Analog Devices Inc. LTC2245CUH#PBF

Overview

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

For engineers reviewing the LTC2245CUH#PBF datasheet, LTC2245CUH#PBF pinout, LTC2245CUH#PBF application, or LTC2245CUH#PBF equivalent, this page provides verified AC/DC specifications, QFN-32 package layout, clock duty cycle stabilizer behavior, flexible reference programming via SENSE/MODE pins, and validated alternatives for 10Msps 14-bit ADC migration.

Technical Context

The LTC2245CUH#PBF implements a six-stage CMOS pipelined ADC architecture with 5-cycle pipeline latency, enabling deterministic timing for real-time control loops. It integrates a 575MHz full-power bandwidth sample-and-hold, internal 1.5V bandgap reference, and programmable ±0.5V to ±1V differential input range controlled by the SENSE pin.

Its clock interface accepts single-ended CMOS/TTL inputs with optional duty cycle stabilization (enabled via MODE pin at 1/3VDD or 2/3VDD), supporting non-50% duty cycles while maintaining aperture jitter of 0.2psRMS. Digital outputs are parallel LVCMOS-compatible, with separate OVDD (0.5V–3.6V) and OGND rails for logic-level flexibility.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 14-bit, 10Msps ADC applications.

Compared with ADS8326IPW and LTC2246IUH, the LTC2245CUH#PBF uniquely balances 10Msps throughput, 74.4dB SNR, and 60mW power in a compact QFN - making it optimal for portable, battery-constrained, wideband digitization where neither SAR speed nor higher-speed pipelined power budgets are acceptable.

Availability

LTC2245CUH#PBF is available at Aetrix Electronics and suitable for wireless communication receivers, portable spectrum analyzers, medical ultrasound beamformers, and industrial vibration monitoring systems requiring stable component supply and long-term production continuity.

Supply support for LTC2245CUH#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) designs high-performance signal processing components for precision measurement, communications, and industrial systems.

The LTC2245CUH#PBF belongs to Linear's ultra-low-power, high-SFDR pipelined ADC product line - engineered specifically for portable instrumentation, spectral analysis, and IF digitization where thermal and power constraints preclude traditional high-speed ADC solutions.

FAQ

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

The LTC2245CUH#PBF is rated for 0°C to 70°C ambient operation (Commercial grade). Its DC specs - including ±1LSB INL and ±0.5LSB DNL - are guaranteed over this full range. For industrial applications requiring –40°C to 85°C, the pin-compatible LTC2245IUH variant is available.

Does the LTC2245CUH#PBF require an external reference voltage?

No. The LTC2245CUH#PBF integrates a 1.5V bandgap reference and difference amplifier. It supports fully self-contained operation using the internal reference, with input range selection (±0.5V or ±1V) controlled by the SENSE pin. External references are optional and applied via the SENSE pin only.

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

The LTC2245CUH#PBF's clock duty cycle stabilizer uses a PLL to generate an internal 50% duty cycle clock from an asymmetric input. When MODE is set to 1/3VDD or 2/3VDD, the circuit locks to the CLK rising edge and ignores the falling edge - enabling robust operation with microcontroller-generated clocks or jittery PLL outputs without SNR degradation.

What is the purpose of the OF (overflow) pin on the LTC2245CUH#PBF?

The OF pin on the LTC2245CUH#PBF is an active-high flag that pulses when the analog input exceeds the selected full-scale range (±0.5V or ±1V). It provides real-time overrange detection for automatic gain control (AGC) loops in receivers or protection logic in test equipment - eliminating need for software-based range checking.

Can the LTC2245CUH#PBF drive standard FPGA I/O banks directly?

Yes. The LTC2245CUH#PBF features a dedicated OVDD supply (0.5V–3.6V) for its D0–D13 parallel outputs, allowing direct interface with FPGA banks operating at 1.2V, 1.8V, 2.5V, or 3.3V. Output drive strength (±50mA) and voltage compliance meet LVCMOS specifications across this range without external level shifters.