Analog Devices Inc. LTC2246CUH#TRPBF

Overview

LTC2246CUH#TRPBF from Analog Devices (formerly Linear Technology) is a 14-bit, 25Msps low-power analog-to-digital converter optimized for high-dynamic-range signal digitization in imaging and communications systems. It operates from a single 3V supply (2.7V–3.4V), delivers 74.5dB SNR and 90dB SFDR at 5MHz input, supports ±0.5V to ±1V differential input range, and features integrated clock duty cycle stabilizer and shutdown/nap modes.

For engineers reviewing the LTC2246CUH#TRPBF datasheet, LTC2246CUH#TRPBF pinout, LTC2246CUH#TRPBF application, or LTC2246CUH#TRPBF equivalent, key selection criteria include its 25Msps sampling rate, 75mW typical power consumption, 575MHz full-power bandwidth, flexible reference configuration via SENSE pin, and compatibility with 3.3V/2.5V/1.8V digital output logic levels.

Technical Context

The LTC2246CUH#TRPBF employs a six-stage CMOS pipelined ADC architecture with internal correction logic, achieving 5-cycle pipeline latency and no missing codes over temperature. Its sample-and-hold front-end provides 575MHz full-power bandwidth and <0.2psRMS aperture jitter, enabling accurate digitization of wideband RF and IF signals up to 140MHz.

It integrates a programmable 1.5V VCM bias output, dual-reference inputs (REFH/REFL), and configurable output format (offset binary or 2's complement) controlled by the MODE pin. The SENSE pin selects input range (±0.5V, ±1V, or ±V_SENSE) and reference source (internal or external), while SHDN/OE pins enable three power states: normal (75mW), nap (15mW), and shutdown (2mW).

Key Specifications

Pinout & Package

Package: 32-lead (5mm × 5mm) plastic QFN with exposed pad (GND). Requires soldering of exposed pad to PCB ground plane for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8588SIPM and AD9245BSTZ-25, the LTC2246CUH#TRPBF uniquely combines 25Msps throughput, integrated VCM and clock stabilizer, and 75mW power in a compact QFN - making it optimal for space-constrained, wideband, battery-aware systems where feature integration reduces design risk.

Availability

LTC2246CUH#TRPBF is available at Aetrix Electronics and suitable for ultrasound imaging, portable spectrum analyzers, industrial NDT systems, and medical ECG signal conditioning requiring stable component supply and long-term production continuity.

Supply support for LTC2246CUH#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 industrial, automotive, communications, and healthcare markets.

The LTC2246CUH#TRPBF belongs to ADI's high-speed precision ADC product line, designed specifically for demanding wide-dynamic-range digitization in portable and embedded instrumentation where low power, small size, and integrated functionality are critical.

FAQ

What is the maximum input frequency supported by the LTC2246CUH#TRPBF before signal attenuation exceeds 3dB?

The LTC2246CUH#TRPBF has a 575MHz full-power bandwidth, meaning it maintains ≤3dB amplitude loss for input frequencies up to 575MHz when driven with a full-scale signal. This enables direct sampling of IF signals up to 140MHz while preserving spectral integrity for applications like ultrasound and spectrum analysis.

How does the SENSE pin configure the input range on the LTC2246CUH#TRPBF?

The SENSE pin on the LTC2246CUH#TRPBF selects both input range and reference source: connecting SENSE to VCM sets ±0.5V differential range with internal reference; connecting to VDD sets ±1V range; applying an external 0.5–1V voltage sets ±V_SENSE. This eliminates need for external gain resistors or reference buffers in most signal chain designs.

Can the LTC2246CUH#TRPBF operate with a 1.8V digital output supply (OVDD)?

Yes, the LTC2246CUH#TRPBF supports OVDD from 0.5V to 3.6V. At OVDD = 1.8V, it delivers VOH ≥ 1.79V and VOL ≤ 0.09V under 1.6mA load, ensuring reliable interfacing with 1.8V FPGA I/O banks without level shifters - verified in the device's Logic Outputs specification table.

What is the pipeline latency of the LTC2246CUH#TRPBF, and how does it affect system synchronization?

The LTC2246CUH#TRPBF has a fixed 5-cycle pipeline latency from CLK edge to valid D0–D13 output. This deterministic delay enables precise timing alignment in synchronous systems such as phased-array ultrasound or digital downconverters, where consistent sample-to-data latency is required for coherent signal processing.

Does the LTC2246CUH#TRPBF require external decoupling capacitors, and if so, what values are specified?

Yes, the LTC2246CUH#TRPBF requires per-pin decoupling: REFH/REFL need 0.1µF + 2.2µF ceramics to GND; VDD pins require 0.1µF ceramics; OVDD needs 0.1µF; and VCM requires ≥2.2µF. These values are specified in the Pin Functions section and are mandatory to achieve rated SNR/SFDR performance and stability.