Analog Devices Inc. LTC2314CTS8-14#TRPBF

Overview

LTC2314CTS8-14#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, integrates a low-drift (20 ppm/°C max) internal reference (2.048 V or 4.096 V), and achieves 77.5 dB SNR and –85 dB THD at 500 kHz input frequency. It is used in high-speed data acquisition systems requiring compact size, low power, and wide temperature operation (0°C to 70°C).

For engineers reviewing the LTC2314CTS8-14#TRPBF datasheet, LTC2314CTS8-14#TRPBF pinout, LTC2314CTS8-14#TRPBF application, or LTC2314CTS8-14#TRPBF equivalent, key selection criteria include guaranteed 14-bit no-missing-codes performance, SPI-compatible serial interface with 1.8V–5V OVDD compatibility, nap/sleep power modes (<1 µA sleep current), and TSOT-23 footprint suitability for space-constrained industrial and portable designs.

Technical Context

The LTC2314CTS8-14#TRPBF implements a single-ended SAR architecture with integrated bandgap reference and reference buffer, automatically selecting 2.048 V span at 2.7V–3.6V VDD or 4.096 V span at 4.75V–5.25V VDD. Its timing logic supports three serial interface modes-SCK held high/low during acquisition or continuous clock-with minimum throughput time of 222 ns enabling true 4.5 Msps sampling.

It features separate analog (VDD) and digital I/O (OVDD) supplies, allowing independent voltage scaling (1.71V–5.25V OVDD) for interfacing with 1.8V, 2.5V, 3.3V, or 5V host logic. Power-down entry requires only CS pulse sequences (2 pulses → nap mode; 4 pulses → sleep mode), with wake-up latency of <50 ns from nap and 1.1 ms from sleep due to reference capacitor recharge.

Key Specifications

Pinout & Package

Package: 8-lead TSOT-23 (0.65 mm pitch), 2.9 mm × 1.6 mm footprint, exposed pad optional for thermal enhancement. RoHS-compliant, lead-free finish (#TRPBF).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8860IDRCT and MAX11198ETE+, the LTC2314CTS8-14#TRPBF uniquely combines 4.5 Msps speed, integrated dual-range reference, 1.8V–5V OVDD compatibility, and sub-1µA sleep current-making it optimal for portable, multi-voltage, high-throughput acquisition where board space and power budget are constrained.

Availability

LTC2314CTS8-14#TRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition, handheld terminal interface, medical imaging signal chain, and uninterruptible power supply monitoring requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LTC2314CTS8-14#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 technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC2314CTS8-14#TRPBF belongs to ADI's precision high-speed SAR ADC product line, engineered for applications demanding low power, small form factor, and robust AC performance without external reference or level-shifting components.

FAQ

What is the maximum sampling rate supported by the LTC2314CTS8-14#TRPBF?

The LTC2314CTS8-14#TRPBF supports a maximum sampling rate of 4.5 Msps, achievable only when using the SCK-held-high-during-acquisition timing mode with an 87.5 MHz serial clock. This yields a minimum throughput time of 222 ns and enables accurate digitization of signals up to 2.2 MHz. Other timing modes (SCK low or continuous) reduce maximum throughput to 4.375 Msps.

Does the LTC2314CTS8-14#TRPBF require an external reference voltage?

No, the LTC2314CTS8-14#TRPBF does not require an external reference. It integrates a precision bandgap reference and reference buffer that automatically outputs 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 must be bypassed with a 2.2 µF ceramic capacitor to ensure stability and low noise performance.

How does the nap mode differ from sleep mode in the LTC2314CTS8-14#TRPBF?

In nap mode, the LTC2314CTS8-14#TRPBF disables the ADC core but retains bias on the internal bandgap and reference buffer, resulting in 1.8 mA supply current and wake-up latency under 50 ns. In sleep mode, all bias circuitry-including the reference-is shut down, reducing current to <1 µA but requiring 1.1 ms for reference capacitor recharge before valid conversion. Nap mode is ideal for short idle intervals; sleep mode suits extended standby.

Can the LTC2314CTS8-14#TRPBF interface directly with a 1.8V microcontroller?

Yes, the LTC2314CTS8-14#TRPBF can interface directly with a 1.8V microcontroller by setting OVDD = 1.8V. Its digital I/O pins (CS, SCK, SDO) are fully compatible with 1.71–5.25V OVDD, and logic thresholds scale with OVDD (VIH = 0.8 × OVDD, VIL = 0.2 × OVDD). No external level shifters are needed, simplifying design and reducing component count.

What is the analog input voltage range for the LTC2314CTS8-14#TRPBF?

The analog input (AIN) voltage range of the LTC2314CTS8-14#TRPBF is 0 V to VREF, where VREF is either 2.048 V or 4.096 V depending on the applied VDD voltage. Absolute input limits are –0.05 V to VDD + 0.05 V. Exceeding the 0–VREF range results in code clamping but does not damage the device, thanks to internal ESD protection diodes.