Analog Devices Inc. LTC2312HTS8-12#WTRPBF

Overview

LTC2312HTS8-12#WTRPBF from Analog Devices 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 guaranteed no missing codes across –40°C to 125°C, targeting high-speed data acquisition in automotive and industrial systems.

For engineers reviewing the LTC2312HTS8-12#WTRPBF datasheet, LTC2312HTS8-12#WTRPBF pinout, LTC2312HTS8-12#WTRPBF application, or LTC2312HTS8-12#WTRPBF equivalent, this page provides verified technical context, exact pin functions, thermal-grade performance specifications, AEC-Q100–qualified operation, and validated alternative options for automotive-grade 12-bit SAR ADC selection.

Technical Context

The LTC2312HTS8-12#WTRPBF implements a fully integrated SAR architecture with internal bandgap reference, low-drift (≤20ppm/°C) reference buffer, and auto-power-down nap mode triggered after each conversion. Its timing logic uses an internal oscillator to enforce fixed 1400ns conversion time and 600ns acquisition window, enabling deterministic 500ksps throughput without cycle latency.

It features dual-supply operation: VDD (2.7–3.6V or 4.75–5.25V) powers analog circuitry and reference, while OVDD (1.71–5.25V) independently supplies digital I/O-supporting direct interfacing with 1.8V, 2.5V, 3.3V, or 5V host logic. The SDO output enters high-impedance state when CONV is high, eliminating bus contention.

Key Specifications

Pinout & Package

Package: 8-lead TSOT-23 (0.65mm pitch), thermally enhanced plastic surface-mount package with exposed pad (not electrically connected), footprint compatible with JEDEC MO-220VARF.

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 LTC2312HTS8-12#WTRPBF uniquely combines AEC-Q100 Grade H qualification, dual 3V/5V supply support, integrated reference with 20ppm/°C drift, and deterministic 500ksps latency-free timing-making it the only drop-in option for thermally demanding automotive signal acquisition.

Availability

LTC2312HTS8-12#WTRPBF is available at Aetrix Electronics and suitable for automotive battery management, industrial motor control, and portable medical device applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2312HTS8-12#WTRPBF 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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The LTC2312 family was designed specifically for space-constrained, low-power, high-speed data acquisition in harsh environments-emphasizing integrated references, wide supply flexibility, and automotive-grade reliability without sacrificing AC performance.

FAQ

What is the maximum sampling rate of the LTC2312HTS8-12#WTRPBF?

The LTC2312HTS8-12#WTRPBF supports a guaranteed maximum sampling rate of 500ksps across its full operating temperature range (–40°C to +125°C). This rate is maintained with no cycle latency and full AC performance (72.7dB SINAD, –84dB THD) when using the internal reference and proper 2.2µF REF bypass capacitor. At lower rates, the device automatically enters nap mode to reduce supply current.

Does the LTC2312HTS8-12#WTRPBF require an external reference?

No, the LTC2312HTS8-12#WTRPBF includes a factory-trimmed internal reference that outputs 2.048V when VDD is 2.7–3.6V or 4.096V when VDD is 4.75–5.25V. An external reference may be applied to the REF pin if overdriven ≥50mV above the internal value, but it is not required. The internal reference has ≤20ppm/°C drift and is buffered to drive the 2.2µF bypass capacitor.

How does the nap mode function in the LTC2312HTS8-12#WTRPBF?

The LTC2312HTS8-12#WTRPBF automatically enters nap mode after each conversion completes, reducing supply current from 3mA to ~2mA while keeping the internal reference and bandgap active. Wake-up is immediate-conversion can begin on the next CONV rising edge with no recovery delay. Nap mode is distinct from sleep mode (<1µA), which disables the reference and requires 1.1ms for VREF stabilization before accurate conversion.

Is the LTC2312HTS8-12#WTRPBF pin-compatible with other members of the LTC2312 family?

Yes, the LTC2312HTS8-12#WTRPBF shares identical pinout, package (TSOT-23-8), and serial interface timing with all variants in the LTC2312 family-including LTC2312CTS8-12#TRPBF and LTC2312ITS8-12#TRPBF. Differences are limited to temperature grade (H = –40°C to +125°C), packaging (WTRPBF = automotive tape-and-reel), and marking; no PCB layout changes are needed when upgrading from C/I to H grade.

What digital logic levels does the LTC2312HTS8-12#WTRPBF support on its serial interface?

The LTC2312HTS8-12#WTRPBF supports 1.8V, 2.5V, 3V, and 5V logic levels on SCK, CONV, and SDO through its dedicated OVDD pin (1.71–5.25V range). Input thresholds are 0.2×OVDD (low) and 0.8×OVDD (high); SDO output swing tracks OVDD, enabling direct connection to mixed-voltage FPGAs, microcontrollers, or ASICs without level shifters.