Analog Devices Inc. LTC2240CUP-12#PBF

Overview

LTC2240CUP-12#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 170 Msps pipelined analog-to-digital converter optimized for high-frequency signal digitization in communications systems. It delivers 65.6 dB SNR, 80 dB SFDR at 10 MHz input, and ultralow 95 fs_RMS aperture jitter, enabling high-fidelity IF undersampling in wireless infrastructure and cable head-end equipment.

For engineers reviewing the LTC2240CUP-12#PBF datasheet, LTC2240CUP-12#PBF pinout, LTC2240CUP-12#PBF application, or LTC2240CUP-12#PBF equivalent, key selection criteria include its 1.2 GHz full-power bandwidth, dual-mode LVDS/CMOS output flexibility, ±0.5 V or ±1 V selectable input range, and support for clock duty cycle stabilization - all in a thermally enhanced 64-pin 9 mm × 9 mm QFN package.

Technical Context

The LTC2240CUP-12#PBF employs a five-stage pipelined ADC architecture with integrated sample-and-hold, correction logic, and flexible reference buffering. Its differential analog input path supports up to 1.2 GHz full-power bandwidth, while the low-jitter encode interface accepts PECL, LVDS, TTL, or CMOS clocks with optional duty cycle stabilization.

Digital output configuration is fully programmable via LVDS and MODE pins: LVDS mode enables differential 12-bit outputs; CMOS mode supports full-rate (12-bit bus @ 170 MHz) or demultiplexed (two 6-bit buses @ 85 MHz) formats with interleaved or simultaneous update timing. Internal 1.25 V VCM bias and SENSE-pin-programmable input range further enhance system-level design adaptability.

Key Specifications

Pinout & Package

Package: 64-lead plastic QFN (9 mm × 9 mm), exposed pad (Pin 65) soldered to GND for thermal and electrical integrity. Operating temperature range: 0°C to 70°C (C-grade).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9230-12, the LTC2240CUP-12#PBF offers native 2.5 V operation and built-in duty cycle correction - reducing external component count and improving robustness in noisy clock environments. Versus LTC2241-12, it provides identical functionality at lower power (445 mW vs ~520 mW) and cost, making it ideal for fixed-bandwidth deployments.

Availability

LTC2240CUP-12#PBF is available at Aetrix Electronics and suitable for wireless infrastructure, cable head-end systems, and RF test equipment requiring stable component supply, long-term obsolescence management, and RoHS-compliant lead-free packaging.

Supply support for LTC2240CUP-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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies for precision and high-speed applications.

The LTC2240CUP-12#PBF belongs to Linear Technology's high-speed ADC product line, engineered specifically for demanding communications infrastructure where dynamic range, jitter performance, and flexible digital interfacing are critical.

FAQ

What is the operating temperature range for the LTC2240CUP-12#PBF?

The LTC2240CUP-12#PBF is rated for commercial temperature operation from 0°C to 70°C. This C-grade variant is optimized for indoor infrastructure applications such as base station radios and lab-grade test equipment where ambient thermal conditions are controlled. Industrial-grade alternatives (e.g., LTC2240IUP-12#PBF) extend to –40°C to +85°C.

Does the LTC2240CUP-12#PBF support both LVDS and CMOS digital outputs?

Yes, the LTC2240CUP-12#PBF supports three output configurations via the LVDS pin: LVDS mode (differential 12-bit outputs), full-rate CMOS (single 12-bit bus at 170 MHz), and demultiplexed CMOS (dual 6-bit buses at 85 MHz). The MODE pin further selects output format (offset binary or 2's complement) and enables clock duty cycle stabilization.

How does the SENSE pin configure the input range on the LTC2240CUP-12#PBF?

The SENSE pin on the LTC2240CUP-12#PBF directly programs the full-scale differential input range: connecting SENSE to VCM selects ±0.5 V, to VDD selects ±1 V, and to an external voltage between 0.5 V and 1.0 V selects ±V_SENSE. This eliminates external resistor networks and enables dynamic range adaptation in software-defined radio front ends.

What is the pipeline latency of the LTC2240CUP-12#PBF in different output modes?

The LTC2240CUP-12#PBF exhibits consistent 5-cycle pipeline latency in full-rate CMOS and demultiplexed interleaved CMOS modes. In demultiplexed simultaneous CMOS mode, latency is 5 or 6 cycles depending on bus alignment - a deterministic value critical for time-sensitive feedback loops in digital predistortion systems.

Can the LTC2240CUP-12#PBF operate with a single 2.5 V supply?

Yes, the LTC2240CUP-12#PBF operates from a single 2.5 V analog supply (VDD = 2.375 V to 2.625 V) and supports independent output supply (OVDD) ranging from 0.5 V to 2.625 V in CMOS mode or 2.375 V to 2.625 V in LVDS mode. This simplifies power architecture versus dual-supply ADCs requiring separate analog/digital rails.