Analog Devices Inc. LTC2460IDD#PBF

Overview

LTC2460IDD#PBF from Analog Devices (formerly Linear Technology) is a single-ended, 16-bit delta-sigma ADC with integrated 1.25V precision reference, operating from 2.7V to 5.5V supply and communicating via SPI. It delivers 60 conversions per second, 2 LSB offset error, 0.01% gain error, and ±5 ppm/°C reference drift over –40°C to +85°C - enabling high-accuracy direct temperature and sensor measurements in space-constrained industrial monitoring systems.

For engineers reviewing the LTC2460IDD#PBF datasheet, LTC2460IDD#PBF pinout, LTC2460IDD#PBF application, or LTC2460IDD#PBF equivalent, key selection considerations include its ultra-low 200 nA sleep current, no-latency serial output, internal oscillator eliminating external timing components, and compatibility with multiplexed analog inputs requiring single-cycle settling.

Technical Context

The LTC2460IDD#PBF implements a proprietary delta-sigma architecture with continuous internal offset and full-scale calibration, ensuring stability across temperature without user intervention. Its input sampling scheme draws only 50 nA average input current, enabling direct RC filtering without significant error.

It operates in three deterministic states - CONVERT (16.6 ms nominal), SLEEP/NAP, and DATA INPUT/OUTPUT - with automatic power-down after conversion. Reference startup time is 12 ms when COMP and REFOUT capacitors are both 0.1 µF, and the device supports both CPOL = 0 and CPOL = 1 SPI modes with no latency data output.

Key Specifications

Pinout & Package

Package: 12-lead (3 mm × 3 mm) plastic DFN with exposed pad (Pin 13), rated for –40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS1115IDGSR and LTC2450CGN#PBF, the LTC2460IDD#PBF uniquely balances 16-bit accuracy, 60 sps throughput, 200 nA sleep current, and fully integrated reference in a 3 mm × 3 mm footprint - making it optimal for compact, battery-aware sensor nodes requiring guaranteed monotonicity and no-latency output.

Availability

LTC2460IDD#PBF is available at Aetrix Electronics and suitable for environmental monitoring, industrial process control, and embedded ADC upgrades requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2460IDD#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.

The LTC2460IDD#PBF belongs to the LTC® ultra-precision delta-sigma ADC family, designed specifically for space-constrained, low-power instrumentation and sensor interface applications demanding integrated references and guaranteed monotonicity.

FAQ

What is the operating temperature range of the LTC2460IDD#PBF?

The LTC2460IDD#PBF is specified for –40°C to +85°C operation (I-grade). This range is confirmed in the "Order Information" table and validated across all electrical characteristics including reference drift (±5 ppm/°C max), offset error, and supply current. The DFN package's thermal performance (θJA = 43°C/W) supports reliable operation within this envelope under typical PCB copper pour conditions.

Does the LTC2460IDD#PBF require an external crystal or oscillator?

No, the LTC2460IDD#PBF includes a fully integrated oscillator - no external timing components are needed. This is explicitly stated in the Features list ("Internal Oscillator-No External Components Required") and confirmed in the Applications Information section, which notes the device "performs conversions with no latency for multiplexed applications" due to internal timing control.

How does the LTC2460IDD#PBF handle input overrange and underrange conditions?

The LTC2460IDD#PBF clamps output codes at 0 (all zeros) for inputs below 0 V and at 65535 (all ones) for inputs above VREF (1.25 V). This behavior is documented in the "Input Voltage Range (LTC2460)" section and verified in Table 1, where "≥VREF" maps to decimal 65535 and "≤0" maps to 0 - ensuring predictable saturation without damage or undefined states.

Can the LTC2460IDD#PBF operate with a 3.3 V supply?

Yes, the LTC2460IDD#PBF supports 2.7 V to 5.5 V supply voltage, fully covering 3.3 V operation. Electrical Characteristics confirm ICC = 1.5 mA (typ) at VCC = 4.1 V and 2.7 V, and reference output remains stable (1.247–1.253 V) across this range. Power Supply Rejection is 80 dB (DC), ensuring robustness against 3.3 V rail noise.

What is the purpose of the COMP pin on the LTC2460IDD#PBF?

The COMP pin (Pin 2) provides internal reference compensation and must be connected to a 0.1 µF capacitor to GND for low-noise, stable reference operation. Per the Pin Functions section, this capacitor value must be ≥ the capacitor on REFOUT; violating this causes reference instability. It is not a general-purpose decoupling node - its sole function is reference loop compensation.