Analog Devices Inc. LTC2313CTS8-14#TRMPBF

Overview

LTC2313CTS8-14#TRMPBF from Analog Devices (formerly Linear Technology) is a 14-bit, 2.5 Msps successive approximation register (SAR) analog-to-digital converter in an 8-lead TSOT-23 package. It operates from a single 3V or 5V analog supply, integrates a low-drift (20 ppm/°C max) internal reference (2.048 V or 4.096 V), and delivers 77 dB SINAD and –85 dB THD at full speed-enabling high-fidelity signal digitization in space-constrained, low-power systems such as portable medical sensors and battery-powered data loggers.

For engineers reviewing the LTC2313CTS8-14#TRMPBF datasheet, LTC2313CTS8-14#TRMPBF pinout, LTC2313CTS8-14#TRMPBF application, or LTC2313CTS8-14#TRMPBF equivalent, key selection criteria include guaranteed no missing codes, nap/sleep mode power management, SPI-compatible 3-wire serial interface with 1.8–5 V OVDD compatibility, and operation across 0°C to 70°C (Commercial grade).

Technical Context

The LTC2313CTS8-14#TRMPBF implements a SAR architecture with integrated reference buffer and internal oscillator timing. Its conversion cycle comprises 175 ns acquisition time followed by 225 ns conversion time, achieving zero-cycle latency and deterministic 400 ns minimum throughput. The device uses separate analog (VDD) and digital I/O (OVDD) supplies to isolate noise-sensitive analog circuitry from digital switching transients.

Reference voltage is auto-selected: 2.048 V when VDD = 2.7–3.6 V, or 4.096 V when VDD = 4.75–5.25 V. The REF pin supports overdrive for external reference use. SDO output is three-state controlled by CONV, with MSB output on CONV falling edge and remaining bits clocked out on SCK falling edges-ensuring precise timing control for FPGA or microcontroller interfacing.

Key Specifications

Pinout & Package

Package: 8-lead TSOT-23 (0.65 mm pitch), 2.9 mm × 1.6 mm footprint, exposed pad optional for thermal enhancement. RoHS-compliant, lead-free finish (Pb-free).

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 LTC2313CTS8-14#TRMPBF uniquely combines 2.5 Msps speed, dual-voltage (3 V/5 V) operation, integrated dual-range reference, and nap/sleep power states-making it optimal for portable, multi-supply, high-dynamic-range applications where board space and power budget are constrained.

Availability

LTC2313CTS8-14#TRMPBF is available at Aetrix Electronics and suitable for portable medical devices, battery-powered data acquisition systems, and industrial motor control applications requiring stable component supply, traceable sourcing, and lifecycle continuity.

Supply support for LTC2313CTS8-14#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 semiconductors, formed through the acquisition of Linear Technology in 2017.

The LTC2313-14 belongs to ADI's precision SAR ADC product line, designed specifically for high-speed, low-power, space-constrained applications demanding excellent AC performance and integrated reference stability without external components.

FAQ

What is the maximum sampling rate supported by the LTC2313CTS8-14#TRMPBF?

The LTC2313CTS8-14#TRMPBF supports a guaranteed maximum sampling rate of 2.5 Msps across its full operating temperature range (0°C to 70°C). This rate is achieved with a minimum throughput time of 400 ns and requires SCK frequencies up to 90 MHz. At lower sampling rates, the device automatically enters nap mode to reduce average power consumption while maintaining full specification compliance.

Does the LTC2313CTS8-14#TRMPBF require an external reference voltage?

No, the LTC2313CTS8-14#TRMPBF does not require an external reference voltage-it integrates a low-drift (20 ppm/°C max) reference that 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 can be overdriven with an external reference ≥ V_REF + 50 mV if higher precision or different voltage scaling is needed, but this is optional-not required-for standard operation of the LTC2313CTS8-14#TRMPBF.

How does the nap mode function in the LTC2313CTS8-14#TRMPBF?

Nap mode in the LTC2313CTS8-14#TRMPBF activates automatically after each conversion completes, reducing supply current to approximately 2 mA while retaining reference buffer and bandgap bias. Wake-up is near-instantaneous (<50 ns), allowing the next conversion to begin immediately without settling delay. This behavior makes the LTC2313CTS8-14#TRMPBF highly efficient for burst-mode or irregular sampling patterns common in sensor monitoring and event-triggered acquisition.

Can the LTC2313CTS8-14#TRMPBF interface directly with a 1.8 V microcontroller?

Yes, the LTC2313CTS8-14#TRMPBF can interface directly with a 1.8 V microcontroller using its dedicated OVDD pin, which accepts 1.71–5.25 V logic supplies. When OVDD = 1.8 V, all digital inputs (CONV, SCK) and output (SDO) operate at 1.8 V logic levels-eliminating the need for external level shifters. The analog supply (VDD) remains independent (3 V or 5 V), preserving SNR and dynamic range while enabling seamless mixed-voltage system integration.

What is the absolute input voltage range for the AIN pin of the LTC2313CTS8-14#TRMPBF?

The absolute input voltage range for the AIN pin of the LTC2313CTS8-14#TRMPBF is –0.05 V to VDD + 0.05 V, per Absolute Maximum Ratings. However, the functional input range is 0 V to VREF (2.048 V or 4.096 V), as defined by the internal reference. Exceeding the functional range results in clipped output codes, while violating the absolute ratings risks permanent damage. For optimal linearity and SNR, AIN should remain within 0 V to VREF with source impedance ≤ 50 Ω.