Analog Devices Inc. LTC2361ITS8#TRMPBF

Overview

LTC2361ITS8#TRMPBF from Analog Devices (acquired Linear Technology) is a 12-bit, 250ksps successive-approximation ADC in an 8-lead TSOT-23 package, operating from a single 2.35V–3.6V supply with 0.75mA typical supply current at full rate and 0.1μA sleep current. It features a dedicated external reference input (VREF), independent digital output supply (OVDD), SPI/MICROWIRE-compatible serial interface, and single-ended analog input (0V to VREF). It is used in portable data acquisition systems requiring low power, compact size, and high-speed sampling without gain stages.

For engineers reviewing the LTC2361ITS8#TRMPBF datasheet, LTC2361ITS8#TRMPBF pinout, LTC2361ITS8#TRMPBF application, or LTC2361ITS8#TRMPBF equivalent, key selection criteria include guaranteed –40°C to +85°C operation, 73dB SNR at 124kHz input, 1.4V–VDD reference range, no data latency, and TSOT-23-8 pin compatibility across the LTC2360/61/62 family.

Technical Context

The LTC2361ITS8#TRMPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, using an internal oscillator to enforce precise 250ksps throughput. Its timing is fully synchronous to the external SCK clock for data readout, with conversion initiated by a rising edge on CONV and data enabled by a falling edge.

It supports flexible voltage domain separation: VREF sets the analog full-scale (1.4V to VDD), OVDD independently configures SDO logic swing (1V to VDD), and VDD powers the core analog circuitry. This enables direct interfacing with 1.8V/2.5V/3V digital systems while maintaining high analog accuracy.

Key Specifications

Pinout & Package

Package: 8-lead plastic TSOT-23 (TS8), 2.9mm × 1.6mm × 0.8mm, exposed pad optional, θ_JA = 250°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822IDR and MAX11166ETE+, the LTC2361ITS8#TRMPBF uniquely combines 250ksps speed, 73dB SNR, –40°C to +85°C qualification, TSOT-23-8 compactness, and full voltage-domain independence (VREF/OVDD/VDD) - making it optimal for space-constrained, multi-voltage, industrial-grade sensor interfaces.

Availability

LTC2361ITS8#TRMPBF is available at Aetrix Electronics and suitable for portable instrumentation, battery-operated sensor nodes, and automotive body electronics requiring stable component supply, extended temperature compliance, and long-term production continuity.

Supply support for LTC2361ITS8#TRMPBF 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 LTC2361ITS8#TRMPBF belongs to ADI's precision SAR ADC product line, designed specifically for ultra-low-power, high-speed, small-footprint data acquisition in portable and energy-sensitive embedded systems.

FAQ

What is the maximum sampling rate of the LTC2361ITS8#TRMPBF?

The LTC2361ITS8#TRMPBF has a maximum sampling rate of 250ksps, as specified in its timing characteristics table. This rate is guaranteed over the full –40°C to +85°C operating temperature range and supports accurate digitization of input signals up to 124kHz with 73dB SINAD performance. The device uses an internal oscillator to maintain this fixed throughput without requiring external clock conditioning.

Does the LTC2361ITS8#TRMPBF require an external reference voltage?

Yes, the LTC2361ITS8#TRMPBF requires an external reference voltage applied to the VREF pin (Pin 2). It supports a reference range of 1.4V to VDD, enabling flexible full-scale adjustment for low-voltage sensor interfaces. Unlike the 6-lead S6 variants, the TS8 package provides dedicated VREF and OVDD pins to decouple analog reference and digital output domains - a key feature of the LTC2361ITS8#TRMPBF.

Can the LTC2361ITS8#TRMPBF interface directly with a 1.8V microcontroller?

Yes, the LTC2361ITS8#TRMPBF can interface directly with a 1.8V microcontroller by setting OVDD (Pin 5) to 1.8V. This configures the SDO output logic levels to meet 1.8V VIH/VIL thresholds, while VDD and VREF remain at higher voltages (e.g., 3.3V and 2.5V) to preserve analog performance. This voltage-domain independence is a defining capability of the LTC2361ITS8#TRMPBF and eliminates the need for external level-shifting circuitry.

What is the sleep current of the LTC2361ITS8#TRMPBF and how is it activated?

The LTC2361ITS8#TRMPBF draws 0.1μA typical supply current in sleep mode, activated automatically when CONV remains high after conversion completion. During sleep, all internal bias currents are shut down and only leakage paths remain active. The device exits sleep on the falling edge of CONV, requiring t_ACQ = 1μs to reacquire the analog input before the next conversion - a critical timing parameter for low-power duty-cycled designs using the LTC2361ITS8#TRMPBF.

Is the LTC2361ITS8#TRMPBF pin-compatible with other members of the LTC2360/61/62 family?

Yes, the LTC2361ITS8#TRMPBF is pin-compatible with the LTC2360ITS8#TRMPBF and LTC2362ITS8#TRMPBF in the TS8 package - all share identical 8-pin TSOT-23 footprints and pin functions (VDD, VREF, GND, AIN, OVDD, SDO, SCK, CONV). This allows hardware reuse across 100ksps/250ksps/500ksps variants without PCB redesign, provided timing and power delivery meet the requirements of the selected speed grade - a key design advantage of the LTC2361ITS8#TRMPBF.