Analog Devices Inc. DC1500A-A

Overview

LTC2393-16 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), and 94.2 dB SNR (typ) at 20 kHz - designed for high-dynamic-range data acquisition in medical imaging and industrial process control systems.

For engineers reviewing the LTC2393-16 datasheet, LTC2393-16 pinout, LTC2393-16 application, or LTC2393-16 equivalent, key selection considerations include guaranteed 16-bit no-missing-codes operation, internal 4.096 V reference with ±20 ppm/°C tempco, dual parallel/serial interface support, and 48-lead QFN/LQFP packaging compatible with high-speed signal chain designs.

Technical Context

The LTC2393-16 employs a charge-redistribution SAR architecture with internal oscillator-based timing, eliminating external clock dependency and ensuring zero cycle latency in both serial and parallel modes. Its differential input stage supports true bipolar sampling with ±V_REF swing and 50 MHz –3 dB input bandwidth.

Conversion is initiated by a falling edge on CNVST; acquisition time is 385 ns and conversion time is 600 ns, enabling full 1 Msps throughput. The device integrates a buffered 4.096 V reference (±0.5% initial accuracy) and supports external reference via REFIN/REFSENSE, with internal reference buffer impedance of 2.6 kΩ and input impedance of 85 kΩ.

Key Specifications

Pinout & Package

Available in two RoHS-compliant 48-lead packages: 7 mm × 7 mm plastic QFN (UK) and 7 mm × 7 mm plastic LQFP (LX), both with exposed thermal pad (GND) for enhanced thermal performance. Operating junction temperature up to 125°C (H-grade) or 150°C (LQFP max rating).

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 LTC2393-16 uniquely combines single-channel 94.2 dB SNR, hardware-selectable serial/parallel interface, and integrated 4.096 V reference - making it optimal for space-constrained, high-fidelity systems where reference stability and interface flexibility are critical.

Availability

LTC2393-16 is available at Aetrix Electronics and suitable for medical imaging, industrial process control, and high-speed data acquisition requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LTC2393-16 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 LTC2393-16 belongs to ADI's precision SAR ADC product line, engineered for applications demanding high speed, low noise, and guaranteed 16-bit linearity without missing codes - especially where thermal robustness and reference integration reduce system complexity.

FAQ

What is the maximum operating temperature grade available for the LTC2393-16?

The LTC2393-16 is offered in H-grade (–40°C to +125°C) for the LQFP package (LTC2393HLX-16), with junction temperature limit of 150°C. This makes the LTC2393-16 suitable for under-hood automotive subsystems and high-temperature industrial environments where sustained reliability is required.

Does the LTC2393-16 require an external clock for conversion timing?

No, the LTC2393-16 includes an internal oscillator that sets conversion timing, eliminating the need for an external clock source. This simplifies system design and improves timing jitter performance - the LTC2393-16 achieves 7 ps RMS aperture jitter independent of external clock quality.

Can the LTC2393-16 operate with a 3.3 V I/O supply while using a 5 V analog supply?

Yes, the LTC2393-16 supports independent I/O voltage (OVP) from 1.8 V to 5 V, while AVP and DVP remain at 4.75 V to 5.25 V. This allows direct interfacing with 3.3 V FPGAs or microcontrollers without level shifters - a key capability confirmed in the LTC2393-16 datasheet Section "Digital Inputs and Outputs".

How does the BYTESWAP function affect data output ordering on the LTC2393-16?

When BYTESWAP = low, D15–D0 appear on pins 28–9 (MSB-first). When BYTESWAP = high, upper and lower bytes are swapped: D7–D0 appear on pins 28–21 and D15–D8 appear on pins 16–9. This feature enables native alignment with 8-bit microcontroller buses without software byte reordering - a documented behavior in LTC2393-16 Pin Functions.

Is the internal reference of the LTC2393-16 enabled by default, or does it require configuration?

The internal reference is enabled by connecting REFOUT to REFIN - no register writes or configuration sequences are needed. The LTC2393-16 datasheet specifies this as the standard connection for internal reference use, and REFSENSE must be left floating. This hardware-configured approach ensures deterministic startup and eliminates firmware dependencies for the LTC2393-16.