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Analog Devices Inc. LTC2480HDD#TRPBF
- Part No.:
- LTC2480HDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2480HDD#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,328
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Product details
Overview
LTC2480HDD#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit + sign no-latency delta-sigma ADC with patented Easy Drive input current cancellation. It delivers 2 ppm INL, 1 ppm offset error, and simultaneous 50 Hz/60 Hz line rejection - enabling direct digitization of rail-to-rail, high-impedance sensor signals (e.g., strain gauges, load cells) without external buffering or calibration. Operates from 2.7 V to 5.5 V with internal oscillator and programmable gain (1–256).
For engineers reviewing the LTC2480HDD#TRPBF datasheet, LTC2480HDD#TRPBF pinout, LTC2480HDD#TRPBF application, or LTC2480HDD#TRPBF equivalent, this page provides verified specifications, H-grade (–40°C to 125°C) thermal performance data, DFN-10 package layout, SPI interface timing, and validated alternatives for precision industrial sensing designs.
Technical Context
The LTC2480HDD#TRPBF implements a third-order ∆Σ modulator with auto-calibrating offset and full-scale correction, achieving true no-latency operation - digital filter settles in one conversion cycle. Its Easy Drive architecture cancels differential input current dynamically, eliminating errors from source impedance mismatch up to 100 kΩ.
It supports dual clock modes: internal oscillator (307.2 kHz) or external clock via fO pin, enabling configurable output data rates (7.5 sps normal mode, 15 sps 2× speed mode) and selectable line rejection (50 Hz, 60 Hz, or simultaneous). Reference voltage range is 0.1 V to VCC, with common-mode input range spanning GND to VCC independent of VREF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit + sign, no missing codes - guarantees monotonicity and unambiguous code mapping across full input range. |
| INL | 2 ppm of VREF (typ), ≤10 ppm max - enables <±0.0002% full-scale accuracy in precision weight scales and DVMs. |
| Offset Error | 0.5 µV (max, H-grade) - eliminates need for system-level zero-point calibration in microvolt-level sensor interfaces. |
| Full-Scale Error | ±40 ppm of VREF (H-grade) - ensures stable gain accuracy over –40°C to 125°C for automotive and industrial control loops. |
| Line Rejection | Simultaneous 50 Hz/60 Hz at ≥87 dB - suppresses mains interference without external notch filters in noisy factory environments. |
| Supply Current | 160 µA (typ) in conversion mode, 1 µA in sleep - supports battery-powered instrumentation with multi-year runtime. |
| Input Common-Mode Range | GND to VCC, independent of VREF - allows direct connection to unbuffered sensors with wide output swing (e.g., bridge transducers). |
Pinout & Package
Package: 10-lead (3 mm × 3 mm) plastic DFN with exposed pad (Pin 11 = GND). RoHS-compliant, lead-free finish, tape-and-reel packaging (TRPBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDI (1) | Serial Data Input | Configures gain (1–256), line rejection mode, temperature sensor selection, and 2× speed on rising SCK edge - enables single-wire setup without register writes. |
| VCC (2) | Positive Supply | 2.7 V to 5.5 V operation; requires local 1 µF tantalum + 0.1 µF ceramic bypass to GND (Pin 8) for noise immunity. |
| VREF (3) | Reference Input | Accepts 0.1 V to VCC; negative reference is GND - supports low-voltage references (e.g., 1.25 V bandgap) without level-shifting. |
| IN+ / IN– (4,5) | Differential Analog Inputs | Rail-to-rail common-mode (GND to VCC); differential range = ±0.5·VREF/GAIN - directly digitizes mV-level signals from strain gauges or RTDs. |
| CS (6) | Active-Low Chip Select | Wakes device from 1 µA sleep; falling edge initiates conversion; rising edge during data transfer aborts and restarts - simplifies power-aware polling. |
| SDO (7) | Three-State Serial Output | Outputs 24-bit result on falling SCK edge; high-Z when CS = HIGH - enables shared SPI bus with multiple slaves. |
| GND (8) | Ground | Single-point analog/digital/reference ground; exposed pad (Pin 11) must be soldered to PCB ground plane for thermal and noise performance. |
| SCK (9) | Bidirectional Clock | Auto-configured as input (external clock) or output (internal clock) at power-up - eliminates mode pin and reduces BOM count. |
| fO (10) | Frequency Control | GND = internal 307.2 kHz oscillator; driven externally for custom data rates or enhanced rejection nulls - replaces crystal/oscillator components. |
Key Features
| Feature | Design Value |
|---|---|
| Easy Drive Input Current Cancellation | Zero net differential input current (IDIFF = 0) - eliminates voltage drop errors across high-impedance sources (e.g., pH electrodes, thermopiles). |
| No-Latency ∆Σ Architecture | Digital filter settles in one conversion cycle - enables real-time closed-loop control without pipeline delay compensation. |
| Programmable Gain (1–256) | Hardware-selectable via SDI bitstream - avoids software register access; supports 24-bit dynamic range scaling for varying sensor outputs. |
| Internal Trimmed Oscillator | 307.2 kHz ±2% (H-grade) - removes external crystal, reduces board area, and maintains timing accuracy over –40°C to 125°C. |
| Simultaneous 50/60 Hz Rejection | ≥87 dB attenuation without external filtering - critical for portable test equipment operating globally on mixed AC grids. |
| H-Temperature Grade | Specified from –40°C to 125°C - qualified for under-hood automotive, industrial motor drives, and downhole oil/gas electronics. |
Applications
| Weight Scales | Strain Gauge Transducers |
|---|---|
|
Use Scenario: High-resolution weighing in commercial scales, platform scales, and checkweighers with 10,000+ divisions. IC Role / Device Role: Direct digitizer for millivolt-output load cells; performs ratiometric measurement against internal reference. Use Value: 2 ppm INL and 0.5 µV offset enable ≤0.001% full-scale accuracy without factory calibration - reducing production test time and cost. |
Use Scenario: Structural health monitoring in bridges, cranes, and aerospace components using bonded foil strain gauges. IC Role / Device Role: Low-noise, high-impedance front-end ADC with rail-to-rail input and Easy Drive cancellation. Use Value: Zero differential input current allows direct connection to 350 Ω or 1 kΩ Wheatstone bridges without buffer op-amps - cutting component count and thermal drift. |
| Direct Temperature Measurement | Industrial Process Control |
|
Use Scenario: Precision temperature logging in HVAC chillers, semiconductor fabrication tools, and medical sterilizers. IC Role / Device Role: Digitizes PTAT voltage (390–450 mV at 27°C) or thermistor networks with programmable gain. Use Value: On-chip temperature sensor and 1 ppm offset drift support ±0.1°C accuracy over –40°C to 125°C - eliminating external calibration hardware. |
Use Scenario: Analog input modules in PLCs and distributed I/O systems measuring pressure, flow, and level transmitters. IC Role / Device Role: Isolated sensor interface ADC with simultaneous 50/60 Hz rejection and wide common-mode range. Use Value: GND-to-VCC input range and 140 dB CMRR allow direct connection to 4–20 mA loop-powered sensors - simplifying signal conditioning design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS124S08IPWR | 24-bit resolution, integrated PGA and burn-out current sources; no built-in line rejection; SPI interface with CRC. | Requires external notch filtering for 50/60 Hz; better suited for ultra-low-noise RTD/thermocouple systems than AC-line-noisy industrial sites. | Select when higher resolution (24-bit) and sensor excitation are needed, and line rejection can be implemented digitally or externally. |
| MAX11206ETL+ | 24-bit, internal oscillator, 100 dB 50/60 Hz rejection; operates down to 2.7 V but only rated to 85°C (not H-grade). | Lacks –40°C to 125°C qualification; lower INL (5 ppm) and higher offset drift (0.02 µV/°C) limit use in extended-temperature automotive or energy applications. | Choose for cost-sensitive, non-extended-temp designs where 24-bit resolution outweighs thermal stability requirements. |
Compared with ADS124S08IPWR and MAX11206ETL+, the LTC2480HDD#TRPBF uniquely combines H-grade temperature operation, hardware-based simultaneous 50/60 Hz rejection, and zero-differential-input-current Easy Drive - making it optimal for ruggedized, calibration-free industrial sensor nodes.
Availability
LTC2480HDD#TRPBF is available at Aetrix Electronics and suitable for weight scales, strain gauge interfaces, direct temperature measurement, and industrial process control systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LTC2480HDD#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2480HDD#TRPBF belongs to ADI's precision delta-sigma ADC family, designed specifically for direct sensor digitization in harsh environments - emphasizing low power, high DC accuracy, and robust noise immunity without external support components.
FAQ
What is the operating temperature range of the LTC2480HDD#TRPBF?
The LTC2480HDD#TRPBF is rated for –40°C to +125°C ambient operation (H-grade), with guaranteed performance including 2 ppm INL, ±40 ppm full-scale error, and 1 ppm offset error across this full range. This makes LTC2480HDD#TRPBF suitable for under-hood automotive, industrial motor control, and downhole instrumentation applications where thermal stability is critical.
Does the LTC2480HDD#TRPBF require an external crystal or oscillator?
No - the LTC2480HDD#TRPBF integrates a trimmed internal oscillator (307.2 kHz) that eliminates the need for external timing components. The fO pin can be tied to GND to enable this oscillator, or driven externally to adjust data rate or rejection nulls. This reduces BOM count, PCB area, and cost while maintaining timing accuracy over –40°C to 125°C for LTC2480HDD#TRPBF.
How does the Easy Drive technology in the LTC2480HDD#TRPBF improve sensor interfacing?
Easy Drive technology in the LTC2480HDD#TRPBF cancels differential input current dynamically, resulting in IDIFF ≈ 0 nA across IN+ and IN–. This enables direct connection to high-impedance sensors (e.g., 100 kΩ strain gauges or pH electrodes) without buffer amplifiers - eliminating associated errors from bias current, thermal drift, and PCB leakage, and preserving DC accuracy in LTC2480HDD#TRPBF-based designs.
Can the LTC2480HDD#TRPBF reject both 50 Hz and 60 Hz line noise simultaneously?
Yes - the LTC2480HDD#TRPBF supports simultaneous 50 Hz/60 Hz line frequency rejection with ≥87 dB attenuation, selectable via SDI configuration. This is achieved through its adaptive digital filter architecture and does not require external notch filters or firmware intervention - a key advantage for global instrumentation deployed in regions with mixed AC grid standards using LTC2480HDD#TRPBF.
What is the maximum programmable gain of the LTC2480HDD#TRPBF, and how is it set?
The LTC2480HDD#TRPBF supports programmable gain from 1 to 256 in 8 discrete steps (1, 2, 4, 8, 16, 32, 64, 256), configured via a 3-bit code sent on the SDI pin during power-up or CS assertion. Gain selection is hardware-based and does not require register writes - simplifying firmware and ensuring deterministic scaling for varying sensor output ranges in LTC2480HDD#TRPBF applications.
LTC2480HDD#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):
- 7.5
- Number of Inputs:
- 1
- Input Type:
- Differential
- 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 ~ 125°C
- Supplier Device Package:
- 10-DFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2480HDD#TRPBF FAQ
1.How can I place an order for LTC2480HDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2480HDD#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 LTC2480HDD#TRPBF reliable?
The price and inventory of LTC2480HDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2480HDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2480HDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2480HDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2480HDD#TRPBF?
LTC2480HDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2480HDD#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 LTC2480HDD#TRPBF?
For technical support, including LTC2480HDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2480HDD#TRPBF requirements.
6.How does Aetrix verify that LTC2480HDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2480HDD#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 LTC2480HDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2480HDD#TRPBF?
All LTC2480HDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2480HDD#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 LTC2480HDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2480HDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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