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Analog Devices Inc. LTC2480CDD#TRPBF
- Part No.:
- LTC2480CDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LTC2480CDD#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,264
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Product details
Overview
LTC2480CDD#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit + sign no-latency delta-sigma ADC with patented Easy Drive input current cancellation, programmable gain (1–256), and integrated oscillator. It supports rail-to-rail differential inputs (0V to VCC common mode), 50Hz/60Hz simultaneous line rejection, and operates from 2.7V to 5.5V supply. It directly digitizes high-impedance sensors-e.g., strain gauges or load cells-with 2 ppm INL and <1 µV offset error, enabling precision industrial weighing and instrumentation.
For engineers reviewing the LTC2480CDD#TRPBF datasheet, LTC2480CDD#TRPBF pinout, LTC2480CDD#TRPBF application, or LTC2480CDD#TRPBF equivalent, key selection criteria include its zero-differential-input-current architecture, internal calibration for drift-free operation, 10-lead DFN package compatibility with space-constrained PCBs, and support for both internal and external clocking modes in 0°C to 70°C commercial temperature range.
Technical Context
The LTC2480CDD#TRPBF implements a third-order ∆Σ modulator with automatic offset and full-scale calibration, eliminating latency through single-cycle digital filter settling. Its Easy Drive sampling scheme cancels dynamic input current errors by balancing differential input currents, enabling accurate digitization of signals from sources up to 100 kΩ without external buffering.
It integrates an on-chip trimmed oscillator (307.2 kHz nominal) and supports external clocking via the fO pin for configurable data rates. The 4-wire SPI-compatible interface includes SDI for configuration (gain, rejection mode, speed), SDO for 24-bit output, and dual-mode SCK (input or output depending on power-up state), allowing flexible integration into low-power embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit + sign, no missing codes - guarantees monotonicity and full code coverage across full input range. |
| INL | 2 ppm of VREF (typical) - enables ±0.0002% linearity-critical measurements in precision DVMs and sensor interfaces. |
| Offset Error | 0.5 µV (max, over temp) - eliminates need for system-level nulling in microvolt-level sensor signal chains. |
| Full-Scale Error | ±25 ppm of VREF - ensures calibrated accuracy without per-unit trimming in production test. |
| Input Common Mode Range | 0 V to VCC - allows direct connection to unbuffered ratiometric sensors referenced to same supply. |
| Reference Range | 0.1 V to VCC - supports low-voltage references (e.g., 1.25 V bandgap) while maintaining full resolution. |
| Supply Current | 160 µA (typ, conversion mode); 1 µA (sleep mode) - enables battery-powered portable instrumentation with long duty cycles. |
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 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDI (1) | Serial Data Input | Configures gain, line rejection mode, temperature sensor enable, and 2x speed via 8-bit command on rising SCK edges. |
| VCC (2) | Positive Supply | 2.7 V to 5.5 V analog/digital supply; requires local 1 µF + 0.1 µF bypassing to Pin 8 (GND). |
| 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); Easy Drive cancels differential input current to <1 pA. |
| CS (6) | Active-Low Chip Select | Wakes device from sleep (1 µA) into conversion/data output; CS HIGH holds result in static register indefinitely. |
| SDO (7) | Three-State Serial Output | Outputs 24-bit conversion result on falling SCK edges; Hi-Z when CS = HIGH; status indicator during conversion. |
| GND (8) | Analog/Digital/Reference Ground | Single-point ground connection; must be tied to low-impedance PCB plane; exposed pad (Pin 11) soldered to same plane. |
| SCK (9) | Bidirectional Clock | Auto-configured at power-up: outputs internal clock (38.4 kHz) or accepts external clock (≤4 MHz) for timing control. |
| fO (10) | Frequency Control | GND = internal 307.2 kHz oscillator; driven externally for custom data rates or enhanced noise rejection null placement. |
Key Features
| Feature | Design Value |
|---|---|
| Easy Drive Input Current Cancellation | Eliminates dynamic input current errors from high-impedance sources (e.g., thermistors, bridge sensors), enabling direct connection without op-amp buffers. |
| No-Latency ∆Σ Architecture | Digital filter settles in one conversion cycle - no pipeline delay or group delay uncertainty, critical for real-time closed-loop control. |
| Programmable Line Rejection | Selectable 50 Hz, 60 Hz, or simultaneous 50/60 Hz rejection - removes mains interference in industrial environments without external notch filters. |
| Internal Trimmed Oscillator | 307.2 kHz ±2% (50/60 Hz mode) - eliminates external crystal, reduces BOM count and board area in cost-sensitive designs. |
| Continuous Auto-Calibration | Transparent offset and full-scale calibration during normal operation - maintains DC accuracy over time and temperature without user intervention. |
| Wide Common-Mode Input Range | 0 V to VCC independent of VREF - supports ratiometric sensor interfaces where excitation and reference share supply rails. |
Applications
| Weight Scales | Industrial Process Control |
|---|---|
|
Use Scenario: High-precision platform scales measuring loads from 1 g to 100 kg using 350 Ω strain gauge bridges. IC Role / Device Role / Timing Role: Direct sensor digitizer with 24-bit output, rejecting 50/60 Hz noise from nearby motors or lighting. Use Value: Achieves ≤0.001% linearity and <1 µV offset drift over 0°C–70°C, eliminating factory recalibration and extending maintenance intervals. |
Use Scenario: Analog input module in PLC rack digitizing 4–20 mA transducer outputs and RTD/thermocouple signals. IC Role / Device Role / Timing Role: Precision ADC front-end with programmable gain and internal reference, interfacing to isolated SPI bus. Use Value: Single-chip solution replaces discrete op-amp + reference + ADC stack, reducing component count and improving channel-to-channel matching. |
| Direct Temperature Measurement | Strain Gauge Transducers |
|
Use Scenario: Embedded temperature monitoring in motor drives using internal PTAT sensor or external diode-connected transistor. IC Role / Device Role / Timing Role: Dual-function ADC measuring either external thermistor voltage or internal 390–450 mV PTAT signal. Use Value: Eliminates external temperature sensor ICs; achieves ±0.5°C accuracy over full commercial range with no calibration. |
Use Scenario: Load cell interface in structural health monitoring systems deployed in remote, low-power field nodes. IC Role / Device Role / Timing Role: Low-drift, low-noise ADC with 256× gain supporting µV-level bridge outputs under variable EMI conditions. Use Value: 0.6 µVRMS noise (normal mode) and 2 ppm INL ensure sub-0.01% measurement repeatability over years of field operation. |
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, 2.5 V internal reference, fixed 50/60 Hz rejection, no Easy Drive - requires external buffer for >10 kΩ sources. | Higher resolution but higher power (290 µA active); lacks rail-to-rail input common mode - limited to VREF-centered inputs. | Prefer when 24-bit resolution outweighs input flexibility and power constraints; verify source impedance compatibility. |
| MAX11200EEE+ | 24-bit, ultra-low noise (0.25 µVRMS), no integrated oscillator - requires external clock; no programmable line rejection. | Superior noise performance but adds external crystal and filtering components; no built-in 50/60 Hz rejection logic. | Choose for ultra-low-noise lab-grade instruments where external clocking and filtering are acceptable design trade-offs. |
Compared with ADS124S08IPWR and MAX11200EEE+, the LTC2480CDD#TRPBF delivers unique value in space-constrained, low-power industrial sensors by combining Easy Drive input cancellation, integrated oscillator, and simultaneous 50/60 Hz rejection - all in a 3 mm × 3 mm DFN package with guaranteed 0°C to 70°C operation.
Availability
LTC2480CDD#TRPBF 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 multi-year production cycles.
Supply support for LTC2480CDD#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 LTC2480 belongs to ADI's precision delta-sigma ADC product line, designed specifically for high-accuracy, low-power sensor digitization in harsh industrial environments where input buffering, line noise, and long-term drift are critical concerns.
FAQ
What is the operating temperature range of the LTC2480CDD#TRPBF?
The LTC2480CDD#TRPBF is rated for 0°C to 70°C ambient operation - the "C" grade designation confirms its commercial temperature range. This is validated across all electrical specifications including offset error (≤2.5 µV), full-scale error (±25 ppm), and INL (≤10 ppm), ensuring consistent performance in office, factory-floor, and non-extreme environmental deployments.
Does the LTC2480CDD#TRPBF require external components for basic operation?
The LTC2480CDD#TRPBF operates with minimal external components: only a 1 µF tantalum + 0.1 µF ceramic capacitor on VCC-to-GND (Pin 2 to Pin 8), and optional 1 µF capacitor on IN+ and IN– if driving from high-impedance sources. No external oscillator, reference, or buffer is required - the internal oscillator, programmable gain, and Easy Drive architecture eliminate these dependencies.
How does the Easy Drive technology in the LTC2480CDD#TRPBF improve measurement accuracy?
Easy Drive in the LTC2480CDD#TRPBF cancels differential input current dynamically during sampling, reducing effective input bias current to <1 pA. This enables direct digitization of signals from high-impedance sources (e.g., 100 kΩ thermistors or piezoresistive sensors) without gain/offset errors caused by IR drops - preserving DC accuracy even with mismatched source impedances on IN+ and IN–.
Can the LTC2480CDD#TRPBF reject both 50 Hz and 60 Hz noise simultaneously?
Yes - the LTC2480CDD#TRPBF supports simultaneous 50 Hz and 60 Hz line frequency rejection in a single conversion cycle. This is achieved via its proprietary digital filter architecture synchronized to the internal 280 kHz oscillator (when fO = GND), making it ideal for global deployments where mains frequency varies or EMI contains both harmonics.
What is the function of the fO pin on the LTC2480CDD#TRPBF?
The fO pin on the LTC2480CDD#TRPBF selects the conversion clock source: tying fO to GND activates the internal 307.2 kHz oscillator for standard 50/60 Hz rejection; driving fO with an external clock (10–1000 kHz) enables custom data rates or shifts digital filter nulls to target specific interference frequencies beyond 50/60 Hz.
LTC2480CDD#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 10-DFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2480CDD#TRPBF FAQ
1.How can I place an order for LTC2480CDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2480CDD#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 LTC2480CDD#TRPBF reliable?
The price and inventory of LTC2480CDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2480CDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2480CDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2480CDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2480CDD#TRPBF?
LTC2480CDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2480CDD#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 LTC2480CDD#TRPBF?
For technical support, including LTC2480CDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2480CDD#TRPBF requirements.
6.How does Aetrix verify that LTC2480CDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2480CDD#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 LTC2480CDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2480CDD#TRPBF?
All LTC2480CDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2480CDD#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 LTC2480CDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2480CDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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