Analog Devices Inc. LTC2311HMSE-16#TRPBF

Overview

LTC2311HMSE-16#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 5 Msps successive approximation register (SAR) analog-to-digital converter with differential inputs, ±3 LSB typical INL, 81 dB SNR at 2.2 MHz, and guaranteed no missing codes over –40°C to 125°C. It operates from a single 3.3 V or 5 V supply and supports high-speed data acquisition in automotive sensor interfaces and optical networking front-ends.

For engineers reviewing the LTC2311HMSE-16#TRPBF datasheet, LTC2311HMSE-16#TRPBF pinout, LTC2311HMSE-16#TRPBF application, or LTC2311HMSE-16#TRPBF equivalent, key selection considerations include its wide input common mode range (0 V to VDD), dual-mode CMOS/LVDS serial interface, integrated 4.096 V reference with 20 ppm/°C drift, 1-cycle latency, and MSOP-16 package with exposed thermal pad.

Technical Context

The LTC2311HMSE-16#TRPBF implements a fully differential SAR architecture with internal sample-and-hold, 16-bit CDAC, and differential comparator. Its input stage accepts ±REFOUT differential voltage (up to 8 V_P-P) while supporting common mode voltages from 0 V to VDD - enabling direct interfacing with unbuffered op-amp outputs or transformer-coupled signals without level-shifting.

It features configurable digital I/O: CMOS mode (OVDD = 1.8 V/2.5 V), LVDS mode (differential SCK/SDO, 100 Ω termination), or low-power LVDS via floating CMOS/LVDS pin. Conversion is initiated by a TTL-compatible CNV pulse, and output data is clocked out MSB-first on SCK falling edges with one-cycle latency - critical for real-time control loops and synchronized multi-channel sampling.

Key Specifications

Pinout & Package

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

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 ADS8860IRGET, the LTC2311HMSE-16#TRPBF uniquely combines automotive-grade temperature operation, hardware-configurable LVDS/CMOS I/O, and integrated low-drift reference - making it optimal for noise-sensitive, high-reliability embedded systems requiring deterministic timing and minimal external components.

Availability

LTC2311HMSE-16#TRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition systems, optical networking monitoring, and automotive sensor interfaces requiring stable component supply across extended temperature ranges.

Supply support for LTC2311HMSE-16#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2311HMSE-16#TRPBF belongs to ADI's high-speed precision SAR ADC product line, designed specifically for applications demanding high throughput, excellent AC performance, and robust operation in harsh thermal environments - including motor control, instrumentation, and aerospace subsystems.

FAQ

What is the maximum sampling frequency of the LTC2311HMSE-16#TRPBF?

The LTC2311HMSE-16#TRPBF supports a maximum sampling frequency of 5 Msps, with guaranteed timing performance across its full –40°C to +125°C operating range. This rate is achievable in both CMOS and LVDS I/O modes, and the device maintains 81.6 dB SNR and ±3 LSB INL typical at this throughput - making it suitable for demanding real-time signal capture applications such as optical network monitoring and motor current sensing.

Does the LTC2311HMSE-16#TRPBF require an external reference?

No, the LTC2311HMSE-16#TRPBF integrates a low-drift, temperature-compensated 4.096 V reference buffer with 20 ppm/°C max drift, eliminating the need for an external reference in most applications. However, it also provides a 1.25 V buffered REFIN pin and supports external reference injection into REFOUT when REFIN is grounded - offering flexibility for systems requiring custom reference voltages or enhanced accuracy via ultra-stable external sources.

How does the CMOS/LVDS pin (Pin 10) configure the serial interface of the LTC2311HMSE-16#TRPBF?

The CMOS/LVDS pin (Pin 10) selects the physical layer of the serial interface: grounding enables CMOS mode (single-ended SDO+/SCK+), tying to OVDD enables standard LVDS mode (differential SDO+/SDO–, SCK+/SCK–), and leaving it floating activates low-power LVDS mode. This hardware-selectable configuration avoids firmware dependencies and allows board-level optimization for noise immunity (LVDS) or power efficiency (CMOS) without redesigning the digital interface.

What is the purpose of the exposed thermal pad (Pin 17) on the LTC2311HMSE-16#TRPBF?

The exposed thermal pad (Pin 17) on the LTC2311HMSE-16#TRPBF serves as both a thermal dissipation path and an additional ground connection. It must be soldered directly to a solid PCB ground plane to maintain junction temperature within limits (θ_JA = 40°C/W) and reduce EMI susceptibility. Failure to connect this pad risks thermal shutdown during sustained 5 Msps operation and degrades SNR performance due to increased ground bounce and noise coupling.

Can the LTC2311HMSE-16#TRPBF interface directly with a 1.8 V FPGA I/O bank?

Yes, the LTC2311HMSE-16#TRPBF supports 1.8 V I/O through its OVDD supply (Pin 12), which accepts 1.71 V to 2.5 V. When OVDD = 1.8 V and CMOS mode is selected, SDO+ and SCK+ operate at 1.8 V logic levels - enabling direct, level-matched connection to 1.8 V FPGA I/O banks without external translators. In LVDS mode, the same OVDD setting configures the LVDS driver compliance, ensuring compatibility with standard 2.5 V LVDS receivers via proper termination.