Analog Devices Inc. LTC2312ITS8-14#TRMPBF

Overview

LTC2312ITS8-14#TRMPBF from Analog Devices (formerly Linear Technology) is a 14-bit, 500ksps successive approximation register (SAR) analog-to-digital converter in an 8-lead TSOT-23 package, operating from a single 3V or 5V analog supply with integrated 2.048V/4.096V low-drift reference (20ppm/°C max), delivering 77dB SINAD and –85dB THD at full speed - ideal for high-speed, low-power data acquisition in battery-operated and automotive systems.

For engineers reviewing the LTC2312ITS8-14#TRMPBF datasheet, LTC2312ITS8-14#TRMPBF pinout, LTC2312ITS8-14#TRMPBF application, or LTC2312ITS8-14#TRMPBF equivalent, key selection criteria include guaranteed no missing codes, nap/sleep mode power management (<1µA sleep current), SPI-compatible serial interface with 1.8V–5V OVDD compatibility, and operation across –40°C to +85°C industrial temperature range.

Technical Context

The LTC2312ITS8-14#TRMPBF implements a fully integrated SAR architecture with on-chip sample-and-hold, internal bandgap reference, and reference buffer - eliminating external reference components while maintaining 14-bit monotonicity and ±1 LSB INL over temperature. Its timing logic synchronizes conversion initiation via rising-edge-triggered CONV and outputs 14-bit MSB-first serial data with zero-cycle latency.

It features dual-supply isolation: VDD (2.7–3.6V or 4.75–5.25V) powers analog circuitry including the reference, while OVDD (1.71–5.25V) independently supplies digital I/O, enabling interoperability with mixed-voltage host systems (e.g., 1.8V FPGA, 3.3V MCU). Automatic nap mode activation post-conversion reduces average current to ~2mA at lower sampling rates.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 14-bit SAR ADC applications.

Compared with ADS8860IDRCT and MAX11198ETE+, the LTC2312ITS8-14#TRMPBF uniquely combines integrated low-drift reference, independent OVDD for multi-voltage interoperability, and industrial temperature qualification - reducing design effort while maintaining 500ksps throughput and 77dB SINAD in space-constrained applications.

Availability

LTC2312ITS8-14#TRMPBF is available at Aetrix Electronics and suitable for medical imaging front-ends, automotive battery monitors, and handheld test equipment requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for LTC2312ITS8-14#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 technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC2312-14 belongs to ADI's precision SAR ADC product line, designed specifically for high-speed, low-power, space-constrained applications where integrated references, wide temperature operation, and simple 3-wire digital interfaces reduce system complexity.

FAQ

What is the maximum sampling rate of the LTC2312ITS8-14#TRMPBF?

The LTC2312ITS8-14#TRMPBF supports a maximum sampling rate of 500ksps, with guaranteed timing performance across its full –40°C to +85°C operating temperature range. This rate is achieved using an internal oscillator and requires a minimum SCK frequency of 20MHz for serial readout. At lower sampling rates, the device automatically enters nap mode to reduce average supply current.

Does the LTC2312ITS8-14#TRMPBF require an external reference?

No, the LTC2312ITS8-14#TRMPBF integrates a factory-trimmed, low-drift reference that outputs 2.048V when powered from 2.7–3.6V or 4.096V when powered from 4.75–5.25V. The REF pin serves as both output and overdrive-capable input, eliminating external reference components while maintaining 20ppm/°C max drift and supporting precise single-ended analog measurements.

How does the LTC2312ITS8-14#TRMPBF manage power in low-duty-cycle applications?

The LTC2312ITS8-14#TRMPBF offers two low-power states: nap mode (2mA typical) entered automatically after each conversion, and sleep mode (0.2µA typical) activated by four consecutive CONV pulses. Sleep mode disables the internal bandgap and reference buffer, requiring 1.1ms wake-up time before valid conversion; nap mode retains reference stability for immediate wake-up within one conversion cycle.

Can the LTC2312ITS8-14#TRMPBF interface directly with a 1.8V microcontroller?

Yes, the LTC2312ITS8-14#TRMPBF supports direct 1.8V logic interfacing via its dedicated OVDD pin (1.71–5.25V range), which sets SDO output voltage levels and accepts SCK/CONV input thresholds. This eliminates level-shifting circuitry when connecting to 1.8V FPGAs or MCUs, while VDD remains independently powered at 3V or 5V for optimal analog performance.

What is the analog input configuration of the LTC2312ITS8-14#TRMPBF?

The LTC2312ITS8-14#TRMPBF features a single-ended analog input (AIN) referenced to GND, with full-scale range of 0V to V_REF. It draws ≤1µA DC leakage and presents 13pF capacitance in sample mode. For optimal performance with high-impedance sources, a unity-gain buffer amplifier (e.g., LT6230) is recommended to meet the 700ns acquisition time requirement without gain error or distortion degradation.