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Analog Devices Inc. LTC2484IDD#TRPBF
- Part No.:
- LTC2484IDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2484IDD#TRPBF.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,650
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Product details
Overview
LTC2484IDD#TRPBF from Analog Devices (formerly Linear Technology) is a 24-bit no-latency delta-sigma analog-to-digital converter with patented Easy Drive input current cancellation, 600nVRMS noise, ±2ppm INL, and rail-to-rail input range (0V to VCC). It operates from 2.7V to 5.5V, supports programmable 50Hz/60Hz line rejection, and integrates an on-chip trimmed oscillator - enabling direct digitization of high-impedance sensors in precision industrial instrumentation.
For engineers reviewing the LTC2484IDD#TRPBF datasheet, LTC2484IDD#TRPBF pinout, LTC2484IDD#TRPBF application, or LTC2484IDD#TRPBF equivalent, key selection criteria include differential input current cancellation capability, simultaneous 50Hz/60Hz rejection mode, internal oscillator operation at 307.2kHz, 10-lead DFN package thermal performance, and guaranteed no missing codes over full temperature range.
Technical Context
The LTC2484IDD#TRPBF implements a third-order delta-sigma modulator with automatic offset and full-scale calibration, achieving true 24-bit resolution without latency-digital filter settles in one cycle. Its Easy Drive architecture cancels differential input current via passive sampling, eliminating dynamic errors from source impedance mismatch.
It supports three line-rejection configurations (50Hz, 60Hz, or simultaneous 50Hz/60Hz) and a 2× speed mode (15Hz output rate using internal oscillator). The device uses a 4-wire SPI interface with configurable SCK direction (input for external clock, output for internal clock), and features an on-chip temperature sensor accessible via SDI command.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit with no missing codes - guarantees monotonicity and full code coverage across –FS to +FS input range |
| INL | ±2ppm of VREF - enables sub-1µV linearity error in 5V reference systems |
| Output Noise | 600nVRMS - supports 20.5+ ENOB at 7.5SPS with 5V reference |
| Offset Error | ±0.5µV typical - eliminates need for system-level zero-point calibration in µV-level measurements |
| Input Common Mode Range | 0V to VCC - allows direct connection of unbuffered sensors spanning ground to supply |
| Line Rejection | Simultaneous 50Hz/60Hz at >87dB - suppresses dual-frequency mains interference without external filtering |
| Supply Current | 160µA typical in conversion mode - enables battery-powered precision measurement for >1 year on coin cell |
Pinout & Package
Package: 10-lead (3mm × 3mm) plastic DFN with exposed pad (Pin 11 = GND). Thermal resistance θJA = 43°C/W; exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDI (Pin 1) | Serial Data Input | Latches 8-bit configuration word on SCK rising edge to select line rejection mode, temperature sensor, or 2× speed |
| VCC (Pin 2) | Positive Supply | 2.7V–5.5V operation; requires local 1µF tantalum + 0.1µF ceramic bypass to GND (Pin 8) |
| VREF (Pin 3) | 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 range (GND–0.3V to VCC+0.3V); Easy Drive cancels differential input current |
| CS (Pin 6) | Active-Low Chip Select | Wakes ADC from sleep; LOW initiates data output; HIGH returns to 1µA sleep mode |
| SDO (Pin 7) | Three-State Serial Output | Drives conversion result MSB-first on SCK falling edge; Hi-Z when CS = HIGH |
| GND (Pin 8) | Ground | Single shared node for analog, digital, and reference grounds; connects to exposed pad |
| SCK (Pin 9) | Bidirectional Clock | Outputs internal clock (38.4kHz) or accepts external clock (up to 4MHz); mode set at power-up or CS fall |
| fO (Pin 10) | Frequency Control | GND selects internal 307.2kHz oscillator; external clock overrides for custom data rates or filter null tuning |
Key Features
| Feature | Design Value |
|---|---|
| Easy Drive Input Current Cancellation | Eliminates differential input current errors without buffers, enabling direct interface to >1MΩ sensor sources while preserving DC accuracy |
| No-Latency Digital Filter | Settles in single conversion cycle - avoids group delay and phase distortion in closed-loop control feedback paths |
| Programmable Line Frequency Rejection | Configurable 50Hz, 60Hz, or simultaneous dual-frequency rejection via SDI command - no external notch filters required |
| On-Chip Trimmed Oscillator | 307.2kHz internal clock eliminates crystal, capacitors, and layout sensitivity - reduces BOM count and board area |
| Auto-Calibration Architecture | Continuous transparent offset and full-scale calibration maintains absolute accuracy over temperature and time without user intervention |
Applications
| Weight Scales | Strain Gauge Transducers |
|---|---|
Use Scenario: High-resolution load cell readout in commercial and industrial weighing platforms requiring legal-for-trade accuracy. IC Role / Device Role / Timing Role: Direct digitizer of mV-level bridge outputs with integrated line rejection to suppress AC mains coupling in factory environments. Use Value: 24-bit resolution and ±2ppm INL enable 1:1,000,000 dynamic range - supporting Class III/III LFT compliance without external amplification. | Use Scenario: Precision force and pressure sensing in hydraulic systems, structural health monitoring, and test equipment. IC Role / Device Role / Timing Role: Low-noise ADC front end accepting unbuffered Wheatstone bridge signals with rail-to-rail common-mode voltage tolerance. Use Value: 600nVRMS noise and Easy Drive allow direct connection to 350Ω strain gauges - eliminating op-amp drift and gain error sources. |
| Direct Temperature Measurement | Industrial Process Control |
Use Scenario: Cold-junction compensation and thermocouple readout in HVAC, furnace controllers, and environmental chambers. IC Role / Device Role / Timing Role: Simultaneous digitization of thermocouple voltage and on-chip temperature sensor (PTAT signal) for real-time CJC. Use Value: Integrated PTAT output (390–450mV at 27°C) and 0.5µV offset error reduce system component count and improve long-term thermal stability. | Use Scenario: Analog input modules in PLCs and distributed I/O systems measuring 4–20mA loops, RTDs, and thermistors. IC Role / Device Role / Timing Role: Isolated analog front-end ADC with programmable line rejection for noisy plant-floor environments. Use Value: Simultaneous 50Hz/60Hz rejection >87dB ensures stable readings despite variable-frequency drive harmonics and switching power supply noise. |
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, 4kSPS max, integrated PGA and burn-out current sources; no Easy Drive; requires external reference | Optimized for RTD/thermistor arrays with excitation control; less suitable for ultra-high-Z sensors | Select when multi-channel sensor scanning and programmable gain are required over ultra-low input current cancellation |
| MAX11206ETL+ | 24-bit, 10SPS, 550nVRMS noise, no integrated oscillator, external clock only; ±1.5ppm INL | Lacks simultaneous 50/60Hz rejection and on-chip temperature sensor; requires external timing components | Select when lowest possible noise is critical and external clocking infrastructure already exists |
Compared with ADS124S08IPWR and MAX11206ETL+, the LTC2484IDD#TRPBF uniquely delivers differential input current cancellation, integrated oscillator, and simultaneous dual-line rejection in a 3mm × 3mm DFN - making it optimal for space-constrained, ultra-high-impedance sensor interfaces where board-level simplicity and mains immunity are mandatory.
Availability
LTC2484IDD#TRPBF is available at Aetrix Electronics and suitable for industrial process control, precision instrumentation, and embedded sensor systems requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for LTC2484IDD#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 LTC2484IDD#TRPBF belongs to ADI's legacy Linear Technology precision delta-sigma ADC product line, engineered specifically for direct sensor digitization in low-power, high-accuracy measurement systems where input buffering and external timing components must be eliminated.
FAQ
What is the operating temperature range of the LTC2484IDD#TRPBF?
The LTC2484IDD#TRPBF is rated for –40°C to +85°C operation, matching the "I" grade designation in its part number. This extended industrial temperature range ensures reliable performance in demanding environments such as factory automation, outdoor instrumentation, and motor control cabinets where ambient temperatures exceed commercial limits.
Does the LTC2484IDD#TRPBF require an external crystal or oscillator?
No, the LTC2484IDD#TRPBF does not require an external crystal or oscillator. It integrates a trimmed on-chip oscillator operating at 307.2kHz when the fO pin is grounded. This eliminates external timing components, reduces PCB area, and improves reliability - though an external clock may be applied to fO for custom data rates or filter tuning.
How does Easy Drive technology benefit sensor interfacing in the LTC2484IDD#TRPBF?
Easy Drive technology in the LTC2484IDD#TRPBF automatically cancels differential input current through a proprietary passive sampling network. This enables direct connection of high-impedance sensors (e.g., load cells, thermocouples) without external op-amps, preserving DC accuracy and eliminating errors caused by source impedance mismatch - a critical advantage for µV-level measurements.
Can the LTC2484IDD#TRPBF reject both 50Hz and 60Hz line noise simultaneously?
Yes, the LTC2484IDD#TRPBF supports simultaneous 50Hz and 60Hz line frequency rejection in a single conversion cycle, achieving >87dB attenuation. This mode is selected via the SDI configuration word and is especially valuable in global instrumentation deployed across regions with differing mains frequencies or in facilities with mixed 50/60Hz equipment.
What is the significance of the "#TRPBF" suffix in LTC2484IDD#TRPBF?
The "#TRPBF" suffix indicates that the LTC2484IDD#TRPBF is supplied in tape-and-reel packaging (TR), lead-free finish (PBF), and meets RoHS compliance. It specifies the standard production packaging format used for automated SMT assembly, distinguishing it from cut-tape (#PBF) or tray (#PBF) variants.
LTC2484IDD#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:
- 24
- 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 ~ 85°C
- Supplier Device Package:
- 10-DFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2484IDD#TRPBF FAQ
1.How can I place an order for LTC2484IDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2484IDD#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 LTC2484IDD#TRPBF reliable?
The price and inventory of LTC2484IDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2484IDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2484IDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2484IDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2484IDD#TRPBF?
LTC2484IDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2484IDD#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 LTC2484IDD#TRPBF?
For technical support, including LTC2484IDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2484IDD#TRPBF requirements.
6.How does Aetrix verify that LTC2484IDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2484IDD#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 LTC2484IDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2484IDD#TRPBF?
All LTC2484IDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2484IDD#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 LTC2484IDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2484IDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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