Analog Devices Inc. LTC1403ACMSE-1#TRPBF

Overview

LTC1403ACMSE-1#TRPBF from Analog Devices (formerly Linear Technology) is a 14-bit, 2.8 Msps serial analog-to-digital converter with differential inputs, 3V single-supply operation, ±1.25V bipolar input range, and integrated 2.5V bandgap reference - designed for high-speed portable data acquisition in space-constrained systems.

For engineers reviewing the LTC1403ACMSE-1#TRPBF datasheet, LTC1403ACMSE-1#TRPBF pinout, LTC1403ACMSE-1#TRPBF application, or LTC1403ACMSE-1#TRPBF equivalent, key selection criteria include sampling rate vs. power trade-off (14 mW active, 10 µW sleep), differential CMRR (80 dB at 1 MHz), 3-wire serial interface timing compliance, and MSOP-10 thermal performance under continuous 2.8 Msps throughput.

Technical Context

The LTC1403ACMSE-1#TRPBF implements a fully differential sample-and-hold front-end followed by a 14-bit successive approximation register (SAR) ADC core. It achieves 73.5 dB SINAD at 100 kHz and 70.5 dB at 1.4 MHz with internal reference, supporting true bipolar conversion of AIN+–AIN– over –1.25 V to +1.25 V while maintaining common-mode voltage tolerance from GND to VDD.

Its timing architecture requires precise coordination between CONV rising edge and SCK: conversion completes in 17–18 clock cycles, with 39 ns acquisition time guaranteed; full 2.8 Msps rate demands 50.4 MHz SCK and allows two extra clock cycles between conversions for settling. The 2.5 V reference settles in 2 ms after wake-up from Sleep mode.

Key Specifications

Pinout & Package

Package: 10-lead plastic MSOP (MSE), exposed pad (Pin 11) must be soldered to PCB ground plane for thermal and electrical integrity. θ_JA = 40°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed SAR ADC applications.

Compared with ADS8326IDGSR and MAX1190ETE+, the LTC1403ACMSE-1#TRPBF delivers the highest sampling rate (2.8 Msps) at 3 V with integrated 2.5 V reference and MSOP-10 footprint - making it optimal for portable, space-constrained, and battery-operated systems requiring 14-bit fidelity at >1 MHz bandwidth.

Availability

LTC1403ACMSE-1#TRPBF is available at Aetrix Electronics and suitable for portable data acquisition systems, uninterruptible power supplies, and multiphase motor control applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant tape-and-reel packaging.

Supply support for LTC1403ACMSE-1#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, emphasizing high-performance signal chain components for industrial, instrumentation, and communications markets.

The LTC1403A series belongs to Linear's high-speed SAR ADC product line, engineered specifically for portable, low-power, and space-constrained applications demanding 14-bit resolution at multi-Msps rates with minimal external components.

FAQ

What is the guaranteed sampling rate of the LTC1403ACMSE-1#TRPBF across its operating temperature range?

The LTC1403ACMSE-1#TRPBF guarantees a maximum sampling rate of 2.8 Msps over its full 0°C to 70°C operating temperature range. This specification is validated with VDD = 3 V and applies to both differential and single-ended input configurations. Performance remains stable across temperature due to on-chip trimming of the sample-and-hold and reference circuits, ensuring consistent throughput in portable and industrial environments.

Does the LTC1403ACMSE-1#TRPBF require external components for basic operation?

Yes - the LTC1403ACMSE-1#TRPBF requires at minimum a 10 µF ceramic capacitor from VREF to GND and another 10 µF ceramic capacitor from VDD to GND, both placed close to the device. The exposed pad (Pin 11) must be soldered to a solid ground plane. While functional with only these, optimal dynamic performance (e.g., 73.5 dB SINAD) also benefits from a 0.1 µF ceramic capacitor in parallel with each 10 µF bulk capacitor.

How does the Sleep mode of the LTC1403ACMSE-1#TRPBF reduce power consumption?

The LTC1403ACMSE-1#TRPBF enters Sleep mode via four or more CONV pulses while SCK is held static (high or low), reducing supply current to 2 µA typical (10 µW at 3 V). In this state, the internal reference and analog circuitry are powered down; wake-up occurs on the first SCK edge, with full performance restored after 2 ms for VREF settling. This enables ultra-low-power duty-cycled operation in battery-powered data loggers.

Can the LTC1403ACMSE-1#TRPBF accept an external reference voltage?

Yes - the LTC1403ACMSE-1#TRPBF allows overdriving the internal 2.5 V reference via the VREF pin with an external source between 2.55 V and VDD (≤3.6 V). When used, the external reference sets the full-scale differential input range to ±VREF/2. The internal reference amplifier becomes a follower, drawing up to 3 mA during conversion. This enables system-level scaling alignment without sacrificing accuracy.

What is the absolute maximum analog input voltage range for AIN+ and AIN– on the LTC1403ACMSE-1#TRPBF?

The absolute maximum analog input voltage for AIN+ and AIN– on the LTC1403ACMSE-1#TRPBF is –0.3 V to (VDD + 0.3 V), per Absolute Maximum Ratings. However, for specified linear operation, each input must remain within 0 V to VDD common-mode range while maintaining a differential voltage between –1.25 V and +1.25 V. Exceeding ±1.25 V differential causes code saturation (all zeros or all ones), not damage.