Analog Devices Inc. LTC2172CUKG-12#PBF

Overview

LTC2172CUKG-12#PBF from Analog Devices (acquired Linear Technology) is a 12-bit, 65 Msps quad-channel simultaneous-sampling analog-to-digital converter optimized for high-frequency communications signal digitization. It delivers 71 dB SNR, 90 dB SFDR, and 0.15 ps_RMS aperture jitter at full speed, with 800 MHz full-power bandwidth and single 1.8 V supply operation - enabling undersampling of IF signals in cellular base stations and software-defined radios.

For engineers reviewing the LTC2172CUKG-12#PBF datasheet, LTC2172CUKG-12#PBF pinout, LTC2172CUKG-12#PBF application, or LTC2172CUKG-12#PBF equivalent, key selection considerations include its 4-channel synchronization capability, LVDS serial output flexibility (1-/2-lane), internal clock duty cycle stabilizer, and temperature-stable ±0.3 LSB INL over 0°C to 70°C.

Technical Context

The LTC2172CUKG-12#PBF implements four independent 12-bit ADC cores with shared sample-and-hold and internal reference circuitry, supporting differential analog inputs up to 2 V_P-P across 800 MHz bandwidth. Its ultralow-jitter sampling architecture enables high-fidelity undersampling of RF/IF signals without external jitter-cleaning circuits.

Digital interface uses serial LVDS outputs per channel (OUT1A+/– through OUT4B+/–), configurable for 1-bit or 2-bit serialization with programmable output current (1.75 mA or 3.5 mA) and optional on-chip 100 Ω termination. Clock input accepts differential (ENC+/–) or single-ended drive, with an integrated duty cycle stabilizer ensuring performance across 2–100% duty cycles.

Key Specifications

Pinout & Package

Package: 52-lead (7 mm × 8 mm) plastic QFN (UKG), exposed pad (Pin 53) connected to GND and required to be soldered to PCB ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-channel, 12-bit ADC applications.

Compared with AD9233-65EBZ and LTC2262CUK#PBF, the LTC2172CUKG-12#PBF uniquely integrates four synchronized ADCs with internal jitter reduction and LVDS serialization in one 7×8 mm QFN - eliminating inter-IC skew, reducing PCB area by >40%, and removing external clock conditioning components.

Availability

LTC2172CUKG-12#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, software-defined radio development, and portable medical imaging requiring stable component supply and long-term production continuity.

Supply support for LTC2172CUKG-12#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 aerospace, communications, industrial, and healthcare markets.

The LTC2172CUKG-12#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for demanding communications and instrumentation applications where simultaneous multi-channel sampling, low jitter, and low power are critical.

FAQ

What is the operating temperature range for the LTC2172CUKG-12#PBF?

The LTC2172CUKG-12#PBF is specified for commercial-grade operation from 0°C to 70°C. This is confirmed by the "C" grade suffix in the part number and the Order Information table, which lists LTC2172CUKG-12#PBF under the 0°C to 70°C temperature range column. The "I" grade variant (LTC2172IUKG-12#PBF) extends to –40°C to 85°C.

Does the LTC2172CUKG-12#PBF support external voltage reference operation?

Yes, the LTC2172CUKG-12#PBF supports both internal and external reference modes. When using an external reference, the SENSE pin (Pin 32) accepts 0.625 V to 1.300 V, and the REFH/REFL pins (Pins 6–9) are used to connect the external reference source. Gain matching is specified at ±0.2%FS and offset matching at ±3 mV in external reference mode.

How many LVDS data lanes does the LTC2172CUKG-12#PBF support per channel?

The LTC2172CUKG-12#PBF supports two LVDS serialization modes per channel: 1-lane (outputting one bit per clock edge) and 2-lane (outputting two bits per clock edge). Mode selection is controlled via the CS pin in parallel programming mode, and the device maintains full 12-bit resolution in both configurations.

What is the significance of the "UKG" package designation in LTC2172CUKG-12#PBF?

"UKG" denotes the 52-lead, 7 mm × 8 mm plastic QFN package with exposed thermal pad (Pin 53), as defined in Linear Technology's packaging nomenclature. This package provides low thermal resistance and compact footprint - essential for high-density RF front-end layouts where the LTC2172CUKG-12#PBF is commonly deployed.

Can the LTC2172CUKG-12#PBF operate with a single-ended encode clock input?

Yes, the LTC2172CUKG-12#PBF supports single-ended encode clock operation by tying ENC– (Pin 18) to GND and driving ENC+ (Pin 17) with a 1.8 V square wave or sine wave. The datasheet specifies VIH = 1.2 V and VIL = 0.6 V for this mode, and the internal duty cycle stabilizer remains active to maintain timing accuracy.