Analog Devices Inc. LTC2315ITS8-12#TRMPBF

Overview

LTC2315ITS8-12#TRMPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 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 delivers 72.6 dB SINAD at 500 kHz input frequency - enabling high-fidelity signal capture in space-constrained, battery-powered instrumentation.

For engineers reviewing the LTC2315ITS8-12#TRMPBF datasheet, LTC2315ITS8-12#TRMPBF pinout, LTC2315ITS8-12#TRMPBF application, or LTC2315ITS8-12#TRMPBF equivalent, key selection considerations include its 5 Msps throughput with 1-cycle latency, dual-supply flexibility (VDD up to 5.25 V, OVDD from 1.71 V to 5.25 V), guaranteed 12-bit no-missing-codes performance over –40°C to +85°C, and support for nap/sleep modes (<1 µA typical sleep current).

Technical Context

The LTC2315ITS8-12#TRMPBF implements a fully integrated SAR architecture with on-chip bandgap reference and reference buffer, eliminating external voltage references and reducing BOM count. Its timing logic supports three SCK timing configurations - including SCK-high-during-acquisition mode - to achieve the full 5 Msps throughput with 200 ns minimum throughput time.

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 systems. The serial interface uses a 3-wire SPI-compatible protocol (CS, SCK, SDO), with MSB-first 12-bit data output preceded by one or two leading zeros depending on acquisition timing, and automatic high-impedance SDO state control via CS.

Key Specifications

Pinout & Package

Package: 8-lead plastic TSOT-23 (0.65 mm pitch, 2.9 mm × 1.6 mm footprint), RoHS-compliant, lead-free finish. Thermal resistance θ_JA = 195°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit SAR ADC applications.

Compared with ADS8860IDRCT and MAX11198ETE+, the LTC2315ITS8-12#TRMPBF uniquely combines 5 Msps throughput, integrated dual-span reference, nap/sleep modes, and wide OVDD compatibility - making it optimal for compact, high-speed, mixed-voltage embedded systems requiring both speed and power agility.

Availability

LTC2315ITS8-12#TRMPBF is available at Aetrix Electronics and suitable for high-speed data acquisition, handheld terminal interface, and automotive sensor interface applications requiring stable component supply, industrial temperature grade, and RoHS-compliant packaging.

Supply support for LTC2315ITS8-12#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, automotive, communications, and healthcare markets.

The LTC2315-12 belongs to ADI's precision high-speed SAR ADC product line, designed specifically for compact, low-power, high-throughput data acquisition systems where board space, thermal budget, and timing determinism are critical constraints.

FAQ

What is the operating temperature range for the LTC2315ITS8-12#TRMPBF?

The LTC2315ITS8-12#TRMPBF is rated for industrial temperature operation from –40°C to +85°C. This specification is guaranteed across all electrical parameters including INL (±0.3 LSB), SINAD (≥69.5 dB), and reference drift (≤20 ppm/°C), making it suitable for demanding embedded environments such as automotive ECUs and portable test gear.

Does the LTC2315ITS8-12#TRMPBF require an external reference?

No, the LTC2315ITS8-12#TRMPBF includes an integrated bandgap reference and reference buffer. It automatically outputs 2.048 V when VDD is 2.7–3.6 V, or 4.096 V when VDD is 4.75–5.25 V. An external reference may be applied to the REF pin if higher accuracy or custom span is needed, but it is not required for standard operation of the LTC2315ITS8-12#TRMPBF.

How does the nap mode of the LTC2315ITS8-12#TRMPBF differ from sleep mode?

Nap mode reduces current to ~1.8 mA while keeping the internal reference and bandgap active, enabling wake-up and valid conversion within one clock cycle. Sleep mode draws <1 µA typical but powers down the reference buffer, requiring 1.1 ms for VREF recovery before the next accurate conversion. Both modes are entered via specific CS pulse sequences and controlled entirely through the serial interface of the LTC2315ITS8-12#TRMPBF.

What digital logic levels does the LTC2315ITS8-12#TRMPBF support on its serial interface?

The LTC2315ITS8-12#TRMPBF supports 1.8 V, 2.5 V, 3.3 V, and 5 V logic levels on CS, SCK, and SDO pins via the dedicated OVDD supply (1.71–5.25 V). This allows direct connection to diverse host processors - including low-voltage FPGAs and legacy 5 V MCUs - without level-shifting circuitry, simplifying system integration for the LTC2315ITS8-12#TRMPBF.

Can the LTC2315ITS8-12#TRMPBF achieve 5 Msps with any SCK timing configuration?

No - the full 5 Msps throughput is only achievable using the "SCK held high during acquisition" timing pattern (Figure 6 in the datasheet), which yields a minimum throughput time of 200 ns. The SCK-low-during-acquisition and continuous-SCK patterns are limited to 4.86 Msps maximum due to integer-clock-period constraints. This timing dependency must be implemented in firmware or hardware logic controlling the LTC2315ITS8-12#TRMPBF.