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Analog Devices Inc. LTC2486CDE#PBF
- Part No.:
- LTC2486CDE#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC2486CDE#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:459
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Product details
Overview
LTC2486CDE#PBF from Analog Devices (acquired Linear Technology) is a 16-bit, 4-channel (2-differential) delta-sigma ADC with integrated PGA, Easy Drive input current cancellation, and on-chip temperature sensor. It delivers 2 ppm INL, 600 nV RMS noise, 50/60 Hz simultaneous line rejection, and operates from 2.7V to 5.5V supply. It directly digitizes rail-to-rail, high-impedance sensor signals in industrial instrumentation and process control systems.
For engineers reviewing the LTC2486CDE#PBF datasheet, LTC2486CDE#PBF pinout, LTC2486CDE#PBF application, or LTC2486CDE#PBF equivalent, key selection criteria include its zero-differential-input-current architecture, programmable gain (1–256), internal oscillator, 14-lead DFN package, and guaranteed no-latency settling after channel changes.
Technical Context
The LTC2486CDE#PBF uses a 3rd-order delta-sigma modulator with decimating FIR filter and auto-calibration engine. Its Easy Drive technology cancels differential input current via patented sampling, enabling accurate digitization of sources up to 10 MΩ without external buffering.
It supports dual-speed operation (1× and 2× output rate), programmable line-frequency rejection (50 Hz, 60 Hz, or both), and flexible input configuration - any combination of single-ended or differential channels (CH0–CH3, COM) with GND-to-VCC common-mode range independent of reference voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit, no missing codes - ensures monotonicity and full code coverage across full-scale range. |
| INL | 2 ppm of VREF - enables ±0.0002% full-scale accuracy for precision measurement systems. |
| Output Noise | 600 nV RMS (1× speed) - supports sub-microvolt signal resolution in low-noise applications. |
| Gain Range | Programmable 1× to 256× in 8 steps - allows direct interface with mV-level sensors (e.g., load cells, RTDs). |
| Temp Sensor Accuracy | ±2°C absolute, 0.5°C resolution - provides on-chip thermal monitoring without external components. |
| Supply Current | 160 µA typical (conversion), 1 µA (sleep) - enables battery-powered or energy-constrained designs. |
| Common-Mode Range | GND to VCC, independent of VREF - simplifies biasing for unbuffered sensors with wide output swing. |
Pinout & Package
Package: 14-lead (4 mm × 3 mm) plastic DFN with exposed pad (Pin 15 = GND, must be soldered).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| fO | Frequency control input | Selects internal oscillator (GND) or external clock source to adjust conversion rate and filter nulls. |
| SDI | Serial data input | Configures gain, channel, speed mode, and line-rejection setting during SPI command phase. |
| SCK | Bidirectional serial clock | Acts as output (internal SCK mode) or input (external SCK mode); determines timing domain for data transfer. |
| CS | Active-low chip select | Wakes device from sleep, initiates data I/O, and aborts transfer if raised mid-cycle. |
| SDO | Three-state serial data output | Outputs 24-bit result; also serves as conversion status flag (HIGH = in progress, LOW = complete). |
| COM | Common negative input | Shared IN− for all single-ended channels; supports rail-to-rail common-mode voltage (GND to VCC). |
| CH0–CH3 | Analog input channels | Configurable as single-ended (vs. COM) or differential pairs (e.g., CH0+/CH1−); support ±FS input range. |
| REF+/REF− | Differential reference inputs | Set full-scale range (±0.5·VREF/Gain); VREF may be 0.1V to VCC, with ≥0.1V differential. |
Key Features
| Feature | Design Value |
|---|---|
| No Latency DS™ architecture | Digital filter settles in one conversion cycle - first result after channel or mode change is valid and accurate. |
| Easy Drive™ input current cancellation | Eliminates dynamic input current errors - enables direct connection to high-impedance sensors without buffer op amps. |
| Simultaneous 50 Hz/60 Hz rejection | Integrated notch filtering rejects both mains frequencies in a single acquisition - critical for global industrial deployments. |
| Integrated temperature sensor | On-die PTAT sensor with factory-trimmed calibration - reduces BOM count and PCB area for thermal compensation. |
| 2× speed mode | Doubles output data rate (e.g., 15 Hz → 30 Hz) with minor noise trade-off (0.85 µV RMS) - balances speed and precision. |
Applications
| Industrial Process Monitoring | High-Impedance Sensor Digitization |
|---|---|
Use Scenario: Continuous monitoring of pressure, flow, and level transmitters in chemical plants with 4–20 mA loop-powered or millivolt-output sensors. IC Role / Device Role / Timing Role: Precision front-end ADC acquiring buffered/unbuffered analog signals while rejecting 50/60 Hz noise from nearby motor drives and lighting. Use Value: Eliminates need for external instrumentation amplifiers and active filters, reducing system cost and board space by >30%. | Use Scenario: Direct digitization of thermocouples, RTDs, and strain gauges with source impedances >1 MΩ in portable test equipment. IC Role / Device Role / Timing Role: Delta-sigma converter with zero-differential-input-current architecture ensuring DC accuracy without external buffering. Use Value: Maintains 16-bit linearity and <1 µV offset drift even with 10 MΩ source impedance - avoids gain/offset errors from input bias current. |
| Temperature-Compensated Instrumentation | Low-Power Data Acquisition Nodes |
Use Scenario: Embedded calibration of sensor modules where on-chip temperature reading corrects gain/offset drift in real time. IC Role / Device Role / Timing Role: Dual-function device acting as primary ADC and thermal reference - synchronized sampling of signal and die temperature. Use Value: Enables software-based 2-point temperature compensation using factory-trimmed sensor (±2°C absolute accuracy). | Use Scenario: Battery-operated environmental sensors logging temperature, humidity, and gas concentration over months on coin-cell power. IC Role / Device Role / Timing Role: Ultra-low-power ADC with 1 µA sleep current and automatic wake-on-CS, minimizing quiescent consumption. Use Value: Achieves >5-year battery life at 1-sample-per-minute duty cycle - validated across 0°C to 70°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS124S08IPWR | 24-bit resolution, 4-channel, integrated PGA and reference; no on-chip temp sensor; SPI interface; 32-pin TSSOP. | Higher resolution suited for weigh scales and precision RTD systems; lacks simultaneous 50/60 Hz rejection. | Choose for 24-bit metrology-grade accuracy where lower noise and higher resolution outweigh missing line-rejection features. |
| MAX11206ETK+ | 18-bit, 4-channel, internal oscillator, 50/60 Hz rejection; no integrated temp sensor; 16-pin TQFN. | Lower resolution but superior PSRR (>120 dB) and wider VREF range (100 mV–5.5 V); optimized for noisy industrial supplies. | Prefer when supply ripple rejection is critical and on-chip temperature sensing is not required. |
Compared with ADS124S08IPWR and MAX11206ETK+, the LTC2486CDE#PBF uniquely combines 16-bit precision, simultaneous 50/60 Hz rejection, integrated temperature sensor, and Easy Drive architecture - making it optimal for compact, self-compensating sensor nodes where board space and component count are constrained.
Availability
LTC2486CDE#PBF is available at Aetrix Electronics and suitable for industrial process control, portable instrumentation, and sensor module design requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC2486CDE#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2486CDE#PBF belongs to ADI's precision delta-sigma ADC product line, designed specifically for low-power, high-accuracy sensor interfacing in space- and energy-constrained applications - emphasizing ease of use, noise immunity, and integrated functionality.
FAQ
What is the operating temperature range for the LTC2486CDE#PBF?
The LTC2486CDE#PBF is specified for the commercial temperature range of 0°C to 70°C. This grade is validated per the Absolute Maximum Ratings table and Electrical Characteristics sections of the official datasheet, with performance parameters (e.g., INL, offset error, noise) guaranteed across this full range. The 'C' suffix explicitly denotes this temperature grade.
Does the LTC2486CDE#PBF require an external reference voltage?
No - the LTC2486CDE#PBF accepts an external differential reference (REF+/REF−) but does not require it. It can operate with internal reference derived from VCC when configured for temperature measurement (minimum REF = 2V). For highest accuracy, however, an external precision reference is recommended, with VREF ranging from 0.1V to VCC and ≥0.1V differential.
How does the Easy Drive technology in the LTC2486CDE#PBF improve measurement accuracy?
The Easy Drive technology in the LTC2486CDE#PBF eliminates dynamic differential input current through automatic cancellation during sampling. This prevents voltage drops across high-impedance sensor sources (e.g., thermocouples, pH electrodes), preserving DC accuracy without external op-amp buffers - verified by <1 µV offset drift at 10 MΩ source impedance per datasheet Figure G15–G18.
Can the LTC2486CDE#PBF perform simultaneous 50 Hz and 60 Hz line frequency rejection?
Yes - the LTC2486CDE#PBF supports simultaneous 50 Hz/60 Hz rejection mode via its programmable digital filter. When enabled (via SDI command), the internal FIR filter places nulls at both frequencies, achieving >87 dB normal-mode rejection - confirmed in the Converter Characteristics table (Note 9) and Typical Performance Graph G23.
What is the function of the exposed pad (Pin 15) on the LTC2486CDE#PBF DFN package?
The exposed pad (Pin 15) on the LTC2486CDE#PBF is electrically connected to GND and must be soldered to the PCB ground plane for proper thermal dissipation and electrical performance. Per the Pin Configuration diagram and Note on page 1, failure to solder this pad degrades θJA and may cause thermal instability or increased noise - prototyping with a floating pad is permitted only for evaluation.
LTC2486CDE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 15
- Number of Inputs:
- 2, 4
- 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:
- 14-DFN (4x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2486CDE#PBF FAQ
1.How can I place an order for LTC2486CDE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2486CDE#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 LTC2486CDE#PBF reliable?
The price and inventory of LTC2486CDE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2486CDE#PBF is usually 5 days.
3.What payment methods are accepted for LTC2486CDE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2486CDE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2486CDE#PBF?
LTC2486CDE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2486CDE#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 LTC2486CDE#PBF?
For technical support, including LTC2486CDE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2486CDE#PBF requirements.
6.How does Aetrix verify that LTC2486CDE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2486CDE#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 LTC2486CDE#PBF meets industry standards.
7.What is the process for return or replacement of LTC2486CDE#PBF?
All LTC2486CDE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2486CDE#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 LTC2486CDE#PBF part is unused and in its original packaging.
Return procedure for LTC2486CDE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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