Analog Devices Inc. LTC2311HMSE-14#PBF

Overview

LTC2311HMSE-14#PBF from Analog Devices (acquired Linear Technology) is a 14-bit + sign successive approximation register (SAR) analog-to-digital converter with differential inputs, 5 Msps throughput, ±0.75 LSB typical INL, 80 dB SNR at 2.2 MHz, and guaranteed operation from –40°C to +125°C. It serves as a high-speed, low-noise front-end digitizer in precision data acquisition systems requiring wide dynamic range and high common-mode rejection.

For engineers reviewing the LTC2311HMSE-14#PBF datasheet, LTC2311HMSE-14#PBF pinout, LTC2311HMSE-14#PBF application, or LTC2311HMSE-14#PBF equivalent, key selection criteria include its 8 V_P-P differential input range, internal 4.096 V temperature-compensated reference (20 ppm/°C max), CMOS/LVDS SPI-compatible interface, 50 mW power dissipation at 5 V, and 16-lead MSOP package with exposed ground pad.

Technical Context

The LTC2311HMSE-14#PBF implements a 15-bit SAR architecture with two-phase operation: acquisition (sample capacitor connected to AIN+/AIN–) followed by conversion (binary-weighted CDAC comparison against REFOUT). Its differential input stage supports arbitrary common-mode voltages from 0 V to VDD while rejecting noise via >85 dB CMRR at 2.2 MHz.

It features dual-reference capability: an internal 4.096 V (or 2.048 V) buffered reference with 20 ppm/°C drift, plus a 1.25 V buffered REFIN pin for external reference injection. The configurable CMOS/LVDS serial interface enables flexible host interfacing - LVDS mode supports 100 Ω differential termination, while CMOS mode operates with 1.8 V to 2.5 V OVDD logic levels.

Key Specifications

Pinout & Package

Package: 16-lead (4 mm × 5 mm) plastic MSOP with exposed thermal pad (Pin 17), lead-free finish. Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.

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 ADS8860IDRCT, the LTC2311HMSE-14#PBF uniquely combines H-grade temperature qualification, integrated 4.096 V reference, LVDS/CMOS interface flexibility, and 5 Msps throughput in a compact MSOP - making it optimal for space-constrained, thermally demanding, and noise-immune industrial and automotive designs.

Availability

LTC2311HMSE-14#PBF is available at Aetrix Electronics and suitable for high-speed data acquisition systems, optical networking monitoring circuits, and automotive motor control applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2311HMSE-14#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, formed through the acquisition of Linear Technology in 2017.

The LTC2311HMSE-14#PBF belongs to ADI's high-speed precision SAR ADC product line, engineered for demanding applications including industrial automation, medical imaging, and communications infrastructure where accuracy, speed, and reliability must coexist under extreme environmental conditions.

FAQ

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

The LTC2311HMSE-14#PBF is rated for continuous operation from –40°C to +125°C, meeting the H-grade specification defined in the datasheet. This makes it suitable for under-hood automotive, industrial motor drives, and aerospace applications where ambient temperatures exceed commercial or industrial grade limits. All electrical specifications in the datasheet labeled with "l" apply across this full range.

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

The LTC2311HMSE-14#PBF includes an internal temperature-compensated reference that outputs either 4.096 V or 2.048 V (selectable via REFIN pin state), with a maximum drift of 20 ppm/°C. An external reference may be used by grounding REFIN to disable the internal buffer and driving REFOUT directly - but the internal reference eliminates the need for external components in most applications.

How does the CMOS/LVDS pin (Pin 10) affect the interface behavior of the LTC2311HMSE-14#PBF?

The CMOS/LVDS pin (Pin 10) configures the serial interface: grounded selects CMOS mode (single-ended SDO+/SCK+), tied to OVDD selects LVDS mode (differential SDO+/SDO– and SCK+/SCK–), and floating enables low-power LVDS mode. This allows the LTC2311HMSE-14#PBF to interface directly with diverse host processors - from low-voltage FPGAs to noise-immune industrial controllers - without external level shifters or translators.

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

The "+ sign" indicates that the LTC2311HMSE-14#PBF outputs 15-bit two's complement codes (1 sign bit + 14 data bits), supporting both positive and negative differential input voltages relative to the common-mode midpoint. This enables true bipolar measurement - e.g., ±4.096 V full-scale - without external op-amp level shifting, simplifying signal chain design for AC-coupled or bidirectional sensors.

Can the LTC2311HMSE-14#PBF operate from a 3.3 V supply, and what are the power implications?

Yes, the LTC2311HMSE-14#PBF operates from a single 3.3 V supply (VDD = 3.13 V to 3.47 V) with full 5 Msps performance. At 3.3 V, power dissipation is 30 mW in CMOS mode and 36 mW in LVDS mode - significantly lower than the 50 mW at 5 V - while maintaining all key AC specs (80.6 dB SNR, ±2 LSB INL). This enables lower thermal load in compact enclosures.