Analog Devices Inc. LTC2355IMSE-14#TRPBF

Overview

LTC2355IMSE-14#TRPBF from Analog Devices (formerly Linear Technology) is a 14-bit, 3.5 Msps serial successive-approximation ADC with differential inputs, 3.3 V single-supply operation, 80 dB common-mode rejection, and 74.2 dB SINAD at 100 kHz - designed for high-speed portable data acquisition in multiphase motor control and RFID readers.

For engineers reviewing the LTC2355IMSE-14#TRPBF datasheet, LTC2355IMSE-14#TRPBF pinout, LTC2355IMSE-14#TRPBF application, or LTC2355IMSE-14#TRPBF equivalent, key selection criteria include unipolar 0 V to 2.5 V differential input range, 13 µW Sleep mode power, 3-wire SPI-compatible interface timing, and MSOP-10 package thermal performance under industrial temperature conditions (–40°C to +85°C).

Technical Context

The LTC2355IMSE-14#TRPBF implements a fully differential sample-and-hold front-end with 50 MHz full-power bandwidth and 39 ns acquisition time, enabling accurate sampling of fast transient signals. Its internal 2.5 V bandgap reference supports overdrive with external 2.55 V to 3.6 V references, and its timing logic synchronizes conversion start (CONV↑) with 16-cycle SCK-driven serial output.

It features three power states: Active (5.5 mA), Nap (1.1 mA), and Sleep (4 µA), controlled via CONV/SCK pulse sequences. The device maintains 14-bit no-missing-code resolution and ±0.5 LSB integral linearity over –40°C to +85°C, with analog inputs operating from ground to VDD while rejecting common-mode noise up to 100 MHz.

Key Specifications

Pinout & Package

Package: 10-lead plastic MSOP (MSE) with exposed thermal pad (Pin 11), rated for –40°C to +85°C operation. 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 SAR ADC applications.

Compared with ADS8860IDRCT and MAX11198ETE+, the LTC2355IMSE-14#TRPBF uniquely balances 3.5 Msps speed, 74.2 dB SINAD, 13 µW Sleep power, and 2.5 V internal reference - making it optimal for thermally constrained, battery-aware industrial data acquisition where both dynamic performance and low-quiescent power are mandatory.

Availability

LTC2355IMSE-14#TRPBF is available at Aetrix Electronics and suitable for multiphase motor control, RFID reader development, and uninterruptible power supply monitoring requiring stable component supply across industrial temperature ranges.

Supply support for LTC2355IMSE-14#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 series belongs to ADI's precision high-speed SAR ADC product line, engineered for applications demanding simultaneous high resolution, fast throughput, and ultra-low power - especially in portable and thermally limited instrumentation.

FAQ

What is the operating temperature range for the LTC2355IMSE-14#TRPBF?

The LTC2355IMSE-14#TRPBF is specified for industrial operation from –40°C to +85°C. This range is validated across all key parameters including 14-bit resolution, ±0.5 LSB integral linearity, 74.2 dB SINAD, and Sleep mode current (4 µA). The MSOP-10 package with exposed pad ensures thermal stability under continuous 3.5 Msps operation within this envelope.

Does the LTC2355IMSE-14#TRPBF require an external reference voltage?

No - the LTC2355IMSE-14#TRPBF integrates a factory-trimmed 2.5 V bandgap reference (Pin 3, VREF) that supports the full 0 V to 2.5 V unipolar input range. An external reference (2.55 V to VDD) may be applied to overdrive VREF for improved gain accuracy and tempco, but it is optional. Internal reference operation requires only a 10 µF bypass capacitor.

How does the Sleep mode function on the LTC2355IMSE-14#TRPBF?

Sleep mode (13 µW typical) is activated by four or more rising edges on CONV while SCK remains static (high or low). It disables the internal reference and core logic, reducing supply current to 4 µA. Wake-up occurs on the first SCK edge, with 2 ms VREF settling time required before valid conversions - documented in the LTC2355IMSE-14#TRPBF timing specifications.

What is the maximum clock frequency supported for full 3.5 Msps throughput on the LTC2355IMSE-14#TRPBF?

The LTC2355IMSE-14#TRPBF achieves full 3.5 Msps sampling rate with a 63 MHz SCK frequency, provided two additional clock cycles are allocated for acquisition between conversions. Minimum SCK period is 15.872 ns (63 MHz), and timing parameters t7 (45 ns) and tTHROUGHPUT (286 ns) define the strictest constraints for sustained high-speed operation.

Can the LTC2355IMSE-14#TRPBF accept single-ended inputs?

Yes - the LTC2355IMSE-14#TRPBF supports single-ended operation by grounding AIN– (Pin 2) and applying the signal to AIN+ (Pin 1). In this configuration, the 0 V to 2.5 V unipolar input range remains valid, though common-mode rejection and noise immunity are reduced versus true differential use. DC offset error increases slightly (<0.1% of VCM), as confirmed in the device's INL vs. common-mode voltage characterization.