Analog Devices Inc. LTC2356IMSE-14#TRPBF

Overview

LTC2356IMSE-14#TRPBF from Analog Devices (formerly Linear Technology) is a 14-bit, 3.5 Msps serial successive-approximation ADC with differential inputs, single 3.3V supply operation, 74.1 dB SINAD at 1.4 MHz input, and ±1.25 V bipolar input range. It delivers high-speed data acquisition in portable instrumentation and motor control systems where low power and compact size are critical.

For engineers reviewing the LTC2356IMSE-14#TRPBF datasheet, LTC2356IMSE-14#TRPBF pinout, LTC2356IMSE-14#TRPBF application, or LTC2356IMSE-14#TRPBF equivalent, key selection considerations include its 10-lead MSOP package, 80 dB common-mode rejection at 1 MHz, Sleep mode (13 µW), Nap mode (4 mW), and SPI-compatible 3-wire serial interface timing compatibility with standard microcontrollers.

Technical Context

The LTC2356IMSE-14#TRPBF employs a fully differential sample-and-hold architecture that accepts analog inputs from ground to VDD while rejecting common-mode noise up to 100 MHz. Its internal 2.5 V bandgap reference (±15 ppm/°C tempco) supports ±1.25 V differential span and can be overdriven by an external 2.55 V–3.3 V reference.

Conversion is triggered on the rising edge of CONV; output data appears on SDO over 16 clock cycles following that edge. Full 3.5 Msps throughput requires a 63 MHz SCK with two additional clock cycles between conversions for acquisition-enabled by 39 ns sample-and-hold acquisition time and 1 ns aperture delay jitter.

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 ADS8864IDRCT and AD7960BCPZ-RL7, the LTC2356IMSE-14#TRPBF uniquely balances 14-bit precision, 3.5 Msps speed, ultra-low Sleep power (13 µW), and 10-lead MSOP size-making it optimal for space- and energy-constrained embedded control where 12–14 bit ENOB suffices.

Availability

LTC2356IMSE-14#TRPBF is available at Aetrix Electronics and suitable for communications baseband receivers, portable data acquisition systems, uninterruptible power supplies, and multiphase motor control applications requiring stable component supply and long-term production continuity.

Supply support for LTC2356IMSE-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 semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2356 family was designed by Analog Devices' legacy Linear Technology division specifically for high-speed, low-power, differential-input data acquisition in space-constrained and thermally sensitive embedded systems.

FAQ

What is the operating temperature range for the LTC2356IMSE-14#TRPBF?

The LTC2356IMSE-14#TRPBF is rated for –40°C to +85°C industrial temperature operation, as confirmed by its "I" grade marking and Absolute Maximum Ratings table. This range ensures reliable performance in motor drives, outdoor telecom equipment, and industrial PLC modules where ambient temperatures exceed commercial limits. The LTC2356IMSE-14#TRPBF maintains full 14-bit linearity and 74.1 dB SINAD across this range when powered from 3.3 V.

Does the LTC2356IMSE-14#TRPBF require an external reference, or does it have an internal one?

The LTC2356IMSE-14#TRPBF integrates a factory-trimmed 2.5 V bandgap reference with ±15 ppm/°C tempco and 2 mV max drift over temperature. It operates fully functional with only this internal reference, delivering ±1.25 V differential input range. However, Pin 3 (VREF) can be overdriven by an external 2.55 V–3.3 V reference for improved accuracy or stability-no external components are needed to disable the internal reference. The LTC2356IMSE-14#TRPBF datasheet specifies performance with both configurations.

How does the Sleep and Nap shutdown modes work on the LTC2356IMSE-14#TRPBF?

Sleep (13 µW) and Nap (4 mW) modes on the LTC2356IMSE-14#TRPBF are entered via specific CONV pulse sequences while SCK is held static: two CONV pulses activate Nap mode; four pulses activate Sleep mode. Both modes retain register state and reference bias. Wake-up occurs on the first SCK edge, with VREF settling in 2 ms (Sleep) or instantaneously (Nap). The LTC2356IMSE-14#TRPBF supports rapid cycling between active and low-power states without reinitialization.

Can the LTC2356IMSE-14#TRPBF interface directly with a 1.8 V microcontroller SPI port?

No-the LTC2356IMSE-14#TRPBF digital I/O (SCK, CONV, SDO) is specified for 3.3 V operation only, with VIH(min) = 2.4 V and VOL(max) = 0.4 V at 3.1 V VDD. Direct connection to a 1.8 V MCU SPI port would violate input voltage thresholds and risk unreliable communication or damage. Level translation (e.g., TXB0104) or a 3.3 V–compatible MCU is required. The LTC2356IMSE-14#TRPBF does not support dual-supply I/O or voltage-tolerant inputs.

What is the minimum acquisition time required to achieve full 3.5 Msps throughput with the LTC2356IMSE-14#TRPBF?

To sustain 3.5 Msps sampling, the LTC2356IMSE-14#TRPBF requires 39 ns acquisition time plus 17–18 SCK cycles for conversion, totaling a minimum 286 ns sampling period (t_THROUGHPUT). This is achieved using a 63 MHz SCK with two extra clock cycles between conversions-ensuring the 16-bit data stream completes before the next CONV rising edge. The LTC2356IMSE-14#TRPBF timing diagram (TD01b) confirms this sequence is mandatory for rated throughput.