Analog Devices Inc. LTC2311IMSE-12#WTRPBF

Overview

LTC2311IMSE-12#WTRPBF from Analog Devices 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 integrated 4.096 V temperature-compensated reference. It operates from single 3.3 V or 5 V supply, supports CMOS/LVDS serial interface, and targets high-speed data acquisition in automotive-grade industrial systems.

For engineers reviewing the LTC2311IMSE-12#WTRPBF datasheet, LTC2311IMSE-12#WTRPBF pinout, LTC2311IMSE-12#WTRPBF application, or LTC2311IMSE-12#WTRPBF equivalent, key selection criteria include guaranteed no-missing-codes performance, AEC-Q100 qualification for –40°C to 85°C operation, differential input common mode range up to VDD, and dual-mode (CMOS/LVDS) SPI-compatible output with one-cycle latency.

Technical Context

The LTC2311IMSE-12#WTRPBF implements a 13-bit SAR architecture with internal sample-and-hold, delivering true 12-bit resolution plus sign bit in two's complement format. Its differential input stage accepts ±REFOUT full-scale swing (±4.096 V) with 8 V_P-P range and supports arbitrary common mode voltage from 0 V to VDD - enabling direct interfacing with op-amp drivers or transformer-coupled signals without level-shifting.

Conversion is initiated by a TTL-compatible CNV pulse; the resulting 13-bit code is clocked out MSB-first on SDO+ (CMOS) or differentially on SDO+/SDO– (LVDS) with falling-edge capture. Internal reference buffer provides 4.096 V ±20 ppm/°C drift, while REFIN pin allows external 1.25 V reference injection or disabling of REFOUT buffer for external reference use.

Key Specifications

Pinout & Package

Package: 16-lead plastic MSOP (4 mm × 5 mm), exposed pad (Pin 17) soldered to ground plane for thermal and EMI performance.

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 LTC2311IMSE-12#WTRPBF uniquely combines AEC-Q100 qualification, integrated 4.096 V reference, LVDS/CMOS interface flexibility, and guaranteed no-missing-codes performance at 12-bit resolution - making it optimal for automotive and industrial systems needing robust, drop-in-ready high-speed digitization.

Availability

LTC2311IMSE-12#WTRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition systems, automotive sensor interfaces, optical network monitoring, and multiphase motor control requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2311IMSE-12#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 technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC2311-12 product line delivers high-speed, low-noise SAR ADCs optimized for precision data acquisition in harsh environments - designed specifically for applications demanding guaranteed monotonicity, wide common mode range, and automotive reliability.

FAQ

What is the operating temperature range for LTC2311IMSE-12#WTRPBF?

The LTC2311IMSE-12#WTRPBF is rated for –40°C to +85°C operation and is AEC-Q100 qualified for automotive applications. This grade (I-grade) is distinct from the C-grade (0°C to 70°C) and H-grade (–40°C to 125°C) variants. The #W suffix confirms automotive qualification, and the #TRPBF suffix indicates tape-and-reel packaging with 2,500 units per reel.

Does LTC2311IMSE-12#WTRPBF support both CMOS and LVDS digital interfaces?

Yes, LTC2311IMSE-12#WTRPBF supports both CMOS and LVDS serial interfaces via the CMOS/LVDS pin (Pin 10). Grounding this pin selects CMOS mode; tying it to OVDD selects standard LVDS; leaving it floating enables low-power LVDS. The device outputs 13-bit two's complement data MSB-first on SDO+ (CMOS) or differentially on SDO+/SDO– (LVDS), with SCK+/SCK– used in LVDS mode.

What reference options are available for LTC2311IMSE-12#WTRPBF?

LTC2311IMSE-12#WTRPBF integrates a 4.096 V temperature-compensated reference with ≤20 ppm/°C drift. It also provides a buffered 1.25 V output on REFIN (Pin 2) and accepts external reference injection: grounding REFIN disables the internal REFOUT buffer, allowing an external 1.25 V–VDD reference to drive REFOUT directly. External reference mode supports precision calibration workflows.

How does the differential input architecture of LTC2311IMSE-12#WTRPBF handle single-ended signals?

LTC2311IMSE-12#WTRPBF accepts single-ended signals pseudo-differentially - for example, connecting signal to AIN+ and system ground to AIN–. Its wide 0 V to VDD common mode range and 85 dB CMRR reject noise common to both inputs. No configuration is needed; the ADC automatically digitizes the difference (AIN+ – AIN–) and outputs 13-bit two's complement codes, preserving polarity and overrange capability.

What power-saving modes does LTC2311IMSE-12#WTRPBF offer?

LTC2311IMSE-12#WTRPBF offers nap mode (2.4 mA typical at 5 V) after conversion completion and sleep mode (0.1 µA typical at 3.3 V), reducing power during idle periods. Both modes retain register state and reference bias. Wake-up from sleep is instantaneous upon CNV assertion, and REFOUT wake-up time is 10 ms with 10 µF capacitor - enabling rapid resumption of high-speed acquisition.