Analog Devices Inc. LTC2355CMSE-12#TRPBF

Overview

LTC2355CMSE-12#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 3.5 Msps serial successive-approximation ADC with differential inputs, 3.3 V single-supply operation, and integrated 2.5 V bandgap reference. It delivers 71.1 dB SINAD at 100 kHz, 80 dB common-mode rejection, and operates in a 10-lead MSOP package rated for 0°C to 70°C. It targets high-speed portable data acquisition where low power and compact size are critical.

For engineers reviewing the LTC2355CMSE-12#TRPBF datasheet, LTC2355CMSE-12#TRPBF pinout, LTC2355CMSE-12#TRPBF application, or LTC2355CMSE-12#TRPBF equivalent, key selection criteria include its 3.5 Msps sampling rate with 39 ns acquisition time, 13 µW Sleep mode power, SPI-compatible 3-wire interface timing, and differential input range of 0 V to 2.5 V referenced to internal VREF.

Technical Context

The LTC2355CMSE-12#TRPBF employs a fully differential sample-and-hold front-end paired with a 12-bit SAR core, enabling true differential measurement independent of common-mode voltage (0 V to VDD). Its timing logic synchronizes conversion start (CONV↑) with a 16-cycle SCK-driven serial output, supporting full 3.5 Msps throughput when two extra clock cycles are allocated between conversions.

It integrates a factory-trimmed 2.5 V bandgap reference with ±15 ppm/°C tempco and supports external overdrive (2.55 V to VDD). Power management includes Nap mode (4 mW) and Sleep mode (13 µW), both entered via specific CONV pulse sequences without requiring SCK activity.

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.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8860IDRCT and AD7476ARTZ-REEL7, the LTC2355CMSE-12#TRPBF uniquely combines 3.5 Msps speed, integrated 2.5 V reference, differential inputs, and ultra-low Sleep power-making it optimal for portable, high-throughput, noise-immune acquisition where board space and battery life are constrained.

Availability

LTC2355CMSE-12#TRPBF is available at Aetrix Electronics and suitable for communications infrastructure, portable test equipment, and uninterruptible power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LTC2355CMSE-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 technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC2355 family was designed by Linear Technology (acquired by ADI in 2017) specifically for portable, high-speed data acquisition systems demanding low power, small footprint, and robust noise immunity in single-supply environments.

FAQ

What is the maximum sampling rate achievable with LTC2355CMSE-12#TRPBF, and what clock frequency is required?

The LTC2355CMSE-12#TRPBF achieves a maximum sampling rate of 3.5 Msps. This requires a minimum SCK frequency of 63 MHz and allocation of two additional clock cycles between consecutive conversions to accommodate acquisition time. At lower SCK frequencies or without the inter-conversion gap, the effective throughput decreases proportionally.

Does LTC2355CMSE-12#TRPBF support differential input signals, and what is its common-mode rejection performance?

Yes, LTC2355CMSE-12#TRPBF features fully differential analog inputs (AIN+ and AIN–) that accept 0 V to 2.5 V differential voltage swings with 0 V to VDD common-mode range. Its analog input common-mode rejection ratio is 80 dB at 1 MHz, enabling effective suppression of ground-loop noise and interference in industrial sensor interfaces.

Can the internal reference of LTC2355CMSE-12#TRPBF be overdriven, and what voltage range is acceptable?

Yes, the internal 2.5 V reference (VREF pin) of LTC2355CMSE-12#TRPBF can be overdriven by an external reference source. The acceptable external reference voltage range is 2.55 V to VDD (3.3 V), ensuring compatibility with precision external references while maintaining specified accuracy and stability.

What are the power-down modes supported by LTC2355CMSE-12#TRPBF, and how are they activated?

LTC2355CMSE-12#TRPBF supports Nap mode (4 mW) and Sleep mode (13 µW). Nap mode is entered with two rising edges on CONV without intervening SCK edges; Sleep mode requires four or more such CONV pulses. Both modes retain register state and resume operation on next valid SCK or CONV edge, with VREF settling in 2 ms after Sleep wake-up.

What package type and thermal characteristics apply to LTC2355CMSE-12#TRPBF?

LTC2355CMSE-12#TRPBF uses a 10-lead plastic MSOP (MSE) package with exposed thermal pad (Pin 11). Its junction-to-ambient thermal resistance is θ_JA = 40°C/W, and maximum junction temperature is 125°C. The exposed pad must be soldered to a solid PCB ground plane for proper thermal and electrical performance.