Analog Devices Inc. LTC2311HMSE-12#WTRPBF

Overview

LTC2311HMSE-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 guaranteed operation from –40°C to 125°C. It features an integrated 4.096 V temperature-compensated reference (20 ppm/°C max), supports both CMOS and LVDS serial interfaces, and targets high-speed data acquisition in automotive sensor systems.

For engineers reviewing the LTC2311HMSE-12#WTRPBF datasheet, LTC2311HMSE-12#WTRPBF pinout, LTC2311HMSE-12#WTRPBF application, or LTC2311HMSE-12#WTRPBF equivalent, key selection considerations include its AEC-Q100 qualification, wide input common mode range (0 V to VDD), 8 V_P-P differential input span, 1-cycle latency SPI-compatible interface, and dual-mode I/O voltage support (1.8 V to 2.5 V).

Technical Context

The LTC2311HMSE-12#WTRPBF implements a 13-bit SAR architecture delivering 12-bit + sign resolution with no missing codes across its full operating temperature range. Its sampling switch network presents 10 pF input capacitance and ~15 Ω on-resistance, enabling robust acquisition of fully differential, pseudo-differential bipolar/unipolar, or single-ended signals without configuration.

It integrates a low-drift internal reference buffer (4.096 V or 2.048 V selectable via supply), supports external 1.25 V reference injection via REFIN, and provides configurable digital I/O modes (CMOS, LVDS, or low-power LVDS) selected by the CMOS/LVDS pin. Timing is controlled by a TTL-compatible CNV input with one-cycle latency and 5 Msps sustained throughput.

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 AD7960BCPZ-RL7 and MAX11198ETE+T, the LTC2311HMSE-12#WTRPBF uniquely combines AEC-Q100 qualification, LVDS interface capability, and 73 dB SNR in a thermally enhanced MSOP package - making it optimal for automotive and high-noise industrial sampling where interface robustness and temperature resilience are non-negotiable.

Availability

LTC2311HMSE-12#WTRPBF is available at Aetrix Electronics and suitable for automotive sensor systems, high-speed industrial data acquisition, optical network monitoring, and multiphase motor control requiring stable component supply across extended temperature ranges.

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

The LTC2311HMSE-12#WTRPBF belongs to the LTC2311 family of high-speed SAR ADCs designed specifically for demanding automotive and industrial applications requiring precision, speed, and ruggedness in extreme environments.

FAQ

What is the maximum sampling frequency supported by the LTC2311HMSE-12#WTRPBF?

The LTC2311HMSE-12#WTRPBF 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 maintained regardless of interface mode (CMOS or LVDS) and enables accurate digitization of input signals up to 2.2 MHz while preserving 73.3 dB SNR. The 1-cycle latency ensures minimal delay between sampling and data availability for time-critical control loops.

Does the LTC2311HMSE-12#WTRPBF require an external reference voltage?

No, the LTC2311HMSE-12#WTRPBF does not require an external reference voltage because it integrates a low-drift, temperature-compensated 4.096 V (or 2.048 V) reference buffer. However, it supports external reference injection via the REFIN pin - grounding REFIN disables the internal buffer and allows an external 1.25 V source to drive REFOUT. This flexibility enables system-level reference optimization without adding discrete components.

How is the LVDS interface configured on the LTC2311HMSE-12#WTRPBF?

The LVDS interface on the LTC2311HMSE-12#WTRPBF is configured by connecting the CMOS/LVDS pin (Pin 10) to OVDD. In LVDS mode, SDO+ and SDO– (Pins 14, 13) deliver differential serial data, and SCK+ and SCK– (Pins 16, 15) accept a differential clock - both requiring 100 Ω differential termination at the receiver. This configuration provides superior noise immunity compared to CMOS, especially in high-EMI automotive or industrial environments.

What power-saving modes does the LTC2311HMSE-12#WTRPBF offer?

The LTC2311HMSE-12#WTRPBF offers two low-power states: Nap mode draws 2.4 mA (typical) after conversion completion, and Sleep mode draws just 0.1 µA (typical) at 3.3 V. Both modes retain register settings and reference state, allowing rapid wake-up (<10 ms for REFOUT stabilization). These modes reduce average power in burst-sampling applications such as condition monitoring or battery-powered diagnostics without sacrificing startup readiness.

Is the LTC2311HMSE-12#WTRPBF pin-compatible with other variants in the LTC2311 family?

Yes, the LTC2311HMSE-12#WTRPBF shares identical pinout, package (16-lead MSOP), and footprint with all other LTC2311-12 variants including LTC2311CMSE-12#PBF and LTC2311IMSE-12#TRPBF. This allows direct substitution across temperature grades and tape-and-reel configurations without PCB redesign - provided system-level requirements (e.g., AEC-Q100 qualification, extended temperature operation) are verified for the target application.