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Analog Devices Inc. LTC2486IDE#PBF
- Part No.:
- LTC2486IDE#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC2486IDE#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:587
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Product details
Overview
LTC2486IDE#PBF from Analog Devices (formerly 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, and programmable 50/60 Hz rejection - enabling direct digitization of rail-to-rail, high-impedance sensor signals in industrial process monitoring systems.
For engineers reviewing the LTC2486IDE#PBF datasheet, LTC2486IDE#PBF pinout, LTC2486IDE#PBF application, or LTC2486IDE#PBF equivalent, key selection criteria include its zero-differential-input-current architecture, 14-lead DFN package with GND-exposed pad, 2.7V–5.5V single-supply operation, and support for both internal oscillator and external clock synchronization.
Technical Context
The LTC2486IDE#PBF implements a 3rd-order delta-sigma modulator with decimating FIR filter and auto-calibration, achieving no-latency settling in one conversion cycle even after channel reconfiguration. Its Easy Drive technology cancels differential input current dynamically, eliminating errors from source impedance mismatch.
It supports dual-speed modes: normal (15.7 Hz output rate in 50 Hz rejection mode) and 2× speed (31.4 Hz), with programmable gain (1–256), simultaneous 50/60 Hz line rejection, and internal PTAT temperature sensing (±2°C absolute accuracy, 0.5°C resolution).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full code coverage across full input range. |
| INL | 2 ppm of VREF - enables sub-μV-level precision in calibrated instrumentation-grade measurements. |
| RMS Noise | 600 nV (normal mode) / 850 nV (2× mode) - supports high-resolution weigh scales and strain gauge interfaces. |
| Input Common Mode Range | GND to VCC - allows direct interfacing with sensors operating at rail-to-rail common-mode voltages, independent of reference. |
| Temperature Sensor Accuracy | ±2°C absolute, 0.5°C resolution - provides on-chip thermal compensation without external components. |
| Supply Current | 160–275 µA (conversion), 1 µA (sleep) - enables battery-powered data loggers with multi-year runtime. |
| Line Rejection | 140 dB @ 50/60 Hz - eliminates mains-induced interference in factory-floor analog front ends. |
Pinout & Package
Package: 14-lead (4 mm × 3 mm) plastic DFN with exposed GND pad (Pin 15), rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| fO (Pin 1) | Frequency control input | Selects internal oscillator (GND) or external clock (10–1000 kHz) to configure output data rate and filter nulls. |
| SDI (Pin 2) | Serial data input | Configures gain, channel, speed mode, and line rejection via SPI write before each conversion. |
| SCK (Pin 3) | Bidirectional clock I/O | Output in internal SCK mode; input in external SCK mode - determines timing source for data transfer. |
| CS (Pin 4) | Active-low chip select | Wakes device from sleep (LOW), initiates data I/O, and aborts transfer if raised mid-cycle. |
| SDO (Pin 5) | Three-state serial output | Outputs 24-bit result (MSB first); also serves as conversion status flag (HIGH = in progress). |
| GND (Pin 6) | Analog/digital ground | Common return for all analog and digital circuitry; must be low-impedance connection to PCB plane. |
| COM (Pin 7) | Common negative input | Shared IN– for single-ended channels CH0–CH3; supports bipolar input range relative to COM. |
| CH0–CH3 (Pins 8–11) | Analog input channels | Configurable as 4 single-ended or 2 differential inputs; accept rail-to-rail voltages (GND–0.3V to VCC+0.3V). |
| VCC (Pin 12) | Positive supply | 2.7V–5.5V single supply; requires local 10 µF + 0.1 µF bypassing for stable ADC performance. |
| REF+ / REF– (Pins 13–14) | Differential reference inputs | Set full-scale range (±0.5·VREF/Gain); VREF = REF+–REF– must be ≥0.1V and ≤VCC. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency conversion | Digital filter settles in one cycle after channel or configuration change - eliminates dead time in multiplexed sensor systems. |
| Easy Drive input current cancellation | Eliminates dynamic input current errors - enables accurate measurement from >1 MΩ source impedances without external buffers. |
| Programmable line frequency rejection | Configurable 50 Hz, 60 Hz, or simultaneous 50/60 Hz rejection - critical for EMI immunity in global industrial deployments. |
| Integrated temperature sensor | On-chip PTAT sensor with ±2°C absolute accuracy - supports real-time thermal drift compensation in precision transducers. |
| Flexible power management | 1 µA sleep current and automatic wake-on-CS - extends battery life in portable diagnostic and environmental monitors. |
Applications
| Industrial Process Control | Strain Gauge & Load Cell Interface |
|---|---|
Use Scenario: Monitoring pressure, flow, and level in chemical plant PLC analog input modules. IC Role / Device Role / Timing Role: Primary 16-bit ADC digitizing 4-channel 4–20 mA loop receivers and thermocouple amplifiers. Use Value: 140 dB 50/60 Hz rejection prevents mains coupling into sensitive analog inputs during long cable runs. | Use Scenario: High-accuracy weight measurement in commercial scales and material testing rigs. IC Role / Device Role / Timing Role: Delta-sigma ADC with PGA and Easy Drive driving Wheatstone bridge outputs. Use Value: 600 nV RMS noise and zero-differential-input-current architecture preserve microvolt-level bridge signal integrity. |
| Portable Environmental Data Logger | Thermal Compensation System |
Use Scenario: Battery-powered field unit logging temperature, humidity, and gas concentration over weeks. IC Role / Device Role / Timing Role: Low-power ADC acquiring sensor data at 15.7 Hz with on-demand wake-up via CS. Use Value: 1 µA sleep current and integrated temperature sensor reduce BOM count and extend runtime beyond 2 years. | Use Scenario: Real-time offset correction in high-stability voltage references and precision DACs. IC Role / Device Role / Timing Role: On-die temperature monitor feeding calibration coefficients to host MCU. Use Value: ±2°C absolute accuracy and 0.5°C resolution enable first-order thermal error modeling without external sensors. |
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, 4kSPS max, integrated PGA and burn-out current sources; no on-chip temperature sensor. | Higher resolution suited for weigh scales; lacks integrated thermal sensing for self-compensation. | Choose ADS124S08IPWR when 24-bit resolution and excitation current sources are required, and external temperature sensing is acceptable. |
| MAX11206ETL+ | 24-bit, 10 SPS, ultra-low noise (150 nV), but only 2-channel, no programmable line rejection or integrated temp sensor. | Optimized for ultra-low-noise DC measurements (e.g., thermopiles); lacks multi-channel flexibility and AC line immunity. | Choose MAX11206ETL+ for ultra-low-noise single-point DC measurements where channel count and line rejection are secondary. |
Compared with ADS124S08IPWR and MAX11206ETL+, the LTC2486IDE#PBF uniquely balances 16-bit precision, 4-channel flexibility, built-in 50/60 Hz rejection, and on-chip temperature sensing - making it optimal for cost-sensitive, thermally compensated industrial sensor nodes requiring minimal external components.
Availability
LTC2486IDE#PBF is available at Aetrix Electronics and suitable for industrial process control, portable instrumentation, and thermal compensation systems requiring stable component supply across extended temperature ranges.
Supply support for LTC2486IDE#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 semiconductors.
The LTC2486IDE#PBF belongs to ADI's precision delta-sigma ADC product line, designed specifically for low-power, multi-channel sensor digitization in harsh industrial environments with stringent EMI and thermal stability requirements.
FAQ
What is the operating temperature range of the LTC2486IDE#PBF?
The LTC2486IDE#PBF is specified for operation from –40°C to +85°C, denoted by the "I" grade in the part number. This extended industrial temperature range ensures reliable performance in factory automation, outdoor monitoring, and motor control applications where ambient conditions exceed commercial limits. The device maintains full specification compliance-including INL, noise, and line rejection-across this entire range.
Does the LTC2486IDE#PBF require external anti-aliasing filtering?
No, the LTC2486IDE#PBF does not require external anti-aliasing filters due to its inherent delta-sigma architecture and integrated decimating FIR filter, which provides >100 dB attenuation beyond the first Nyquist zone. Its effective sampling rate and digital filtering eliminate aliasing for input signals below ~100 Hz in normal mode, making it ideal for DC-coupled sensor applications like strain gauges and RTDs without added passive components.
How does the Easy Drive technology in the LTC2486IDE#PBF improve measurement accuracy?
The Easy Drive technology in the LTC2486IDE#PBF actively cancels differential input current during sampling, eliminating voltage errors caused by source impedance imbalance. This allows direct connection to high-impedance sensors (e.g., pH electrodes, thermistors) without external op-amp buffers while preserving DC accuracy-critical for maintaining 2 ppm INL and sub-microvolt offset stability across temperature and gain settings.
Can the LTC2486IDE#PBF measure its own die temperature?
Yes, the LTC2486IDE#PBF integrates a calibrated PTAT temperature sensor with ±2°C absolute accuracy and 0.5°C resolution. By configuring the input mux to select the internal sensor, the device outputs a 24-bit reading directly proportional to junction temperature. This enables real-time thermal drift compensation in precision analog signal chains without adding discrete temperature ICs or NTC networks.
What is the purpose of the fO pin on the LTC2486IDE#PBF?
The fO pin on the LTC2486IDE#PBF controls the conversion clock source: tying it to GND selects the internal 307.2 kHz oscillator for fixed 50/60 Hz rejection modes, while driving it with an external 10–1000 kHz clock enables custom data rates and adaptive filter null placement. This flexibility allows system designers to optimize trade-offs between noise, line rejection, and throughput without changing hardware layout.
LTC2486IDE#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 14-DFN (4x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2486IDE#PBF FAQ
1.How can I place an order for LTC2486IDE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2486IDE#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 LTC2486IDE#PBF reliable?
The price and inventory of LTC2486IDE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2486IDE#PBF is usually 5 days.
3.What payment methods are accepted for LTC2486IDE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2486IDE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2486IDE#PBF?
LTC2486IDE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2486IDE#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 LTC2486IDE#PBF?
For technical support, including LTC2486IDE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2486IDE#PBF requirements.
6.How does Aetrix verify that LTC2486IDE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2486IDE#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 LTC2486IDE#PBF meets industry standards.
7.What is the process for return or replacement of LTC2486IDE#PBF?
All LTC2486IDE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2486IDE#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 LTC2486IDE#PBF part is unused and in its original packaging.
Return procedure for LTC2486IDE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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