Analog Devices Inc. LTC1403ACMSE-1#PBF

Overview

LTC1403ACMSE-1#PBF 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 80 dB common-mode rejection. It features an internal 2.5V bandgap reference, 3-wire serial interface, and operates in Nap (3 mW) and Sleep (10 µW) shutdown modes - ideal for high-speed portable data acquisition systems.

For engineers reviewing the LTC1403ACMSE-1#PBF datasheet, LTC1403ACMSE-1#PBF pinout, LTC1403ACMSE-1#PBF application, or LTC1403ACMSE-1#PBF equivalent, key selection considerations include its 14-bit resolution with ±0.5 LSB integral linearity, 73.5 dB SINAD at 100 kHz, 50 MHz full-power bandwidth, differential sampling architecture, and MSOP-10 package compatibility with space-constrained mixed-signal designs.

Technical Context

The LTC1403ACMSE-1#PBF implements a fully differential sample-and-hold front-end paired with a successive-approximation register (SAR) ADC core. Its timing logic synchronizes conversion start (CONV↑) with a 16-cycle serial output window aligned to SCK rising edges, enabling deterministic 2.8 Msps throughput when using a 50.4 MHz clock with two extra acquisition cycles between conversions.

It supports both internal (2.5 V, ±15 ppm/°C) and external reference configurations (2.55 V to VDD), with VREF pin overdrive capability. The analog input stage accepts common-mode voltages from GND to VDD while maintaining ±1.25 V differential swing, and achieves 80 dB CMRR up to 1 MHz - critical for rejecting ground-loop noise in multiplexed sensor interfaces.

Key Specifications

Pinout & Package

Package: 10-lead plastic MSOP (MSE), 3 mm × 3 mm × 0.85 mm body, exposed pad (Pin 11) required to be soldered to PCB ground plane for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC1403ACMSE-1#PBF, ADS8326IDRCT trades speed for resolution and lacks integrated shutdown modes, while MAX1190ETE+ offers similar resolution and speed but sacrifices CMRR and ultra-low-power Sleep capability - making LTC1403ACMSE-1#PBF optimal for compact, battery-aware, noise-immune high-speed acquisition.

Availability

LTC1403ACMSE-1#PBF is available at Aetrix Electronics and suitable for data acquisition systems, communications baseband digitization, and uninterruptible power supplies requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for LTC1403ACMSE-1#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 acquired Linear Technology in 2017 and maintains its legacy of high-performance analog ICs, emphasizing precision, speed, and power efficiency in data conversion and signal conditioning.

The LTC1403A-1 product line was designed for portable, high-speed, low-power data acquisition - targeting applications where miniaturization, battery life, and noise immunity are critical, such as handheld test equipment and distributed sensor networks.

FAQ

What is the resolution and effective number of bits (ENOB) of the LTC1403ACMSE-1#PBF?

The LTC1403ACMSE-1#PBF is a guaranteed 14-bit ADC with no missing codes and ±0.5 LSB integral linearity. At 100 kHz input frequency, it achieves 73.5 dB SINAD, corresponding to ~12.3 ENOB. Its 50 MHz full-power bandwidth and 153 µV LSB step size support both high-fidelity AC signal capture and precise DC measurements in the LTC1403ACMSE-1#PBF design.

How does the LTC1403ACMSE-1#PBF handle common-mode noise in industrial environments?

The LTC1403ACMSE-1#PBF achieves 80 dB common-mode rejection ratio (CMRR) at 1 MHz through its fully differential sample-and-hold architecture. This allows it to suppress ground-loop noise and coupled switching noise - critical when interfacing with motor drives or SMPS in industrial settings. The LTC1403ACMSE-1#PBF maintains this CMRR across its 0 V to VDD common-mode input range without requiring external baluns or transformers.

Can the LTC1403ACMSE-1#PBF operate with an external reference, and what are the voltage limits?

Yes, the LTC1403ACMSE-1#PBF supports external reference overdrive on the VREF pin (Pin 3). The external reference must be between 2.55 V and VDD (max 3.6 V) to override the internal 2.5 V bandgap. At 2.55 V, the reference amplifier draws up to 3 mA during conversion. This flexibility allows system-level voltage scaling and improved accuracy when paired with a precision external reference - a capability confirmed for the LTC1403ACMSE-1#PBF in its datasheet specifications.

What are the power consumption modes of the LTC1403ACMSE-1#PBF, and how are they activated?

The LTC1403ACMSE-1#PBF offers three power states: Active (14 mW), Nap (3 mW), and Sleep (10 µW). Nap mode is entered by applying two CONV pulses while SCK is held static (high or low); Sleep mode requires four or more such pulses. Both modes retain register state and allow fast wake-up. These low-power features make the LTC1403ACMSE-1#PBF especially valuable in battery-operated data loggers and wireless sensor nodes where duty cycling is essential.

Is the LTC1403ACMSE-1#PBF pin-compatible with the standard LTC1403-1 series, and what distinguishes the "A" variant?

Yes, the LTC1403ACMSE-1#PBF shares identical pinout, package (MSOP-10), and interface timing with the LTC1403-1 family. The "A" suffix denotes enhanced 14-bit performance: ±0.5 LSB integral linearity (vs ±2 LSB for LTC1403-1), ±2 LSB offset error (vs ±10 LSB), and improved dynamic specs including 73.5 dB SINAD. All electrical and mechanical compatibility is preserved - the LTC1403ACMSE-1#PBF is a drop-in upgrade for designs requiring higher resolution without layout changes.