Analog Devices Inc. LTC2315HTS8-12#WTRPBF

Overview

LTC2315HTS8-12#WTRPBF 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 to 5.25 V analog supply, integrates a low-drift (≤20 ppm/°C) internal reference (2.048 V or 4.096 V), and delivers 72.6 dB SINAD and –84 dB THD at 500 kHz input frequency. It is used in high-speed data acquisition systems requiring compact size, low power, and guaranteed 12-bit no-missing-codes performance over –40°C to 125°C.

For engineers reviewing the LTC2315HTS8-12#WTRPBF datasheet, LTC2315HTS8-12#WTRPBF pinout, LTC2315HTS8-12#WTRPBF application, or LTC2315HTS8-12#WTRPBF equivalent, key selection considerations include its 5 Msps throughput with 1-cycle latency, dual-supply flexibility (VDD = 2.7–5.25 V, OVDD = 1.71–5.25 V), nap/sleep power modes (<1 µA sleep current), and operation across extended industrial temperature range.

Technical Context

The LTC2315HTS8-12#WTRPBF implements a SAR architecture with integrated bandgap reference and reference buffer, automatically selecting 2.048 V span for VDD = 2.7–3.6 V or 4.096 V span for VDD = 4.75–5.25 V. Its timing logic supports three SCK configurations-SCK-high-during-acquisition (enabling full 5 Msps), SCK-low-during-acquisition, and continuous SCK-with minimum tACQ = 40 ns and tCONV = 160 ns.

It features a 3-wire SPI-compatible serial interface (CS, SCK, SDO) with OVDD-referenced I/O, enabling interoperability with 1.8 V, 2.5 V, 3.3 V, or 5 V host logic. Power management includes nap mode (1.8 mA, fast wake-up <1 conversion) and sleep mode (0.8 µA typical, 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), RoHS-compliant, lead-free finish.

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 LTC2315HTS8-12#WTRPBF uniquely combines 5 Msps speed, integrated auto-ranging reference, and –40°C to +125°C operation in an 8-lead TSOT-23 package-making it optimal for space-constrained, high-reliability embedded systems requiring both speed and thermal robustness.

Availability

LTC2315HTS8-12#WTRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition, battery-operated instrumentation, and automotive subsystems requiring stable component supply across extended temperature ranges.

Supply support for LTC2315HTS8-12#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC2315HTS8-12#WTRPBF belongs to ADI's high-speed precision SAR ADC product line, designed specifically for compact, low-power, wide-temperature applications where integration, reliability, and ease of use are critical-such as portable test equipment and ruggedized sensing nodes.

FAQ

What is the maximum sampling rate of the LTC2315HTS8-12#WTRPBF, and under what conditions is it achieved?

The LTC2315HTS8-12#WTRPBF achieves a maximum sampling rate of 5 Msps when using the SCK-high-during-acquisition timing configuration (Figure 6 in the datasheet), with minimum tACQ = 40 ns and tCONV = 160 ns. This requires an SCK frequency of 87.5 MHz and proper adherence to timing parameters t2 and t10. Other timing modes yield lower throughput (e.g., 4.86 Msps).

Does the LTC2315HTS8-12#WTRPBF require an external reference voltage?

No, the LTC2315HTS8-12#WTRPBF includes an integrated reference buffer that automatically outputs either 2.048 V (when VDD = 2.7–3.6 V) or 4.096 V (when VDD = 4.75–5.25 V). An external reference is optional and only needed if a different reference voltage or tighter initial accuracy is required.

How does the nap mode of the LTC2315HTS8-12#WTRPBF differ from sleep mode in terms of wake-up time and power consumption?

Nap mode draws 1.8 mA and allows wake-up and valid conversion within one SCK cycle, as the internal reference remains active. Sleep mode draws <1 µA typical but requires 1.1 ms for VREF recovery after wake-up due to shutdown of the bandgap and reference buffer-making nap mode ideal for burst sampling, and sleep mode best for long idle periods.

Can the LTC2315HTS8-12#WTRPBF interface directly with a 1.8 V microcontroller?

Yes-the LTC2315HTS8-12#WTRPBF supports OVDD = 1.71–5.25 V, so setting OVDD = 1.8 V configures CS, SCK, and SDO logic levels to 1.8 V compatible thresholds. The analog supply (VDD) may remain at 3.3 V or 5 V independently, enabling seamless interfacing without level-shifting circuitry.

What is the guaranteed operating temperature range for the LTC2315HTS8-12#WTRPBF?

The LTC2315HTS8-12#WTRPBF is specified and tested for continuous operation from –40°C to +125°C (H-grade), making it suitable for under-hood automotive, industrial motor control, and outdoor infrastructure applications where extended thermal performance is mandatory.