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Analog Devices Inc. LTC2480IMS#PBF
- Part No.:
- LTC2480IMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2480IMS#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:210
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Product details
Overview
LTC2480IMS#PBF from Analog Devices (formerly Linear Technology) is a 16-bit plus sign no-latency delta-sigma analog-to-digital converter with patented Easy Drive input current cancellation. It delivers 2 ppm INL, 1 ppm offset error, and simultaneous 50 Hz/60 Hz line rejection while operating from a single 2.7V to 5.5V supply in a 10-lead MSOP package. It directly digitizes rail-to-rail high-impedance sensor signals-such as strain gauges or load cells-without external buffering.
For engineers reviewing the LTC2480IMS#PBF datasheet, LTC2480IMS#PBF pinout, LTC2480IMS#PBF application, or LTC2480IMS#PBF equivalent, key selection criteria include its programmable gain (1–256), internal oscillator eliminating external crystals, GND-to-VCC common-mode input range independent of reference voltage, and guaranteed no missing codes across –40°C to +85°C industrial temperature range.
Technical Context
The LTC2480IMS#PBF implements a third-order delta-sigma modulator with automatic on-chip offset and full-scale calibration, enabling transparent continuous correction without latency. Its Easy Drive sampling scheme cancels differential input current dynamically, allowing direct connection to sensors with source impedances up to 100 kΩ while maintaining DC accuracy.
It supports both internal (307.2 kHz) and external oscillator modes, configurable for 50 Hz, 60 Hz, or simultaneous 50/60 Hz rejection. The 4-wire SPI-compatible interface includes SDI for configuration (gain, rejection mode, speed), SDO for 24-bit output, and CS-controlled sleep/wake transitions-reducing typical supply current to 1 µA in sleep mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit plus sign, no missing codes-guarantees monotonicity and full code coverage for precision measurement systems. |
| INL | 2 ppm of VREF (typical)-enables sub-µV-level linearity in high-gain sensor interfaces like precision weight scales. |
| Offset Error | 1 µV (typical), 2.5 µV (max) over temperature-supports zero-point stability in direct-temperature or bridge transducer applications. |
| Full-Scale Error | ±25 ppm of VREF (max)-ensures accurate scaling across programmable gains without recalibration. |
| Line Rejection | Simultaneous 50 Hz/60 Hz at 87 dB-eliminates mains interference in industrial instrumentation without external notch filters. |
| Supply Range | 2.7 V to 5.5 V-compatible with single-cell Li-ion, 3.3 V, and 5 V logic rails without level-shifting. |
| Operating Temp | –40°C to +85°C-qualified for industrial process control and embedded metering environments. |
Pinout & Package
The LTC2480IMS#PBF is housed in a 10-lead plastic MSOP package (3.0 mm × 3.0 mm × 1.1 mm body, 0.5 mm pitch). Exposed pad is not present in MSOP; thermal performance relies on standard PCB copper area under the package.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SDI (Pin 1) | Serial Data Input | Configures gain (1–256), line rejection mode (50/60/simultaneous), 2x speed, and input source (external or internal temp sensor) on rising edge of SCK. |
| VCC (Pin 2) | Positive Supply | 2.7 V to 5.5 V analog/digital supply; requires local 1 µF tantalum + 0.1 µF ceramic bypass to GND (Pin 8). |
| VREF (Pin 3) | Reference Input | Accepts 0.1 V to VCC; negative reference is GND-enables ratiometric or absolute measurements with flexible reference sourcing. |
| IN+ / IN– (Pins 4, 5) | Differential Analog Inputs | Rail-to-rail common-mode range (GND to VCC); differential input range = ±0.5 × VREF/GAIN-directly interfaces with unbuffered strain gauges or thermistors. |
| CS (Pin 6) | Active-Low Chip Select | Wakes device from 1 µA sleep mode; falling edge initiates conversion; rising edge during data transfer aborts and restarts conversion. |
| SDO (Pin 7) | Three-State Serial Output | Outputs 24-bit conversion result on falling edge of SCK; high-Z when CS = HIGH-enables bus sharing with other SPI peripherals. |
| GND (Pin 8) | Ground | Single-pin analog/digital/reference ground-must connect to low-impedance PCB ground plane to maintain PSRR and CMRR performance. |
| SCK (Pin 9) | Bidirectional Clock | Auto-configures as input (external clock mode) or output (internal clock mode) based on logic state at power-up or CS fall-no mode pin required. |
| fO (Pin 10) | Frequency Control | Ground = internal 307.2 kHz oscillator; driven externally = programmable conversion rate and filter null placement-supports custom line rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Easy Drive Input Current Cancellation | Zero net differential input current enables direct connection to high-impedance sensors (e.g., 100 kΩ thermistors) without signal degradation or external op-amp buffering. |
| No-Latency Delta-Sigma Architecture | Digital filter settles in one conversion cycle-provides immediate valid output after CS assertion, eliminating pipeline delay in closed-loop control. |
| Programmable Gain (1–256) | Eight discrete gain steps allow optimal ADC utilization across wide dynamic range inputs-from mV-level thermocouples to V-level bridge outputs-without external amplifiers. |
| Internal Trimmed Oscillator | Eliminates need for external crystal or oscillator; factory-trimmed 307.2 kHz clock ensures precise 50/60 Hz rejection without component count or layout overhead. |
| Continuous Auto-Calibration | On-chip offset and full-scale calibration runs transparently during normal operation-maintains accuracy over time and temperature without user intervention or system downtime. |
Applications
| Weight Scales | Industrial Process Control |
|---|---|
Use Scenario: High-precision platform or hopper scales measuring loads from grams to tons using strain gauge bridges. IC Role / Device Role / Timing Role: Direct digitizer of millivolt-level bridge outputs with 2 ppm INL and simultaneous 50/60 Hz rejection to suppress ambient EMI. Use Value: Eliminates external instrumentation amplifier and analog filter stages-reducing BOM cost, board space, and calibration complexity while achieving NTEP Class III compliance. | Use Scenario: Analog input modules in PLCs or DCS systems acquiring sensor data (pressure, flow, level) in noisy factory environments. IC Role / Device Role / Timing Role: Precision front-end ADC with GND-to-VCC input range and 140 dB CMRR-accepts grounded or floating 4–20 mA loop receivers and RTD interfaces. Use Value: Enables single-chip acquisition of multiple sensor types without input conditioning; internal oscillator ensures consistent timing across distributed I/O nodes. |
| Direct Temperature Measurement | Strain Gauge Transducers |
Use Scenario: Embedded temperature monitoring in motor drives, power supplies, or battery packs using on-chip PTAT sensor or external thermistors. IC Role / Device Role / Timing Role: Dual-function ADC: measures internal die temperature (390–450 mV PTAT output) or external NTC/PTC sensors with programmable gain and 1 µV offset. Use Value: Reduces thermal management subsystem cost by integrating sensing and digitization-supports predictive maintenance via drift-aware calibration. | Use Scenario: Structural health monitoring in aerospace or civil engineering using bonded foil or MEMS strain gauges. IC Role / Device Role / Timing Role: Low-noise (0.6 µVRMS), high-impedance interface with rail-to-rail input and Easy Drive-preserves microstrain resolution despite long cable runs and EMI. Use Value: Achieves <1 µε resolution without guard traces or shielded cabling-simplifies sensor integration in space-constrained or high-vibration environments. |
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 requires external reference and lacks simultaneous 50/60 Hz rejection. | Better suited for ultra-high-resolution applications where 16-bit is insufficient; less optimal for mains-noise-limited industrial sites. | Select ADS124S08IPWR when >16-bit resolution is mandatory and external reference design is acceptable. |
| MAX11206ETL+ | 18-bit resolution, internal oscillator, but only 50 Hz or 60 Hz rejection-not simultaneous-and higher 3.5 µV offset error. | Appropriate for cost-sensitive portable instruments where dual-frequency rejection is unnecessary. | Choose MAX11206ETL+ for handheld DMMs or battery-powered sensors where simultaneous rejection is not required. |
Compared with ADS124S08IPWR and MAX11206ETL+, the LTC2480IMS#PBF uniquely combines guaranteed 16-bit no-missing-codes performance, simultaneous 50/60 Hz rejection, and zero-differential-input-current operation in a compact MSOP-making it optimal for industrial sensor nodes where robustness, simplicity, and noise immunity are prioritized over raw bit depth.
Availability
LTC2480IMS#PBF is available at Aetrix Electronics and suitable for industrial process control, precision instrumentation, and embedded sensor interface applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2480IMS#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, serving industrial, automotive, communications, and healthcare markets.
The LTC2480IMS#PBF belongs to ADI's legacy Linear Technology precision delta-sigma ADC product line, engineered specifically for direct sensor digitization in electrically noisy, thermally demanding industrial environments-emphasizing ease of use, self-calibration, and mains-frequency immunity.
FAQ
What is the maximum source impedance the LTC2480IMS#PBF can drive without accuracy loss?
The LTC2480IMS#PBF uses patented Easy Drive technology to cancel differential input current, enabling accurate digitization of signals from sources up to 100 kΩ without external buffering. This is confirmed by the "+FS Error vs RSOURCE" plot in the datasheet, which shows <±20 ppm error at 100 kΩ with VCC = 5 V, VREF = 5 V, and TA = 25°C. Performance remains stable across the full –40°C to +85°C range.
Does the LTC2480IMS#PBF require an external crystal or oscillator?
No, the LTC2480IMS#PBF includes a factory-trimmed internal oscillator operating at 307.2 kHz, sufficient for precise 50 Hz, 60 Hz, or simultaneous 50/60 Hz line rejection. An external clock may be applied to the fO pin only if custom conversion rates or alternate filter nulls are needed-the internal oscillator eliminates BOM cost and layout complexity in standard applications.
How does the LTC2480IMS#PBF achieve simultaneous 50 Hz and 60 Hz rejection?
The LTC2480IMS#PBF achieves simultaneous 50 Hz/60 Hz rejection through a digitally configured delta-sigma modulator filter with a null placed at both frequencies using an internal oscillator frequency of 280 kHz (±2%). This is distinct from sequential rejection modes and is verified in the "Input Normal Mode Rejection" table, specifying 87 dB rejection in simultaneous mode across the full temperature range.
What is the guaranteed operating temperature range for the LTC2480IMS#PBF?
The LTC2480IMS#PBF is rated for –40°C to +85°C operation (I-grade), as explicitly stated in the "ORDER INFORMATION" table. All key specifications-including INL (2 ppm), offset error (2.5 µV max), and line rejection (87 dB)-are guaranteed over this full industrial temperature range, not just at 25°C.
Can the LTC2480IMS#PBF measure its own die temperature?
Yes, the LTC2480IMS#PBF integrates a PTAT (Proportional To Absolute Temperature) sensor with a nominal output of 390–450 mV at 27°C. This internal temperature reading can be selected via the SDI pin configuration and digitized with the same 16-bit resolution and calibration integrity as external inputs-enabling thermal monitoring without additional components.
LTC2480IMS#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2480IMS#PBF FAQ
1.How can I place an order for LTC2480IMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2480IMS#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 LTC2480IMS#PBF reliable?
The price and inventory of LTC2480IMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2480IMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC2480IMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2480IMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2480IMS#PBF?
LTC2480IMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2480IMS#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 LTC2480IMS#PBF?
For technical support, including LTC2480IMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2480IMS#PBF requirements.
6.How does Aetrix verify that LTC2480IMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2480IMS#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 LTC2480IMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC2480IMS#PBF?
All LTC2480IMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2480IMS#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 LTC2480IMS#PBF part is unused and in its original packaging.
Return procedure for LTC2480IMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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