Analog Devices Inc. LTC2312HTS8-12#TRMPBF

Overview

LTC2312HTS8-12#TRMPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 500ksps successive approximation register (SAR) analog-to-digital converter in an 8-lead TSOT-23 package, operating from a single 3V or 5V supply with integrated 2.048V/4.096V reference and reference buffer. It delivers 72.7dB SINAD, –84dB THD, and 73dB SNR at full speed while consuming only 15mW at 5V, and supports guaranteed no-missing-codes operation across –40°C to 125°C for high-reliability industrial and automotive data acquisition.

For engineers reviewing the LTC2312HTS8-12#TRMPBF datasheet, LTC2312HTS8-12#TRMPBF pinout, LTC2312HTS8-12#TRMPBF application, or LTC2312HTS8-12#TRMPBF equivalent, key selection considerations include its 500ksps throughput with zero-cycle latency, 20ppm/°C max reference drift, SPI-compatible 3-wire serial interface with independent OVDD (1.71–5.25V), nap/sleep power management, and TSOT-23 thermal performance up to 125°C ambient.

Technical Context

The LTC2312HTS8-12#TRMPBF implements a fully integrated SAR architecture with on-chip bandgap reference, low-drift reference buffer, and sample-and-hold circuitry. Its timing is governed by an internal oscillator-no external clock required for conversion-and it uses a rising-edge-activated CONV signal to initiate sampling, followed by automatic nap-mode entry post-conversion.

It features dual-supply separation: VDD (2.7–3.6V or 4.75–5.25V) powers analog and reference circuits, while OVDD (1.71–5.25V) independently sets digital I/O logic levels-enabling direct interfacing with 1.8V, 2.5V, 3.3V, or 5V host systems without level shifters. The SDO output is three-state controlled by CONV and outputs MSB-first 12-bit data with no latency.

Key Specifications

Pinout & Package

Package: 8-lead TSOT-23 (0.65mm pitch), 2.9mm × 1.6mm footprint, exposed pad for thermal enhancement; rated for 150°C junction temperature and 195°C/W θ_JA.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8860IDRCT and MAX11192ETE+, the LTC2312HTS8-12#TRMPBF uniquely combines 500ksps speed, integrated 2.048V/4.096V reference, 125°C operation, and TSOT-23 footprint-making it optimal for thermally demanding, size-limited, and supply-flexible industrial and automotive applications where external reference routing and calibration overhead must be minimized.

Availability

LTC2312HTS8-12#TRMPBF is available at Aetrix Electronics and suitable for high-reliability industrial control, automotive powertrain monitoring, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2312HTS8-12#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 LTC2312HTS8-12#TRMPBF belongs to ADI's precision SAR ADC product line, designed specifically for compact, low-power, high-speed data acquisition in thermally challenging environments where integrated references and guaranteed 125°C operation are essential.

FAQ

What is the maximum operating temperature specification for the LTC2312HTS8-12#TRMPBF?

The LTC2312HTS8-12#TRMPBF is specified for continuous operation from –40°C to +125°C ambient temperature, with a maximum junction temperature of 150°C. This H-grade qualification makes it suitable for under-hood automotive applications, industrial motor drives, and other high-temperature environments where standard commercial or industrial grade ADCs would fail.

Does the LTC2312HTS8-12#TRMPBF require an external reference voltage?

No-the LTC2312HTS8-12#TRMPBF includes an integrated, factory-trimmed 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 functions as both output and overvoltage input, eliminating the need for external reference ICs in most applications unless tighter initial accuracy or lower drift is required.

How does the nap mode power management work in the LTC2312HTS8-12#TRMPBF?

The LTC2312HTS8-12#TRMPBF automatically enters nap mode after each conversion completes, reducing supply current to ~2mA while retaining reference buffer and bandgap bias. Wake-up occurs within <50ns upon next CONV pulse-enabling rapid burst sampling without reference re-stabilization delay. This differs from sleep mode, which shuts down reference circuitry and requires 1.1ms recovery.

Can the LTC2312HTS8-12#TRMPBF interface directly with a 1.8V microcontroller?

Yes-the LTC2312HTS8-12#TRMPBF supports OVDD from 1.71V to 5.25V, allowing its SDO, SCK, and CONV pins to operate at 1.8V logic levels. When OVDD = 1.8V, VIH = 1.44V and VOL = 0.2V meet standard 1.8V CMOS input thresholds, enabling direct connection to 1.8V MCUs without level-shifting circuitry.

What is the minimum acquisition time required for full 12-bit accuracy at 500ksps?

The LTC2312HTS8-12#TRMPBF specifies a minimum acquisition time (tACQ) of 600ns at 500ksps. To achieve full 12-bit settling, the driving amplifier must settle to <±0.5LSB (≈0.012% of VREF) within this window-requiring sufficient bandwidth and low output impedance, especially when driving through external RC filters or high-source-impedance sensors.