Analog Devices Inc. LTC2355IMSE-12#TRPBF

Overview

LTC2355IMSE-12#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 3.5 Msps serial successive-approximation ADC with differential inputs, single 3.3V supply operation, and 80 dB common-mode rejection. It delivers 71.1 dB SINAD at 100 kHz input, consumes only 5.5 mA active current (18 mW), and features Sleep mode (13 µW) for portable high-speed data acquisition.

For engineers reviewing the LTC2355IMSE-12#TRPBF datasheet, LTC2355IMSE-12#TRPBF pinout, LTC2355IMSE-12#TRPBF application, or LTC2355IMSE-12#TRPBF equivalent, key selection criteria include its 3.5 Msps sampling rate, 0 V to 2.5 V unipolar differential input range, 3-wire SPI-compatible interface, MSOP-10 package with exposed pad, and dual shutdown modes (Nap/ Sleep) for dynamic power management in battery-sensitive systems.

Technical Context

The LTC2355IMSE-12#TRPBF employs a fully differential sample-and-hold architecture with 39 ns acquisition time and 1 ns aperture delay jitter (0.3 ps typical), enabling accurate high-frequency signal capture. Its internal 2.5 V bandgap reference (±15 ppm/°C tempco) supports unipolar conversion of AIN+–AIN– differences while rejecting common-mode noise up to 100 MHz.

Timing is controlled via external SCK and CONV signals: conversion starts on CONV rising edge, and 16-bit serial output (MSB-first, 12-bit valid + 4 LSBs ignored) is clocked out over 16 SCK cycles. Full 3.5 Msps throughput requires 63 MHz SCK and allows 2-cycle acquisition gap between conversions.

Key Specifications

Pinout & Package

Package: 10-lead plastic MSOP (MSE) with exposed pad (Pin 11), θ_JA = 40°C/W, TJ_MAX = 125°C. Exposed pad must 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 SAR ADC applications.

Compared with ADS8860IDRCT and AD7960BCPZ-RL7, the LTC2355IMSE-12#TRPBF uniquely balances 3.5 Msps throughput, 12-bit precision, ultra-low Sleep power (13 µW), and single-supply 3.3 V operation in a compact MSOP-10 - making it optimal for portable, thermally constrained, and cost-sensitive high-speed DAQ designs.

Availability

LTC2355IMSE-12#TRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition systems, uninterruptible power supplies, and multiphase motor control applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for LTC2355IMSE-12#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2355 family was designed specifically for portable, power-sensitive, high-speed data acquisition where differential input integrity, low latency, and minimal board space are critical - targeting applications from battery-powered test equipment to real-time motor controllers.

FAQ

What is the maximum sampling rate of the LTC2355IMSE-12#TRPBF and what clock frequency is required?

The LTC2355IMSE-12#TRPBF achieves a maximum sampling rate of 3.5 Msps. To sustain this rate, a 63 MHz SCK clock is required, allowing two additional clock cycles between conversions for acquisition. At lower rates, SCK may be reduced, but minimum SCK period remains 15.872 ns to maintain specified analog performance.

Does the LTC2355IMSE-12#TRPBF require an external reference voltage?

No, the LTC2355IMSE-12#TRPBF includes a factory-trimmed 2.5 V internal bandgap reference with ±15 ppm/°C tempco. The VREF pin (Pin 3) must be bypassed with ≥10 µF capacitance to GND. An external reference (2.55 V to VDD) may overdrive VREF for improved accuracy or temperature stability, but is not required.

How does the Sleep mode of the LTC2355IMSE-12#TRPBF reduce power consumption?

The LTC2355IMSE-12#TRPBF enters Sleep mode after four CONV pulses with SCK held static, reducing supply current to 4 µA (13 µW at 3.3 V). In Sleep mode, the internal reference and analog core are powered down; wake-up occurs on the first SCK rising edge, with 2 ms VREF settling time before valid conversions resume.

What is the analog input voltage range specification for the LTC2355IMSE-12#TRPBF?

The LTC2355IMSE-12#TRPBF accepts a differential input range of 0 V to 2.5 V (AIN+ – AIN–) when using the internal reference. Both AIN+ and AIN– may swing from 0 V to VDD (3.3 V) in common mode. Input voltages outside –0.3 V to (VDD + 0.3 V) risk damage per absolute maximum ratings.

Can the LTC2355IMSE-12#TRPBF interface directly with a microcontroller SPI port?

Yes, the LTC2355IMSE-12#TRPBF uses a 3-wire SPI-compatible interface (SCK, CONV, SDO) with no chip-select pin. CONV replaces CS functionality. SDO is three-state and goes Hi-Z when CONV is low, enabling shared bus operation. It supports standard SPI clock polarity/phase (CPOL=0, CPHA=0) and TTL/3.3 V CMOS logic levels.