Analog Devices Inc. LTC2220CUP#PBF

Overview

LTC2220CUP#PBF from Analog Devices (acquired Linear Technology) is a 12-bit, 170Msps analog-to-digital converter optimized for high-frequency signal digitization in communications infrastructure. It delivers 67.5dB SNR and 80dB SFDR up to 170MHz input frequency, with ultralow 0.15psRMS aperture jitter, enabling undersampling of IF signals in wireless base stations and cable head-end systems.

For engineers reviewing the LTC2220CUP#PBF datasheet, LTC2220CUP#PBF pinout, LTC2220CUP#PBF application, or LTC2220CUP#PBF equivalent, key selection considerations include its 64-pin QFN package, dual LVDS/CMOS output flexibility, ±0.5V or ±1V selectable input range, clock duty cycle stabilizer, and support for shutdown/nap modes in single 3.3V supply operation.

Technical Context

The LTC2220CUP#PBF employs a 12-bit pipelined ADC core with integrated sample-and-hold, correction logic, and flexible reference architecture. Its 775MHz full-power bandwidth supports wideband RF/IF sampling, while internal 1.6V VCM bias and SENSE pin programmability enable precise analog input range configuration.

Digital interface options include differential LVDS outputs or three CMOS formats: full-rate single bus, or demultiplexed interleaved/simultaneous-update dual buses. Clock inputs accept differential (LVDS, PECL) or single-ended (TTL, CMOS) signals, with optional duty cycle stabilization ensuring consistent timing performance across varying clock sources.

Key Specifications

Pinout & Package

64-pin 9mm × 9mm plastic QFN package with exposed thermal pad (Pin 65 = GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9230-170EBZ, the LTC2220CUP#PBF integrates reference and duty cycle stabilization, reducing BOM count and layout complexity; compared with LTC2221CUP#PBF, it delivers higher sample rate and SNR at the cost of +230mW power, making it optimal for demanding wideband IF sampling.

Availability

LTC2220CUP#PBF is available at Aetrix Electronics and suitable for wireless infrastructure, cable head-end systems, and communications test equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for LTC2220CUP#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 industrial, automotive, communications, and healthcare markets.

The LTC2220CUP#PBF belongs to ADI's high-speed precision ADC product line, engineered specifically for demanding communications infrastructure applications requiring wide bandwidth, low jitter, and flexible digital interfacing.

FAQ

What is the operating temperature range for the LTC2220CUP#PBF?

The LTC2220CUP#PBF is rated for commercial temperature operation from 0°C to 70°C. This grade is validated for use in controlled-environment applications such as indoor base station equipment, lab-grade test instruments, and cable head-end rack systems where ambient thermal conditions remain within specification limits.

Does the LTC2220CUP#PBF support both differential and single-ended analog inputs?

The LTC2220CUP#PBF is designed for differential analog input operation using AIN+ and AIN– pins. While the datasheet specifies differential input performance (e.g., 67.5dB SNR, ±0.4LSB INL), single-ended input configurations are not characterized or guaranteed - the LTC2220CUP#PBF must be used with a differential input signal or external transformer/balun to maintain specified AC performance.

How does the SENSE pin configure input range on the LTC2220CUP#PBF?

The SENSE pin on the LTC2220CUP#PBF directly programs the full-scale input range: connection to VCM selects ±0.5V, to VDD selects ±1V, and to an external 0.5–1V reference selects ±VSENSE. This hardware-based configuration eliminates software register writes and ensures deterministic analog input scaling at power-up, critical for deterministic signal chain calibration in production systems.

Can the LTC2220CUP#PBF operate with a 2.5V OVDD supply in CMOS output mode?

Yes, the LTC2220CUP#PBF supports OVDD from 0.5V to 3.6V in CMOS output mode. At OVDD = 2.5V, VOH is guaranteed ≥2.49V and VOL ≤0.09V under 1.6mA load, enabling direct interfacing with 2.5V logic families without level-shifting. This flexibility allows coexistence with mixed-voltage FPGA I/O banks while maintaining noise margin and timing margins.

What is the pipeline latency of the LTC2220CUP#PBF, and how does it impact system synchronization?

The LTC2220CUP#PBF has a fixed pipeline latency of 5 clock cycles in all output modes (LVDS, full-rate CMOS, demux interleaved). In demux simultaneous mode, latency is 5 and 6 cycles across A/B buses. This deterministic delay enables precise time-of-arrival alignment in multi-ADC systems and simplifies FPGA-based timestamp compensation in real-time signal processing pipelines.