Analog Devices Inc. LTC2356IMSE-12#TRPBF

Overview

LTC2356IMSE-12#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 3.5Msps serial successive-approximation ADC with differential inputs, single 3.3V supply operation, ±1.25V bipolar input range, and 80dB common-mode rejection. It delivers 71.1dB SINAD at 100kHz and draws only 5.5mA active current - enabling high-speed portable data acquisition in space-constrained systems.

For engineers reviewing the LTC2356IMSE-12#TRPBF datasheet, LTC2356IMSE-12#TRPBF pinout, LTC2356IMSE-12#TRPBF application, or LTC2356IMSE-12#TRPBF equivalent, key selection considerations include its 10-lead MSOP package, Sleep mode (13µW), SPI-compatible 3-wire interface, internal 2.5V reference, and differential sampling architecture optimized for noise-immune signal capture in mixed-signal industrial and communications systems.

Technical Context

The LTC2356IMSE-12#TRPBF employs a fully differential sample-and-hold front-end that accepts analog inputs from ground to VDD while rejecting common-mode noise up to 100MHz. Its conversion timing is synchronized to a rising-edge-triggered CONV signal, with output data streamed over 16 SCK cycles following each conversion start.

It supports three power states: Active (5.5mA), Nap (1.1mA), and Sleep (4µA), with VREF settling in 2ms after wake-up. The internal 2.5V bandgap reference is factory-trimmed and can be overdriven by an external 2.55V–3.3V reference, enabling flexible full-scale span adjustment without external components.

Key Specifications

Pinout & Package

Package: 10-lead plastic MSOP (MSE) with exposed pad (Pin 11) - requires soldering to PCB ground plane for thermal and noise 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 AD7980BRMZ, the LTC2356IMSE-12#TRPBF trades resolution for speed and integrated differential front-end - delivering 3.5Msps with on-chip CMRR and reference in a 10-pin MSOP, making it uniquely suited for compact, noise-immune, battery-aware high-speed data acquisition.

Availability

LTC2356IMSE-12#TRPBF is available at Aetrix Electronics and suitable for motor control systems, portable test equipment, uninterruptible power supplies, and multiplexed industrial data acquisition requiring stable component supply across extended temperature ranges.

Supply support for LTC2356IMSE-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 LTC2356 family was designed specifically for high-speed, low-power, differential-input data acquisition in space- and power-constrained embedded systems - emphasizing integration, noise immunity, and ease of layout.

FAQ

What is the operating temperature range for the LTC2356IMSE-12#TRPBF?

The LTC2356IMSE-12#TRPBF is rated for –40°C to +85°C, matching the "I" grade specification. This extended industrial temperature range ensures reliable operation in motor drives, outdoor instrumentation, and industrial PLC environments where ambient temperatures exceed commercial limits. The device maintains full performance specifications-including 71.1dB SINAD and 80dB CMRR-across this entire range.

Does the LTC2356IMSE-12#TRPBF require an external reference voltage?

No, the LTC2356IMSE-12#TRPBF includes a factory-trimmed 2.5V internal bandgap reference with ±15ppm/°C tempco, enabling immediate operation with only VDD and bypass capacitors. However, Pin 3 (VREF) can be overdriven by an external 2.55V–3.3V reference to adjust full-scale range - useful when interfacing with non-standard op-amp gains or precision calibration requirements.

How does the Sleep mode of the LTC2356IMSE-12#TRPBF reduce power consumption?

The LTC2356IMSE-12#TRPBF enters Sleep mode (13µW typical) after four or more CONV pulses with SCK held static, disabling internal clocks and reference buffer. VREF settles in 2ms upon wake-up, and full performance resumes within one conversion cycle. This ultra-low-power state is ideal for duty-cycled sensing applications such as battery-operated condition monitoring nodes where measurements occur infrequently.

Can the LTC2356IMSE-12#TRPBF interface directly with a microcontroller GPIO without dedicated SPI hardware?

Yes, the LTC2356IMSE-12#TRPBF uses a simple 3-wire SPI-compatible interface (CONV, SCK, SDO) with no chip-select line. Its timing allows bit-banged implementation using any MCU with precise GPIO toggle capability - especially valuable in resource-constrained Cortex-M0/M3 designs. The SDO output is three-state, enabling shared bus configurations without additional logic.

What is the significance of the exposed pad (Pin 11) on the LTC2356IMSE-12#TRPBF MSOP package?

The exposed pad (Pin 11) on the LTC2356IMSE-12#TRPBF is electrically and thermally connected to GND. It must be soldered to a solid PCB ground plane to ensure optimal thermal dissipation (θJA = 40°C/W), minimize ground bounce, and preserve 80dB CMRR performance. Leaving it unconnected degrades noise immunity, increases junction temperature, and may cause conversion errors under high-throughput operation.