Analog Devices Inc. LTC2253IUH#PBF

Overview

LTC2253IUH#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 125Msps low-power pipelined analog-to-digital converter operating from a single 3V supply. It delivers 70.2dB SNR and 88dB SFDR at 5MHz input, features 640MHz full-power bandwidth, clock duty cycle stabilizer, and shutdown/nap modes. It is used in high-speed digitization for ultrasound imaging and broadband communications.

For engineers reviewing the LTC2253IUH#PBF datasheet, LTC2253IUH#PBF pinout, LTC2253IUH#PBF application, or LTC2253IUH#PBF equivalent, key selection criteria include guaranteed no missing codes over temperature, ±0.3LSB INL (typ), flexible 1V_P–P to 2V_P–P differential input range, and QFN-32 package with exposed thermal pad.

Technical Context

The LTC2253IUH#PBF implements a six-stage CMOS pipelined ADC architecture with digital correction logic and integrated sample-and-hold. Its internal 1.5V VCM reference and SENSE-pin programmable input range (±0.5V to ±1V) enable precise common-mode biasing for differential signal acquisition.

It supports offset binary or 2's complement output formats via MODE pin voltage selection, and includes dedicated OF (overflow/underflow) flag output and separate OVDD supply (0.5V–3.6V) for interfacing with diverse logic families while maintaining analog performance integrity.

Key Specifications

Pinout & Package

Package: 32-lead (5mm × 5mm) plastic QFN with exposed thermal pad (Pin 33 = GND, must be soldered to PCB).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9226ASTZ and LTC2263IUP#PBF, the LTC2253IUH#PBF provides optimal balance of 125Msps speed, 70.2dB SNR, and 395mW power in a compact 32-pin QFN-making it ideal for space-constrained, thermally sensitive, high-bandwidth applications where 12-bit resolution suffices.

Availability

LTC2253IUH#PBF is available at Aetrix Electronics and suitable for ultrasound imaging systems, wireless infrastructure equipment, and portable test instrumentation requiring stable component supply and guaranteed industrial temperature range (–40°C to +85°C).

Supply support for LTC2253IUH#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2253IUH#PBF belongs to ADI's high-speed precision ADC product line, designed specifically for demanding digitization tasks in medical imaging, communications infrastructure, and instrumentation where AC performance, low power, and robust operation across temperature are critical.

FAQ

What is the operating temperature range for the LTC2253IUH#PBF?

The LTC2253IUH#PBF is rated for industrial operation from –40°C to +85°C. This is confirmed by the "I" grade designation in the part number and specified in the Absolute Maximum Ratings table. All key DC and AC parameters-including INL, DNL, SNR, and SFDR-are guaranteed over this full range, making LTC2253IUH#PBF suitable for harsh-environment deployments such as outdoor base stations and portable medical devices.

Does the LTC2253IUH#PBF require an external reference voltage?

No, the LTC2253IUH#PBF includes an internal 1.5V bandgap reference and supports fully self-contained operation. The SENSE pin allows selection between ±0.5V and ±1V input ranges using only the internal reference. External references may be used for enhanced accuracy, but are not required for standard operation of LTC2253IUH#PBF.

How does the MODE pin affect the output format and clock functionality of the LTC2253IUH#PBF?

The MODE pin on the LTC2253IUH#PBF configures both output data format and clock duty cycle stabilizer state. Ground selects offset binary with stabilizer off; 1/3 VDD selects offset binary with stabilizer on; 2/3 VDD selects 2's complement with stabilizer on; VDD selects 2's complement with stabilizer off. This dual-function control eliminates need for additional configuration pins on LTC2253IUH#PBF.

What is the purpose of the OF (overflow/underflow) pin on the LTC2253IUH#PBF?

The OF pin on the LTC2253IUH#PBF is an asynchronous active-high flag indicating when the analog input exceeds the selected full-scale range-either positively (overflow) or negatively (underflow). It operates independently of the data output timing and provides immediate feedback for AGC or clipping detection circuits without requiring post-processing of the D0–D11 bus.

Can the LTC2253IUH#PBF interface directly with a 1.8V FPGA I/O bank?

Yes, the LTC2253IUH#PBF supports direct interface with 1.8V FPGA I/O banks via its independent OVDD supply pin. When OVDD is set to 1.8V, the D0–D11 outputs meet LVCMOS 1.8V logic thresholds (VOH ≥ 1.79V, VOL ≤ 0.09V at 1.6mA), eliminating level-shifter components and simplifying board design for mixed-voltage systems using LTC2253IUH#PBF.