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Analog Devices Inc. LTC2482IDD#PBF
- Part No.:
- LTC2482IDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2482IDD#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:287
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Product details
Overview
LTC2482IDD#PBF from Analog Devices (formerly Linear Technology) is a 16-bit delta-sigma analog-to-digital converter with Easy Drive input current cancellation, rail-to-rail input common-mode range (GND to VCC), 600nV RMS noise, and simultaneous 50Hz/60Hz line-frequency rejection. It operates from 2.7V to 5.5V, supports reference voltages as low as 100mV, and delivers 2ppm INL with no missing codes - ideal for high-precision sensor digitization in industrial instrumentation.
For engineers reviewing the LTC2482IDD#PBF datasheet, LTC2482IDD#PBF pinout, LTC2482IDD#PBF application, or LTC2482IDD#PBF equivalent, key selection considerations include its zero differential input current, internal oscillator eliminating external timing components, 10-lead DFN package, and guaranteed performance over –40°C to +85°C.
Technical Context
The LTC2482IDD#PBF implements a third-order delta-sigma modulator with a digital sinc³ filter that settles in a single cycle, delivering true "no latency" conversion. Its patented Easy Drive sampling scheme cancels dynamic differential input current automatically, enabling direct connection of high-impedance sensors without buffer amplifiers.
It supports dual clocking modes: internal oscillator (307.2kHz) for 87dB 50Hz/60Hz rejection, or external fO-driven clock (10–4000kHz) for programmable notch frequency at fEOSC/5120. The 24-bit serial output includes status bits (EOC, sign, over/underrange) and 16-bit plus sign data, compatible with standard 3-wire SPI interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full code coverage across full-scale range. |
| INL | 2 ppm of VREF - ensures ≤0.0002% gain-linearity error in precision measurement systems. |
| Offset Error | ±0.5 μV typical - enables sub-microvolt DC accuracy without system-level trimming. |
| Output Noise | 0.6 μVRMS - independent of VREF, supporting accurate low-level signal digitization even with 100mV references. |
| Input Common-Mode Range | GND to VCC - allows direct interfacing with unbuffered sensors spanning full supply rails. |
| Reference Range | 0.1 V to VCC - permits ultra-low-voltage references for battery-powered or energy-harvesting applications. |
| Supply Current | 160 μA typical in conversion mode, 1 μA in sleep - enables long-term operation in low-power sensing nodes. |
Pinout & Package
The LTC2482IDD#PBF is housed in a 10-lead (3mm × 3mm) plastic DFN package with exposed pad (Pin 11 = GND). All pins are surface-mount compatible and require PCB soldering of the exposed thermal pad for optimal thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Digital/analog ground reference | May be driven high/low for pin compatibility with LTC2480/LTC2484; not required for normal operation. |
| VCC (Pin 2) | Positive supply input | 2.7V–5.5V operation; requires local 1μF tantalum + 0.1μF ceramic bypass to Pin 8 (GND). |
| VREF (Pin 3) | Positive reference input | Accepts 0.1V–VCC; negative reference is GND (Pin 8); sets full-scale range as ±0.5×VREF. |
| IN+ / IN– (Pins 4, 5) | Differential analog inputs | Rail-to-rail common-mode (GND–0.3V to VCC+0.3V); differential range = ±0.5×VREF. |
| CS (Pin 6) | Active-low chip select | Wakes device from sleep; initiates data output; high = automatic sleep mode (1 μA). |
| SDO (Pin 7) | 3-state serial data output | Outputs 24-bit frame (EOC, DMY, SIG, MSB, 16-bit result, 4 zeros); Hi-Z when CS = high. |
| GND (Pin 8) | Shared analog/digital/reference ground | Must connect directly to low-impedance ground plane; primary return path for VREF and analog inputs. |
| SCK (Pin 9) | Bidirectional serial clock | Auto-configures as output (internal SCK mode) or input (external SCK mode) based on power-up state. |
| fO (Pin 10) | Frequency control input | GND = internal 307.2kHz oscillator; external clock (10–4000kHz) enables custom notch frequency at fEOSC/5120. |
Key Features
| Feature | Design Value |
|---|---|
| Easy Drive Input Current Cancellation | Eliminates differential input current errors - enables direct digitization of high-impedance sensors (e.g., strain gauges, thermistors) without external op-amps or RC matching. |
| No Latency ΔΣ Architecture | Digital filter settles in one conversion cycle - avoids pipeline delay and simplifies real-time control loop timing. |
| Simultaneous 50Hz/60Hz Rejection | 87dB rejection at line frequency and harmonics up to 255× - eliminates need for external notch filters or software averaging in AC-coupled environments. |
| Internal Trimmed Oscillator | 307.2kHz ±0.5% over –40°C to +85°C - removes crystals, capacitors, and layout sensitivity while maintaining precise filter null placement. |
| Autocalibration | Continuous transparent offset and full-scale calibration - maintains absolute accuracy over temperature and time without user intervention. |
Applications
| Weight Scales | Industrial Process Control |
|---|---|
Use Scenario: High-resolution load cell readout in platform scales and hopper weighing systems operating in electrically noisy factory environments. IC Role / Device Role / Timing Role: Direct digitizer of mV-level bridge outputs; provides 16-bit resolution with 600nV RMS noise and 87dB line-frequency rejection. Use Value: Eliminates front-end instrumentation amplifiers and external 50/60Hz filtering, reducing BOM count and PCB area by ≥3 components per channel. | Use Scenario: Analog input module for PLCs monitoring pressure, flow, and level transmitters with 4–20mA or mV outputs. IC Role / Device Role / Timing Role: Precision ADC with rail-to-rail input and GND-to-VCC common-mode range - accepts unbuffered sensor signals referenced to field ground. Use Value: Supports direct connection to isolated or non-isolated transmitters without level-shifting circuitry, improving system reliability and reducing calibration drift. |
| Direct Temperature Measurement | Strain Gauge Transducers |
Use Scenario: Cold-junction compensation and thermocouple readout in portable data loggers requiring battery life >1 year. IC Role / Device Role / Timing Role: Low-power ADC with 1 μA sleep current and internal oscillator - enables wake-on-conversion architecture with microcontroller-triggered reads. Use Value: Achieves 0.1°C resolution over –40°C to +125°C using only 100mV reference and no external clock, minimizing quiescent power. | Use Scenario: Wheatstone bridge readout in structural health monitoring sensors deployed on bridges or wind turbine blades. IC Role / Device Role / Timing Role: Delta-sigma ADC with zero differential input current - prevents bridge imbalance errors caused by input bias currents in high-R bridge arms. Use Value: Maintains <2ppm INL even with 10kΩ–1MΩ bridge impedances, avoiding costly matched resistor networks or chopper-stabilized amps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS124S08IPWR | 24-bit resolution, integrated PGA and burn-out current sources; requires external reference; no built-in line-frequency rejection. | Better suited for multi-channel sensor arrays with varying signal gains; lacks simultaneous 50/60Hz rejection without firmware averaging. | Select when higher resolution and programmable gain are needed, and when system-level digital filtering can replace hardware notch rejection. |
| MAX11206ETL+ | 20-bit resolution, 1.4μVRMS noise, internal reference; supports 50/60Hz rejection but requires external crystal for best accuracy. | Optimized for portable medical devices; lower power in active mode but higher sleep current (2.5μA vs 1μA). | Choose for ultra-low-noise medical-grade measurements where internal reference stability outweighs oscillator integration benefits. |
Compared with ADS124S08IPWR and MAX11206ETL+, the LTC2482IDD#PBF uniquely combines 16-bit precision, zero-differential-input-current front-end, internal oscillator-based 87dB line rejection, and 1μA sleep current - making it optimal for cost-sensitive, space-constrained industrial sensor nodes requiring minimal external components and guaranteed AC-line immunity.
Availability
LTC2482IDD#PBF is available at Aetrix Electronics and suitable for weight scales, industrial process controllers, direct temperature measurement systems, and strain gauge transducer interfaces requiring stable component supply across extended temperature ranges.
Supply support for LTC2482IDD#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 LTC2482IDD#PBF belongs to ADI's legacy Linear Technology precision ADC family, designed specifically for direct sensor digitization in harsh, noise-prone environments where rail-to-rail input, low power, and inherent line-frequency immunity are critical.
FAQ
What is the operating temperature range of the LTC2482IDD#PBF?
The LTC2482IDD#PBF is rated for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This extended range is confirmed in the Absolute Maximum Ratings table and Electrical Characteristics section of the official datasheet, and applies across all specified performance parameters including INL, offset error, and noise.
Does the LTC2482IDD#PBF require an external crystal or oscillator?
No, the LTC2482IDD#PBF includes a trimmed internal oscillator operating at 307.2kHz, which enables simultaneous 50Hz/60Hz rejection without external timing components. An external clock may be applied to the fO pin only if custom notch frequencies or synchronization with external systems is required - the internal oscillator remains fully functional and factory-calibrated.
How does the Easy Drive technology in the LTC2482IDD#PBF improve sensor interface accuracy?
The Easy Drive technology in the LTC2482IDD#PBF cancels differential input current dynamically during sampling, reducing effective input current to zero. This eliminates voltage errors across external source impedances - allowing direct connection of high-impedance sensors like thermistors or unbuffered strain gauges without gain/offset errors, while preserving the specified 2ppm INL and 0.5μV offset.
What is the function of the fO pin on the LTC2482IDD#PBF?
The fO pin on the LTC2482IDD#PBF selects the conversion clock source: grounding fO activates the internal 307.2kHz oscillator for standard 50Hz/60Hz rejection; applying an external clock (10–4000kHz) enables programmable notch filtering at fEOSC/5120. The device auto-detects the presence of an external signal and disables the internal oscillator seamlessly.
Can the LTC2482IDD#PBF operate with a 100mV reference voltage?
Yes, the LTC2482IDD#PBF supports reference voltages as low as 100mV while maintaining full 16-bit resolution and specified noise (0.6μVRMS) and linearity (2ppm INL). This capability is explicitly guaranteed in the Electrical Characteristics table under "Reference Voltage Range" and enables ultra-low-power designs powered from coin cells or energy harvesters.
LTC2482IDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 6.8
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- 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:
- 10-DFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2482IDD#PBF FAQ
1.How can I place an order for LTC2482IDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2482IDD#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 LTC2482IDD#PBF reliable?
The price and inventory of LTC2482IDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2482IDD#PBF is usually 5 days.
3.What payment methods are accepted for LTC2482IDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2482IDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2482IDD#PBF?
LTC2482IDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2482IDD#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 LTC2482IDD#PBF?
For technical support, including LTC2482IDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2482IDD#PBF requirements.
6.How does Aetrix verify that LTC2482IDD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2482IDD#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 LTC2482IDD#PBF meets industry standards.
7.What is the process for return or replacement of LTC2482IDD#PBF?
All LTC2482IDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2482IDD#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 LTC2482IDD#PBF part is unused and in its original packaging.
Return procedure for LTC2482IDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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