Analog Devices Inc. LTC2472IMS#TRPBF

Overview

LTC2472IMS#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit delta-sigma ADC with integrated 1.25V precision reference, differential ±V_REF input range, and user-selectable 208sps or 833sps output rate. It operates from 2.7V to 5.5V, features SPI interface, auto-shutdown after conversion, and achieves ≤2 LSB integral nonlinearity at 208sps - used in high-accuracy industrial sensor signal conditioning.

For engineers reviewing the LTC2472IMS#TRPBF datasheet, LTC2472IMS#TRPBF pinout, LTC2472IMS#TRPBF application, or LTC2472IMS#TRPBF equivalent, key selection criteria include its 2ppm/°C reference drift (I-grade), 50nA average input sampling current, 2µA max sleep current, and MSOP-12 package compatibility with space-constrained analog front-ends.

Technical Context

The LTC2472IMS#TRPBF implements a proprietary delta-sigma architecture with internal oscillator and no latency - each conversion yields one valid 16-bit result with single-cycle settling for multiplexed inputs. Its differential input stage accepts ±1.25V full-scale range referenced to internal V_REF, and supports programmable SPD/SLP bits via SDI to configure output rate and reference power-down.

It uses a 3.5mA typical supply current during conversion and drops to ≤2µA in sleep mode when both ADC and reference are disabled. The integrated 1.25V reference delivers 0.1% initial accuracy and ±5ppm/°C max drift over –40°C to +85°C, with 0.1µF REFOUT/COMP decoupling enabling stable low-noise operation.

Key Specifications

Pinout & Package

Package: 12-lead MSOP (3mm × 3mm), exposed pad optional, rated for –40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS124S08IPW and MAX11206ETK+, the LTC2472IMS#TRPBF uniquely combines 16-bit precision, dual-rate programmability, 2µA sleep current, and fully integrated reference in an MSOP-12 package - optimizing for space-constrained, battery-aware industrial sensors requiring rapid integration and minimal external components.

Availability

LTC2472IMS#TRPBF is available at Aetrix Electronics and suitable for industrial process monitoring, environmental sensor interfaces, and embedded ADC upgrades requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for LTC2472IMS#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.

The LTC2472IMS#TRPBF belongs to the LTC® precision delta-sigma ADC family, designed specifically for high-accuracy, low-power sensor signal acquisition in harsh industrial and medical environments where reference stability and input simplicity are critical.

FAQ

What is the operating temperature range of the LTC2472IMS#TRPBF?

The LTC2472IMS#TRPBF is specified for –40°C to +85°C operation (I-grade). This extended range ensures reliable performance in industrial control cabinets, outdoor environmental enclosures, and automotive under-hood sensor modules where ambient temperatures exceed commercial-grade limits.

Does the LTC2472IMS#TRPBF require an external crystal or clock source?

No, the LTC2472IMS#TRPBF includes a fully integrated oscillator and requires no external clock components. Its internal timing generator enables complete system-level simplification - eliminating crystal cost, board space, and frequency tolerance dependencies while maintaining consistent conversion timing across voltage and temperature.

How does the LTC2472IMS#TRPBF achieve low input current without compromising accuracy?

The LTC2472IMS#TRPBF uses a proprietary input sampling scheme that reduces average input current to 50nA - over two orders of magnitude lower than conventional delta-sigma ADCs. This enables direct RC filtering (e.g., 1kΩ/0.1µF) with <1 LSB error, preserving DC accuracy while avoiding op-amp buffer stages and their associated noise, drift, and power penalties.

Can the LTC2472IMS#TRPBF interface with standard SPI controllers?

Yes, the LTC2472IMS#TRPBF supports standard SPI protocols with CPOL = 0 or 1 and CPHA = 0. It delivers 16-bit MSB-first data on SDO synchronized to SCK falling edges, accepts 4-bit commands on SDI at SCK rising edges, and uses active-low CS for frame synchronization - ensuring seamless integration with MCU, FPGA, and SoC SPI peripherals without custom logic.

What is the maximum allowed reference capacitor value on REFOUT and COMP pins?

The LTC2472IMS#TRPBF requires the capacitor on COMP to be ≥ the capacitor on REFOUT. While 0.1µF is recommended for optimal noise and startup time (12ms), the datasheet permits up to 1µF on COMP if REFOUT capacitance is reduced accordingly. Exceeding this ratio risks instability, increased transition noise, or failure to settle within specification.