Analog Devices Inc. LTC2163CUK#PBF

Overview

LTC2163CUK#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 80Msps low-power analog-to-digital converter optimized for high-dynamic-range signal digitization in communications and instrumentation systems. It delivers 76.9dB SNR, 90dB SFDR, and ultralow 0.09psRMS jitter at full speed, enabling high-fidelity undersampling of IF signals up to 140MHz with ±2LSB INL and no missing codes over 0°C to 70°C.

For engineers reviewing the LTC2163CUK#PBF datasheet, LTC2163CUK#PBF pinout, LTC2163CUK#PBF application, or LTC2163CUK#PBF equivalent, this page provides verified specifications, QFN-48 pin functions, CMOS/LVDS output configuration options, clock interface flexibility (differential/single-ended ENC±), and real-world use cases in software-defined radio and portable medical imaging.

Technical Context

The LTC2163CUK#PBF implements a fully differential sample-and-hold front-end with 550MHz full-power bandwidth and supports internal or external reference modes via SENSE and VREF pins. Its digital interface offers three configurable output formats: full-rate CMOS, double-data-rate CMOS, or DDR LVDS - each with independent OVDD supply control (1.1V–1.8V).

Configuration is handled via a 3-wire SPI port (CS/SCK/SDI/SDO) or parallel mode using PAR/SER selection, enabling runtime adjustment of clock duty cycle stabilization, data randomization, nap/sleep modes, and input range (1VP-P to 2VP-P). The ENC± inputs accept PECL, LVDS, TTL, or CMOS clock sources without external level-shifting.

Key Specifications

Pinout & Package

48-lead (7mm × 7mm) plastic QFN package with exposed thermal pad (Pin 49 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9268BCPZ-80 and ADS54J60IRGC, the LTC2163CUK#PBF delivers superior SNR/SFDR per milliwatt, built-in clock conditioning, and lower system-level BOM count due to integrated VREF and VCM - making it optimal for space- and power-constrained 80Msps applications.

Availability

LTC2163CUK#PBF is available at Aetrix Electronics and suitable for cellular base stations, portable medical imaging devices, and multichannel data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LTC2163CUK#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 acquired Linear Technology in 2017 and maintains its high-performance signal chain portfolio, emphasizing precision, speed, and power efficiency for demanding analog applications.

The LTC2163CUK#PBF belongs to Linear's ultra-low-jitter, low-power ADC family designed specifically for communications infrastructure, portable test equipment, and high-fidelity data acquisition where dynamic range and thermal constraints are critical.

FAQ

What is the maximum analog input frequency supported by the LTC2163CUK#PBF?

The LTC2163CUK#PBF features a 550MHz full-power analog input bandwidth, allowing it to accurately digitize signals up to 140MHz while maintaining 76.9dB SNR and 90dB SFDR. This makes the LTC2163CUK#PBF suitable for undersampling IF stages in SDR and radar receivers without requiring external anti-alias filtering beyond basic RF bandpassing.

Does the LTC2163CUK#PBF support both differential and single-ended clock inputs?

Yes, the LTC2163CUK#PBF supports both configurations: ENC+ and ENC– can be driven differentially (e.g., LVDS or PECL) or single-ended (with ENC– tied to GND and ENC+ driven by TTL/CMOS). The device maintains 0.09psRMS jitter and full 76.9dB SNR in either mode, as confirmed in the datasheet's timing and dynamic accuracy tables.

How does the LTC2163CUK#PBF manage power in portable applications?

The LTC2163CUK#PBF offers two low-power states: Nap mode draws just 10mW and Sleep mode draws only 1mW, both retaining register settings. At full 80Msps operation with DDR LVDS outputs, it consumes only 108mW - substantially lower than competing 16-bit ADCs. This efficiency directly extends battery life in ultrasound probes and handheld spectrum analyzers using the LTC2163CUK#PBF.

Can the LTC2163CUK#PBF operate with an external reference voltage?

Yes, the LTC2163CUK#PBF supports external reference mode via the SENSE pin (0.625V–1.3V), enabling precise system-level gain calibration and improved temperature stability vs internal reference. When using external reference, the VREF pin becomes high-impedance, and REFL/REFH pins serve as reference inputs - all validated in the "Internal Reference Characteristics" and "Analog Input" sections of the datasheet.

What digital output interfaces does the LTC2163CUK#PBF support?

The LTC2163CUK#PBF supports three digital output configurations: full-rate CMOS, double-data-rate CMOS, and double-data-rate LVDS - selected via SPI or parallel mode. Each uses separate OVDD (1.1V–1.8V) for CMOS or programmable 1.75mA/3.5mA current for LVDS, allowing optimization for noise, power, and routing density in the host FPGA or ASIC design.