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Analog Devices Inc. LTC2482IDD#TRPBF
- Part No.:
- LTC2482IDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2482IDD#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,847
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Product details
Overview
LTC2482IDD#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit + sign delta-sigma ADC 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 single supply, supports reference voltages as low as 100mV, and targets high-impedance sensor digitization in industrial instrumentation and precision weighing systems.
For engineers reviewing the LTC2482IDD#TRPBF datasheet, LTC2482IDD#TRPBF pinout, LTC2482IDD#TRPBF application, or LTC2482IDD#TRPBF equivalent, key selection criteria include differential input current cancellation capability, no-latency digital filter settling, ±2ppm INL, 1ppm offset error, and compatibility with low-voltage references down to 100mV in harsh EMI environments.
Technical Context
The LTC2482IDD#TRPBF implements a third-order delta-sigma modulator with automatic differential input current cancellation via patented Easy Drive sampling, enabling direct interface to high-impedance sensors without external amplifiers. Its on-chip trimmed oscillator runs at 307.2kHz for internal clocking and delivers 87dB simultaneous 50Hz/60Hz rejection without external components.
It features transparent continuous offset and full-scale autocalibration, supports both internal and external SCK modes, and provides 24-bit serial output (3 status + 17 data + 4 zero bits) over a 3-wire SPI-compatible interface. Input common-mode rejection exceeds 140dB DC and at 50/60Hz, while reference common-mode rejection reaches 140dB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit + sign, no missing codes - guarantees monotonicity and full code coverage across full differential input range. |
| INL | ±2 ppm of VREF - enables sub-μV-level linearity for precision weight scales and strain gauge measurements. |
| Offset Error | ±0.5 μV typical - eliminates need for system-level offset trimming in low-drift instrumentation designs. |
| Noise | 0.6 μVRMS - independent of VREF, allowing accurate digitization of mV-level signals even with 100mV reference. |
| Supply Range | 2.7V to 5.5V - supports battery-powered portable meters and wide-input industrial supplies. |
| Common-Mode Range | GND to VCC - permits direct connection of unbuffered sensors with rail-to-rail output swing. |
| 50/60Hz Rejection | 87 dB simultaneous - suppresses mains interference without external notch filters or synchronous sampling control. |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN with exposed pad (Pin 11 = GND). Pin 1 is functional GND but may be driven for pin compatibility with LTC2480/LTC2484.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Analog/digital ground reference | Shared ground node; may be driven high/low to maintain pin compatibility with LTC2480/LTC2484 family. |
| VCC (Pin 2) | Positive supply input | 2.7V–5.5V single supply; requires local 1μF tantalum + 0.1μF ceramic bypass to Pin 8 GND. |
| VREF (Pin 3) | Positive reference input | Accepts 0.1V to 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 to +0.5×VREF. |
| CS (Pin 6) | Active-low chip select | Wakes device from sleep; low-to-high transition during data output aborts transfer and starts new conversion. |
| SDO (Pin 7) | 3-state serial data output | Outputs 24-bit frame (EOC/DMY/SIG/MSB/data/zero bits); high-Z when CS = high. |
| GND (Pin 8) | Primary ground plane connection | Shared analog/digital/reference ground; must connect directly to PCB ground plane with minimal impedance. |
| SCK (Pin 9) | Bidirectional serial clock | Output in internal SCK mode (38.4kHz), input in external SCK mode; auto-detected at power-up or CS edge. |
| fO (Pin 10) | Frequency control input | Drives internal oscillator (fO = GND) or accepts external clock (10–4000kHz) for custom rejection nulls. |
Key Features
| Feature | Design Value |
|---|---|
| Easy Drive input current cancellation | Zero differential input current enables direct digitization of high-impedance sensors (e.g., load cells, thermistors) without buffer amplifiers or matched RC networks. |
| No-latency digital filter | Settles in one conversion cycle - eliminates group delay uncertainty critical for real-time closed-loop control and fast response metering. |
| Internal trimmed oscillator | 307.2kHz ±0.5% - removes need for external crystal/capacitor, reduces BOM count and board area in space-constrained designs. |
| Simultaneous 50Hz/60Hz rejection | 87dB attenuation at both frequencies and harmonics up to 255× - simplifies compliance with IEC 61000-4-8 in global industrial deployments. |
| Continuous autocalibration | Transparent offset and full-scale correction during operation - maintains absolute accuracy over temperature and time without user intervention. |
Applications
| Weight Scales | Strain Gauge Transducers |
|---|---|
Use Scenario: High-precision platform scales and benchtop analytical balances measuring loads from 1g to 100kg with <10mg resolution. IC Role / Device Role / Timing Role: Direct sensor digitizer converting mV-level bridge outputs with 16-bit resolution and sub-μV offset stability. Use Value: Eliminates instrumentation amplifier stage and associated drift/noise, reducing total error budget by >50% versus buffered architectures. | Use Scenario: Structural health monitoring in bridges and aircraft using bonded foil or MEMS strain gauges under thermal cycling. IC Role / Device Role / Timing Role: Low-drift, high-common-mode-rejection ADC capturing microstrain-induced voltage shifts amid 120dB EMI. Use Value: 140dB CMRR and 87dB simultaneous 50/60Hz rejection enable stable readings without shielded cabling or active filtering. |
| Industrial Process Control | DVMs and Meters |
Use Scenario: Loop-powered 4–20mA transmitters and PLC analog input modules requiring long-term stability in 0°C to 85°C ambient. IC Role / Device Role / Timing Role: Precision front-end ADC with continuous autocalibration maintaining <15ppm total unadjusted error over temperature. Use Value: Reduces annual calibration frequency from quarterly to biannual in certified process instrumentation per ISA-88 requirements. | Use Scenario: Portable handheld digital multimeters and bench DMMs needing 100,000-count resolution with true RMS capability. IC Role / Device Role / Timing Role: Core measurement engine digitizing AC/DC voltage, current, and resistance with 0.6μVRMS noise floor. Use Value: 600nV RMS noise independent of VREF allows use of low-noise 2.5V reference to maximize SNR without sacrificing dynamic range. |
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 burnout current sources; no Easy Drive; requires external reference; higher supply current (350μA vs 160μA). | Targeted at RTD/thermocouple sensing with programmable gain; less suitable for direct high-Z sensor interfaces without PGA configuration. | Select when higher resolution and integrated sensor excitation are required; avoid if minimizing external components and eliminating input current errors is primary. |
| LTC2440CG#PBF | 24-bit resolution, 120dB 50/60Hz rejection, no Easy Drive, larger 20-pin SSOP package, higher noise (1.5μVRMS), requires external oscillator. | Designed for ultra-low-noise laboratory-grade instruments; lacks rail-to-rail input and differential current cancellation. | Choose for maximum resolution and rejection where board space and input buffering are acceptable; not recommended for compact, high-Z sensor nodes. |
Compared with ADS124S08IPWR and LTC2440CG#PBF, the LTC2482IDD#TRPBF uniquely combines 16-bit precision with zero differential input current, rail-to-rail common-mode range, and integrated oscillator in a 3mm×3mm DFN-making it optimal for space-constrained, high-impedance sensor applications demanding simplicity and robustness over raw bit count.
Availability
LTC2482IDD#TRPBF is available at Aetrix Electronics and suitable for industrial process control, precision weighing systems, and portable test equipment requiring stable component supply across extended temperature ranges (–40°C to +85°C) and long production lifecycles.
Supply support for LTC2482IDD#TRPBF 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#TRPBF belongs to ADI's legacy Linear Technology precision ADC product line, engineered specifically for direct digitization of high-impedance, low-level sensor signals in noisy industrial environments with minimal external components.
FAQ
What is the operating temperature range for the LTC2482IDD#TRPBF?
The LTC2482IDD#TRPBF is rated for operation from –40°C to +85°C, making it suitable for industrial environments where ambient temperatures exceed commercial-grade limits. This grade is confirmed by the "I" suffix in the part number and applies across all electrical specifications unless otherwise noted in the datasheet's Electrical Characteristics table.
Does the LTC2482IDD#TRPBF require an external reference voltage?
No-the LTC2482IDD#TRPBF accepts an external reference between 0.1V and VCC, but it does not require one: VREF can be tied directly to VCC. When used with a 100mV reference, it maintains full 16-bit resolution and 600nV RMS noise, enabling ultra-low-voltage sensor interfaces without performance degradation.
How does Easy Drive technology benefit sensor interfacing in the LTC2482IDD#TRPBF?
Easy Drive technology in the LTC2482IDD#TRPBF cancels differential input current dynamically, resulting in near-zero net current into IN+ and IN– pins. This allows direct connection of high-impedance sensors (e.g., 10MΩ thermistors or millivolt-output load cells) without external op-amps or matched resistor networks-reducing error sources, board area, and power consumption.
Can the LTC2482IDD#TRPBF reject both 50Hz and 60Hz noise simultaneously?
Yes-the LTC2482IDD#TRPBF achieves >87dB simultaneous rejection of both 50Hz and 60Hz line frequencies and their harmonics up to the 255th order when using its internal 307.2kHz oscillator. This is enabled by its proprietary digital filter architecture and requires no configuration or external components.
What is the function of the fO pin on the LTC2482IDD#TRPBF?
The fO pin on the LTC2482IDD#TRPBF selects the conversion clock source: grounding fO enables the internal 307.2kHz oscillator; applying an external clock (10–4000kHz) overrides the internal oscillator to customize the rejection null (e.g., fEOSC/5120) for specialized EMI environments or synchronization with system clocks.
LTC2482IDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC2482IDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2482IDD#TRPBF 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#TRPBF reliable?
The price and inventory of LTC2482IDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2482IDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2482IDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2482IDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2482IDD#TRPBF?
LTC2482IDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2482IDD#TRPBF 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#TRPBF?
For technical support, including LTC2482IDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2482IDD#TRPBF requirements.
6.How does Aetrix verify that LTC2482IDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2482IDD#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2482IDD#TRPBF?
All LTC2482IDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2482IDD#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LTC2482IDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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