Analog Devices Inc. LTC2222CUK-11#TRPBF

Overview

LTC2222CUK-11#TRPBF from Analog Devices (formerly Linear Technology) is an 11-bit, 105Msps pipelined analog-to-digital converter optimized for high-frequency communication signal digitization. It delivers 65.4dB SNR at 140MHz input, 80dB SFDR up to 150MHz, and 775MHz full-power bandwidth with 0.15psRMS aperture jitter - enabling undersampling of IF signals in wireless infrastructure and test equipment.

For engineers reviewing the LTC2222CUK-11#TRPBF datasheet, LTC2222CUK-11#TRPBF pinout, LTC2222CUK-11#TRPBF application, or LTC2222CUK-11#TRPBF equivalent, key selection considerations include its ±0.5V/±1V selectable input range, CMOS output swing (0.5V–3.3V), clock duty cycle stabilizer, and 48-pin 7mm × 7mm QFN package with exposed thermal pad.

Technical Context

The LTC2222CUK-11#TRPBF employs a five-stage CMOS pipelined ADC architecture with digital correction logic, achieving no missing codes and 5-cycle pipeline latency. Its sample-and-hold circuit features 1.6pF sampling capacitors and supports differential or single-ended analog drive with 1.6V common-mode bias via VCM pin.

It integrates flexible reference control (internal 1.6V bandgap + external SENSE programming), separate OVDD-supplied CMOS output drivers, and dual power domains (3.3V VDD analog supply, 0.5–3.3V OVDD output supply). Clock inputs accept PECL/LVDS/TTL/CMOS, and optional duty cycle stabilization maintains performance across non-50% clock waveforms.

Key Specifications

Pinout & Package

Package: 48-lead 7mm × 7mm plastic QFN with exposed thermal pad (Pin 49 = GND), RoHS-compliant and lead-free (#TRPBF).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LTC2222IUK-11#TRPBF, the LTC2222CUK-11#TRPBF offers identical performance in a cost-optimized commercial-grade package; versus AD9222BCPZ-105, it provides superior high-frequency SFDR and integrated reference programming at the expense of slightly lower mid-band SNR.

Availability

LTC2222CUK-11#TRPBF is available at Aetrix Electronics and suitable for wireless infrastructure, cable head-end systems, and communications test equipment requiring stable component supply with traceable sourcing and long-term lifecycle support.

Supply support for LTC2222CUK-11#TRPBF 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 semiconductors, serving precision instrumentation, communications, and industrial markets.

The LTC2222 family was designed specifically for demanding communications applications requiring high dynamic range at IF frequencies - emphasizing low jitter, flexible input scaling, and robust thermal packaging for RF front-end integration.

FAQ

What is the maximum sampling rate supported by the LTC2222CUK-11#TRPBF?

The LTC2222CUK-11#TRPBF supports a maximum sampling rate of 105Msps, as specified in its absolute maximum ratings and validated across temperature. This rate is maintained with full AC performance (65.4dB SNR, 80dB SFDR) when using differential clock inputs and proper power supply decoupling per the datasheet layout guidelines. Operation above 105Msps is not guaranteed and may result in increased missing codes or degraded linearity.

Does the LTC2222CUK-11#TRPBF require an external reference voltage?

No, the LTC2222CUK-11#TRPBF includes an internal 1.6V bandgap reference and supports fully self-contained operation. The SENSE pin allows selection of ±0.5V or ±1V input ranges by tying to VCM or VDD respectively. An external reference can be applied to SENSE only if a custom input range between ±0.5V and ±1V is needed - no external reference IC is required for standard configurations.

How does the CLOCKOUT signal function in the LTC2222CUK-11#TRPBF?

The CLOCKOUT pin on the LTC2222CUK-11#TRPBF provides a data-valid strobe synchronized to the internal sampling clock. Data bits D0–D10 are latched on the falling edge of CLOCKOUT, with guaranteed skew of ±0.6ns relative to data. This eliminates setup/hold timing uncertainty in FPGA or ASIC interfaces, enabling reliable capture without additional delay calibration - a key advantage over asynchronous output schemes.

Can the LTC2222CUK-11#TRPBF operate with single-ended analog inputs?

Yes, the LTC2222CUK-11#TRPBF supports single-ended analog drive: connect AIN+ to the signal source and AIN– to the 1.6V VCM pin. However, this degrades harmonic distortion (SFDR drops ~3–5dB) and integral linearity (INL increases to ±0.5LSB), while preserving SNR and DNL. Differential drive is strongly recommended for communications applications where spectral purity is critical.

What thermal management is required for continuous operation of the LTC2222CUK-11#TRPBF?

The LTC2222CUK-11#TRPBF dissipates 475mW at 105Msps and has a θJA of 29°C/W. To maintain junction temperature ≤125°C at 70°C ambient, the exposed thermal pad (Pin 49) must be soldered to a minimum 200mm² copper pour connected to internal ground planes. Use ≥4 thermal vias (0.3mm diameter) under the pad, and avoid placing components directly beneath the QFN footprint to ensure adequate convection cooling.