Analog Devices Inc. LTC2361CTS8#TRMPBF

Overview

LTC2361CTS8#TRMPBF from Analog Devices (formerly 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 dedicated VREF and OVDD pins, 0V to VREF analog input range (1.4V–VDD), and SPI/MICROWIRE-compatible serial interface. It is used in portable data acquisition systems requiring low power, high resolution, and compact footprint.

For engineers reviewing the LTC2361CTS8#TRMPBF datasheet, LTC2361CTS8#TRMPBF pinout, LTC2361CTS8#TRMPBF application, or LTC2361CTS8#TRMPBF equivalent, key selection criteria include sampling rate vs. power trade-off, reference flexibility (1.4V min), digital I/O voltage independence (OVDD = 1V–VDD), and guaranteed –40°C to 85°C operation for industrial embedded designs.

Technical Context

The LTC2361CTS8#TRMPBF implements a switched-capacitor SAR architecture with internal sample-and-hold, controlled by an internal oscillator enabling precise 250ksps throughput without external clock dependency. Conversion timing is deterministic: 4μs total throughput (1μs acquisition + 3μs conversion), with no data latency and automatic sleep entry post-conversion.

Its TS8 package supports dual-supply operation: VDD powers analog circuitry and defines maximum reference voltage, while OVDD independently sets SDO output swing (1V–VDD), enabling interoperability with 1.8V/2.5V/3V logic domains. The dedicated VREF pin allows full-scale spans as low as 1.4V, yielding 342μV LSB resolution independent of VDD.

Key Specifications

Pinout & Package

Package: 8-lead plastic TSOT-23 (TS8), 2.9mm × 1.6mm × 0.8mm, moisture sensitivity level 1, RoHS-compliant lead-free finish.

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 LTC2361CTS8#TRMPBF uniquely combines 250ksps throughput, 1.4V–VDD VREF adjustability, and independent OVDD-enabling higher design reuse across voltage-scaled systems and tighter analog signal chain optimization.

Availability

LTC2361CTS8#TRMPBF is available at Aetrix Electronics and suitable for portable medical devices, industrial sensor nodes, automotive body electronics, and battery-operated test equipment requiring stable component supply and long-term manufacturability.

Supply support for LTC2361CTS8#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 LTC2361CTS8#TRMPBF belongs to ADI's legacy Linear Technology precision data acquisition portfolio, designed specifically for ultra-low-power, high-speed, space-constrained applications where resolution, accuracy, and supply flexibility must coexist.

FAQ

What is the maximum sampling rate supported by the LTC2361CTS8#TRMPBF?

The LTC2361CTS8#TRMPBF supports a maximum sampling rate of 250ksps, corresponding to a minimum throughput time of 4μs (1μs acquisition + 3μs conversion). This rate is guaranteed over the full –40°C to +85°C operating temperature range and does not require external clocking, as timing is managed by an internal oscillator.

Does the LTC2361CTS8#TRMPBF require an external reference voltage?

Yes, the LTC2361CTS8#TRMPBF requires an external reference voltage applied to the VREF pin. It accepts VREF from 1.4V up to VDD (2.35V–3.6V), and the analog input range is strictly 0V to VREF. No internal reference is provided; using VDD as reference is not supported in the TS8 package - that configuration is reserved for the 6-lead S6 variant.

Can the LTC2361CTS8#TRMPBF interface directly with a 1.8V microcontroller?

Yes, the LTC2361CTS8#TRMPBF can interface directly with a 1.8V microcontroller by setting OVDD = 1.8V while maintaining VDD at 3.3V. This configures SDO to drive logic-high levels compatible with 1.8V inputs, eliminating level-shifters. SCK and CONV remain compatible as their VIH/VIL thresholds scale with VDD per datasheet specifications.

What is the sleep current of the LTC2361CTS8#TRMPBF and how is it activated?

The LTC2361CTS8#TRMPBF draws 0.1μA typical supply current in sleep mode, activated automatically when CONV remains high after conversion completion. During sleep, all bias currents are shut down; only leakage paths remain active. Power-up occurs on the falling edge of CONV, with full acquisition achieved after t_ACQ = 1μs.

Is the LTC2361CTS8#TRMPBF pin-compatible with other members of the LTC236x family?

No, the LTC2361CTS8#TRMPBF is not pin-compatible with LTC2360 or LTC2362 in the TS8 package - all share identical pinout and footprint. However, it is not pin-compatible with the 6-lead S6 variants (e.g., LTC2361CS6#TRMPBF), which lack VREF and OVDD pins and use VDD as reference. Electrical behavior differs across the family due to distinct internal oscillator tuning for each speed grade.