Analog Devices Inc. LTC2287CUP#TRPBF

Overview

LTC2287CUP#TRPBF from Analog Devices (formerly Linear Technology) is a dual 10-bit, 40Msps low-noise analog-to-digital converter operating from a single 3V supply. It delivers 61.8dB SNR and 85dB SFDR at Nyquist, with 110dB channel isolation at 100MHz and 575MHz full-power bandwidth. Designed for high-fidelity signal digitization in communications and imaging systems.

For engineers reviewing the LTC2287CUP#TRPBF datasheet, LTC2287CUP#TRPBF pinout, LTC2287CUP#TRPBF application, or LTC2287CUP#TRPBF equivalent, key selection criteria include dual-channel sampling rate, SNR/SFDR trade-offs across input frequency, flexible 1VP-P to 2VP-P input range, clock duty cycle stabilization, and multiplexed vs. separate digital output bus configuration.

Technical Context

The LTC2287CUP#TRPBF implements a six-stage CMOS pipelined ADC architecture per channel, achieving 5-cycle pipeline latency and supporting independent or synchronized sampling via CLKA/CLKB inputs. Its internal 1.5V reference buffer (VCMA/VCMB), programmable SENSEA/SENSEB pins, and MODE-selectable offset binary/2's complement output format enable precise input range and data format control.

It integrates a clock duty cycle stabilizer that maintains performance across wide input clock duty cycles, and supports three power states: active (235mW), nap mode (15mW per channel), and shutdown (2mW per channel). The dual-channel design ensures >110dB crosstalk suppression up to 100MHz while maintaining matched gain (±0.3%FS) and offset (±2mV).

Key Specifications

Pinout & Package

Package: 64-lead (9mm × 9mm) plastic QFN with exposed GND pad (Pin 65) requiring soldering to PCB for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel ADC applications.

Compared with AD9233BCPZ-40 and LTC2289CUH#PBF, the LTC2287CUP#TRPBF offers superior SNR/SFDR at 40Msps with integrated clock stabilization and granular power control-making it optimal for noise-critical, thermally constrained dual-channel digitization where 10-bit resolution suffices.

Availability

LTC2287CUP#TRPBF is available at Aetrix Electronics and suitable for wireless infrastructure, medical imaging, spectral analysis, and portable instrumentation requiring stable component supply across extended production lifecycles.

Supply support for LTC2287CUP#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. is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC2287 belongs to Analog Devices' high-speed precision ADC product line, engineered for demanding digitization tasks where dynamic range, channel matching, and low power coexist in compact form factors.

FAQ

What is the maximum analog input frequency supported by the LTC2287CUP#TRPBF?

The LTC2287CUP#TRPBF features a 575MHz full-power bandwidth, meaning it can accurately digitize analog signals up to this frequency before amplitude roll-off exceeds 3dB. This enables direct sampling of L-band RF signals (e.g., GPS L1 at 1.575GHz aliased into baseband) when used with appropriate anti-alias filtering and clock jitter management. Performance metrics like SNR and SFDR are specified up to 140MHz input frequency.

Does the LTC2287CUP#TRPBF support both differential and single-ended analog inputs?

Yes, the LTC2287CUP#TRPBF supports both configurations. Differential input (via AINA+/AINA– and AINB+/AINB–) is recommended for optimal AC performance, delivering 61.8dB SNR and 85dB SFDR. Single-ended drive is possible but degrades harmonic distortion and reduces effective SNR by ~2–3dB due to common-mode noise susceptibility. Input common-mode voltage must be set to 0.5V–2.0V depending on configuration and reference selection.

How does the MODE pin affect the operation of the LTC2287CUP#TRPBF?

The MODE pin on the LTC2287CUP#TRPBF configures two independent functions: output data format (offset binary or 2's complement) and clock duty cycle stabilizer enable/disable. Ground selects offset binary + stabilizer off; 1/3 VDD selects offset binary + stabilizer on; 2/3 VDD selects 2's complement + stabilizer on; VDD selects 2's complement + stabilizer off. This pin affects both channels simultaneously and must be set during power-up initialization.

Can the LTC2287CUP#TRPBF operate with different supply voltages for analog and digital sections?

Yes, the LTC2287CUP#TRPBF uses separate supplies: VDD (2.7V–3.4V) powers the analog core and references, while OVDD (0.5V–3.6V) powers the digital output drivers. This allows interfacing with diverse logic families (e.g., 1.8V FPGA I/O or 3.3V microcontroller) without level shifters. OGND and GND must be connected together at a single point near the device to minimize ground bounce and ensure accurate reference stability.

What is the purpose of the SENSEA and SENSEB pins on the LTC2287CUP#TRPBF?

The SENSEA and SENSEB pins on the LTC2287CUP#TRPBF program the analog input range for each channel independently. Tying SENSEA to VCMA selects ±0.5V range; tying to VDD selects ±1V; applying an external voltage between 0.5V and 1.0V sets ±VSENSEA range. This eliminates external gain-setting resistors and enables dynamic range optimization per channel based on signal amplitude-critical in multi-sensor systems with varying output levels.