Analog Devices Inc. DC1369A-M

Overview

LTC2262-14 from Analog Devices (acquired Linear Technology) is a 14-bit, 150Msps ultralow-power analog-to-digital converter optimized for high-frequency signal digitization in communications infrastructure. It delivers 72.8dB SNR, 88dB SFDR, and 0.17psRMS jitter with single 1.8V supply operation, enabling undersampling of IF signals up to 800MHz full-power bandwidth - deployed in cellular base stations and software-defined radios.

For engineers reviewing the LTC2262-14 datasheet, LTC2262-14 pinout, LTC2262-14 application, or LTC2262-14 equivalent, key selection criteria include its DDR LVDS/CMOS output flexibility, ±1LSB INL accuracy over temperature, SPI-configurable clock duty cycle stabilizer, and 40-pin QFN package thermal performance (θJA = 32°C/W).

Technical Context

The LTC2262-14 employs a pipelined ADC architecture with on-chip correction logic and a low-jitter sample-and-hold front-end. Its 800MHz full-power bandwidth supports direct RF sampling of IF signals up to 140MHz while maintaining 72.5dB SNR at that frequency.

Digital interface options include full-rate CMOS, double-data-rate CMOS, and double-data-rate LVDS outputs - each configurable via SPI-controlled mode registers. The ENC+/ENC– differential encode inputs accept PECL, LVDS, TTL, or CMOS clocks, and an optional duty cycle stabilizer ensures timing integrity across wide input duty cycle ranges.

Key Specifications

Pinout & Package

The LTC2262-14 is housed in a 40-lead (6mm × 6mm) plastic QFN package (UJ) with exposed thermal pad (Pin 41) soldered to PCB ground for optimal thermal dissipation (θJA = 32°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9246BCPZ-150 and ADS5463IPFP, the LTC2262-14 uniquely balances 14-bit resolution, 150Msps rate, ultralow 149mW power, and triple-output-mode flexibility - making it optimal for thermally constrained, multi-standard RF platforms requiring hardware-adaptable interfaces.

Availability

LTC2262-14 is available at Aetrix Electronics and suitable for cellular infrastructure, software-defined radio development, and portable medical imaging systems requiring stable component supply and long-term production continuity.

Supply support for LTC2262-14 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 LTC2262-14 belongs to ADI's high-speed precision ADC product line, designed specifically for demanding communications and instrumentation applications where low power, high dynamic range, and flexible digital interfacing are essential.

FAQ

What is the absolute maximum analog input voltage rating for the LTC2262-14?

The LTC2262-14 specifies an absolute maximum analog input voltage (AIN+, AIN–, PAR/SER, SENSE) of –0.3V to (VDD + 0.2V), with VDD rated up to 2V. Exceeding this range risks permanent damage due to internal diode clamping, though the device tolerates >100mA transient current below GND or above VDD without latchup.

Does the LTC2262-14 support both internal and external voltage references?

Yes, the LTC2262-14 supports both reference modes. Connecting SENSE to VDD selects the internal 1.25V reference with ±1V input range; grounding SENSE selects ±0.5V range; applying 0.625V–1.3V to SENSE configures an external reference with ±0.8×VSENSE input range - all verified in the datasheet's Analog Input section.

How does the LTC2262-14 achieve 0.17psRMS jitter performance?

The LTC2262-14 achieves 0.17psRMS aperture jitter through a low-noise, high-bandwidth sample-and-hold circuit with optimized clock distribution and on-chip clock duty cycle stabilization. This jitter value is measured under specified conditions (VDD = OVDD = 1.8V, fSAMPLE = 150MHz, differential ENC+/ENC– = 2VP-P sine wave) and directly enables clean undersampling of IF signals.

Can the LTC2262-14 operate with a single-ended encode clock?

Yes, the LTC2262-14 supports single-ended encode operation by tying ENC– to GND. In this mode, ENC+ accepts TTL, CMOS, or 1.8V square-wave inputs with VIH ≥ 1.2V and VIL ≤ 0.6V. Single-ended drive reduces system power consumption compared to differential encoding but may slightly increase sensitivity to common-mode noise.

What are the thermal design considerations for the LTC2262-14 in continuous operation?

The LTC2262-14 uses a 40-lead QFN package with an exposed thermal pad (Pin 41) that must be soldered to PCB ground. Its θJA is 32°C/W; at 149mW typical power dissipation, junction temperature rise is ~4.8°C above ambient. For reliable continuous operation, ensure ≥200mm² copper pour under the pad with ≥4 thermal vias to inner ground planes.