Analog Devices Inc. LTC2311CMSE-14#TRPBF

Overview

LTC2311CMSE-14#TRPBF from Analog Devices (formerly 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 integrated 4.096 V temperature-compensated reference. It operates from a single 3.3 V or 5 V supply and delivers wide input common mode range (0 V to VDD) for high common-mode rejection in precision data acquisition systems.

For engineers reviewing the LTC2311CMSE-14#TRPBF datasheet, LTC2311CMSE-14#TRPBF pinout, LTC2311CMSE-14#TRPBF application, or LTC2311CMSE-14#TRPBF equivalent, key selection criteria include guaranteed 14-bit no-missing-codes performance, CMOS/LVDS configurable serial interface, 1-cycle latency timing, low-power nap/sleep modes (down to 0.5 µW), and operation across 0°C to 70°C industrial temperature range in MSOP package.

Technical Context

The LTC2311CMSE-14#TRPBF employs a 15-bit SAR architecture with internal CDAC and differential comparator, sampling the AIN+/AIN– voltage difference during acquisition and performing binary-weighted successive approximation against REFOUT (±REFOUT full-scale span). Its timing logic ensures one-cycle latency: CNV falling edge initiates conversion, and result is available on SDO at next SCK falling edge.

It supports dual I/O modes via CMOS/LVDS pin: grounded for CMOS (1.8 V/2.5 V OVDD), tied to OVDD for LVDS (100 Ω differential termination), or floating for low-power LVDS. Internal reference buffer provides 4.096 V (±20 ppm/°C max drift) or 2.048 V, with external 1.25 V REFIN option and buffered REFIN output.

Key Specifications

Pinout & Package

Package: 16-lead (4 mm × 5 mm) plastic MSOP with exposed pad (Pin 17), lead-free finish, tape-and-reel packaging (#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 ADS8860IDRCT, the LTC2311CMSE-14#TRPBF uniquely balances 14-bit precision, 5 Msps throughput, integrated reference, and LVDS/CMOS flexibility in a compact MSOP-making it optimal for space-constrained, high-speed industrial and telecom systems requiring minimal external components.

Availability

LTC2311CMSE-14#TRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition systems, optical networking monitoring equipment, and automotive battery management units requiring stable component supply with guaranteed 0°C to 70°C operation and RoHS-compliant packaging.

Supply support for LTC2311CMSE-14#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 technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC2311-14 product line was developed by Linear Technology (acquired by ADI in 2017) to deliver high-speed, low-noise SAR ADCs with integrated references and flexible digital interfaces for demanding instrumentation and real-time control applications.

FAQ

What is the guaranteed operating temperature range for the LTC2311CMSE-14#TRPBF?

The LTC2311CMSE-14#TRPBF is specified for 0°C to 70°C operation (C-grade). This is confirmed in the "ORDER INFORMATION" table where "LTC2311CMSE-14#TRPBF" is explicitly listed with "0°C to 70°C" temperature range. The device maintains all electrical specifications-including ±2 LSB INL and 80 dB SNR-across this full industrial temperature span without derating.

Does the LTC2311CMSE-14#TRPBF require an external reference, or does it include an internal one?

The LTC2311CMSE-14#TRPBF includes an internal temperature-compensated reference buffer that outputs either 4.096 V or 2.048 V (selectable via REFIN connection), with max drift of 20 ppm/°C. An external 1.25 V reference may be applied via REFIN, and grounding REFIN disables the internal REFOUT buffer-allowing direct drive of REFOUT with an external reference. No external reference is required for standard operation.

How does the CMOS/LVDS pin (Pin 10) configure the serial interface on the LTC2311CMSE-14#TRPBF?

On the LTC2311CMSE-14#TRPBF, Pin 10 (CMOS/LVDS) selects the serial 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 mode. This hardware-selectable configuration avoids firmware dependencies and enables interoperability with both FPGA LVDS receivers and microcontroller SPI peripherals without external level shifters.

What is the minimum SCK period supported by the LTC2311CMSE-14#TRPBF, and what maximum clock frequency does that enable?

The LTC2311CMSE-14#TRPBF specifies a minimum SCK period (t_SCK) of 9.4 ns, enabling a maximum SCK frequency of approximately 106.4 MHz. This is confirmed in the "ADC TIMING CHARACTERISTICS" table and Note 13, which states "t_SCK of 9.4 ns minimum allows a shift clock frequency up to 105 MHz for falling edge capture." The fast clock supports high-throughput streaming at 5 Msps with minimal interface overhead.

Can the LTC2311CMSE-14#TRPBF digitize single-ended signals, and if so, how is that achieved?

Yes, the LTC2311CMSE-14#TRPBF can digitize single-ended signals using pseudo-differential configurations: connect the reference (e.g., ground or mid-rail) to AIN– and the signal to AIN+, enabling unipolar (0 to REFOUT) or bipolar (–REFOUT/2 to +REFOUT/2) spans. No configuration or mode setting is required-the ADC automatically adapts based on input voltage relationships, leveraging its wide 0 V to VDD common mode range and high CMRR (>85 dB) for effective noise rejection.