Analog Devices Inc. LTC2170CUKG-12#PBF

Overview

LTC2170CUKG-12#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, quad-channel simultaneous-sampling analog-to-digital converter optimized for high-frequency signal digitization in communications and instrumentation systems. It delivers 71dB SNR, 90dB SFDR, 0.15psRMS jitter, 800MHz full-power bandwidth, and operates at 25Msps with 160mW total power consumption on a single 1.8V supply.

For engineers reviewing the LTC2170CUKG-12#PBF datasheet, LTC2170CUKG-12#PBF pinout, LTC2170CUKG-12#PBF application, or LTC2170CUKG-12#PBF equivalent, this page provides verified specifications, package mapping, LVDS serialization modes, input range configuration, and validated alternative options for multichannel data acquisition, software-defined radio, and portable medical imaging designs.

Technical Context

The LTC2170CUKG-12#PBF implements four independent 12-bit ADC cores with shared sample-and-hold and internal clock duty cycle stabilization, enabling undersampling of IF signals up to 140MHz while maintaining 71dB SNR at 70MHz input. Its architecture supports differential or single-ended encode inputs (PECL/LVDS/TTL/CMOS), selectable 1VP-P to 2VP-P input ranges, and external or internal reference operation.

Digital output uses serial LVDS with configurable 1-lane or 2-lane mode per channel, supporting 12-/14-/16-bit serialization and optional on-chip 100Ω termination. The SPI interface enables real-time configuration of power modes (Nap: 75mW, Sleep: 1mW), output current (1.75mA/3.5mA), and data format, with pipeline latency fixed at 6 cycles.

Key Specifications

Pinout & Package

52-pin (7mm × 8mm) plastic QFN package with exposed thermal pad (Pin 53 = 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 quad-channel, 12-bit ADC applications.

Compared with LTC2170CUKG-12#PBF, LTC2171CUKG-12#PBF offers higher throughput at increased power, while AD9253BCPZ-25 trades LVDS integration and jitter performance for simpler interface logic - making LTC2170CUKG-12#PBF optimal for space-constrained, low-jitter, serial-output systems.

Availability

LTC2170CUKG-12#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, portable medical imaging, software-defined radio, and industrial multichannel data acquisition requiring stable component supply and long-term production continuity.

Supply support for LTC2170CUKG-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 acquired Linear Technology in 2017 and maintains its high-performance signal chain product lines with emphasis on precision analog, RF, and mixed-signal ICs for demanding applications.

The LTC2170CUKG-12#PBF belongs to the LTC217x family of quad, simultaneous-sampling ADCs designed specifically for communications infrastructure, instrumentation, and portable medical systems requiring high dynamic range and low power in compact QFN packages.

FAQ

What is the maximum input frequency supported by the LTC2170CUKG-12#PBF?

The LTC2170CUKG-12#PBF features an 800MHz full-power bandwidth sample-and-hold stage, allowing it to accurately digitize analog inputs up to 140MHz while maintaining 71dB SNR and 90dB SFDR. This makes the LTC2170CUKG-12#PBF suitable for undersampling IF signals in communications receivers without external anti-alias filtering beyond the Nyquist limit.

Does the LTC2170CUKG-12#PBF support both internal and external voltage references?

Yes, the LTC2170CUKG-12#PBF supports both internal and external reference configurations. When using the internal reference, VREF outputs 1.250V ±25ppm/°C with 7Ω output resistance. For external reference operation, the SENSE pin accepts 0.625V to 1.300V, enabling precise system-level gain calibration and improved channel-to-channel matching.

How does the LVDS serialization mode affect data throughput and pin usage on the LTC2170CUKG-12#PBF?

The LTC2170CUKG-12#PBF supports 1-lane (1 bit per channel per clock) and 2-lane (2 bits per channel per clock) LVDS serialization. In 2-lane mode, each channel uses two differential pairs (e.g., OUT1A+/– and OUT1B+/–), doubling data rate per clock cycle but requiring eight LVDS pairs total. In 1-lane mode, only four LVDS pairs are used, halving pin count and PCB routing density at the cost of higher serial clock frequency.

What power-saving modes are available on the LTC2170CUKG-12#PBF, and how much power do they consume?

The LTC2170CUKG-12#PBF offers Nap mode (75mW total) and Sleep mode (1mW total). Nap mode retains register settings and reference bias while disabling ADC cores and LVDS drivers; Sleep mode powers down nearly all circuitry except wake-up logic. Both modes are controlled via SPI or parallel pins, and the LTC2170CUKG-12#PBF resumes full operation within microseconds upon exit.

Is the LTC2170CUKG-12#PBF pin-compatible with other members of the LTC217x family?

Yes, the LTC2170CUKG-12#PBF is pin-compatible with LTC2171CUKG-12#PBF and LTC2172CUKG-12#PBF, sharing identical 52-pin QFN packaging, pin functions, and register map. This allows drop-in replacement across 25Msps (LTC2170), 40Msps (LTC2171), and 65Msps (LTC2172) variants without PCB redesign - simplifying platform scalability and inventory management for the LTC2170CUKG-12#PBF and related parts.