Analog Devices Inc. LTC2486IDE#TRPBF

Overview

LTC2486IDE#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 4-channel (2-differential) delta-sigma ADC with integrated PGA, Easy Drive input current cancellation, and on-chip temperature sensor. It delivers 2 ppm INL, 600 nV RMS noise, and simultaneous 50/60 Hz rejection - enabling direct digitization of high-impedance sensors in industrial process monitoring systems.

For engineers reviewing the LTC2486IDE#TRPBF datasheet, LTC2486IDE#TRPBF pinout, LTC2486IDE#TRPBF application, or LTC2486IDE#TRPBF equivalent, key selection criteria include rail-to-rail input common-mode range (GND to VCC), programmable gain (1–256), internal oscillator operation, and guaranteed no missing codes across –40°C to +85°C.

Technical Context

The LTC2486IDE#TRPBF uses a 3rd-order delta-sigma modulator with decimating FIR filter and auto-calibration architecture. Its patented Easy Drive sampling scheme cancels differential input current dynamically, eliminating errors from external source impedance up to 10 MΩ without buffer amplifiers.

It supports dual-speed operation: normal mode (15.7 Hz output rate with 50/60 Hz rejection) and 2x speed mode (31.4 Hz, gain limited to 128). The device features a 4-wire SPI-compatible interface with configurable SCK direction (input for external clock, output for internal clock) and automatic channel settling - first conversion after channel change is valid.

Key Specifications

Pinout & Package

Package: 14-lead (4 mm × 3 mm) plastic DFN with exposed pad (Pin 15 = GND, must be soldered).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS124S08IPWR and MAX11206ETL+, the LTC2486IDE#TRPBF uniquely combines 4-channel multiplexing, integrated temperature sensing, simultaneous 50/60 Hz rejection, and Easy Drive input cancellation - making it optimal for compact, self-compensating industrial DAQ systems.

Availability

LTC2486IDE#TRPBF is available at Aetrix Electronics and suitable for industrial process control, portable instrumentation, and environmental monitoring applications requiring stable component supply across extended temperature ranges.

Supply support for LTC2486IDE#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, including high-performance delta-sigma ADCs, voltage references, and power management ICs.

The LTC2486IDE#TRPBF belongs to Linear's No Latency DS™ family, designed specifically for high-accuracy, low-power, multi-channel data acquisition in space-constrained industrial and instrumentation systems.

FAQ

What is the operating temperature range of the LTC2486IDE#TRPBF?

The LTC2486IDE#TRPBF is rated for –40°C to +85°C (Industrial grade). This is confirmed by the "I" suffix in the part number and specified in the Absolute Maximum Ratings table. The device maintains full performance-including 2 ppm INL and 0.6 µV RMS noise-across this entire range, with temperature sensor accuracy of ±2°C absolute.

Does the LTC2486IDE#TRPBF require an external crystal or oscillator?

No, the LTC2486IDE#TRPBF includes a fully integrated oscillator and operates autonomously when fO is tied to GND. An external clock (10–1000 kHz) may be applied to fO only if custom data rates or filter null positioning are required. The internal oscillator runs at 307.2 kHz and enables immediate operation without external timing components.

How does Easy Drive technology benefit sensor interfacing in the LTC2486IDE#TRPBF?

Easy Drive technology in the LTC2486IDE#TRPBF cancels differential input current dynamically during sampling, resulting in zero net current draw from the signal source. This allows direct connection to high-impedance sensors (e.g., pH probes, piezoresistive elements) up to 10 MΩ without buffer amplifiers-preserving DC accuracy and eliminating bias-induced errors.

Can the LTC2486IDE#TRPBF measure its own die temperature?

Yes, the LTC2486IDE#TRPBF integrates a calibrated PTAT temperature sensor with 0.5°C resolution and ±2°C absolute accuracy. When configured to read the internal sensor, it outputs temperature data via the same 24-bit SPI interface used for analog channels-enabling real-time thermal compensation of offset and full-scale errors in the host firmware.

What is the minimum reference voltage required for temperature measurement on the LTC2486IDE#TRPBF?

For internal temperature sensor operation, the LTC2486IDE#TRPBF requires a minimum reference voltage (VREF = REF+ – REF–) of 2 V. This is explicitly stated in the Pin Functions section. Below 2 V, temperature readings are not guaranteed; standard analog conversions remain functional down to VREF = 0.1 V.