Analog Devices Inc. LTC2393CLX-16#PBF

Overview

LTC2393CLX-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-speed data acquisition in medical imaging and industrial process control systems.

For engineers reviewing the LTC2393CLX-16#PBF datasheet, LTC2393CLX-16#PBF pinout, LTC2393CLX-16#PBF application, or LTC2393CLX-16#PBF equivalent, key selection criteria include guaranteed 16-bit no-missing-codes operation, internal reference tempco (±20 ppm/°C max), parallel/serial interface flexibility, 600 ns conversion time, and LQFP-48 package compatibility with 0°C to 70°C industrial temperature range.

Technical Context

The LTC2393CLX-16#PBF employs a charge redistribution capacitor DAC architecture with differential comparator and internal oscillator–driven timing, eliminating external clock dependencies. Its acquisition time is 385 ns and conversion time is 600 ns, enabling true 1 Msps throughput with zero cycle latency in both parallel and serial modes.

It features dual-reference support: internal 4.096 V reference (0.5% initial accuracy, ±20 ppm/°C max tempco) or external reference via REFIN/REFSENSE pins. Input common-mode range is VREF/2 ± 50 mV, and analog input impedance is modeled as 50 Ω in series with 45 pF during sampling.

Key Specifications

Pinout & Package

Package: 48-lead 7 mm × 7 mm plastic LQFP (LX package), lead-free, RoHS-compliant, operating temperature range 0°C to 70°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7626BCPZ-RL7 and LTC2380-16IUK#PBF, the LTC2393CLX-16#PBF uniquely combines LQFP-48 packaging, 0°C to 70°C commercial grade, integrated reference with ±20 ppm/°C tempco, and ultra-low-latency parallel/serial interface - optimizing for cost-sensitive, space-constrained industrial DAQ designs where 1 Msps suffices.

Availability

LTC2393CLX-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, long-term obsolescence planning, and consistent lot-to-lot parametric performance.

Supply support for LTC2393CLX-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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and DSP solutions, serving industrial, automotive, communications, and healthcare markets.

The LTC2393-16 product line was designed for high-fidelity, low-latency data acquisition in demanding instrumentation and control systems - emphasizing DC accuracy, AC performance, and ease of integration via integrated reference and flexible digital interfaces.

FAQ

What is the absolute maximum input voltage for LTC2393CLX-16#PBF analog inputs?

The absolute maximum analog input voltage for LTC2393CLX-16#PBF is (AVP + 0.3 V) at IN+ and IN–, with minimum of (GND – 0.3 V). For AVP = 5 V, this defines a safe operating range of –0.3 V to +5.3 V per pin. Differential input voltage must stay within ±VREF (±4.096 V) to avoid clipping or specification violation. Exceeding these limits risks latch-up or permanent damage per Absolute Maximum Ratings.

Does LTC2393CLX-16#PBF support both offset binary and two's complement output formats?

Yes, LTC2393CLX-16#PBF supports both output formats via the OB/2C pin (Pin 6). When OB/2C is high, the 16-bit parallel or serial output is in offset binary format (0x0000 = –VREF, 0xFFFF = +VREF – 1 LSB). When low, MSB inversion yields two's complement format (0x8000 = 0 V, 0xFFFF = –1 LSB, 0x0000 = –VREF). This allows direct compatibility with DSPs or FPGAs expecting either coding scheme.

Can LTC2393CLX-16#PBF operate with a 3.3 V I/O supply?

Yes, LTC2393CLX-16#PBF supports 1.8 V to 5 V I/O voltage via the OVP pin (Pin 18). Setting OVP = 3.3 V configures all digital outputs (D0–D15, BUSY, RD, etc.) and inputs (CS, RD, CNVST, SER/PAR) to 3.3 V logic levels, while AVP and DVP remain at 5 V for analog/digital core operation. This enables seamless interfacing with 3.3 V FPGAs or microcontrollers without level shifters.

What is the purpose of the BYTESWAP pin on LTC2393CLX-16#PBF?

The BYTESWAP pin (Pin 8) controls byte ordering of the 16-bit parallel output. With BYTESWAP low, D15–D0 appear on Pins 28–9 (MSB-first). With BYTESWAP high, upper and lower bytes are swapped: D7–D0 appear on Pins 28–21, and D15–D8 appear on Pins 16–9. This matches native byte order expectations of ARM or x86 processors, avoiding software byte-reversal overhead in firmware.

How does the internal reference of LTC2393CLX-16#PBF achieve its ±20 ppm/°C tempco?

The LTC2393CLX-16#PBF internal reference uses a curvature-corrected bandgap core with laser-trimmed resistive networks and on-chip temperature compensation circuitry. Its ±20 ppm/°C (max) tempco is guaranteed over the full 0°C to 70°C operating range, verified per production test. The 4.096 V nominal output (4.076 V to 4.116 V) is buffered and isolated from load variations, ensuring stable ADC full-scale calibration without external components.