Analog Devices Inc. LTC2480IMS#TRPBF

Overview

LTC2480IMS#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 features programmable gain (1–256), simultaneous 50Hz/60Hz line rejection, internal oscillator, rail-to-rail input range (0V to VCC), and ±2 ppm INL. It directly digitizes high-impedance sensors-such as strain gauges or load cells-in industrial instrumentation and precision weight scales.

For engineers reviewing the LTC2480IMS#TRPBF datasheet, LTC2480IMS#TRPBF pinout, LTC2480IMS#TRPBF application, or LTC2480IMS#TRPBF 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 internal/external clocking with configurable rejection modes.

Technical Context

The LTC2480IMS#TRPBF implements a third-order delta-sigma modulator with continuous auto-calibration of offset and full-scale, eliminating drift without user intervention. Its Easy Drive sampling scheme cancels dynamic input current errors by balancing differential input currents, enabling direct connection to sensors with source impedances up to 100 kΩ while preserving DC accuracy.

It supports two conversion speed modes: normal (78.7–163.5 ms conversion time) and 2× speed (39.4–82.7 ms), with selectable line rejection (50 Hz, 60 Hz, or simultaneous 50/60 Hz) and programmable gain via SPI-compatible 4-wire interface (CS, SCK, SDI, SDO). The internal oscillator runs at 307.2 kHz for default timing.

Key Specifications

Pinout & Package

Package: 10-Lead Plastic MSOP (3.0 mm × 3.0 mm × 1.0 mm), exposed pad grounded. Rated for –40°C to +85°C operating temperature.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar delta-sigma ADC applications.

Compared with ADS124S08IPWR and MAX11206ETK+, the LTC2480IMS#TRPBF uniquely combines 16-bit precision, zero-differential-input-current architecture, and hardware-enabled simultaneous 50/60 Hz rejection in a compact MSOP package - making it optimal for globally deployed, battery-conscious instrumentation requiring minimal external components.

Availability

LTC2480IMS#TRPBF is available at Aetrix Electronics and suitable for industrial process control, precision weight scales, and portable DVMs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2480IMS#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 acquired Linear Technology in 2017 and maintains its precision analog portfolio, known for high-performance signal conditioning ICs targeting demanding measurement applications.

The LTC2480IMS#TRPBF belongs to Linear's No Latency Delta-Sigma ADC family, designed specifically for high-accuracy, low-power, direct-sensor-digitization in industrial, test, and medical instrumentation where input current cancellation and line rejection are critical.

FAQ

What is the operating temperature range for the LTC2480IMS#TRPBF?

The LTC2480IMS#TRPBF is rated for –40°C to +85°C operation, matching the "I" grade specification in the official ordering matrix. This range supports deployment in industrial environments including factory floors, outdoor metering, and automotive test fixtures where ambient temperatures exceed commercial limits. The device maintains specified offset error (±0.5 µV), INL (±2 ppm), and line rejection performance across this full range.

Does the LTC2480IMS#TRPBF require an external crystal or oscillator?

No, the LTC2480IMS#TRPBF includes an on-chip trimmed oscillator running at 307.2 kHz, eliminating the need for external timing components. When fO is tied to GND, the internal oscillator automatically controls conversion timing and enables all line rejection modes. An external clock may be applied to fO only if custom data rates or alternate filter nulls are required - not for basic operation.

How does the Easy Drive technology in the LTC2480IMS#TRPBF improve sensor interface accuracy?

Easy Drive technology in the LTC2480IMS#TRPBF cancels differential input current dynamically during sampling, resulting in IDIFF = 0 across the full input range. This eliminates voltage errors caused by source impedance mismatch - allowing direct connection of high-impedance sensors (e.g., 10 kΩ strain gauges or thermistors) without buffer amplifiers while preserving 16-bit linearity and ±0.5 µV offset accuracy.

Can the LTC2480IMS#TRPBF measure its own die temperature?

Yes, the LTC2480IMS#TRPBF integrates a PTAT (proportional-to-absolute-temperature) sensor that outputs 390–450 mV at 27°C. By configuring SDI to select the internal temperature sensor instead of IN+ or IN–, the device digitizes this voltage with the same 16-bit resolution and calibration - enabling on-chip thermal monitoring or cold-junction compensation without external components.

What is the maximum achievable output data rate of the LTC2480IMS#TRPBF?

In 2× speed mode with internal oscillator, the LTC2480IMS#TRPBF achieves a maximum output data rate of approximately 15 readings per second (15 Hz) - corresponding to a minimum conversion time of 39.4 ms (50 Hz rejection) to 41.4 ms (simultaneous 50/60 Hz). External clocking can further increase rate, but resolution and line rejection performance remain constrained by the underlying delta-sigma filter architecture.