Analog Devices Inc. LTC2311IMSE-14#WTRPBF

Overview

LTC2311IMSE-14#WTRPBF from Analog Devices is a 14-bit + sign differential-input successive approximation register (SAR) ADC with 5Msps throughput, ±0.75LSB typical INL, 80dB SNR at 2.2MHz, and integrated 4.096V temperature-compensated reference. It operates from single 3.3V or 5V supply, supports CMOS/LVDS serial interface, and is qualified for –40°C to 85°C industrial applications including high-speed data acquisition and optical networking.

For engineers reviewing the LTC2311IMSE-14#WTRPBF datasheet, LTC2311IMSE-14#WTRPBF pinout, LTC2311IMSE-14#WTRPBF application, or LTC2311IMSE-14#WTRPBF equivalent, key selection criteria include guaranteed no-missing-codes performance, 1-cycle latency timing, wide input common-mode range (0V to VDD), dual-reference flexibility (internal 4.096V or external 1.25V), and AEC-Q100-compliant variants for automotive-grade designs.

Technical Context

The LTC2311IMSE-14#WTRPBF implements a 15-bit SAR architecture delivering 14-bit + sign resolution with two's complement output coding. Its differential sampling switch network features 10pF input capacitance and 15Ω on-resistance, enabling robust acquisition of fully differential, pseudo-differential bipolar/unipolar, and single-ended signals without configuration.

Timing control uses a single CNV pulse to initiate conversion with one-cycle latency; serial data is clocked out MSB-first on SCK falling edges. The device supports three I/O modes-CMOS (OVDD = 1.8V/2.5V), LVDS (differential 100Ω termination), and low-power LVDS-selected via the CMOS/LVDS pin.

Key Specifications

Pinout & Package

Package: 16-lead (4mm × 5mm) plastic MSOP with exposed pad (Pin 17), RoHS-compliant, tape-and-reel (#WTRPBF).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8860IDRCT and AD7960BCPZ-RL7, the LTC2311IMSE-14#WTRPBF offers optimal balance of speed, integrated reference, dual I/O flexibility, and industrial temperature range-reducing BOM count and layout risk in space-constrained, high-throughput systems.

Availability

LTC2311IMSE-14#WTRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition, optical networking, and multiphase motor control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2311IMSE-14#WTRPBF 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2311-14 product line delivers high-speed, low-noise SAR ADCs optimized for applications demanding precision, low latency, and minimal external components-including test & measurement, medical imaging, and next-generation optical interfaces.

FAQ

What is the guaranteed operating temperature range for LTC2311IMSE-14#WTRPBF?

The LTC2311IMSE-14#WTRPBF is specified for –40°C to +85°C (I-grade). This range is fully tested and guaranteed per datasheet Electrical Characteristics tables, including INL, SNR, and timing parameters. The "I" suffix explicitly denotes industrial temperature qualification, distinct from commercial (C-grade, 0°C to 70°C) or high-temp (H-grade, –40°C to 125°C) variants.

Does LTC2311IMSE-14#WTRPBF require an external reference, or does it include an internal one?

The LTC2311IMSE-14#WTRPBF integrates a low-drift 4.096V temperature-compensated reference buffer (REFOUT) with 20ppm/°C max drift and 0.3% initial accuracy. An external 1.25V reference may be applied via REFIN to override the internal reference, but it is not required-making LTC2311IMSE-14#WTRPBF a self-contained solution for most applications.

How does the CMOS/LVDS pin (Pin 10) configure the serial interface on LTC2311IMSE-14#WTRPBF?

On LTC2311IMSE-14#WTRPBF, Pin 10 (CMOS/LVDS) selects 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 pin directly controls driver topology and current consumption-no register writes or configuration sequences are needed.

What is the minimum acquisition time required before initiating conversion on LTC2311IMSE-14#WTRPBF?

The LTC2311IMSE-14#WTRPBF specifies a minimum acquisition time (t_ACQ) of 28.5ns under all operating conditions. This value is guaranteed over temperature and supply voltage, enabling deterministic timing in high-throughput systems. The CNV pulse width must exceed this duration to ensure full settling of the internal sampling capacitor before conversion begins.

Can LTC2311IMSE-14#WTRPBF digitize single-ended signals, and if so, how?

Yes, LTC2311IMSE-14#WTRPBF supports pseudo-differential single-ended operation: connect the reference point (e.g., system ground or mid-supply) to AIN– and the signal to AIN+, or vice versa. The device automatically handles the common-mode rejection-no configuration is required-and maintains full 14-bit resolution across the unipolar or bipolar span defined by the differential input range.