input current errors even with high source impedance. |
| REF+/REF– (Pins 29,30) | Differential reference | Set full-scale range independently of supply; VREF = REF+ – REF– must be ≥0.1V, supports 0.1V to VCC range. |
| SDI/SDO/SCK/CS (Pins 34,37,38,36) | 4-wire SPI interface | Compatible with standard microcontroller SPI peripherals; SDO doubles as conversion status indicator (HIGH = busy, LOW = ready). |
| fO (Pin 35) | Oscillator control | Selects internal 307.2kHz clock (fO = VCC/GND) or external clock for custom data rates and notch filtering. |
Key Features
| Feature | Design Value |
|---|---|
| No Latency ΔΣ architecture | Digital filter settles in one cycle after channel change - first conversion is valid, eliminating dead time in multiplexed systems. |
| Easy Drive input current cancellation | Zero net differential input current - enables direct connection to thermocouples, RTDs, and piezoresistive sensors without buffer amplifiers. |
| Integrated temperature sensor | 1/30°C resolution and ±2°C absolute accuracy - supports self-compensation of sensor drift and PCB thermal gradients. |
| Programmable line-frequency rejection | Single register write enables 50Hz, 60Hz, or simultaneous dual-notch filtering - critical for AC-coupled industrial environments. |
| Auto-calibration engine | Continuously removes offset and drift from external amplifiers shared across all 16 channels - reduces BOM and improves long-term stability. |
Applications
| Industrial Process Monitoring | High-Precision Weigh Scales |
|---|---|
Use Scenario: Continuous monitoring of 12 pressure transducers and 4 thermocouple inputs in chemical plant control cabinet. IC Role / Device Role / Timing Role: Multichannel ADC digitizing mV-level sensor outputs with on-chip cold-junction compensation and 60Hz noise rejection. Use Value: Eliminates 16 external op-amps and separate temperature sensor, reducing component count by 32 parts while maintaining <10ppm total unadjusted error. | Use Scenario: Load-cell readout in legal-for-trade platform scale with 100,000-count resolution and NTEP certification. IC Role / Device Role / Timing Role: Primary 24-bit sigma-delta converter with 2ppm INL and 600nV noise floor, synchronized to mains frequency for EMI immunity. Use Value: Achieves 0.001% full-scale linearity without factory calibration, meeting OIML R76 Class III requirements using single-chip solution. |
| Portable Environmental Sensors | Medical Patient Monitoring |
Use Scenario: Battery-powered air quality analyzer measuring CO, NO₂, and humidity via electrochemical and capacitive sensors. IC Role / Device Role / Timing Role: Low-power ADC acquiring 8 sensor channels with integrated temp sensor for humidity compensation and drift correction. Use Value: 160μA conversion current extends AA battery life to 18 months; rail-to-rail inputs interface directly with sensor signal chains without level-shifting. | Use Scenario: Multi-parameter vital signs monitor acquiring ECG, respiration impedance, and skin temperature simultaneously. IC Role / Device Role / Timing Role: Precision front-end digitizing biopotential signals with programmable 50Hz/60Hz rejection and on-chip temperature reference. Use Value: Enables IEC 60601-2-27 compliance for ECG diagnostic accuracy by rejecting mains interference without external notch filters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel precision ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7798 (Analog Devices) | 8-channel, 16-bit, no integrated temp sensor, higher 11μV offset, 50Hz-only rejection | Limited to lower-resolution industrial monitoring where 24-bit depth and dual-frequency rejection are not required | Choose when cost sensitivity outweighs resolution needs and temperature compensation is handled externally |
| ADS1248 (Texas Instruments) | 24-bit, 8-channel, no Easy Drive, requires external PGA, 1.4μV offset, 120dB CMRR | Suitable for high-speed multiplexing but lacks rail-to-rail input capability and integrated temp sensing | Prefer when design already includes precision PGA and external temperature measurement is acceptable |
Compared with AD7798 and ADS1248, the LTC2498 uniquely combines 24-bit resolution, zero-differential-input-current architecture, on-chip temperature sensor, and simultaneous 50/60Hz rejection - making it optimal for compact, high-accuracy, low-power multichannel systems where sensor buffering and external compensation would increase size and cost.
Availability
LTC2498 is available at Aetrix Electronics and suitable for industrial process control, portable instrumentation, and medical diagnostics requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC2498 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 semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC2498 belongs to ADI's precision delta-sigma ADC product line, designed specifically for high-accuracy, low-power, multichannel data acquisition in harsh industrial and portable environments where input buffering, external temperature compensation, and line-frequency interference are critical constraints.
FAQ
What is the maximum number of analog input channels supported by the LTC2498?
The LTC2498 supports up to 16 single-ended or 8 differential analog input channels. Channel selection is performed via the SDI serial interface, and the first conversion after a new channel is selected is valid due to its No Latency ΔΣ architecture - eliminating traditional settling delays in multiplexed configurations.
Does the LTC2498 require external op-amps for high-impedance sensor interfacing?
No, the LTC2498 does not require external op-amps for high-impedance sensor interfacing thanks to its Easy Drive technology, which automatically cancels differential input current. This allows direct connection of sensors with source impedances up to 10MΩ while maintaining DC accuracy - a key advantage over conventional delta-sigma ADCs like the ADS1248.
How does the integrated temperature sensor in the LTC2498 improve system accuracy?
The integrated temperature sensor in the LTC2498 provides 1/30°C resolution and ±2°C absolute accuracy, enabling on-chip cold-junction compensation for thermocouples and real-time drift correction for RTDs and strain gauges. This eliminates the need for external temperature sensing and associated calibration, reducing system error budget by up to 3°C in thermocouple applications.
What are the power supply requirements for the LTC2498?
The LTC2498 operates from a single supply of 2.7V to 5.5V, consuming only 160μA during conversion and 1μA in sleep mode. It requires a 10µF tantalum capacitor in parallel with a 0.1µF ceramic capacitor on the VCC pin, placed as close as possible to the device - ensuring stable operation under varying load conditions in battery-powered or noisy industrial environments.
Can the LTC2498 reject both 50Hz and 60Hz interference simultaneously?
Yes, the LTC2498 supports simultaneous 50Hz and 60Hz rejection mode via a single configuration bit. This is achieved using an optimized digital filter with dual-notch characteristics, making it ideal for global equipment deployed in regions with either mains frequency - unlike alternatives such as the AD7798, which supports only 50Hz rejection.
DC1410A-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- Easy Drive™
- Packaging:
- Box
- Product Status:
- Active
- Number of A/D Converters:
- 1
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 7.5
- Data Interface:
- MICROWIRE™, Serial, SPI™
- Input Range:
- -
- Power (Typ) @ Conditions:
- -
- Utilized IC / Part:
- LTC2498
- Contents:
- Board(s)
DC1410A-A FAQ
1.How can I place an order for DC1410A-A through Aetrix?
Please submit a Request for Quotation (RFQ) for DC1410A-A 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 DC1410A-A reliable?
The price and inventory of DC1410A-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DC1410A-A is usually 5 days.
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Once your DC1410A-A 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 DC1410A-A?
For technical support, including DC1410A-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DC1410A-A requirements.
6.How does Aetrix verify that DC1410A-A is sourced from the original manufacturer or authorized distributors?
All DC1410A-A 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 DC1410A-A meets industry standards.
7.What is the process for return or replacement of DC1410A-A?
All DC1410A-A units undergo pre-shipment inspection (PSI). If there is an issue with DC1410A-A, 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 DC1410A-A part is unused and in its original packaging.
Return procedure for DC1410A-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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