Analog Devices Inc. LTC2393IUK-16#PBF

Overview

LTC2393IUK-16#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 1 Msps successive approximation register (SAR) analog-to-digital converter with ±4.096 V fully differential input range, ±2 LSB INL (max), 94.2 dB SNR (typ), and integrated 4.096 V reference. It operates from a single 5 V supply and supports 1.8 V to 5 V I/O, making it suitable for high-fidelity data acquisition in industrial instrumentation and medical imaging systems.

For engineers reviewing the LTC2393IUK-16#PBF datasheet, LTC2393IUK-16#PBF pinout, LTC2393IUK-16#PBF application, or LTC2393IUK-16#PBF equivalent, key selection considerations include guaranteed 16-bit no-missing-codes operation, internal reference tempco of ±20 ppm/°C (I-grade), absence of pipeline delay, dual parallel/serial interface flexibility, and QFN-48 thermal performance at –40°C to +85°C.

Technical Context

The LTC2393IUK-16#PBF implements a charge-redistribution SAR architecture with a precision internal 4.096 V reference buffered by a low-drift amplifier. Its conversion cycle begins on CNVST falling edge, uses an internal oscillator for timing (600 ns conversion time), and delivers results with zero cycle latency in both parallel and serial modes.

It features fully differential analog inputs with 50 Ω switch resistance and 45 pF sampling capacitance, common-mode rejection >70 dB, and support for offset binary or two's complement output formats via OB/2C control. The device includes dedicated power domains (AVP, DVP, OVP) and independent ground planes (GND, OGND) to minimize noise coupling between analog and digital sections.

Key Specifications

Pinout & Package

Package: 48-lead 7 mm × 7 mm plastic QFN (exposed pad, Pin 49 = GND). Thermal resistance θ_JA = 29°C/W; requires soldered exposed pad for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed SAR ADC applications.

Compared with AD7606C-16 and ADS8860, the LTC2393IUK-16#PBF uniquely combines single-channel 94.2 dB SNR, integrated ±20 ppm/°C reference, zero-latency parallel/serial interface, and industrial temperature grade - making it optimal for precision, thermally stable, single-signal digitization where reference autonomy and timing determinism are critical.

Availability

LTC2393IUK-16#PBF is available at Aetrix Electronics and suitable for medical imaging signal chains, high-speed industrial data acquisition, and automated test equipment requiring stable component supply with guaranteed long-term manufacturability.

Supply support for LTC2393IUK-16#PBF 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 LTC2393IUK-16#PBF belongs to ADI's precision SAR ADC product line, engineered for applications demanding high DC accuracy, low noise, and deterministic timing - especially where internal reference integration and wide temperature operation are essential.

FAQ

What is the operating temperature range for the LTC2393IUK-16#PBF?

The LTC2393IUK-16#PBF is rated for operation from –40°C to +85°C (I-grade), with guaranteed parametric performance including ±2 LSB INL, 94.2 dB SNR, and ±20 ppm/°C reference tempco across this full range. This makes it suitable for industrial environments without active thermal management.

Does the LTC2393IUK-16#PBF require an external reference?

No - the LTC2393IUK-16#PBF includes a precision internal 4.096 V reference with ±0.5% initial accuracy and ±20 ppm/°C max tempco. To use it, connect REFOUT to REFIN and leave REFSENSE floating. An external reference (e.g., LT1790-4.096) may be used for higher accuracy, but is not required for full datasheet specifications.

How does the LTC2393IUK-16#PBF handle interface selection between parallel and serial modes?

The LTC2393IUK-16#PBF uses the SER/PAR pin (Pin 4): logic low enables 16-bit parallel output on D0–D15; logic high configures serial mode with SDOUT (Pin 23), SCLK (Pin 24), and SDIN (Pin 22). In serial mode, non-active parallel outputs enter high-impedance state, eliminating bus contention.

What power supply requirements does the LTC2393IUK-16#PBF have?

The LTC2393IUK-16#PBF requires three independent supplies: AVP (4.75–5.25 V, analog), DVP (4.75–5.25 V, digital core), and OVP (1.8–5 V, I/O interface). Each domain must be decoupled locally - AVP/DVP with 0.1 μF + 10 μF ceramics, OVP with 4.7 μF ceramic - to maintain SNR and timing integrity.

Can the LTC2393IUK-16#PBF be used with single-ended input signals?

Yes - though optimized for differential inputs, the LTC2393IUK-16#PBF can digitize single-ended signals using an external driver such as the LT6350 configured for single-ended-to-differential conversion. This preserves 94.2 dB SNR and avoids gain/phase mismatch errors inherent in discrete resistor networks.