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Analog Devices Inc. LTC2480CMS#PBF
- Part No.:
- LTC2480CMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2480CMS#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:150
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Product details
Overview
LTC2480CMS#PBF 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 features programmable gain (1–256), simultaneous 50Hz/60Hz line rejection, internal oscillator, rail-to-rail input range (0V to VCC), and ±2 ppm INL - enabling direct digitization of high-impedance sensors like strain gauges and load cells in industrial instrumentation.
For engineers reviewing the LTC2480CMS#PBF datasheet, LTC2480CMS#PBF pinout, LTC2480CMS#PBF application, or LTC2480CMS#PBF equivalent, key selection criteria include its zero differential input current, 1 µV offset error, 2.7V–5.5V single-supply operation, 10-lead MSOP package, and support for both internal and external clocking modes.
Technical Context
The LTC2480CMS#PBF implements a third-order delta-sigma modulator with automatic on-chip offset and full-scale calibration, eliminating latency in digital filter settling. Its Easy Drive architecture cancels dynamic input current errors by balancing differential input currents, enabling accurate measurements from sources up to 100 kΩ without external buffering.
It supports three line-rejection modes (50 Hz, 60 Hz, or simultaneous 50/60 Hz) via configuration bits on SDI, and offers a 2× speed mode reducing conversion time to 78.7 ms (50 Hz mode). The internal oscillator runs at 307.2 kHz, and the reference voltage range is 0.1 V to VCC - independent of common-mode input voltage.
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 (0.25 LSB max) - ensures high-precision measurement linearity for weight scales and DVMs. |
| Offset Error | ±0.5 µV typical - enables sub-microvolt DC accuracy critical for low-level sensor signals. |
| Full-Scale Error | ±25 ppm of VREF - maintains calibrated accuracy across temperature and supply variations. |
| Input Common-Mode Range | 0 V to VCC - allows direct interfacing with unbuffered ratiometric sensors without level-shifting. |
| Line Rejection | 140 dB at 50/60 Hz - suppresses mains interference in industrial environments without external notch filters. |
| Supply Voltage | 2.7 V to 5.5 V - supports battery-powered and wide-input industrial rails. |
Pinout & Package
Package: 10-Lead Plastic MSOP (3.0 mm × 4.9 mm), exposed pad grounded. Compatible with standard surface-mount reflow profiles and manual prototyping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDI (Pin 1) | Serial Data Input | Configures gain, line rejection mode, temperature sensor enable, and 2× speed via rising-edge-shifted command bits. |
| VCC (Pin 2) | Positive Supply | Single 2.7–5.5 V supply; requires local 1 µF + 0.1 µF bypassing to GND for noise immunity. |
| VREF (Pin 3) | Reference Input | Accepts 0.1 V to VCC; reference common-mode rejection ≥120 dB ensures stable scaling. |
| IN+ / IN– (Pins 4, 5) | Differential Analog Inputs | Rail-to-rail input range (GND–0.3 V to VCC+0.3 V); zero differential input current enables >100 kΩ source impedance. |
| CS (Pin 6) | Active-Low Chip Select | Wakes device from sleep (1 µA) into conversion/data output; falling edge initiates new conversion cycle. |
| SDO (Pin 7) | Three-State Serial Output | Outputs 24-bit conversion result on falling SCK edge; high-Z when CS = HIGH to prevent bus contention. |
| GND (Pin 8) | Ground | Unified analog/digital/reference ground; must connect directly to low-impedance PCB plane. |
| SCK (Pin 9) | Bidirectional Clock | Auto-configured as input (external clock) or output (internal 38.4 kHz SCK) based on power-up state. |
| fO (Pin 10) | Frequency Control | GND = internal 307.2 kHz oscillator; driven externally to adjust data rate or rejection null frequency. |
Key Features
| Feature | Design Value |
|---|---|
| Easy Drive Input Current Cancellation | Eliminates dynamic input current errors - enables direct connection to high-impedance bridges and thermistors without op-amp buffers. |
| No-Latency Delta-Sigma Architecture | Digital filter settles in one conversion cycle - delivers first valid result immediately after CS assertion, no pipeline delay. |
| Programmable Gain (1–256) | Eight discrete gain steps configured via SDI - optimizes dynamic range for microvolt-level sensor outputs or full-scale industrial signals. |
| Simultaneous 50 Hz/60 Hz Rejection | 87 dB rejection at dual frequencies - removes global AC line interference without requiring region-specific hardware changes. |
| Internal Trimmed Oscillator | 307.2 kHz ±2% - eliminates external crystal, reduces BOM count, and maintains timing accuracy over –40°C to 125°C. |
Applications
| Weight Scales | Industrial Process Control |
|---|---|
Use Scenario: High-resolution weighing of industrial loads using strain gauge bridges with 1–5 mV/V sensitivity. IC Role / Device Role / Timing Role: Direct sensor digitizer with 0.5 µV offset and 2 ppm INL, rejecting 50/60 Hz noise from nearby motors and drives. Use Value: Eliminates need for external instrumentation amplifiers and analog filtering, reducing system cost and board space while maintaining NTEP-class accuracy. | Use Scenario: Monitoring pressure, flow, or level transmitters in factory automation systems with long sensor cables. IC Role / Device Role / Timing Role: Low-power, rail-to-rail ADC interfacing with 4–20 mA loop-powered sensors via precision shunt resistors. Use Value: 0 V to VCC input common-mode range accommodates varying sensor output offsets; 1 µA sleep current extends battery life in wireless nodes. |
| Direct Temperature Measurement | Strain Gauge Transducers |
Use Scenario: Embedded temperature monitoring using the on-chip PTAT sensor or external thermistors. IC Role / Device Role / Timing Role: Configurable ADC measuring internal die temperature (390–450 mV at 27°C) or external NTC/PTC elements with programmable gain. Use Value: On-chip temperature sensor provides system thermal awareness without external components; 16-bit resolution resolves <0.01°C steps. | Use Scenario: Precision force and torque sensing in test equipment using full-bridge foil strain gauges. IC Role / Device Role / Timing Role: Differential ADC with zero input current and 140 dB CMRR digitizing mV-level bridge outputs under noisy EMI conditions. Use Value: Easy Drive technology prevents signal degradation from cable capacitance and source impedance mismatch, preserving measurement fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS124S08IPW | 24-bit resolution, integrated PGA and burnout current sources; no internal oscillator; SPI interface with CRC. | Targets higher-precision applications (e.g., RTD measurement) requiring >16-bit resolution and sensor diagnostics. | Select when needing 24-bit performance, built-in excitation current, or enhanced fault detection - not for drop-in replacement. |
| MAX11206ETK+ | 18-bit resolution, 2.5 V internal reference, fixed 50/60 Hz rejection, no programmable gain; 10-lead TDFN package. | Suited for cost-sensitive portable instruments where fixed gain and reference simplify design. | Choose for lower power (350 nA sleep) and simpler configuration - but lacks gain flexibility and rail-to-rail input range. |
Compared with ADS124S08IPW and MAX11206ETK+, the LTC2480CMS#PBF uniquely balances 16-bit precision, zero-differential-input-current operation, and configurable line rejection in a compact MSOP - making it optimal for high-impedance industrial sensor interfaces where bufferless direct digitization is required.
Availability
LTC2480CMS#PBF is available at Aetrix Electronics and suitable for weight scales, industrial process control systems, and strain gauge transducer interfaces requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature.
Supply support for LTC2480CMS#PBF 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, formed through the acquisition of Linear Technology in 2017.
The LTC2480CMS#PBF belongs to ADI's precision delta-sigma ADC product line, designed specifically for direct digitization of high-impedance, low-level sensor signals in harsh industrial and instrumentation environments.
FAQ
What is the operating temperature range for the LTC2480CMS#PBF?
The LTC2480CMS#PBF is rated for 0°C to 70°C ambient operation, as indicated by the "C" grade suffix in its ordering part number. This distinguishes it from the I-grade (–40°C to 85°C) and H-grade (–40°C to 125°C) variants. All electrical specifications in the datasheet marked with "l" apply across this full commercial temperature range.
Does the LTC2480CMS#PBF require an external crystal or oscillator?
No, the LTC2480CMS#PBF includes an on-chip trimmed oscillator running at 307.2 kHz, eliminating the need for external timing components. The fO pin can be tied to GND to enable internal clocking; alternatively, an external clock (10–1000 kHz) may be applied to fO to adjust conversion rate or rejection null frequency.
How does the Easy Drive technology in the LTC2480CMS#PBF improve measurement accuracy?
Easy Drive technology in the LTC2480CMS#PBF automatically cancels differential input current during sampling, reducing dynamic input current errors to zero. This allows direct digitization of high-impedance sources (e.g., strain gauges, thermistors) up to 100 kΩ without external op-amp buffers - preserving DC accuracy and eliminating associated offset, drift, and noise.
Can the LTC2480CMS#PBF measure its own die temperature?
Yes, the LTC2480CMS#PBF integrates a PTAT (proportional-to-absolute-temperature) sensor that outputs 390–450 mV at 27°C. This internal temperature reading can be selected via the SDI configuration command, enabling system-level thermal monitoring without adding external sensors or circuitry.
What is the maximum achievable output data rate of the LTC2480CMS#PBF?
In 2× speed mode with internal oscillator and 50 Hz rejection, the LTC2480CMS#PBF achieves a conversion time of 78.7 ms, corresponding to ~12.7 samples per second. With external clocking at 1000 kHz on fO, the minimum conversion time drops to ~20.6 ms (~48.5 sps), though line rejection performance degrades outside specified oscillator ranges.
LTC2480CMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2480CMS#PBF FAQ
1.How can I place an order for LTC2480CMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2480CMS#PBF 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 LTC2480CMS#PBF reliable?
The price and inventory of LTC2480CMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2480CMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC2480CMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2480CMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2480CMS#PBF?
LTC2480CMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2480CMS#PBF 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 LTC2480CMS#PBF?
For technical support, including LTC2480CMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2480CMS#PBF requirements.
6.How does Aetrix verify that LTC2480CMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2480CMS#PBF 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 LTC2480CMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC2480CMS#PBF?
All LTC2480CMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2480CMS#PBF, 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 LTC2480CMS#PBF part is unused and in its original packaging.
Return procedure for LTC2480CMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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