Analog Devices Inc. LTC2314HTS8-14#TRPBF

Overview

LTC2314HTS8-14#TRPBF 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 6.2 mA at 5 V, delivers 77.5 dB SNR and –85 dB THD at 500 kHz input, and features an integrated 2.048 V / 4.096 V reference with ≤20 ppm/°C drift - enabling high-precision data acquisition in space-constrained, high-speed industrial sensing systems.

For engineers reviewing the LTC2314HTS8-14#TRPBF datasheet, LTC2314HTS8-14#TRPBF pinout, LTC2314HTS8-14#TRPBF application, or LTC2314HTS8-14#TRPBF equivalent, key selection criteria include guaranteed 14-bit no-missing-codes performance over –40°C to 125°C, SPI-compatible 3-wire serial interface with 1-cycle latency, dual-supply flexibility (VDD = 2.7–5.25 V, OVDD = 1.71–5.25 V), nap/sleep power-down modes (<1 µA sleep current), and internal reference buffer eliminating external precision references.

Technical Context

The LTC2314HTS8-14#TRPBF implements a SAR architecture with integrated bandgap reference and reference buffer, automatically selecting 2.048 V span for VDD = 2.7–3.6 V and 4.096 V span for VDD = 4.75–5.25 V. Its sample-and-hold supports 40 ns acquisition time and 182 ns conversion time, enabling 4.5 Msps throughput only when SCK is held high during acquisition.

It uses a 3-wire SPI-compatible interface (CS, SCK, SDO) with OVDD-referenced logic levels, supporting 1.8 V, 2.5 V, 3.3 V, and 5 V host systems. Power management includes nap mode (1.8 mA, fast wake-up in <1 conversion) and sleep mode (0.8 µA typical, 1.1 ms reference recovery), both entered via CS pulse sequences without requiring register writes.

Key Specifications

Pinout & Package

Package: 8-lead TSOT-23 (0.65 mm pitch), RoHS-compliant, moisture-sensitive level 1, rated for 260°C reflow.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed SAR ADC applications.

Compared with ADS8860IRGET and MAX11198ETE+, the LTC2314HTS8-14#TRPBF uniquely combines 4.5 Msps speed, integrated dual-span reference, and full –40°C to 125°C qualification - making it the only option for compact, high-temperature, high-throughput industrial and automotive data loggers.

Availability

LTC2314HTS8-14#TRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition, medical imaging front-ends, and automotive engine control units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2314HTS8-14#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2314HTS8-14#TRPBF belongs to ADI's precision high-speed SAR ADC product line, designed specifically for applications demanding high resolution, low power, and robust operation in thermally demanding environments without external reference components.

FAQ

What is the maximum sampling rate of the LTC2314HTS8-14#TRPBF and under what conditions is it achieved?

The LTC2314HTS8-14#TRPBF achieves a maximum sampling rate of 4.5 Msps only when using the SCK-high-during-acquisition timing pattern (Figure 6 in the datasheet), with t_ACQ = 40 ns and t_CONV = 182 ns. This requires an 87.5 MHz SCK clock and strict adherence to t₂ and t₁₀ timing margins. Other timing patterns yield ≤4.375 Msps.

Does the LTC2314HTS8-14#TRPBF require an external reference voltage?

No, the LTC2314HTS8-14#TRPBF does not require an external reference. It integrates a precision bandgap and reference buffer that automatically outputs either 2.048 V (when VDD = 2.7–3.6 V) or 4.096 V (when VDD = 4.75–5.25 V), with ≤20 ppm/°C drift. An external reference may be applied to REF only if overdriven ≥50 mV above the internal value.

How does the nap mode of the LTC2314HTS8-14#TRPBF differ from sleep mode in terms of wake-up behavior?

Nap mode (entered with two CS pulses) retains bias on the internal bandgap and reference buffer, allowing wake-up and valid conversion within one SCK cycle. Sleep mode (four CS pulses) shuts down all bias circuitry, resulting in 0.8 µA supply current but requiring 1.1 ms for the 2.2 µF REF bypass capacitor to recharge before accurate conversion - a fixed delay independent of load.

Can the LTC2314HTS8-14#TRPBF interface directly with a 1.8 V FPGA without level-shifting circuitry?

Yes, the LTC2314HTS8-14#TRPBF supports direct 1.8 V interfacing via its dedicated OVDD pin (1.71–5.25 V range), which sets logic thresholds for CS/SCK inputs and output swing for SDO. When OVDD = 1.8 V, VIH = 1.44 V min and VOL = 0.2 V max meet standard 1.8 V CMOS specifications without external translators.

What is the guaranteed operating temperature range for the LTC2314HTS8-14#TRPBF?

The LTC2314HTS8-14#TRPBF is specified and tested for continuous operation from –40°C to +125°C (H-grade), as confirmed by its ordering part number suffix "HTS8" and Absolute Maximum Ratings table. All key AC/DC specifications - including INL, DNL, SNR, and reference drift - are guaranteed across this full range.