Analog Devices Inc. LTC2226CUH#TRPBF

Overview

LTC2226CUH#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 25Msps low-power 3V analog-to-digital converter optimized for high-dynamic-range signal digitization in imaging and communications systems. It delivers 71.4dB SNR and 90dB SFDR at 5MHz input, ±0.3LSB INL (typ), 575MHz full-power bandwidth, and operates from a single 2.7V–3.4V supply consuming only 75mW.

For engineers reviewing the LTC2226CUH#TRPBF datasheet, LTC2226CUH#TRPBF pinout, LTC2226CUH#TRPBF application, or LTC2226CUH#TRPBF equivalent, key selection criteria include its 25Msps sample rate, differential analog input interface, flexible 1VP-P to 2VP-P input range, clock duty cycle stabilizer support, and QFN-32 package compatibility with space-constrained medical ultrasound and portable instrumentation designs.

Technical Context

The LTC2226CUH#TRPBF implements a six-stage CMOS pipelined ADC architecture with digital correction logic, achieving 5-cycle pipeline latency and aperture jitter of 0.2psRMS. Its sample-and-hold front-end supports both differential and single-ended drive, with programmable input common-mode voltage via VCM (1.5V ±25ppm/°C) and reference configuration via SENSE pin.

It features dual-reference capability (internal 1.5V or external), output drivers with independent OVDD (0.5V–3.6V) for logic-level flexibility, and three power modes: active (75mW), nap (15mW), and shutdown (2mW). The MODE pin selects offset binary or 2's complement output format and enables/disables the clock duty cycle stabilizer.

Key Specifications

Pinout & Package

32-lead (5mm × 5mm) plastic QFN package with exposed pad (Pin 33) soldered to PCB ground for thermal and electrical integrity. Pin pitch: 0.5mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS5272IPFP and MAX1127AETX+, the LTC2226CUH#TRPBF offers the optimal balance of 25Msps throughput, 90dB SFDR, and 75mW dissipation in a compact 5mm × 5mm QFN - making it uniquely suitable for thermally constrained, high-fidelity digitization in portable medical and test equipment.

Availability

LTC2226CUH#TRPBF is available at Aetrix Electronics and suitable for ultrasound imaging systems, portable spectrum analyzers, wireless broadband modems, and industrial process monitoring requiring stable component supply and long-term production continuity.

Supply support for LTC2226CUH#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets.

The LTC2226CUH#TRPBF belongs to the LTC222x family of low-power, high-SFDR pipeline ADCs designed specifically for demanding digitization in portable medical, test & measurement, and broadband communications equipment.

FAQ

What is the maximum input frequency supported by the LTC2226CUH#TRPBF while maintaining specified SNR?

The LTC2226CUH#TRPBF maintains 71.4dB SNR up to 5MHz input frequency and sustains 71.3dB SNR at 30MHz input under –1dBFS conditions. Its 575MHz full-power bandwidth ensures minimal amplitude roll-off, but SNR degrades gradually above 30MHz due to aperture jitter and front-end noise - actual usable bandwidth depends on system-level anti-alias filtering and clock quality.

How does the SENSE pin configure input range on the LTC2226CUH#TRPBF?

The SENSE pin on the LTC2226CUH#TRPBF selects full-scale input range: tied to VCM (1.5V) yields ±0.5V differential range; tied to VDD yields ±1V; an external 0.5–1V reference applied to SENSE scales the range linearly to ±VSENSE. This eliminates external gain resistors and supports adaptive range switching in multi-signal acquisition systems.

Can the LTC2226CUH#TRPBF operate with a 1.8V OVDD supply?

Yes, the LTC2226CUH#TRPBF supports OVDD from 0.5V to 3.6V. At OVDD = 1.8V, VOH is guaranteed ≥1.79V and VOL ≤0.09V with 1.6mA sink current, enabling direct interfacing to 1.8V FPGA I/O banks without level translation - verified in the DIGITAL INPUTS AND DIGITAL OUTPUTS section of the datasheet.

What is the pipeline latency of the LTC2226CUH#TRPBF and how does it affect system timing?

The LTC2226CUH#TRPBF has a fixed 5-cycle pipeline latency from CLK edge to valid D0–D11 output. For a 25Msps clock, this equals 200ns delay - critical for real-time control loops or time-of-flight calculations. The timing diagram (Figure TD01) confirms deterministic latency independent of input signal, enabling precise synchronization with downstream DSP or FPGA logic.

Does the LTC2226CUH#TRPBF require external reference components?

No - the LTC2226CUH#TRPBF integrates a precision 1.5V reference with ±25ppm/°C tempco and supports internal reference operation. External REFH/REFL pins must be shorted and bypassed with 0.1μF + 2.2μF ceramics, but no external reference IC is needed unless higher accuracy or custom range is required. The internal reference drives VCM and sets full-scale compliance.