Analog Devices Inc. LTC2365CTS8#TRPBF

Overview

LTC2365CTS8#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 1 Msps successive-approximation analog-to-digital converter (SAR ADC) in an 8-lead TSOT-23 package. It operates from a single 2.35V–3.6V supply, draws only 2 mA at full speed, delivers 73 dB SNR and 72.8 dB SINAD at 1 MHz input, and supports external reference (1.4V–VDD) and independent digital output supply (1V–VDD). It is used in battery-powered data acquisition systems requiring high resolution, low power, and compact size.

For engineers reviewing the LTC2365CTS8#TRPBF datasheet, LTC2365CTS8#TRPBF pinout, LTC2365CTS8#TRPBF application, or LTC2365CTS8#TRPBF equivalent, key selection criteria include its 1 Msps sampling rate with no latency, sleep mode (0.1 µA), TSOT-23-8 package compatibility with space-constrained PCBs, and support for reduced input spans down to 1.4 V full-scale without gain stages.

Technical Context

The LTC2365CTS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, enabling precise single-ended analog input sampling referenced to GND. Its serial interface uses SPI/MICROWIRE-compatible 3-wire timing (CS, SCK, SDO), with data output framed by two leading and two trailing zeros, MSB-first, and SDO controlled by OVDD for level-shifting interoperability.

It features dedicated VREF and OVDD pins-unlike the 6-lead S6 variant-allowing independent scaling of analog input range (0 V to VREF) and digital output swing (1 V to VDD). This enables direct sensor interfacing and seamless integration into mixed-voltage systems (e.g., 1.8 V logic with 3 V analog rails), while maintaining guaranteed operation from 0°C to 70°C.

Key Specifications

Pinout & Package

Package: 8-lead plastic TSOT-23 (0.65 mm pitch, 2.9 mm × 1.6 mm footprint), moisture sensitivity level 1, RoHS-compliant, tape-and-reel (TRPBF = 2500-piece reel).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit SAR ADC applications.

Compared with ADS7822U and MAX11100ETE+, the LTC2365CTS8#TRPBF uniquely combines 1 MSPS throughput, 0.1 µA sleep current, 1.4 V minimum VREF, and OVDD-based level shifting - making it optimal for compact, multi-voltage, battery-operated sensing nodes where power, size, and analog flexibility are co-critical.

Availability

LTC2365CTS8#TRPBF is available at Aetrix Electronics and suitable for handheld terminal interface, portable medical sensor acquisition, and automotive cabin monitoring requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for LTC2365CTS8#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 LTC2365CTS8#TRPBF belongs to ADI's legacy Linear Technology precision SAR ADC product line, designed specifically for low-power, high-speed, space-constrained data acquisition in portable and embedded systems.

FAQ

What is the maximum sampling rate supported by the LTC2365CTS8#TRPBF?

The LTC2365CTS8#TRPBF supports a maximum sampling rate of 1 Msps, verified across the full 0°C to 70°C operating temperature range. This rate is achieved using a maximum SCK frequency of 16 MHz and requires ≥14 SCK cycles per conversion. At this rate, the device consumes 2 mA from a 3 V supply and delivers 72.8 dB SINAD at a 1 MHz input tone.

Does the LTC2365CTS8#TRPBF require an external reference voltage?

Yes, the LTC2365CTS8#TRPBF requires an external reference voltage applied to the VREF pin. The VREF range is 1.4 V to VDD (2.35 V–3.6 V), and it directly defines the full-scale analog input range (0 V to VREF). Unlike internal-reference-only ADCs, this architecture enables precise scaling for low-output sensors without additional amplification stages.

Can the LTC2365CTS8#TRPBF interface with a 1.8 V microcontroller?

Yes, the LTC2365CTS8#TRPBF can interface directly with a 1.8 V microcontroller using its OVDD pin. By supplying 1.8 V to OVDD, the SDO output swing is constrained to 0 V–1.8 V, ensuring compatible logic levels without external level shifters. The SDO remains three-state and Hi-Z when CS is high, preventing bus contention.

What is the purpose of the two leading and trailing zeros in the LTC2365CTS8#TRPBF serial output format?

The LTC2365CTS8#TRPBF serial output format consists of two leading zeros, 12 bits of conversion data (MSB first), and two trailing zeros - totaling 16 bits. This structure provides timing margin for synchronization, simplifies bit alignment in firmware (e.g., right-shifting by 2 bits yields clean 12-bit result), and maintains consistent frame length regardless of input value, aiding deterministic interrupt handling.

How does the sleep mode function in the LTC2365CTS8#TRPBF?

Sleep mode in the LTC2365CTS8#TRPBF is activated automatically when CS remains high and SCK is held static (0 V or VDD). In this state, supply current drops to 0.1 µA typical, reducing power by >20,000× versus active operation. Wake-up occurs on the next CS falling edge, with full conversion capability restored within 333 ns - enabling rapid response in event-driven sensing applications.