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Analog Devices Inc. LTC2480IDD#TRPBF
- Part No.:
- LTC2480IDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2480IDD#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LTC2480IDD#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit plus sign no-latency delta-sigma ADC with patented Easy Drive input current cancellation. It delivers 2 ppm INL, 1 ppm offset error, and programmable gain (1–256) for high-impedance sensor digitization in industrial instrumentation and precision weight scales.
For engineers reviewing the LTC2480IDD#TRPBF datasheet, LTC2480IDD#TRPBF pinout, LTC2480IDD#TRPBF application, or LTC2480IDD#TRPBF equivalent, key selection criteria include rail-to-rail input common-mode range (0 V to VCC), simultaneous 50 Hz/60 Hz line rejection, internal oscillator operation, and DFN-10 package compatibility with space-constrained PCB layouts.
Technical Context
The LTC2480IDD#TRPBF implements a third-order delta-sigma modulator with automatic offset and full-scale calibration, eliminating dynamic input current errors via differential sampling. Its Easy Drive architecture enables direct digitization of rail-to-rail inputs with source impedances up to 100 kΩ while maintaining DC accuracy.
It supports dual-speed operation: normal mode (7.5 SPS, 157 ms conversion time in 50 Hz rejection) and 2× speed mode (15 SPS, 78.7 ms). Line frequency rejection is selectable as 50 Hz, 60 Hz, or simultaneous 50/60 Hz using either internal oscillator (307.2 kHz) or external clock on fO pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit + sign, no missing codes - guarantees monotonicity and unambiguous digital representation across full input range. |
| INL | 2 ppm of VREF (typical) - ensures ≤0.0002% deviation from ideal transfer curve, critical for precision metrology. |
| Offset Error | 0.5 µV (max, over temp) - enables sub-microvolt baseline accuracy without system-level trimming. |
| Full-Scale Error | 25 ppm of VREF - maintains <0.0025% gain accuracy for calibrated sensor interfaces. |
| Input Common-Mode Range | 0 V to VCC - allows direct connection to sensors operating at any level within supply rails, independent of reference voltage. |
| Reference Voltage Range | 0.1 V to VCC - supports low-voltage references (e.g., 100 mV bandgap) or direct tie to VCC for simplified design. |
| Supply Voltage | 2.7 V to 5.5 V - enables operation from single Li-ion, USB, or industrial 3.3 V/5 V rails. |
| Quiescent Current | 1 µA (sleep mode), 160 µA (conversion mode) - extends battery life in portable DVMs and remote sensors. |
Pinout & Package
The LTC2480IDD#TRPBF is housed in a 10-lead (3 mm × 3 mm) plastic DFN package with exposed pad (Pin 11 = GND). This thermally enhanced package supports high-density layouts and efficient heat dissipation in compact instrumentation modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDI (1) | Serial Data Input | Configures gain, line rejection mode, temperature sensor enable, and 2× speed via 8-bit command on rising SCK edge. |
| VCC (2) | Positive Supply | 2.7–5.5 V analog/digital supply; requires local 1 µF + 0.1 µF bypassing to GND for noise immunity. |
| VREF (3) | Reference Input | Accepts 0.1 V to VCC; negative reference is GND (Pin 8); sets full-scale range as ±0.5·VREF/GAIN. |
| IN+ (4), IN– (5) | Differential Analog Inputs | Rail-to-rail common-mode (GND – 0.3 V to VCC + 0.3 V); zero differential input current eliminates source impedance errors. |
| CS (6) | Active-Low Chip Select | Wakes device from sleep (1 µA) into conversion/data output; HIGH = auto-sleep after data transfer. |
| SDO (7) | Three-State Serial Output | Outputs 24-bit conversion result on falling SCK edges; Hi-Z when CS = HIGH. |
| GND (8) | Analog/Digital/Reference Ground | Single-point ground connection; must be tied directly to low-impedance PCB plane. |
| SCK (9) | Bidirectional Clock | Internal mode: outputs 38.4 kHz clock; external mode: accepts ≤4 MHz clock for custom timing control. |
| fO (10) | Frequency Control | GND = internal 307.2 kHz oscillator; driven externally to adjust conversion rate or filter null placement. |
| Exposed Pad (11) | Thermal Ground | Must be soldered to PCB ground plane for thermal performance and EMI reduction; electrically GND. |
Key Features
| Feature | Design Value |
|---|---|
| Easy Drive Input Current Cancellation | Eliminates differential input current (IDIFF = 0), enabling accurate digitization of high-impedance sources like strain gauges without buffer amplifiers. |
| No-Latency Digital Filter | Settles in one conversion cycle - no pipeline delay or group delay uncertainty, essential for real-time closed-loop control. |
| Programmable Line Rejection | Hardware-selectable 50 Hz, 60 Hz, or simultaneous 50/60 Hz rejection - removes mains interference without firmware filtering overhead. |
| On-Chip Temperature Sensor | Integrated PTAT circuit (390–450 mV at 27°C) provides self-monitoring capability for thermal drift compensation in embedded systems. |
| Autocalibration Engine | Continuous transparent offset and full-scale calibration maintains absolute accuracy over temperature and time without user intervention. |
| Wide Common-Mode Input Range | 0 V to VCC independent of VREF - simplifies front-end design by decoupling sensor biasing from reference selection. |
Applications
| Weight Scales | Industrial Process Control |
|---|---|
Use Scenario: High-resolution load cell measurement in platform scales and hopper weighing systems. IC Role / Device Role / Timing Role: Direct digitizer for millivolt-level bridge outputs with 256× gain and 50/60 Hz rejection to suppress ambient AC noise. Use Value: Achieves ≤0.001% full-scale accuracy without external op-amps or notch filters, reducing BOM count and calibration complexity. | Use Scenario: Analog input module for PLCs monitoring pressure, flow, or level transmitters in harsh factory environments. IC Role / Device Role / Timing Role: Precision ADC with rail-to-rail input and wide temperature range (–40°C to 85°C) for reliable field-side signal acquisition. Use Value: Maintains 1 ppm offset drift over temperature, minimizing recalibration intervals and improving long-term process stability. |
| Direct Temperature Measurement | Strain Gauge Transducers |
Use Scenario: Embedded temperature sensing in motor drives, power supplies, and battery management systems. IC Role / Device Role / Timing Role: Dual-role device: digitizes external thermistors/RTDs while also reading its internal PTAT sensor for die temperature tracking. Use Value: Enables real-time thermal derating and fault detection using a single IC, eliminating discrete temperature monitoring components. | Use Scenario: Low-noise signal conditioning for quarter/half/full-bridge strain gauges in structural health monitoring and test equipment. IC Role / Device Role / Timing Role: Delta-sigma ADC with 0.6 µVRMS noise and programmable gain to resolve microstrain-level changes without chopper-stabilized amplifiers. Use Value: Delivers 16-bit effective resolution at 7.5 SPS, supporting high-fidelity static and quasi-static mechanical measurements. |
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 (1–128), but no simultaneous 50/60 Hz rejection; requires external clock for full line rejection. | Better resolution for ultra-low-level signals; lacks hardware-selectable dual-frequency rejection, increasing firmware complexity in noisy AC environments. | Select when >16-bit resolution is mandatory and line rejection can be implemented digitally; avoid if hardware-based 50/60 Hz null is required for deterministic latency. |
| MAX11206ETL+ | 18-bit resolution, 2.5 µV offset, but only 50 Hz or 60 Hz rejection (not simultaneous); no internal oscillator - external crystal required. | Lower power (350 nA sleep) and smaller WLP package; lacks simultaneous dual-frequency rejection and Easy Drive architecture for high-Z sources. | Prefer for ultra-low-power portable instruments where dual-line rejection is unnecessary and board space is constrained; not suitable for high-impedance bridge sensors without buffering. |
Compared with ADS124S08IPWR and MAX11206ETL+, the LTC2480IDD#TRPBF uniquely combines hardware-enabled simultaneous 50/60 Hz rejection, zero-differential-input-current operation, and internal oscillator - making it optimal for cost-sensitive, space-constrained industrial sensors requiring robust AC noise immunity and minimal external components.
Availability
LTC2480IDD#TRPBF is available at Aetrix Electronics and suitable for industrial process control, precision instrumentation, and embedded sensor modules requiring stable component supply across extended temperature ranges.
Supply support for LTC2480IDD#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 LTC2480IDD#TRPBF belongs to ADI's legacy Linear Technology precision delta-sigma ADC product line, engineered specifically for high-accuracy, low-power, direct-sensor-digitization applications in harsh electrical environments.
FAQ
What is the operating temperature range for the LTC2480IDD#TRPBF?
The LTC2480IDD#TRPBF is rated for –40°C to +85°C, matching the "I" grade designation in the ordering matrix. This extended industrial temperature range ensures reliable operation in factory automation, outdoor instrumentation, and motor control applications where ambient conditions exceed commercial limits. The LTC2480IDD#TRPBF maintains specified INL, offset, and full-scale error across this full range.
Does the LTC2480IDD#TRPBF require an external crystal or oscillator?
No, the LTC2480IDD#TRPBF includes a trimmed on-chip oscillator that operates at 307.2 kHz when the fO pin is grounded. This eliminates the need for external crystals, reducing BOM cost and board area. An external clock may be applied to fO only if custom conversion rates or filter null positioning is required - the LTC2480IDD#TRPBF functions fully autonomously with fO = GND.
How does the Easy Drive technology in the LTC2480IDD#TRPBF improve measurement accuracy?
Easy Drive technology in the LTC2480IDD#TRPBF cancels differential input current dynamically during sampling, resulting in IDIFF = 0. This eliminates voltage drops across source impedances - enabling accurate digitization of high-impedance sensors (e.g., 100 kΩ strain gauges) without external buffers. The LTC2480IDD#TRPBF achieves rail-to-rail input operation and maintains 2 ppm INL even with large external impedances.
Can the LTC2480IDD#TRPBF reject both 50 Hz and 60 Hz line noise simultaneously?
Yes, the LTC2480IDD#TRPBF supports simultaneous 50 Hz and 60 Hz line frequency rejection in hardware via a single configuration bit. When enabled, its digital filter places nulls at both frequencies without requiring external computation or dual-pass filtering. This feature is confirmed in the datasheet's "Programmable 50Hz, 60Hz or Simultaneous 50Hz/60Hz Rejection Mode" specification and applies directly to the LTC2480IDD#TRPBF.
What is the purpose of the exposed pad (Pin 11) on the LTC2480IDD#TRPBF DFN package?
The exposed pad (Pin 11) on the LTC2480IDD#TRPBF is electrically connected to GND and serves as the primary thermal path. It must be soldered to a solid PCB ground plane to ensure proper thermal dissipation and EMI suppression. Leaving it floating degrades thermal performance and increases susceptibility to noise - the datasheet explicitly states "MUST BE SOLDERED TO PCB." This requirement applies identically to all DFN variants including the LTC2480IDD#TRPBF.
LTC2480IDD#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 ~ 85°C
- Supplier Device Package:
- 10-DFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2480IDD#TRPBF FAQ
1.How can I place an order for LTC2480IDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2480IDD#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 LTC2480IDD#TRPBF reliable?
The price and inventory of LTC2480IDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2480IDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2480IDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2480IDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2480IDD#TRPBF?
LTC2480IDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2480IDD#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 LTC2480IDD#TRPBF?
For technical support, including LTC2480IDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2480IDD#TRPBF requirements.
6.How does Aetrix verify that LTC2480IDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2480IDD#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 LTC2480IDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2480IDD#TRPBF?
All LTC2480IDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2480IDD#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 LTC2480IDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2480IDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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