Analog Devices Inc. LTC2311HMSE-12#PBF

Overview

LTC2311HMSE-12#PBF from Analog Devices (formerly Linear Technology) is a 12-bit + sign successive approximation register (SAR) analog-to-digital converter with differential inputs, 5 Msps throughput, ±0.25 LSB typical INL, 73 dB SNR at 2.2 MHz, and operation over –40°C to +125°C. It integrates a low-drift (20 ppm/°C max) 4.096 V internal reference and supports CMOS or LVDS serial interface - ideal for high-speed data acquisition in harsh-temperature industrial and automotive sensing systems.

For engineers reviewing the LTC2311HMSE-12#PBF datasheet, LTC2311HMSE-12#PBF pinout, LTC2311HMSE-12#PBF application, or LTC2311HMSE-12#PBF equivalent, key selection criteria include guaranteed no-missing-codes performance at 12 bits, wide input common mode range (0 V to VDD), 1-cycle latency timing, and dual-mode I/O compatibility with FPGA or DSP host interfaces.

Technical Context

The LTC2311HMSE-12#PBF implements a 13-bit SAR architecture delivering 12-bit + sign resolution across an 8 V_P-P differential input span (±REFOUT), with sampling initiated by a TTL-compatible CNV pulse and conversion completed in 161.9 ns. Its internal 4.096 V reference is temperature-compensated and can be disabled to accept external 1.25 V buffered reference input via REFIN.

It features configurable digital I/O: grounding CMOS/LVDS pin selects CMOS mode (1.8 V–2.5 V OVDD); tying it to OVDD enables LVDS mode (100 Ω differential termination); floating enables low-power LVDS. SDO and SCK operate single-ended in CMOS mode or differentially in LVDS mode, both synchronized on SCK falling edge with MSB-first output.

Key Specifications

Pinout & Package

Package: 16-lead plastic MSOP (4 mm × 5 mm), exposed pad (Pin 17) required to be soldered to 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 AD7960BCPZ, the LTC2311HMSE-12#PBF uniquely combines 5 Msps speed, integrated 4.096 V reference, CMOS/LVDS flexibility, and H-grade temperature range in a compact 16-lead MSOP - reducing system complexity for ruggedized high-throughput data acquisition.

Availability

LTC2311HMSE-12#PBF is available at Aetrix Electronics and suitable for high-speed motor control, automotive battery monitoring, optical transceiver test, and industrial distributed data acquisition requiring stable component supply across extended temperature ranges.

Supply support for LTC2311HMSE-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 LTC2311HMSE-12#PBF belongs to ADI's legacy Linear Technology high-speed precision SAR ADC family, designed specifically for demanding data acquisition systems requiring speed, accuracy, and robustness in extreme environments.

FAQ

What is the guaranteed operating temperature range for the LTC2311HMSE-12#PBF?

The LTC2311HMSE-12#PBF is rated for continuous operation from –40°C to +125°C, meeting the H-grade specification defined in its Absolute Maximum Ratings table. This qualification is verified across all electrical parameters including INL, SNR, and reference stability, making LTC2311HMSE-12#PBF suitable for under-hood automotive, industrial motor drives, and downhole instrumentation where ambient temperatures exceed 100°C.

Does the LTC2311HMSE-12#PBF require an external reference, or does it include one?

The LTC2311HMSE-12#PBF includes an onboard low-drift (20 ppm/°C max) 4.096 V temperature-compensated reference buffer accessible at REFOUT (Pin 3). It also provides a 1.25 V buffered reference at REFIN (Pin 2) and supports external reference injection by grounding REFIN to disable the internal REFOUT buffer - so LTC2311HMSE-12#PBF operates fully self-contained or with external references as needed.

How does the CMOS/LVDS pin (Pin 10) configure the serial interface of the LTC2311HMSE-12#PBF?

Pin 10 (CMOS/LVDS) configures the digital interface mode: grounded → CMOS mode (single-ended SDO+/SCK+); tied to OVDD → LVDS mode (differential SDO+/SDO–, SCK+/SCK–); left floating → low-power LVDS mode. All modes use SCK falling edge for data capture and support MSB-first 13-bit output - allowing LTC2311HMSE-12#PBF to interface seamlessly with diverse host processors without hardware redesign.

What is the significance of "12-bit + sign" resolution in the LTC2311HMSE-12#PBF?

"12-bit + sign" means the LTC2311HMSE-12#PBF outputs a 13-bit two's complement code representing signed differential input voltage (e.g., –4096 to +4095), delivering true 12-bit effective resolution across the full ±REFOUT span. This enables direct bipolar signal digitization - such as current sense or accelerometer outputs - without external op-amp circuitry, preserving dynamic range and simplifying signal chain design for LTC2311HMSE-12#PBF implementations.

Can the LTC2311HMSE-12#PBF interface with a 1.8 V FPGA I/O bank?

Yes - the LTC2311HMSE-12#PBF supports 1.8 V OVDD operation in CMOS mode, with VIH minimum of 0.8 × OVDD (1.44 V) and VOL maximum of 0.2 × OVDD (0.36 V), ensuring reliable logic-level compatibility with 1.8 V FPGA I/O banks. In LVDS mode, it operates at 2.5 V OVDD with standard 100 Ω differential termination, maintaining signal integrity in high-speed routing scenarios for LTC2311HMSE-12#PBF-based systems.