Analog Devices Inc. LTC2245CUH#TRPBF

Overview

LTC2245CUH#TRPBF from Analog Devices (acquired Linear Technology) is a 14-bit, 10 Msps low-power pipelined analog-to-digital converter operating from a single 3V supply (2.7V–3.4V), delivering 74.4 dB SNR and 90 dB SFDR at 5 MHz input - optimized for high-fidelity spectral analysis, portable instrumentation, and broadband communications signal digitization.

For engineers reviewing the LTC2245CUH#TRPBF datasheet, LTC2245CUH#TRPBF pinout, LTC2245CUH#TRPBF application, or LTC2245CUH#TRPBF equivalent, key selection criteria include its 575 MHz full-power bandwidth, clock duty cycle stabilizer support, flexible ±0.5V to ±1V differential input range, and 32-pin 5 mm × 5 mm QFN package with exposed thermal pad.

Technical Context

The LTC2245CUH#TRPBF implements a six-stage CMOS pipelined ADC architecture with 5-cycle pipeline latency, enabling deterministic timing for real-time signal processing. It integrates a sample-and-hold with 575 MHz full-power bandwidth, internal 1.5 V bandgap reference, and programmable input range via SENSE pin voltage selection (±0.5 V to ±1 V).

Its digital interface supports offset binary or 2's complement output formats selected by MODE pin voltage, while CLK accepts single-ended CMOS/TTL inputs and optionally enables internal duty cycle stabilization via PLL-based edge regeneration - critical for maintaining AC performance with non-50% duty cycle clocks.

Key Specifications

Pinout & Package

32-pin (5 mm × 5 mm) plastic QFN package with exposed thermal pad (Pin 33 = GND), requiring soldering to PCB ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS5272IPFP and AD9245BSTZ-10, the LTC2245CUH#TRPBF uniquely combines single-supply operation, integrated clock duty cycle stabilization, and best-in-class 90 dB SFDR - making it optimal for portable, battery-constrained, and spectrally demanding applications where clock purity cannot be guaranteed.

Availability

LTC2245CUH#TRPBF is available at Aetrix Electronics and suitable for wireless communication receivers, portable spectrum analyzers, and medical ultrasound beamforming systems requiring stable component supply with consistent parametric performance across production lots.

Supply support for LTC2245CUH#TRPBF 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 precision instrumentation, communications, and industrial markets since 1965.

The LTC2245CUH#TRPBF belongs to Linear Technology's high-speed precision ADC product line, designed specifically for applications demanding low power, high SNR/SFDR, and robust clock interface flexibility in space- and energy-constrained systems.

FAQ

What is the operating temperature range for the LTC2245CUH#TRPBF?

The LTC2245CUH#TRPBF is specified for commercial operation from 0°C to +70°C (C-grade). Its absolute maximum junction temperature is 125°C, and thermal resistance θ_JA is 34°C/W. The exposed pad (Pin 33) must be soldered to PCB ground to ensure proper thermal dissipation and electrical stability during continuous 10 Msps operation.

Does the LTC2245CUH#TRPBF support external reference inputs?

The LTC2245CUH#TRPBF does not accept external reference voltages directly on REFH/REFL pins. Instead, it uses an internal 1.5 V bandgap reference and allows input range scaling via the SENSE pin: applying an external voltage between 0.5 V and 1 V to SENSE sets the differential input range to ±V_SENSE, enabling custom full-scale ranges without external reference ICs.

How does the clock duty cycle stabilizer function in the LTC2245CUH#TRPBF?

The LTC2245CUH#TRPBF's clock duty cycle stabilizer uses a PLL to regenerate an internal 50% duty cycle clock from the rising edge of the external CLK input. When enabled (via MODE = 1/3 VDD or 2/3 VDD), it ignores the falling edge of the input clock and synthesizes a clean internal edge - allowing full AC performance even with input duty cycles from 5% to 95%, provided minimum high/low times exceed 5 ns.

What is the purpose of the OF (Over/Under Flow) pin on the LTC2245CUH#TRPBF?

The OF pin on the LTC2245CUH#TRPBF asserts high when the analog input exceeds the selected full-scale range - indicating either overrange (input > +FS) or underrange (input < –FS). This flag is asynchronous and latched per conversion cycle, enabling real-time signal clipping detection in firmware or FPGA logic without parsing full 14-bit output words.

Can the LTC2245CUH#TRPBF operate with OVDD below 1.8 V?

Yes - the LTC2245CUH#TRPBF supports OVDD from 0.5 V to 3.6 V. At OVDD = 1.8 V, output VOH is guaranteed ≥1.79 V and VOL ≤0.09 V under 1.6 mA load, enabling direct interfacing with 1.8 V logic families. Lower OVDD reduces digital switching noise coupling into analog sections, improving SFDR by up to 3 dB in noise-sensitive layouts.