Analog Devices Inc. LTC2314ITS8-14#TRMPBF

Overview

LTC2314ITS8-14#TRMPBF from Analog Devices (formerly Linear Technology) is a 14-bit, 4.5 Msps successive approximation register (SAR) analog-to-digital converter in an 8-lead TSOT-23 package. It operates from a 2.7V–5.25V analog supply, draws only 6.2 mA at 5 V, delivers 77.5 dB SNR and –85 dB THD at 500 kHz input, and integrates a low-drift (20 ppm/°C max) internal reference with 2.048 V / 4.096 V span selection-enabling compact, battery-operated high-speed data acquisition systems.

For engineers reviewing the LTC2314ITS8-14#TRMPBF datasheet, LTC2314ITS8-14#TRMPBF pinout, LTC2314ITS8-14#TRMPBF application, or LTC2314ITS8-14#TRMPBF equivalent, key selection criteria include guaranteed 14-bit no-missing-codes performance, 1-cycle latency SPI-compatible serial interface, dual power domains (VDD + OVDD), nap/sleep modes (<1 µA sleep current), and operation across –40°C to +85°C industrial temperature range.

Technical Context

The LTC2314ITS8-14#TRMPBF implements a SAR architecture with integrated bandgap reference and reference buffer, automatically selecting 2.048 V output for VDD = 2.7–3.6 V and 4.096 V for VDD = 4.75–5.25 V. Its sample-and-hold acquires in 40 ns and converts in 182 ns, achieving 222 ns minimum throughput time at 4.5 Msps using SCK-high-during-acquisition timing.

It features separate analog (VDD) and digital I/O (OVDD) supplies-OVDD supports 1.71–5.25 V logic levels-enabling direct interfacing with 1.8 V, 2.5 V, 3.3 V, or 5 V host processors. Power management includes nap mode (1.8 mA, fast wake-up <1 conversion) and sleep mode (0.8 µA typical, 1.1 ms VREF recovery).

Key Specifications

Pinout & Package

Package: 8-lead plastic TSOT-23 (0.65 mm pitch), 2.9 mm × 1.6 mm footprint, exposed pad for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 14-bit SAR ADC applications.

Compared with ADS8860IDRCT and MAX11198ETE+T, LTC2314ITS8-14#TRMPBF uniquely balances 4.5 Msps speed, integrated dual-span reference, industrial temperature rating, and sub-µA sleep current-making it optimal for portable, high-bandwidth, battery-aware systems requiring minimal external components.

Availability

LTC2314ITS8-14#TRMPBF is available at Aetrix Electronics and suitable for high-speed data acquisition, medical imaging front-ends, and automotive sensor hub applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for LTC2314ITS8-14#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, communications, automotive, and healthcare markets.

The LTC2314-14 belongs to ADI's precision high-speed SAR ADC product line, designed specifically for applications demanding low power, small size, excellent AC performance, and simplified system integration via integrated references and flexible I/O supplies.

FAQ

What is the maximum sampling rate supported by the LTC2314ITS8-14#TRMPBF?

The LTC2314ITS8-14#TRMPBF supports a maximum sampling rate of 4.5 Msps, achievable only when using the SCK-high-during-acquisition timing pattern with an 87.5 MHz serial clock. This requires precise adherence to t_ACQ = 40 ns and t_CONV = 182 ns, yielding a minimum throughput time of 222 ns. Other timing patterns (SCK-low or continuous) reduce maximum throughput to 4.375 Msps.

Does the LTC2314ITS8-14#TRMPBF require an external reference voltage?

No, the LTC2314ITS8-14#TRMPBF does not require an external reference. It integrates a precision bandgap reference and reference buffer that auto-selects either 2.048 V (when VDD is 2.7–3.6 V) or 4.096 V (when VDD is 4.75–5.25 V). The REF pin serves as both output and overdrive-capable input, and must be bypassed with a 2.2 µF ceramic capacitor for stability.

How does the nap mode function in the LTC2314ITS8-14#TRMPBF?

The nap mode in the LTC2314ITS8-14#TRMPBF is entered by pulsing the CS pin twice while holding SCK static. In nap mode, the device draws 1.8 mA typical supply current and retains reference buffer bias-allowing wake-up and valid conversion within one clock cycle. This makes LTC2314ITS8-14#TRMPBF ideal for intermittent sampling applications where latency must remain minimal.

What digital logic levels are compatible with the LTC2314ITS8-14#TRMPBF's serial interface?

The LTC2314ITS8-14#TRMPBF's serial interface (CS, SCK, SDO) is compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic families because its OVDD pin accepts 1.71–5.25 V and defines all I/O voltage thresholds. This eliminates level shifters when interfacing with modern low-voltage FPGAs or legacy 5 V microcontrollers-directly supporting mixed-voltage system architectures.

Is the LTC2314ITS8-14#TRMPBF pin-compatible with other members of the LTC231x family?

Yes, the LTC2314ITS8-14#TRMPBF is pin-compatible with the entire LTC2312/LTC2313/LTC2314/LTC2315 14-/12-bit SAR ADC family in the 8-lead TSOT-23 package. This allows drop-in substitution between speed grades (500 ksps, 2.5 Msps, 4.5 Msps, 5 Msps) and resolutions (12-bit or 14-bit) without PCB layout changes-simplifying design reuse and performance scaling.