Analog Devices Inc. LTC2209IUP#PBF

Overview

LTC2209IUP#PBF from Analog Devices (acquired Linear Technology) is a 16-bit, 160Msps analog-to-digital converter optimized for high-frequency signal digitization up to 700MHz full-power bandwidth. It features a programmable gain amplifier (PGA) front end supporting 1.5V_P-P or 2.25V_P-P input ranges, ultra-low 70fs_RMS aperture jitter, and ±5.5LSB INL. It serves in wide-dynamic-range RF receivers and spectrum analyzers requiring high SFDR and low noise floor.

For engineers reviewing the LTC2209IUP#PBF datasheet, LTC2209IUP#PBF pinout, LTC2209IUP#PBF application, or LTC2209IUP#PBF equivalent, key selection criteria include its 100dB spurious-free dynamic range at 5MHz, LVDS/CMOS output flexibility, –40°C to +85°C industrial temperature rating, and 64-pin QFN package with exposed thermal pad.

Technical Context

The LTC2209IUP#PBF implements a 16-bit pipelined ADC core with integrated sample-and-hold, internal 2.5V bandgap reference (selectable via SENSE pin), and configurable clock duty cycle stabilizer. Its PGA front end enables input range optimization without external amplification, while the dual-bus CMOS output mode supports demultiplexed data at half-rate for reduced timing constraints.

Digital outputs are configurable as standard or low-power LVDS (with 100Ω differential termination) or single-ended CMOS (0.5V–3.6V OVDD programmable swing). Clock inputs accept differential (LVDS/PECL) or single-ended (TTL/CMOS) signals, and ENC+/- timing defines sampling edges with 1ns aperture delay and sub-ns skew control.

Key Specifications

Pinout & Package

64-pin (9mm × 9mm) plastic QFN package with exposed thermal pad (Pin 65 = GND), rated for –40°C to +85°C operation. Requires 1µF ceramic bypass on each VDD pin and 2.2µF on VCM.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9653BCPZ-125 and LTC2217IUP#PBF, the LTC2209IUP#PBF uniquely delivers 160Msps sampling at 16-bit resolution with 700MHz analog bandwidth - essential for first-Nyquist sampling of L/S-band signals without external mixing, while maintaining compatibility with legacy LTC220x board designs.

Availability

LTC2209IUP#PBF is available at Aetrix Electronics and suitable for cellular base station receivers, spectrum analyzers, and automated test equipment requiring stable component supply across extended industrial temperature ranges.

Supply support for LTC2209IUP#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 communications, industrial, automotive, and healthcare markets.

The LTC2209IUP#PBF belongs to ADI's high-speed precision ADC product line, engineered for demanding RF and instrumentation applications requiring wide bandwidth, low distortion, and robust thermal performance across industrial temperatures.

FAQ

What is the operating temperature range for the LTC2209IUP#PBF?

The LTC2209IUP#PBF is specified for operation from –40°C to +85°C, making it suitable for industrial and outdoor telecommunications equipment. This extended temperature grade is confirmed by the "I" suffix in the part number and validated in the Absolute Maximum Ratings table of the official datasheet.

Does the LTC2209IUP#PBF support both LVDS and CMOS digital outputs?

Yes, the LTC2209IUP#PBF supports selectable output formats via the LVDS pin (Pin 61): standard LVDS, low-power LVDS, full-rate CMOS, or demultiplexed CMOS. The output supply OVDD is independently configurable from 0.5V to 3.6V in CMOS mode, enabling interfacing with diverse FPGA I/O banks.

How does the PGA function affect input range on the LTC2209IUP#PBF?

The PGA pin (Pin 64) configures the front-end gain: low = 1× gain (2.25V_P-P full-scale input range), high = 1.5× gain (1.5V_P-P full-scale range). This allows optimization for either maximum dynamic range (low PGA) or improved SNR on smaller signals (high PGA), without changing external circuitry.

What is the purpose of the SENSE pin on the LTC2209IUP#PBF?

The SENSE pin (Pin 1) selects the reference source: tied to VDD enables the internal 2.5V bandgap reference; an external 1.25V or 2.5V reference may also be applied. Both configurations yield a 2.25V_P-P full-scale ADC range when PGA = 0, ensuring consistent scaling across reference options.

Can the LTC2209IUP#PBF be used with single-ended clock inputs?

Yes, the ENC+ and ENC– inputs accept single-ended clocks (TTL, CMOS, or sine wave) when driven with appropriate AC coupling and biasing. The internal 1.6V common-mode bias on both pins allows direct connection of single-ended signals referenced to that level, with the duty cycle stabilizer improving timing margin at full speed.