Analog Devices Inc. LTC2471IMS#TRPBF

Overview

LTC2471IMS#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, single-ended I²C ΔΣ ADC with integrated 1.25V precision reference, selectable 208sps/833sps output rate, ±1mV offset error, and 0.01% gain error-designed for low-power sensor monitoring in industrial process control systems.

For engineers reviewing the LTC2471IMS#TRPBF datasheet, LTC2471IMS#TRPBF pinout, LTC2471IMS#TRPBF application, or LTC2471IMS#TRPBF equivalent, key selection factors include its 2µA max sleep current, internal oscillator eliminating external timing components, single-cycle conversion settling, and MSOP-12 package compatibility with space-constrained embedded data acquisition designs.

Technical Context

The LTC2471IMS#TRPBF implements a delta-sigma architecture with 8,192× oversampling at 208sps (or 2,048× at 833sps), enabling relaxed anti-aliasing filter requirements. Its proprietary input sampling scheme draws only 50nA average input current, supporting direct RC filtering without buffer amplifiers.

It operates from a single 2.7V–5.5V supply, uses an internal oscillator, and supports I²C fast-mode (400kHz) communication. The device transitions automatically between CONVERT, NAP, and SLEEP states-reducing supply current to 2µA (max) when both ADC and reference are powered down.

Key Specifications

Pinout & Package

Package: 12-lead plastic MSOP (3mm × 4.9mm), exposed pad not present (unlike DFN variant); operating temperature range –40°C to +85°C (I-grade).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit I²C ADC applications.

Compared with ADS1115IDGSR and MCP3424-E/SL, the LTC2471IMS#TRPBF delivers superior reference stability (≤10ppm/°C), lower sleep current (2µA max), and automatic power-state management-making it optimal for low-duty-cycle, single-sensor, long-life embedded systems where reference integrity and firmware simplicity are prioritized over channel count or raw bit depth.

Availability

LTC2471IMS#TRPBF is available at Aetrix Electronics and suitable for industrial process control, environmental monitoring, and embedded ADC upgrade programs requiring stable component supply, extended temperature operation (–40°C to +85°C), and long-term lifecycle support.

Supply support for LTC2471IMS#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2471IMS#TRPBF belongs to ADI's precision delta-sigma ADC product line, engineered for low-power, high-accuracy sensor interfacing in space- and energy-constrained embedded systems-emphasizing ease of use, minimal external components, and guaranteed performance across temperature.

FAQ

What is the operating temperature range for the LTC2471IMS#TRPBF?

The LTC2471IMS#TRPBF is rated for –40°C to +85°C (I-grade), verified per manufacturer specifications. This range applies to all electrical characteristics including reference drift (≤10ppm/°C), offset error (±1mV), and supply current (3.5mA typ during conversion). The MSOP-12 package is qualified for this extended industrial temperature range, making LTC2471IMS#TRPBF suitable for deployment in harsh environments such as factory floors or outdoor sensor enclosures.

Does the LTC2471IMS#TRPBF require an external clock source?

No, the LTC2471IMS#TRPBF includes a fully integrated oscillator and requires no external clock components. This internal timing generator drives the delta-sigma modulator and digital filter, ensuring consistent conversion timing across voltage and temperature variations. The absence of an external clock simplifies layout, reduces BOM cost, and eliminates clock-related jitter or EMI concerns-key advantages confirmed in the LTC2471IMS#TRPBF datasheet and functional block diagram.

How does the sleep mode function in the LTC2471IMS#TRPBF?

In sleep mode (SLP = 1), the LTC2471IMS#TRPBF powers down both the ADC core and the internal 1.25V reference after conversion completion, reducing supply current to ≤2µA. Upon receiving a valid I²C address acknowledge, the reference restarts (12ms startup time with 0.1µF capacitors), followed by ADC reactivation. The first conversion after wake-up must be discarded or delayed until reference settles-this behavior is explicitly defined in the LTC2471IMS#TRPBF applications information section.

What is the input voltage range of the LTC2471IMS#TRPBF?

The LTC2471IMS#TRPBF has a single-ended input range of 0V to V_REF (1.25V nominal), meaning it accepts analog signals from ground up to the reference voltage. Inputs below 0V clamp to code 0; inputs ≥ V_REF clamp to code 65535. This range is fixed and non-ratiometric-the reference is internal and independent of VCC, so input full-scale remains stable even with supply variation (2.7V–5.5V), as confirmed in the Electrical Characteristics table.

Can the LTC2471IMS#TRPBF be used with standard I²C buses running at 400kHz?

Yes, the LTC2471IMS#TRPBF supports I²C fast-mode operation up to 400kHz, with validated timing parameters including t_LOW (1.3µs min), t_HIGH (0.6µs min), and t_HD(DAT) (0.9µs max). It functions exclusively as an I²C slave device and responds to 7-bit addresses (0010100b or 1010100b depending on A0 pin state). All timing specifications are guaranteed over the full –40°C to +85°C operating range, ensuring robust interoperability with standard microcontroller I²C peripherals.