Analog Devices Inc. LTC1403AIMSE-1#PBF

Overview

LTC1403AIMSE-1#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 2.8 Msps serial analog-to-digital converter with differential inputs, 3V single-supply operation, ±1.25V bipolar input range, and integrated 2.5V bandgap reference. It delivers 73.5 dB SINAD at 100 kHz and supports high-speed portable data acquisition in motor control and communications systems.

For engineers reviewing the LTC1403AIMSE-1#PBF datasheet, LTC1403AIMSE-1#PBF pinout, LTC1403AIMSE-1#PBF application, or LTC1403AIMSE-1#PBF equivalent, key selection criteria include sampling rate vs. power trade-offs (2.8 Msps / 4.7 mA active), differential CMRR (80 dB @ 1 MHz), sleep-mode power (2 µA), and MSOP-10 package compatibility with space-constrained PCB layouts.

Technical Context

The LTC1403AIMSE-1#PBF implements 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. Its internal timing logic synchronizes conversion start (CONV↑) with 16-cycle serial output via SCK, supporting full 2.8 Msps throughput when using a 50.4 MHz clock with two extra acquisition cycles between conversions.

It features dual shutdown modes: Nap mode draws 1.1 mA (3 mW), while Sleep mode consumes only 2 µA (10 µW). The device uses 2's complement serial output on SDO and accepts TTL/3V CMOS-level digital inputs, ensuring interoperability with standard microcontrollers and FPGAs without level-shifting.

Key Specifications

Pinout & Package

Package: 10-lead plastic MSOP (MSE), exposed pad (Pin 11) must be soldered to PCB ground plane for thermal and electrical performance. Pin pitch: 0.5 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed, low-power ADC applications.

Compared with ADS8326IDRCT and MAX1190ECM+T, the LTC1403AIMSE-1#PBF offers the best balance of speed (2.8 Msps), ultra-low sleep power (2 µA), and minimal footprint (MSOP-10), making it optimal for portable, battery-sensitive, space-constrained designs requiring 14-bit fidelity.

Availability

LTC1403AIMSE-1#PBF is available at Aetrix Electronics and suitable for motor control systems, portable test equipment, uninterruptible power supplies, and multiplexed sensor data acquisition requiring stable component supply and guaranteed long-term sourcing.

Supply support for LTC1403AIMSE-1#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 semiconductors, formed through the acquisition of Linear Technology in 2017.

The LTC1403AIMSE-1#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for high-speed, low-power, space-constrained applications in industrial automation, medical instrumentation, and portable electronics.

FAQ

What is the operating temperature range for the LTC1403AIMSE-1#PBF?

The LTC1403AIMSE-1#PBF is rated for –40°C to +85°C industrial temperature operation, as confirmed by its "I" grade marking and ordering information table specifying "–40°C to 85°C" for part numbers with "I" suffix (e.g., LTC1403IMSE-1#PBF and LTC1403AIMSE-1#PBF). This ensures reliable performance in demanding environments such as motor drives and outdoor industrial controllers.

Does the LTC1403AIMSE-1#PBF require an external reference voltage?

No, the LTC1403AIMSE-1#PBF includes an integrated, factory-trimmed 2.5V bandgap reference accessible at Pin 3 (VREF), which supports the standard ±1.25V differential input range. However, VREF can be overdriven with an external reference between 2.55V and VDD to improve accuracy or scale the input range - the internal reference remains disabled when external voltage exceeds its class-A pull-up level.

How does the LTC1403AIMSE-1#PBF enter Sleep mode?

The LTC1403AIMSE-1#PBF enters Sleep mode when four or more CONV pulses are applied while the SCK pin is held in a fixed high or low state. This triggers the lowest-power shutdown state (2 µA), verified in the POWER REQUIREMENTS table under "Sleep Mode (LTC1403A-1)" and illustrated in the Nap/Sleep Mode Waveforms timing diagram (TD02).

What is the significance of the exposed pad (Pin 11) on the LTC1403AIMSE-1#PBF?

The exposed pad (Pin 11) on the LTC1403AIMSE-1#PBF is electrically and thermally connected to GND and must be soldered directly to the PCB's solid analog ground plane. Per the PIN CONFIGURATION section, this is mandatory for achieving specified thermal resistance (θJA = 40°C/W), maintaining 80 dB CMRR, and preventing ground bounce that would degrade dynamic performance.

Can the LTC1403AIMSE-1#PBF interface directly with a 3.3V microcontroller SPI port?

Yes, the LTC1403AIMSE-1#PBF supports direct connection to a 3.3V microcontroller SPI port: its digital inputs (CONV, SCK) accept TTL/3V CMOS logic levels (VIH = 2.4V min, VIL = 0.6V max), and its SDO output drives VOH ≥ 2.5V and VOL ≤ 0.1V under load - all compliant with standard 3.3V SPI signaling without level shifters.