Analog Devices Inc. LTC2311HMSE-14#WPBF

Overview

LTC2311HMSE-14#WPBF from Analog Devices is a 14-bit + sign successive approximation register (SAR) analog-to-digital converter with differential inputs, 5Msps throughput, ±0.75LSB typical INL, 80dB SNR at 2.2MHz, and guaranteed operation from –40°C to 125°C. It integrates a low-drift 4.096V internal reference and supports CMOS or LVDS serial interface - ideal for high-speed automotive data acquisition where wide common-mode range and AEC-Q100 qualification are required.

For engineers reviewing the LTC2311HMSE-14#WPBF datasheet, LTC2311HMSE-14#WPBF pinout, LTC2311HMSE-14#WPBF application, or LTC2311HMSE-14#WPBF equivalent, key selection considerations include its 8V_P-P differential input range, 1-cycle latency, 50mW power dissipation at 5V, 16-lead MSOP package with exposed ground pad, and automotive-grade temperature stability.

Technical Context

The LTC2311HMSE-14#WPBF employs a 15-bit SAR architecture delivering 14-bit + sign resolution with no missing codes, using a differential sample-and-hold front-end and binary-weighted CDAC. Its input stage accepts arbitrary differential signals within 0V to VDD common-mode range while rejecting up to 85dB of common-mode noise at 2.2MHz.

It features dual-reference capability: internally buffered 4.096V (or 2.048V) output with ≤20ppm/°C drift, plus 1.25V buffered REFIN input for external reference override. The configurable CMOS/LVDS serial interface operates with OVDD from 1.71V to 2.5V and supports 105MHz SCK in CMOS mode or 100Ω-differential LVDS signaling.

Key Specifications

Pinout & Package

Package: 16-lead (4mm × 5mm) plastic MSOP with exposed ground pad (Pin 17), lead-free finish, tape-and-reel packaging. Requires soldering of exposed pad 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 AD7960BCPZ-RL7 and MAX11198ETK+, the LTC2311HMSE-14#WPBF uniquely combines AEC-Q100 qualification, integrated 4.096V reference, LVDS/CMOS configurability, and 5V-tolerant analog inputs - making it optimal for automotive and ruggedized industrial signal chains where reliability, integration, and interface flexibility are critical.

Availability

LTC2311HMSE-14#WPBF is available at Aetrix Electronics and suitable for automotive battery management, industrial motor control, optical transceiver diagnostics, and high-speed data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2311HMSE-14#WPBF 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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2311HMSE-14#WPBF belongs to the LTC® precision SAR ADC product line, engineered for high-speed, low-noise data acquisition in harsh environments - emphasizing AEC-Q100 compliance, integrated references, and flexible digital interfaces for automotive and industrial edge sensing.

FAQ

What is the guaranteed operating temperature range for the LTC2311HMSE-14#WPBF?

The LTC2311HMSE-14#WPBF is rated for continuous operation from –40°C to +125°C and is AEC-Q100 qualified for automotive applications. This specification is guaranteed across the full range, with all key parameters - including INL, SNR, and reference drift - tested and characterized per AEC-Q100 stress requirements. The #WPBF suffix explicitly denotes the automotive-grade variant with enhanced reliability screening.

Does the LTC2311HMSE-14#WPBF require an external reference, or does it include an internal one?

The LTC2311HMSE-14#WPBF includes an onboard low-drift (≤20ppm/°C) 4.096V temperature-compensated reference buffer on REFOUT (Pin 3). It also provides a 1.25V buffered REFIN (Pin 2) that can be overdriven to disable the internal reference and accept an external source. No external reference is required for basic operation, though external references may be used for higher accuracy or different voltage scaling.

How does the CMOS/LVDS pin (Pin 10) configure the serial interface on the LTC2311HMSE-14#WPBF?

Pin 10 (CMOS/LVDS) selects the digital interface mode: grounded for CMOS (single-ended SDO+/SCK+), tied to OVDD for LVDS (differential SDO+/SDO– and SCK+/SCK–), or left floating for low-power LVDS. This hardware-selectable configuration avoids firmware dependencies and allows reuse across FPGA platforms with differing I/O standards - all without changing the PCB layout.

What is the significance of "14-bit + sign" resolution in the LTC2311HMSE-14#WPBF?

The "14-bit + sign" designation means the LTC2311HMSE-14#WPBF outputs a 15-bit two's complement code: 14 magnitude bits plus 1 sign bit. This enables true bipolar measurement (e.g., ±4.096V differential range) with seamless zero-crossing detection and no dead zone. The full-scale span is 2 × REFOUT, yielding 32,768 discrete codes - ensuring no missing codes and monotonic behavior across the entire range.

Can the LTC2311HMSE-14#WPBF interface directly with a 5V microcontroller's SPI port?

No - the LTC2311HMSE-14#WPBF requires OVDD between 1.71V and 2.5V for its digital I/O, regardless of whether VDD is 3.3V or 5V. To interface with a 5V microcontroller, a level translator or FPGA I/O bank configured for 1.8V/2.5V signaling is required. The analog inputs (AIN+, AIN–) and CNV pin tolerate 0V to VDD, but the serial interface is strictly low-voltage CMOS or LVDS compliant.