Analog Devices Inc. LTC2107CUK#PBF

Overview

LTC2107CUK#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 210Msps high-performance analog-to-digital converter designed for demanding RF receiver front-ends. It delivers 80dBFS SNR, 98dBFS SFDR, and 45fsRMS aperture jitter, enabling direct sampling of IF signals up to 500MHz in software-defined radios and multi-channel GSM base stations.

For engineers reviewing the LTC2107CUK#PBF datasheet, LTC2107CUK#PBF pinout, LTC2107CUK#PBF application, or LTC2107CUK#PBF equivalent, key selection criteria include its dual-mode LVDS/CMOS digital outputs, PGA front-end with selectable 2.4VP-P/1.6VP-P input range, internal dither capability, DDR LVDS timing compliance, and 48-lead 7mm × 7mm QFN package with exposed thermal pad.

Technical Context

The LTC2107CUK#PBF implements a pipeline ADC architecture with integrated sample-and-hold, correction logic, and DDR LVDS or full-rate CMOS output drivers. Its clock duty cycle stabilizer compensates for encode signal asymmetry, while the programmable gain amplifier (PGA) provides two analog input ranges without external components.

Operation is configured via a 3-wire SPI interface or parallel logic pins (PAR/SER mode), supporting features including digital output randomization, internal dither activation, and shutdown control. The VCM output provides a stable 1.2V common-mode bias for differential analog inputs, and SENSE pin selection enables internal or external 1.25V reference operation.

Key Specifications

Pinout & Package

Package: 48-lead (7mm × 7mm) plastic QFN with exposed thermal pad (Pin 49 = GND), rated for 0°C to 70°C operating temperature (C-grade).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9653BCPZ-125 and ADS54J60IRGCT, the LTC2107CUK#PBF uniquely balances 210Msps speed, on-chip PGA flexibility, and dither-assisted SFDR enhancement-making it optimal for cost-sensitive, thermally constrained SDR and base station designs where parallel interface simplicity is preferred.

Availability

LTC2107CUK#PBF is available at Aetrix Electronics and suitable for software-defined radio development, cellular infrastructure prototyping, and test instrumentation requiring stable component supply and guaranteed C-grade temperature performance (0°C to 70°C).

Supply support for LTC2107CUK#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 communications, industrial, automotive, and aerospace markets.

The LTC2107CUK#PBF belongs to ADI's high-speed precision ADC product line, engineered specifically for direct RF sampling in next-generation wireless infrastructure and defense electronics where dynamic range, jitter tolerance, and configurability are critical.

FAQ

What is the maximum input frequency supported by the LTC2107CUK#PBF with acceptable performance?

The LTC2107CUK#PBF supports direct sampling of analog inputs up to 500MHz with maintained performance, enabled by its 45fsRMS aperture jitter specification. At 250MHz input frequency and PGA = 1, it achieves 78.2dBFS SNR and 89.3dBFS SFDR (dither off), confirming usable bandwidth well beyond its 105MHz Nyquist limit due to undersampling capability.

Does the LTC2107CUK#PBF support both LVDS and CMOS digital output interfaces?

Yes, the LTC2107CUK#PBF supports hardware-selectable output modes: full-rate CMOS (up to 100Msps) and double-data-rate LVDS (up to 210Msps). Mode selection is controlled by the PAR/SER pin, with CS determining LVDS current level (3.5mA or 1.75mA) in LVDS mode. CMOS mode is not recommended above 100Msps due to timing closure challenges.

How does the PGA front-end of the LTC2107CUK#PBF affect analog input range and system design?

The LTC2107CUK#PBF's PGA offers two fixed gain settings: 1× (2.4VP-P full-scale) and 1.5× (1.6VP-P full-scale), selected via SCK pin in parallel programming mode. This eliminates external gain stages, simplifies anti-alias filter design, and allows dynamic range optimization for varying signal amplitudes without changing PCB layout or external components.

What is the role of the SENSE pin on the LTC2107CUK#PBF, and how should it be configured?

The SENSE pin on the LTC2107CUK#PBF selects reference mode: tied to GND or VDD enables the internal 1.25V reference; applying 1.25V ±25mV enables external reference mode. This choice affects full-scale accuracy and temperature drift - internal reference yields ±0.85%FS gain error, while external reference improves gain stability to ±0.2%FS but requires precision voltage source.

Can the LTC2107CUK#PBF operate in shutdown mode, and what is its power consumption in that state?

Yes, the LTC2107CUK#PBF enters low-power shutdown mode when SHDN is driven high (2.5V), reducing power dissipation to 6.4mW. In this state, analog circuitry is powered down and all digital outputs enter high-impedance - enabling rapid wake-up (<2µs mid-scale settling) for burst-mode or energy-efficient receiver architectures.