Analog Devices Inc. LTC2314CTS8-14#TRMPBF

Overview

LTC2314CTS8-14#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. It is used in high-speed data acquisition systems requiring compact size and low power.

For engineers reviewing the LTC2314CTS8-14#TRMPBF datasheet, LTC2314CTS8-14#TRMPBF pinout, LTC2314CTS8-14#TRMPBF application, or LTC2314CTS8-14#TRMPBF equivalent, key selection considerations include guaranteed 14-bit no-missing-codes performance, 1-cycle conversion latency, dual-supply flexibility (VDD = 2.7–5.25 V, OVDD = 1.71–5.25 V), nap/sleep power modes (<1 µA sleep current), and operation across 0°C to 70°C.

Technical Context

The LTC2314CTS8-14#TRMPBF implements a SAR architecture with integrated bandgap reference and reference buffer, automatically selecting 2.048 V span at 2.7–3.6 V VDD or 4.096 V span at 4.75–5.25 V VDD. Its timing logic supports three serial interface modes - SCK held low/high during acquisition or continuous clocking - with maximum throughput of 4.5 Msps achievable only when SCK is held high during t_ACQ.

It features separate analog (VDD) and digital I/O (OVDD) supplies, enabling interoperability with 1.8 V, 2.5 V, 3.3 V, or 5 V host logic. Conversion latency is fixed at one cycle, and SDO output is high-impedance when CS is high; data is MSB-first with one or two leading zeros depending on timing mode.

Key Specifications

Pinout & Package

Package: 8-lead TSOT-23 (0.65 mm pitch, 2.9 mm × 1.6 mm footprint), RoHS-compliant, lead-free finish.

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#TRMPBF uniquely combines 4.5 Msps speed, integrated dual-span reference, wide OVDD range (1.71–5.25 V), and hardware-controllable nap/sleep modes - making it optimal for compact, battery-aware, high-throughput systems needing minimal external components.

Availability

LTC2314CTS8-14#TRMPBF is available at Aetrix Electronics and suitable for high-speed data acquisition, medical imaging systems, and handheld terminal interfaces requiring stable component supply, full traceability, and long-term lifecycle support.

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

The LTC2314-14 belongs to ADI's precision high-speed SAR ADC product line, designed specifically for space-constrained, low-power applications demanding both speed (≥4 Msps) and DC/AC accuracy without external references or complex power sequencing.

FAQ

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

The LTC2314CTS8-14#TRMPBF supports a maximum sampling rate of 4.5 Msps, achievable only when using the SCK-held-high-during-acquisition timing mode. This requires strict adherence to t_ACQ ≥ 40 ns and t_CONV = 182 ns, yielding a minimum throughput time of 222 ns. Other timing modes (SCK low or continuous) reduce maximum throughput to 4.375 Msps.

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

No, the LTC2314CTS8-14#TRMPBF does not require an external reference. It integrates a precision bandgap reference and reference buffer that auto-selects either a 2.048 V output (when VDD is 2.7–3.6 V) or 4.096 V output (when VDD is 4.75–5.25 V). An external 2.2 µF capacitor on the REF pin is mandatory for stability and noise performance.

How does the nap mode of the LTC2314CTS8-14#TRMPBF differ from sleep mode?

Nap mode reduces supply current to 1.8 mA while keeping the internal bandgap and reference buffer active, enabling wake-up and valid conversion within one clock cycle. Sleep mode reduces current to <1 µA typical by powering down those circuits, but requires 1.1 ms for V_REF to recover before accurate conversion - making nap ideal for burst-mode acquisition and sleep best for extended idle periods.

What digital logic voltages are compatible with the LTC2314CTS8-14#TRMPBF's serial interface?

The LTC2314CTS8-14#TRMPBF supports 1.8 V, 2.5 V, 3.3 V, and 5 V logic levels via its dedicated OVDD pin (1.71–5.25 V range). Input thresholds scale with OVDD (VIH = 0.8 × OVDD, VIL = 0.2 × OVDD), and SDO output swing tracks OVDD - eliminating level shifters when interfacing with mixed-voltage microcontrollers or FPGAs.

Is the LTC2314CTS8-14#TRMPBF pin-compatible with other members of the LTC231x-14 family?

Yes, the LTC2314CTS8-14#TRMPBF is pin-compatible with the entire LTC2312-14, LTC2313-14, and LTC2314-14 14-bit SAR ADC family in the 8-lead TSOT-23 package. This allows drop-in replacement across 500 ksps (LTC2312-14), 2.5 Msps (LTC2313-14), and 4.5 Msps (LTC2314CTS8-14#TRMPBF) variants - simplifying design scalability and prototyping.