Analog Devices Inc. LTC1403ACMSE#TRPBF

Overview

LTC1403ACMSE#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, and Sleep-mode power consumption of 10 µW. It features 80 dB common-mode rejection, 0 V to 2.5 V unipolar input range, and internal 2.5 V bandgap reference - enabling high-accuracy signal acquisition in portable data acquisition and motor control systems.

For engineers reviewing the LTC1403ACMSE#TRPBF datasheet, LTC1403ACMSE#TRPBF pinout, LTC1403ACMSE#TRPBF application, or LTC1403ACMSE#TRPBF equivalent, key selection criteria include guaranteed 14-bit no-missing-codes performance over 0°C to 70°C, MSOP-10 package compatibility with space-constrained PCB layouts, differential sampling timing integrity at 2.8 Msps, and support for external reference overdrive up to VDD.

Technical Context

The LTC1403ACMSE#TRPBF implements a fully differential sample-and-hold architecture with aperture jitter of 0.3 ps and acquisition time of 39 ns, enabling accurate digitization of fast-changing signals. Its timing logic synchronizes conversion start (CONV↑) with 16-cycle serial output aligned to SCK rising edges, supporting full-rate throughput with a 50.4 MHz clock.

It integrates a factory-trimmed 2.5 V bandgap reference (±15 ppm/°C tempco, 600 µV/V line regulation) that can be overdriven by an external reference from 2.55 V to VDD. The device operates exclusively from a single 3 V supply (2.7 V–3.6 V), drawing 4.7 mA active current and entering Nap (3 mW) or Sleep (10 µW) shutdown modes via CONV pulse sequences.

Key Specifications

Pinout & Package

Package: 10-lead plastic MSOP (MSE) with exposed pad (Pin 11), 3 mm × 3 mm footprint, thermal resistance θ_JA = 40°C/W. Exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8326IDRCT and MAX1190ECM+T, the LTC1403ACMSE#TRPBF delivers superior combination of speed (2.8 Msps), differential noise immunity (80 dB CMRR), and ultra-low Sleep power (10 µW), making it uniquely suited for portable, high-bandwidth, mixed-signal instrumentation where timing fidelity and power budget are co-constrained.

Availability

LTC1403ACMSE#TRPBF is available at Aetrix Electronics and suitable for industrial data acquisition, motor control feedback loops, portable test equipment, and uninterruptible power supply monitoring requiring stable component supply and guaranteed commercial-temperature performance.

Supply support for LTC1403ACMSE#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and signal conditioning.

The LTC1403/LTC1403A family was designed for high-speed, low-power, space-constrained data acquisition in portable and industrial systems - emphasizing differential noise rejection, single-supply simplicity, and robust timing integrity at 2.8 Msps.

FAQ

What is the guaranteed operating temperature range for LTC1403ACMSE#TRPBF?

The LTC1403ACMSE#TRPBF is specified for 0°C to 70°C operation - designated by the 'C' grade suffix in the part number. This commercial temperature range is validated per the Absolute Maximum Ratings table and applies to all DC and AC specifications including INL, SINAD, and CMRR. The device maintains 14-bit no-missing-codes performance across this full range, with typical SINAD of 72 dB at 100 kHz input.

Does LTC1403ACMSE#TRPBF require an external reference, or does it include one?

The LTC1403ACMSE#TRPBF includes a factory-trimmed 2.5 V internal bandgap reference (pin 3, VREF) with ±15 ppm/°C tempco and 600 µV/V line regulation. It is fully functional with only a 10 µF + 0.1 µF bypass capacitor. However, the VREF pin supports external overdrive from 2.55 V to VDD, enabling use with higher-precision references like the LT6655IMS8-3.3 for improved full-scale accuracy.

How does the Sleep mode of LTC1403ACMSE#TRPBF activate, and what is its recovery time?

Sleep mode activates after four or more CONV pulses with SCK held static (high or low). It reduces supply current to 10 µW. Recovery requires one SCK pulse to wake the internal circuitry, followed by 2 ms for the internal reference to settle (t_VREF = 2 ms, Note 14). During this period, conversions are invalid; the first valid result appears after the reference stabilizes and a full CONV–SCK sequence completes.

What is the meaning of "differential input range 0 V to 2.5 V" for LTC1403ACMSE#TRPBF?

This specification means the voltage difference (AIN+ – AIN–) must stay within 0 V to +2.5 V for linear conversion. Both inputs may swing independently from ground to VDD (0 V to 3.6 V), but their difference defines the digitized value. If AIN+ – AIN– exceeds 2.5 V, the output saturates at 0x3FFF (all ones); if below 0 V, it saturates at 0x0000 (all zeros). This enables true differential measurement while rejecting common-mode offsets.

Can LTC1403ACMSE#TRPBF interface directly with a microcontroller GPIO without level-shifting?

Yes - the LTC1403ACMSE#TRPBF uses TTL- and 3 V CMOS-compatible logic levels: VIH = 2.4 V (min at VDD = 3.3 V), VIL = 0.6 V (max at VDD = 2.7 V), VOH = 2.5 V (min), VOL = 0.1 V (max). It interfaces directly with 3 V microcontrollers (e.g., STM32L4, MSP430FRxx) without level shifters. SDO is three-state, allowing bus sharing; SCK and CONV accept standard GPIO drive strength.