Analog Devices Inc. LTC2202IUK#PBF

Overview

LTC2202IUK#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 10Msps analog-to-digital converter optimized for high-frequency, wide dynamic range signal digitization up to 380MHz full-power bandwidth. It features a programmable gain amplifier (PGA) front end, 81.6dB SNR at 1MHz input (2.5V range), ±4LSB INL, and operates from a single 3.3V supply - ideal for spectrum analysis and cellular base station receivers.

For engineers reviewing the LTC2202IUK#PBF datasheet, LTC2202IUK#PBF pinout, LTC2202IUK#PBF application, or LTC2202IUK#PBF equivalent, key selection criteria include its 10Msps sampling rate, 100dB SFDR at low frequencies, PGA-selectable input range (1.667VP-P or 2.5VP-P), CMOS output swing adjustable from 0.5V to 3.6V, and industrial temperature range (–40°C to +85°C).

Technical Context

The LTC2202IUK#PBF employs a pipelined ADC architecture with integrated sample-and-hold and internal reference generator. Its PGA front end supports two differential input ranges (1.667VP-P or 2.5VP-P), and the analog input common mode is fixed at 1.25V via the VCM pin.

It includes optional internal dither and data output randomizer to improve SFDR performance, especially at low input levels. A clock duty cycle stabilizer enables robust operation across wide input clock duty cycles without external circuitry.

Key Specifications

Pinout & Package

48-lead (7mm × 7mm) plastic QFN package with exposed thermal pad (Pin 49 = GND). Requires soldering of exposed pad to PCB for thermal and electrical integrity. θ_JA = 29°C/W, T_JMAX = 150°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9240ASTZ-10 and LTC2201IUK#PBF, the LTC2202IUK#PBF delivers superior 16-bit linearity and 100dB SFDR at 10Msps while retaining pin compatibility with the LTC2201 - enabling scalable design reuse across performance tiers without PCB redesign.

Availability

LTC2202IUK#PBF is available at Aetrix Electronics and suitable for cellular infrastructure, spectrum analysis, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2202IUK#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.

The LTC220x family was designed specifically for high-speed, high-dynamic-range digitization in RF, communications, and instrumentation - emphasizing low jitter, flexible input scaling, and robust noise performance in compact QFN packages.

FAQ

What is the operating temperature range for the LTC2202IUK#PBF?

The LTC2202IUK#PBF is rated for industrial temperature operation from –40°C to +85°C, as indicated by the "I" grade suffix in the part number. This range is validated per the Absolute Maximum Ratings table and supported by full characterization of SNR, SFDR, and INL across the span - making it suitable for base station outdoor units and factory-floor test equipment.

Does the LTC2202IUK#PBF require an external reference, or does it have an internal one?

The LTC2202IUK#PBF includes an internal 2.5V bandgap reference. The SENSE pin selects reference mode: tying SENSE to VDD enables the internal reference, while applying 1.25V or 2.5V externally allows use of a higher-precision source. In either case, the full-scale ADC range remains 2.5V when PGA = 0 - ensuring consistent scaling regardless of reference choice.

How does the PGA setting affect the input range and performance of the LTC2202IUK#PBF?

The PGA pin on the LTC2202IUK#PBF selects between two differential input ranges: PGA = high yields 1.667VP-P full scale, and PGA = low yields 2.5VP-P. Both configurations maintain the same 81.6dB SNR and 100dB SFDR at low frequencies, but the lower range improves small-signal resolution when digitizing low-amplitude IF signals without external amplification.

Can the LTC2202IUK#PBF interface directly with 1.8V FPGA I/O banks?

Yes - the LTC2202IUK#PBF supports independent OVDD supply from 0.5V to 3.6V. Setting OVDD = 1.8V configures all 16 CMOS outputs (D0–D15) and control signals (OE, OF) to 1.8V logic levels, enabling direct connection to Xilinx or Intel FPGA banks without level translators - verified by VOL ≤ 0.1V and VOH ≥ 1.79V at IO = ±200μA.

What is the purpose of the CLKOUT+ and CLKOUT– pins on the LTC2202IUK#PBF?

The CLKOUT+ and CLKOUT– pins on the LTC2202IUK#PBF provide a complementary, low-skew (±0.6ns) copy of the internal sampling clock, delayed by 1.3–4.9ns relative to CLK. This buffered clock output synchronizes downstream FPGA logic or DACs, eliminating skew-induced timing errors in closed-loop systems - particularly valuable in digital predistortion and feedback receiver architectures.