Analog Devices Inc. LTC2361CS6#TRMPBF

Overview

LTC2361CS6#TRMPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 250ksps successive-approximation ADC in a 6-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 single-ended analog input (0V to VDD), no data latency, SPI/MICROWIRE-compatible 3-wire serial interface, and is optimized for battery-powered portable instrumentation and low-power sensor interfaces.

For engineers reviewing the LTC2361CS6#TRMPBF datasheet, LTC2361CS6#TRMPBF pinout, LTC2361CS6#TRMPBF application, or LTC2361CS6#TRMPBF equivalent, key selection criteria include sampling rate vs. power trade-off, VDD-referenced input range, TSOT-23-6 footprint constraints, and compatibility with 3V microcontroller I/O levels without external level shifting.

Technical Context

The LTC2361CS6#TRMPBF implements an internal sample-and-hold with 1ns aperture delay and 0.3ns jitter, enabling accurate high-frequency sampling up to its 250ksps maximum rate. Its switched-capacitor architecture uses VDD as both supply and reference, eliminating need for external reference components.

Conversion is initiated by a rising edge on CONV; SDO becomes active upon CONV low, outputting 12-bit MSB-first data synchronized to SCK falling edges. The device automatically enters sleep mode after conversion completion when CONV remains high, reducing current to 0.1μA.

Key Specifications

Pinout & Package

Package: 6-lead plastic TSOT-23 (S6), 2.9mm × 1.6mm × 0.8mm profile, exposed pad optional, 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 MAX11100ETT+, the LTC2361CS6#TRMPBF uniquely combines VDD-referenced operation, automatic sleep mode, and guaranteed 250ksps performance in a 6-pin TSOT-23-making it optimal for ultra-low-power, space-constrained, single-supply systems where reference simplicity and dynamic power scaling are essential.

Availability

LTC2361CS6#TRMPBF is available at Aetrix Electronics and suitable for portable medical sensors, industrial process monitoring, automotive cabin sensors, and energy metering subsystems requiring stable component supply with traceable sourcing and long-term lifecycle support.

Supply support for LTC2361CS6#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2361CS6#TRMPBF belongs to ADI's legacy Linear Technology precision data acquisition product line, engineered specifically for ultra-low-power, high-speed, small-footprint SAR ADC applications in battery-operated and space-constrained embedded systems.

FAQ

What is the maximum sampling rate supported by the LTC2361CS6#TRMPBF?

The LTC2361CS6#TRMPBF supports a maximum sampling rate of 250ksps, as specified in its timing characteristics table. This rate is guaranteed over the full 0°C to 70°C operating temperature range and requires SCK frequencies up to 25MHz. At this rate, the device achieves 73dB SNR and maintains 12-bit no-missing-codes performance, making it suitable for medium-bandwidth signal acquisition tasks such as sensor monitoring and waveform capture.

Does the LTC2361CS6#TRMPBF require an external voltage reference?

No, the LTC2361CS6#TRMPBF does not require an external voltage reference. In the S6 package configuration, it uses VDD as the reference source, establishing a 0V to VDD analog input range. This eliminates the need for external reference ICs or resistor dividers, reducing component count and board area-particularly valuable in compact, cost-sensitive designs like portable instrumentation and wearable electronics.

How does the LTC2361CS6#TRMPBF enter and exit sleep mode?

The LTC2361CS6#TRMPBF automatically enters sleep mode after conversion completion when the CONV pin remains high, reducing supply current to 0.1μA typical. To exit sleep mode, a falling edge on CONV initiates power-up and acquisition; the device is fully ready to convert again after tACQ = 1μs. This autonomous behavior requires no firmware overhead or external control signals, simplifying low-power system design and extending battery life in duty-cycled applications.

What are the absolute maximum ratings for the AIN pin on the LTC2361CS6#TRMPBF?

The absolute maximum rating for the AIN pin on the LTC2361CS6#TRMPBF is –0.3V to (VDD + 0.3V), as stated in the Absolute Maximum Ratings table. Exceeding these limits may cause permanent damage. Internal clamping diodes protect against minor overvoltage, but sustained operation outside this range risks latch-up or degradation. For robust design, ensure AIN stays within 0V to VDD under normal operation and include series resistance if transient overvoltage is possible.

Is the LTC2361CS6#TRMPBF compatible with standard SPI interfaces?

Yes, the LTC2361CS6#TRMPBF is SPI/MICROWIRE-compatible using a 3-wire interface (CONV, SCK, SDO). It operates in master-in/slave-out mode with data valid on SCK falling edges and MSB-first transmission. While it lacks a dedicated chip select (CS), CONV serves that function: high = deselected/sleep, low = selected/active. No level-shifting is needed for 3V MCU interfaces, and timing margins exceed standard SPI requirements at 25MHz SCK.