Analog Devices Inc. LTC2182IUP#PBF

Overview

LTC2182IUP#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 65Msps dual-channel simultaneous-sampling analog-to-digital converter optimized for high-dynamic-range signal digitization in communications infrastructure. It delivers 77dB SNR, 90dB SFDR, and ultralow 0.07psRMS jitter, enabling undersampling of IF signals up to 140MHz in cellular base stations and software-defined radios.

For engineers reviewing the LTC2182IUP#PBF datasheet, LTC2182IUP#PBF pinout, LTC2182IUP#PBF application, or LTC2182IUP#PBF equivalent, key selection criteria include its dual-channel synchronization capability, selectable CMOS/DDR-CMOS/DDR-LVDS output interfaces, 1.8V single-supply operation, and –40°C to 85°C industrial temperature grade.

Technical Context

The LTC2182IUP#PBF implements two independent 16-bit ADC cores sharing a common sample-and-hold with 550MHz full-power bandwidth, ensuring precise channel-to-channel timing alignment. Its differential encode input accepts PECL, LVDS, TTL, or CMOS clock sources, and optional duty cycle stabilization maintains performance across wide input duty cycles.

Digital outputs support three configurable modes: full-rate CMOS (1.2–1.8V swing), DDR-CMOS, or DDR-LVDS with on-chip 100Ω termination. A serial SPI port enables real-time configuration of randomizer, nap/shutdown modes, and input range (1VP-P to 2VP-P), while internal reference provides 1.25V ±25ppm/°C stability.

Key Specifications

Pinout & Package

64-pin (9mm × 9mm) plastic QFN package with exposed thermal pad (Pin 65 = GND, must be soldered). Pinout optimized for analog isolation: dedicated VCM1/VCM2 bias outputs, separate REFH/REFL pairs, and split ground pins (GND at Pins 3, 6, 14) minimize crosstalk between channels.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9253BCPZ-65 and ADS52J90IRGCT, the LTC2182IUP#PBF offers superior SNR/SFDR at lower power and simpler parallel/LVDS interfacing-ideal for space-constrained, high-fidelity dual-channel systems where JESD204B complexity or quad-channel overhead is unnecessary.

Availability

LTC2182IUP#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, portable medical imaging, and multi-channel data acquisition requiring stable component supply across industrial temperature ranges.

Supply support for LTC2182IUP#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 aerospace, industrial, automotive, and communications markets.

The LTC2182IUP#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for demanding communications and instrumentation applications requiring simultaneous sampling, low jitter, and wide dynamic range.

FAQ

What is the operating temperature range of the LTC2182IUP#PBF?

The LTC2182IUP#PBF is rated for industrial operation from –40°C to +85°C, as indicated by the "I" suffix in the part number. This range is validated per the Absolute Maximum Ratings table and applies to all DC and AC specifications unless otherwise noted in the datasheet, making it suitable for outdoor base station equipment and ruggedized portable instruments.

Does the LTC2182IUP#PBF support differential analog input only?

No, the LTC2182IUP#PBF supports both differential and single-ended analog inputs. The AIN1+/AIN1– and AIN2+/AIN2– pairs are designed for differential drive, but the device also accepts single-ended signals referenced to VCM1/VCM2, with specified CMRR of 80dB. Input common-mode voltage must remain within 0.7V to 1.25V for proper operation.

How does the duty cycle stabilizer function in the LTC2182IUP#PBF?

The duty cycle stabilizer in the LTC2182IUP#PBF actively corrects asymmetric clock inputs to maintain optimal sampling aperture timing. When enabled (via CS pin in parallel mode), it ensures consistent tL and tH values even with 20%–80% input duty cycles, preserving 77dB SNR performance at full 65Msps rate without requiring external clock conditioning circuitry.

Can the LTC2182IUP#PBF operate with a 1.2V OVDD supply for CMOS outputs?

Yes, the LTC2182IUP#PBF supports OVDD from 1.1V to 1.9V, including 1.2V for CMOS output mode. At OVDD = 1.2V, VOH is guaranteed ≥1.185V and VOL ≤0.010V under 500µA load, enabling direct interfacing with 1.2V FPGA I/O banks while reducing switching power by ~30% versus 1.8V operation.

What is the purpose of the PAR/SER pin on the LTC2182IUP#PBF?

The PAR/SER pin on the LTC2182IUP#PBF selects between serial SPI programming (PAR/SER = GND) and parallel mode control (PAR/SER = VDD). In serial mode, CS/SCK/SDI/SDO form a 4-wire SPI interface for full register access. In parallel mode, those pins become discrete logic inputs controlling limited functions like output mode and duty cycle stabilizer, simplifying control in resource-constrained systems.