Analog Devices Inc. LTC2355CMSE-14#TRPBF

Overview

LTC2355CMSE-14#TRPBF from Analog Devices (formerly Linear Technology) is a 14-bit, 3.5 Msps serial successive-approximation ADC with differential inputs, 3.3V single-supply operation, and integrated 2.5V bandgap reference. It delivers 74.2 dB SINAD at 100 kHz, achieves 80 dB common-mode rejection, and operates in a compact 10-lead MSOP package - ideal for high-speed portable data acquisition and multiphase motor control systems.

For engineers reviewing the LTC2355CMSE-14#TRPBF datasheet, LTC2355CMSE-14#TRPBF pinout, LTC2355CMSE-14#TRPBF application, or LTC2355CMSE-14#TRPBF equivalent, key selection criteria include its 3.5 Msps sampling rate, 14-bit resolution with no missing codes, 13 µW Sleep mode power, 3-wire SPI-compatible interface, and differential input range of 0 V to 2.5 V referenced to internal VREF.

Technical Context

The LTC2355CMSE-14#TRPBF employs a fully differential sample-and-hold architecture that samples AIN+ and AIN– simultaneously, enabling true differential measurement independent of common-mode voltage (0 V to VDD). Its timing logic synchronizes conversion initiation on the rising edge of CONV and outputs 14-bit data over 16 SCK cycles, supporting full throughput at 63 MHz clock frequency.

It integrates a factory-trimmed 2.5 V internal reference with ±15 ppm/°C tempco and supports external reference 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), rated for 0°C to 70°C operation. 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 LTC2355CMSE-14#TRPBF offers optimal balance of 14-bit resolution, 3.5 Msps throughput, ultra-low Sleep power (13 µW), and integrated 2.5 V reference - making it uniquely suited for portable, battery-sensitive, and space-constrained high-speed data acquisition.

Availability

LTC2355CMSE-14#TRPBF is available at Aetrix Electronics and suitable for communications infrastructure, industrial data acquisition, uninterruptible power supplies, and multiphase motor control applications requiring stable component supply and guaranteed long-term sourcing.

Supply support for LTC2355CMSE-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 family was designed by Linear Technology (acquired by ADI in 2017) specifically for portable and power-sensitive high-speed data acquisition, emphasizing low power, small footprint, and integrated reference functionality in a single-supply SAR ADC.

FAQ

What is the maximum sampling rate of the LTC2355CMSE-14#TRPBF?

The LTC2355CMSE-14#TRPBF achieves a maximum sampling rate of 3.5 Msps under specified conditions: 63 MHz SCK frequency, two additional clock cycles allocated for acquisition between conversions, and VDD = 3.3 V. This rate is validated across the full 0°C to 70°C operating temperature range and enables real-time capture of signals up to ~1.75 MHz bandwidth.

Does the LTC2355CMSE-14#TRPBF require an external reference voltage?

No, the LTC2355CMSE-14#TRPBF includes a factory-trimmed 2.5 V internal bandgap reference (Pin 3, VREF) that supports its full 0 V to 2.5 V differential input range. An external reference can be applied (2.55 V to VDD) to overdrive VREF for improved accuracy or different input spans, but it is not required for basic operation of the LTC2355CMSE-14#TRPBF.

How does the Sleep mode of the LTC2355CMSE-14#TRPBF work?

Sleep mode reduces the LTC2355CMSE-14#TRPBF's supply current to 4 µA (13 µW at 3.3 V) and is entered by applying four or more CONV pulses while SCK remains fixed high or low. Wake-up occurs on the first SCK rising edge, with VREF settling in 2 ms. This mode preserves configuration and enables rapid resumption of conversion without reinitialization of the LTC2355CMSE-14#TRPBF.

What package type and thermal considerations apply to the LTC2355CMSE-14#TRPBF?

The LTC2355CMSE-14#TRPBF uses a 10-lead plastic MSOP (MSE) package with an exposed thermal pad (Pin 11). This pad must be soldered directly to a solid PCB ground plane to ensure proper thermal dissipation (θJA = 40°C/W) and low-noise grounding. Failure to connect the exposed pad degrades both thermal performance and analog accuracy of the LTC2355CMSE-14#TRPBF.

Can the LTC2355CMSE-14#TRPBF interface directly with a 3.3 V microcontroller SPI port?

Yes, the LTC2355CMSE-14#TRPBF features TTL- and 3.3 V CMOS-compatible digital inputs (CONV, SCK) and a three-state SDO output with VOH ≥ 2.5 V and VOL ≤ 0.1 V at 3.3 V - enabling direct connection to standard 3.3 V microcontrollers without level shifters. Its 3-wire SPI-compatible protocol requires only CONV (as chip select), SCK, and SDO, simplifying firmware integration for the LTC2355CMSE-14#TRPBF.