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Analog Devices Inc. LTC2496IUHF#PBF
- Part No.:
- LTC2496IUHF#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 38-WFQFN Exposed Pad
- Datasheet:
-
LTC2496IUHF#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 38QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,647
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Product details
Overview
LTC2496IUHF#PBF from Analog Devices (formerly Linear Technology) is a 16-channel (8-differential), 16-bit No Latency ΔΣ ADC with Easy Drive input current cancellation. It operates from 2.7V to 5.5V, achieves 2ppm INL and 1ppm offset error, and delivers simultaneous 50Hz/60Hz rejection - enabling direct digitization of rail-to-rail, high-impedance sensor signals in industrial process control systems.
For engineers reviewing the LTC2496IUHF#PBF datasheet, LTC2496IUHF#PBF pinout, LTC2496IUHF#PBF application, or LTC2496IUHF#PBF equivalent, key selection considerations include its zero-differential-input-current architecture, integrated oscillator, 38-pin QFN package, and guaranteed no-missing-codes performance across –40°C to +85°C.
Technical Context
The LTC2496IUHF#PBF implements a third-order delta-sigma modulator with decimating FIR filtering and on-chip autocalibration that executes full offset and full-scale correction every conversion cycle. Its patented Easy Drive sampling scheme cancels differential input current dynamically, eliminating buffer requirements for sensors with source impedances up to 100kΩ.
It supports both internal (307.2kHz) and external oscillator modes, configurable via the fO pin, and offers dual serial interface timing modes: internal SCK output (38.4kHz) or external SCK input (up to 4MHz). The device maintains GND-to-VCC common-mode input range independent of reference voltage, and rejects 50Hz/60Hz line noise simultaneously without notch filter trade-offs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and unambiguous digital representation across full input range. |
| INL | 2ppm of VREF - ensures ≤0.0002% full-scale deviation, critical for precision instrumentation calibration. |
| Offset Error | 1ppm of VREF - enables sub-microvolt DC accuracy without system-level trimming. |
| Noise | 0.6µVRMS - supports 16-bit effective resolution even with low-noise external references. |
| Power Supply | 2.7V to 5.5V - allows direct interfacing with 3.3V or 5V microcontrollers and industrial I/O rails. |
| Temp Range | –40°C to +85°C - qualified for industrial environments without derating or thermal management overhead. |
| Rejection | Simultaneous 50Hz/60Hz - eliminates need for external synchronous sampling or software post-processing. |
Pinout & Package
Package: 38-lead (5mm × 7mm) plastic QFN with exposed pad (Pin 39 = GND), requiring soldering to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pins 1,3–6,31–33) | Ground reference | Eight dedicated ground pins minimize ground bounce and ensure stable reference for analog and digital sections. |
| CH0–CH15 (Pins 8–23) | Analog input channels | Support programmable single-ended or differential configurations; all pins tolerate –0.3V to VCC+0.3V absolute voltage. |
| COM (Pin 7) | Common negative input | Shared IN– for single-ended mode; enables 16 single-ended or 8 differential inputs without external mux reconfiguration. |
| MUXOUTP/N (Pins 24,27) | Multiplexer outputs | Allow optional external amplifiers to be shared across all channels; enable signal conditioning before ADCINP/N. |
| ADCINP/N (Pins 25,26) | ADC analog inputs | Differential inputs to the ΔΣ modulator; accept rail-to-rail signals with zero differential input current due to Easy Drive. |
| REF+/REF– (Pins 29,30) | Differential reference | Accept 0.1V to VCC differential reference; common-mode range spans GND to VCC - decouples reference design from supply rails. |
| fO (Pin 35) | Oscillator control | Selects internal (307.2kHz) or external clock; determines conversion time and digital filter null placement for EMI rejection. |
| CS/SDI/SCK/SDO (Pins 34,36–38) | 4-wire SPI interface | Compatible with standard SPI controllers; supports internal/external SCK modes and channel selection during data output. |
Key Features
| Feature | Design Value |
|---|---|
| No latency conversion | Digital filter settles in one cycle - first result after channel change is valid and meets full specs, eliminating acquisition dead time. |
| Easy Drive input cancellation | Zero differential input current - enables direct connection of thermocouples, RTDs, and bridge sensors without op-amp buffers or matched RC networks. |
| Auto-calibration per conversion | Continuous offset and full-scale correction - removes drift dependencies on temperature, supply, and channel switching without interrupting measurement flow. |
| Rail-to-rail input common mode | GND to VCC independent of reference - simplifies sensor front-end design by removing level-shifting requirements for bipolar or wide-range signals. |
| Integrated oscillator | 307.2kHz internal clock - eliminates external crystal or oscillator component while maintaining precise 50/60Hz rejection nulls. |
Applications
| Industrial Process Control | Direct Sensor Digitization |
|---|---|
Use Scenario: Monitoring multi-point temperature and pressure in PLC-based factory automation systems with distributed analog sensors. IC Role / Device Role / Timing Role: 16-channel ADC digitizes 4–20mA loop transducers and thermistor networks, providing synchronized readings at 6.9Hz with simultaneous line-frequency rejection. Use Value: Eliminates external multiplexers and instrumentation amplifiers, reducing BOM count and board area while maintaining ±2ppm INL across operating temperature. | Use Scenario: Direct digitization of unbuffered thermocouple outputs in portable handheld test equipment. IC Role / Device Role / Timing Role: LTC2496IUHF#PBF acts as front-end sensor interface, using Easy Drive to cancel thermocouple junction currents and deliver cold-junction-compensated readings without op-amps. Use Value: Achieves <1µV offset drift over –40°C to +85°C, enabling <0.1°C temperature resolution without periodic recalibration. |
| Instrumentation | Data Acquisition System |
Use Scenario: High-accuracy benchtop multimeter measuring DC voltage, resistance, and continuity with autoranging capability. IC Role / Device Role / Timing Role: Core 16-bit ADC provides primary measurement engine with auto-zeroed offset and full-scale calibration, supporting 6½-digit resolution via oversampling. Use Value: 0.6µVRMS noise and 2ppm INL ensure traceable metrology-grade accuracy without external chopper stabilization. | Use Scenario: Modular DAQ module for environmental monitoring, acquiring humidity, CO₂, and particulate sensor outputs across 16 channels. IC Role / Device Role / Timing Role: LTC2496IUHF#PBF serves as unified analog front end, scanning all sensors sequentially with automatic gain/offset compensation per channel. Use Value: Simultaneous 50Hz/60Hz rejection prevents mains-induced artifacts in battery-powered field deployments near AC infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit multi-channel delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1248IPWR | 24-bit resolution, 4.17SPS max, no integrated oscillator, requires external clock or crystal; 32-pin TSSOP. | Targeted at ultra-high-resolution, low-speed applications (e.g., weigh scales); lacks simultaneous 50/60Hz rejection. | Choose ADS1248IPWR when >16-bit resolution is mandatory and line-frequency rejection can be handled externally. |
| MAX11206ETX+ | 24-bit resolution, 10SPS max, internal oscillator, 20-pin TQFN; only 8 input channels (4 differential). | Optimized for compact, low-power portable instrumentation; smaller footprint but half the channel count. | Choose MAX11206ETX+ when space-constrained designs require 24-bit resolution and ≤8 channels suffice. |
Compared with ADS1248IPWR and MAX11206ETX+, the LTC2496IUHF#PBF uniquely balances 16-bit precision, 16-channel flexibility, simultaneous line-frequency rejection, and zero-differential-input-current operation - making it optimal for industrial sensor hubs where channel density, DC accuracy, and EMI robustness are co-prioritized.
Availability
LTC2496IUHF#PBF is available at Aetrix Electronics and suitable for industrial process control, instrumentation, data acquisition systems, and direct sensor digitization requiring stable component supply across extended temperature ranges.
Supply support for LTC2496IUHF#PBF 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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC2496IUHF#PBF belongs to Linear's precision delta-sigma ADC product line, engineered specifically for high-accuracy, low-power, multi-channel sensor digitization in harsh industrial environments.
FAQ
What is the operating temperature range for the LTC2496IUHF#PBF?
The LTC2496IUHF#PBF is specified for operation from –40°C to +85°C, qualifying it for industrial-grade applications without thermal derating. This grade is explicitly denoted by the "I" suffix in the part number and confirmed in the Absolute Maximum Ratings table. All key specifications-including INL, offset error, and power supply rejection-are guaranteed over this full range, not just at 25°C.
Does the LTC2496IUHF#PBF require an external oscillator?
No, the LTC2496IUHF#PBF includes an integrated 307.2kHz oscillator and operates fully autonomously with fO tied to GND or VCC. An external oscillator is optional and used only to adjust conversion rate or shift digital filter nulls-e.g., for custom EMI frequencies. When using the internal oscillator, no external timing components are needed, simplifying layout and reducing BOM cost.
How does Easy Drive technology benefit sensor interfacing in the LTC2496IUHF#PBF?
Easy Drive in the LTC2496IUHF#PBF cancels differential input current dynamically during sampling, enabling direct connection of high-impedance sensors (e.g., thermocouples, RTDs, strain gauges) without external op-amp buffers. This preserves DC accuracy-verified at <1ppm offset drift-even with source impedances up to 100kΩ-and eliminates errors from mismatched external RC networks.
Can the LTC2496IUHF#PBF perform simultaneous 50Hz and 60Hz rejection?
Yes, the LTC2496IUHF#PBF achieves simultaneous 50Hz and 60Hz line-frequency rejection through its proprietary digital filter architecture-guaranteed in the Electrical Characteristics table under "Input Normal Mode Rejection 50Hz/60Hz ±2%" (87dB min). This occurs automatically with no configuration required, making it ideal for global deployments where mains frequency varies by region.
What is the significance of the "UHF" package designation in LTC2496IUHF#PBF?
The "UHF" in LTC2496IUHF#PBF denotes the 38-lead, 5mm × 7mm plastic QFN package with exposed thermal pad (Pin 39 = GND). This package provides low thermal resistance (θJA = 34°C/W) and excellent high-frequency EMI immunity-critical for precision ADCs in noisy industrial environments. The exposed pad must be soldered to the PCB ground plane for proper thermal dissipation and signal integrity.
LTC2496IUHF#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 38-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 6.9
- 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:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 38-QFN (5x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2496IUHF#PBF FAQ
1.How can I place an order for LTC2496IUHF#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2496IUHF#PBF 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 LTC2496IUHF#PBF reliable?
The price and inventory of LTC2496IUHF#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2496IUHF#PBF is usually 5 days.
3.What payment methods are accepted for LTC2496IUHF#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2496IUHF#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2496IUHF#PBF?
LTC2496IUHF#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2496IUHF#PBF 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 LTC2496IUHF#PBF?
For technical support, including LTC2496IUHF#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2496IUHF#PBF requirements.
6.How does Aetrix verify that LTC2496IUHF#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2496IUHF#PBF 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 LTC2496IUHF#PBF meets industry standards.
7.What is the process for return or replacement of LTC2496IUHF#PBF?
All LTC2496IUHF#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2496IUHF#PBF, 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 LTC2496IUHF#PBF part is unused and in its original packaging.
Return procedure for LTC2496IUHF#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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