Analog Devices Inc. LTC2356IMSE-12#PBF

Overview

LTC2356IMSE-12#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 3.5 Msps serial analog-to-digital converter with differential inputs, single 3.3V supply operation, ±1.25V bipolar input range, and 80 dB common-mode rejection. It delivers 71.1 dB SINAD at 100 kHz and draws only 5.5 mA active current, making it suitable for high-speed portable data acquisition systems requiring low power and compact size.

For engineers reviewing the LTC2356IMSE-12#PBF datasheet, LTC2356IMSE-12#PBF pinout, LTC2356IMSE-12#PBF application, or LTC2356IMSE-12#PBF equivalent, key selection considerations include its 10-lead MSOP package, Sleep mode (13 µW), Nap mode (4 mW), SPI-compatible 3-wire interface, and differential sampling architecture optimized for noise-immune signal capture in mixed-signal industrial and communications systems.

Technical Context

The LTC2356IMSE-12#PBF employs a fully differential sample-and-hold front-end with aperture jitter of 0.3 ps and acquisition time of 39 ns, enabling accurate digitization of fast-changing signals up to 50 MHz full-power bandwidth. Its internal 2.5 V bandgap reference (±15 ppm/°C tempco) supports bipolar input conversion without external components, while the 3-wire serial interface outputs 12-bit 2's complement data over 16 clock cycles following each CONV rising edge.

Operation is defined across –40°C to +85°C, with absolute input voltage range from GND to VDD on AIN+ and AIN–, and robust digital I/O specifications including VIH ≥ 2.4 V and VOL ≤ 0.10 V at 160 µA sink. The device supports three power states-Active (5.5 mA), Nap (1.1 mA), and Sleep (4 µA)-with mode transitions controlled via CONV pulse sequences and SCK state.

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 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 AD7980BRMZ, the LTC2356IMSE-12#PBF uniquely combines 3.5 Msps throughput, true differential input architecture, integrated reference, and ultra-low Sleep-mode power in a 10-lead MSOP-making it optimal for portable, noise-prone, high-sample-rate systems where size and power are constrained.

Availability

LTC2356IMSE-12#PBF is available at Aetrix Electronics and suitable for communications baseband processing, industrial data acquisition systems, and uninterruptible power supplies requiring stable component supply, extended temperature support (–40°C to +85°C), and long-term production continuity.

Supply support for LTC2356IMSE-12#PBF 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 LTC2356IMSE-12#PBF belongs to ADI's high-speed precision SAR ADC product line, designed specifically for applications demanding low power, small footprint, and robust noise immunity in portable and distributed sensing systems.

FAQ

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

The LTC2356IMSE-12#PBF is rated for industrial operation from –40°C to +85°C, as indicated by the "I" grade in the part number. This range is validated across all key specifications including SINAD, INL, offset error, and power consumption, ensuring reliable performance in harsh environmental conditions encountered in motor control, UPS, and field-deployed instrumentation.

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

No-the LTC2356IMSE-12#PBF includes a factory-trimmed 2.5 V internal bandgap reference with ±15 ppm/°C tempco, sufficient for standard ±1.25 V bipolar input spans. An external reference (2.55 V to VDD) may be applied to Pin 3 (VREF) only if tighter initial accuracy, lower drift, or system-level reference synchronization is required.

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

The LTC2356IMSE-12#PBF enters Sleep mode (4 µA typical) after four or more CONV pulses with SCK held static, disabling the internal reference, ADC core, and digital logic. Wake-up occurs on the first SCK edge, with VREF settling in 2 ms-enabling rapid resumption of sampling with minimal latency penalty in duty-cycled applications.

Can the LTC2356IMSE-12#PBF interface directly with a microcontroller SPI port?

Yes-the LTC2356IMSE-12#PBF uses a 3-wire SPI-compatible interface (CONV, SCK, SDO) with TTL/CMOS logic levels and no CS pin required. Data is output on SDO in 2's complement format over 16 clock cycles following each CONV rising edge, aligning with standard SPI timing expectations for straightforward firmware integration.

What is the significance of the 80 dB common-mode rejection ratio in the LTC2356IMSE-12#PBF?

The 80 dB CMRR at 1 MHz means the LTC2356IMSE-12#PBF attenuates common-mode interference-such as ground bounce, EMI, or coupled noise-by a factor of 10,000× relative to the differential signal. This enables accurate measurement of small differential signals (e.g., shunt voltage) in electrically noisy environments without additional isolation or filtering circuitry.