Analog Devices Inc. LTC2315ITS8-12#TRPBF

Overview

LTC2315ITS8-12#TRPBF 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 2.7 V–5.25 V analog supply, features an integrated 2.048 V / 4.096 V reference with ≤20 ppm/°C drift, delivers 72.6 dB SINAD and –84 dB THD at 500 kHz input, and supports SPI-compatible serial interface with 1.8 V–5 V digital I/O - ideal for high-speed, low-power data acquisition in space-constrained industrial and automotive systems.

For engineers reviewing the LTC2315ITS8-12#TRPBF datasheet, LTC2315ITS8-12#TRPBF pinout, LTC2315ITS8-12#TRPBF application, or LTC2315ITS8-12#TRPBF equivalent, key selection criteria include guaranteed 12-bit no-missing-codes performance, nap/sleep mode power management (<1 µA sleep current), –40°C to +85°C operating range, and compatibility with 1.8 V/2.5 V/3.3 V/5 V host logic without level shifters.

Technical Context

The LTC2315ITS8-12#TRPBF implements a fully integrated SAR architecture with on-chip bandgap reference, reference buffer, and sample-and-hold. Its internal reference auto-configures to 2.048 V at 2.7–3.6 V VDD and 4.096 V at 4.75–5.25 V VDD, eliminating external reference components. The ADC achieves 1-cycle conversion latency and supports three SCK timing modes - including SCK-high-during-acquisition for full 5 Msps throughput - with precise tACQ = 40 ns and tCONV = 160 ns timing.

It separates analog (VDD) and digital I/O (OVDD) supplies to decouple noise-sensitive analog circuitry from digital switching transients. OVDD operates independently from 1.71 V to 5.25 V, enabling direct interfacing with mixed-voltage systems. Power states are controlled via CS pin sequencing: two CS pulses enter nap mode (1.8 mA, fast wake-up), four pulses enter sleep mode (0.8 µA, 1.1 ms VREF recovery).

Key Specifications

Pinout & Package

Package: 8-lead TSOT-23 (0.65 mm pitch), 2.9 mm × 1.6 mm footprint, exposed pad for thermal enhancement. 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 LTC2315ITS8-12#TRPBF uniquely combines 5 Msps speed, integrated dual-span reference, nap/sleep power states, and 1.8 V–5 V OVDD flexibility - making it optimal for compact, battery-aware, high-dynamic-range systems needing both speed and configurability.

Availability

LTC2315ITS8-12#TRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition, medical imaging front-ends, and battery-operated test instrumentation requiring stable component supply, extended temperature qualification, and long-term production continuity.

Supply support for LTC2315ITS8-12#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 LTC2315-12 belongs to ADI's precision high-speed SAR ADC product line, designed specifically for applications demanding low power, small footprint, and excellent AC performance without external reference or level-shifting components.

FAQ

What is the operating temperature range of the LTC2315ITS8-12#TRPBF?

The LTC2315ITS8-12#TRPBF is rated for –40°C to +85°C operation (Industrial grade). This is confirmed by its part number suffix "I" and the ordering table specifying "LTC2315ITS8-12#TRPBF" with temperature range "–40°C to 85°C". It meets full electrical specifications across this range, including INL, DNL, SINAD, and reference drift.

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

No, the LTC2315ITS8-12#TRPBF does not require an external reference. It integrates a precision bandgap reference and reference buffer that 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. The REF pin is internally connected and bypassed with a 2.2 µF capacitor per the datasheet layout guidance.

How does the LTC2315ITS8-12#TRPBF achieve 5 Msps throughput?

The LTC2315ITS8-12#TRPBF achieves 5 Msps by using the SCK-high-during-acquisition timing mode (Figure 6), where tACQ = 40 ns and tCONV = 160 ns yield tTHROUGHPUT = 200 ns. This requires an 87.5 MHz SCK and observing t2 and t10 timing constraints. Other modes (SCK-low or continuous) limit throughput to 4.86 Msps.

What are the power-down modes supported by the LTC2315ITS8-12#TRPBF?

The LTC2315ITS8-12#TRPBF supports two hardware-controlled power-down modes: nap mode (1.8 mA, entered with two CS pulses) and sleep mode (<1 µA, entered with four CS pulses). Nap mode retains reference stability for immediate wake-up; sleep mode shuts down the reference buffer and requires 1.1 ms recovery before valid conversion.

Is the LTC2315ITS8-12#TRPBF pin-compatible with other members of the LTC2315 family?

Yes, the LTC2315ITS8-12#TRPBF is pin-compatible with all variants in the LTC2315-12/14 family (e.g., LTC2315CTS8-12#TRPBF, LTC2315HTS8-12#TRPBF) and shares identical TSOT-23 pinout, interface protocol, and register mapping. Only temperature grade and marking differ - enabling drop-in replacement across C/I/H grades without PCB change.