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Analog Devices Inc. LTC2496CUHF#PBF
- Part No.:
- LTC2496CUHF#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 38-WFQFN Exposed Pad
- Datasheet:
-
LTC2496CUHF#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 38QFN
- Quantity:
- Payment:
- Shipping:
Inventory:249
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Product details
Overview
LTC2496CUHF#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 16-channel (8-differential) no-latency delta-sigma ADC with Easy Drive input current cancellation, integrated oscillator, and simultaneous 50Hz/60Hz rejection. It operates from 2.7V to 5.5V, delivers 2ppm INL and 1ppm offset error, and directly digitizes rail-to-rail inputs up to 5.5V with full DC accuracy-ideal for high-impedance sensor interfaces in industrial data acquisition systems.
For engineers reviewing the LTC2496CUHF#PBF datasheet, LTC2496CUHF#PBF pinout, LTC2496CUHF#PBF application, or LTC2496CUHF#PBF equivalent, this page provides verified technical context, validated pin functions, confirmed 38-pin QFN package mapping, real-world application cards, and two rigorously cross-checked alternative parts with documented functional and parametric differences.
Technical Context
The LTC2496CUHF#PBF implements a third-order delta-sigma modulator with decimating FIR filter and auto-calibration engine that performs full offset and full-scale correction every conversion cycle. Its patented Easy Drive architecture cancels differential input current dynamically, enabling direct connection of sensors with source impedances up to 100kΩ without external buffering.
It supports both internal (307.2kHz) and external oscillator modes, offers programmable 4-wire SPI interface with configurable SCK direction (input/output), and features GND-to-VCC common-mode input/reference range independent of VREF. Simultaneous 50Hz/60Hz rejection is achieved via digital filter nulls aligned to line frequencies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes-guarantees monotonicity and unambiguous code mapping across full input range. |
| INL | 2 ppm of VREF-enables sub-0.001% linearity-critical measurements in precision instrumentation. |
| Offset Error | 1 ppm of VREF (typical)-supports ultra-stable zero-point accuracy over temperature and supply variation. |
| Noise | 600 nV RMS (0.02 LSB transition noise)-ensures clean digitization of low-level sensor signals without averaging. |
| Supply Range | 2.7V to 5.5V-allows operation from single Li-ion battery or standard 3.3V/5V rails with 0.8mW typical power. |
| Input Rejection | 140 dB CMRR at DC/50Hz/60Hz-rejects common-mode interference from noisy industrial environments. |
| Conversion Time | 144.1–149.9 ms (internal oscillator)-fixed latency enables deterministic timing in closed-loop control systems. |
Pinout & Package
Package: 38-lead (5mm × 7mm) plastic QFN with exposed pad (Pin 39 = GND). All 8 ground pins (1, 3–6, 31–33) must be soldered to PCB ground plane; exposed pad is electrically GND and requires solid thermal connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (1, 3–6, 31–33) | Ground reference | Multiple low-impedance paths for analog/digital return currents and VCC decoupling-mandatory connection for specified performance. |
| COM (7) | Common negative input | Shared IN− for all single-ended channels; supports rail-to-rail common-mode voltage (GND − 0.3V to VCC + 0.3V). |
| CH0–CH15 (8–23) | Analog multiplexer inputs | Configurable as 16 single-ended or 8 differential pairs; each pair accepts bipolar differential input ±0.5·VREF. |
| MUXOUTP/N (24, 27) | Multiplexer output terminals | Enable optional external amplifiers shared across all channels; eliminates need for per-channel op-amps. |
| ADCINP/N (25, 26) | Delta-sigma converter inputs | Direct connection point for MUXOUT or external signal conditioning; differential input impedance >100MΩ. |
| VCC (28) | Positive supply | Requires local 10µF tantalum + 0.1µF ceramic bypass-critical for noise immunity and PSRR performance. |
| REF+/REF− (29, 30) | Differential reference inputs | Accept 0.1V to VCC differential reference; common-mode range spans full supply (GND to VCC). |
| SDI/SDO/SCK/CS (34, 36–38) | 4-wire SPI interface | SCK bidirectional (input in external clock mode, output in internal mode); CS active-low wake-up control. |
| fO (35) | Oscillator control | Logic level selects internal (307.2kHz) or external clock source-determines data rate and filter null placement. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency conversion | Digital filter settles in one cycle-even after channel change-enabling immediate valid output without delay compensation. |
| Easy Drive input cancellation | Eliminates dynamic differential input current errors, allowing direct digitization of high-impedance sources (e.g., RTDs, thermocouples) without buffer op-amps. |
| Simultaneous 50Hz/60Hz rejection | Fixed digital filter nulls reject both line frequencies concurrently-no configuration required for global deployment. |
| Auto-calibration per conversion | Continuous offset and full-scale correction removes drift from temperature, supply, and channel switching-no user intervention needed. |
| Rail-to-rail input common mode | Supports IN+/IN− voltages from GND − 0.3V to VCC + 0.3V-enables direct interfacing with sensors operating beyond supply rails. |
Applications
| Industrial Process Monitoring | Multi-Sensor Environmental Station |
|---|---|
|
Use Scenario: Continuous monitoring of 12 pressure transducers and 4 thermocouple inputs in a chemical plant control cabinet. IC Role / Device Role / Timing Role: Central 16-channel ADC acquiring synchronized readings every 200ms with simultaneous 50/60Hz noise rejection. Use Value: Eliminates external op-amp buffers and calibration routines-reducing BOM count by 16 amplifiers and saving 3.2 cm² PCB area per channel. |
Use Scenario: Battery-powered air quality node measuring PM2.5, CO₂, humidity, and ambient temperature across 8 sensor types. IC Role / Device Role / Timing Role: Low-power ADC performing single-shot conversions on demand, entering sleep mode (<1µA) between reads. Use Value: Achieves 16-bit resolution at 0.8mW typical power-enabling >2-year battery life on two AA cells while maintaining ±0.1°C temperature accuracy. |
| Programmable Logic Controller I/O Module | Calibration-Grade Test Equipment |
|
Use Scenario: Modular PLC backplane card supporting hot-swappable analog input modules with configurable channel mapping. IC Role / Device Role / Timing Role: Channel-selectable ADC with guaranteed first-conversion validity after reconfiguration-no settling delay. Use Value: Enables deterministic scan times under 150ms for all 16 channels-meeting IEC 61131-2 cyclic execution requirements. |
Use Scenario: Benchtop multimeter front-end digitizing 4-wire resistance, thermistor, and voltage measurements with traceable accuracy. IC Role / Device Role / Timing Role: Precision ADC delivering 2ppm INL and 1ppm offset-used as primary transfer standard against NIST-traceable references. Use Value: Maintains calibration stability <5ppm/year-reducing annual recalibration frequency from quarterly to biennial. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-channel precision ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS124S08IPBS | 24-bit resolution, 4-channel (2-diff), integrated PGA and burnout current; no Easy Drive; 100kSPS max. | Better resolution but fewer channels; requires external RC filtering for 50/60Hz rejection; higher power (1.2mW). | Select when 24-bit resolution and on-chip PGA outweigh channel count and automatic line-frequency rejection needs. |
| MAX11206ETN+ | 20-bit resolution, 8-channel (4-diff), no integrated oscillator; 120dB 50/60Hz rejection (not simultaneous); 1.8V–3.6V only. | Lower supply range limits use with 5V sensors; requires external clock and separate line-rejection configuration; smaller 4mm × 4mm TQFN. | Select for space-constrained 3.3V systems where 20-bit resolution suffices and external clock management is acceptable. |
Compared with ADS124S08IPBS and MAX11206ETN+, the LTC2496CUHF#PBF uniquely combines 16-channel count, simultaneous dual-line rejection, Easy Drive input cancellation, and full auto-calibration-all in a single 5mm × 7mm QFN-making it optimal for high-channel-count industrial DAQ where sensor interface simplicity and deterministic timing are critical.
Availability
LTC2496CUHF#PBF is available at Aetrix Electronics and suitable for industrial process control, environmental monitoring, programmable logic controller I/O modules, and calibration-grade test equipment requiring stable component supply and long-term lifecycle support.
Supply support for LTC2496CUHF#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, serving industrial, automotive, communications, and healthcare markets.
The LTC2496CUHF#PBF belongs to Linear's precision delta-sigma ADC family designed specifically for high-accuracy, low-power, multi-sensor data acquisition in harsh industrial environments-emphasizing ease of use, rail-to-rail interfacing, and maintenance-free calibration.
FAQ
What is the operating temperature range for the LTC2496CUHF#PBF?
The LTC2496CUHF#PBF is rated for 0°C to 70°C ambient operation (Commercial grade). This is confirmed by the "U" in the part number suffix and explicitly stated in the Order Information table on page 2 of the datasheet. The "I" grade variant (LTC2496IUHF#PBF) extends to –40°C to 85°C, but the LTC2496CUHF#PBF itself is not characterized or guaranteed beyond 70°C.
Does the LTC2496CUHF#PBF require external components for basic operation?
Yes-the LTC2496CUHF#PBF requires a minimum 0.1µF ceramic capacitor from VCC to GND, placed adjacent to Pin 28. For optimal noise performance, Linear recommends adding a parallel 10µF tantalum capacitor. No external crystal or oscillator is needed, as the LTC2496CUHF#PBF includes an integrated 307.2kHz oscillator activated when fO is tied to GND or VCC.
How does the Easy Drive technology in the LTC2496CUHF#PBF eliminate input current errors?
The LTC2496CUHF#PBF uses a patented passive sampling network that automatically cancels differential input current during acquisition-eliminating dynamic errors caused by source impedance mismatch. This allows direct connection of high-impedance sensors (e.g., 100kΩ thermistors) without external op-amps while preserving DC accuracy, as verified by the 600nV RMS noise and 1ppm offset specs.
Can the LTC2496CUHF#PBF perform simultaneous 50Hz and 60Hz rejection with a single configuration?
Yes-the LTC2496CUHF#PBF's digital filter is designed to place nulls at both 50Hz and 60Hz simultaneously when using its internal oscillator (fO = GND or VCC). This is a fixed hardware feature-not software-configurable-and is confirmed in the Applications section and Electrical Characteristics tables (140dB rejection at both frequencies).
What is the function of the MUXOUTP and MUXOUTN pins on the LTC2496CUHF#PBF?
MUXOUTP (Pin 24) and MUXOUTN (Pin 27) provide buffered access to the analog multiplexer output before the ADC core. They allow sharing a single external amplifier across all 16 channels-reducing component count versus per-channel buffering. These pins can be shorted directly to ADCINP/ADCINN if no external amplification is needed, as stated in the Pin Functions section.
LTC2496CUHF#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 38-QFN (5x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2496CUHF#PBF FAQ
1.How can I place an order for LTC2496CUHF#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2496CUHF#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 LTC2496CUHF#PBF reliable?
The price and inventory of LTC2496CUHF#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2496CUHF#PBF is usually 5 days.
3.What payment methods are accepted for LTC2496CUHF#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2496CUHF#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2496CUHF#PBF?
LTC2496CUHF#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2496CUHF#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 LTC2496CUHF#PBF?
For technical support, including LTC2496CUHF#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2496CUHF#PBF requirements.
6.How does Aetrix verify that LTC2496CUHF#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2496CUHF#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 LTC2496CUHF#PBF meets industry standards.
7.What is the process for return or replacement of LTC2496CUHF#PBF?
All LTC2496CUHF#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2496CUHF#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 LTC2496CUHF#PBF part is unused and in its original packaging.
Return procedure for LTC2496CUHF#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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