Analog Devices Inc. LTC2293CUP#PBF

Overview

LTC2293CUP#PBF from Analog Devices (formerly Linear Technology) is a dual 12-bit, 65Msps analog-to-digital converter operating from a single 3V supply (2.7V–3.4V), delivering 71.3dB SNR and 90dB SFDR at Nyquist with 110dB channel isolation at 100MHz. It features integrated clock duty cycle stabilization, flexible ±0.5V to ±1V differential input range, and multiplexed or separate 12-bit parallel digital outputs - deployed in high-speed imaging and broadband communications front-ends.

For engineers reviewing the LTC2293CUP#PBF datasheet, LTC2293CUP#PBF pinout, LTC2293CUP#PBF application, or LTC2293CUP#PBF equivalent, key selection criteria include its guaranteed 0°C to 70°C industrial temperature grade, 575MHz full-power bandwidth sample-and-hold, low 400mW total power dissipation, and pin-compatible family scalability across 25/40/65Msps variants.

Technical Context

The LTC2293CUP#PBF implements a six-stage CMOS pipelined ADC architecture with deterministic 5-cycle pipeline latency and independent channel control via SHDNA/SHDNB and OEA/OEB pins. Its dual-channel design supports synchronous or asynchronous sampling with separate CLKA/CLKB inputs and configurable output format (offset binary or 2's complement) via the MODE pin.

It integrates on-chip reference buffers, programmable input range selection via SENSEA/SENSEB pins, and a dedicated clock duty cycle stabilizer that maintains AC performance across 35%–65% input clock duty cycles - critical for systems using non-50% clocks from PLLs or FPGA I/O.

Key Specifications

Pinout & Package

Package: 64-lead (9mm × 9mm) plastic QFN with exposed GND pad (Pin 65), rated for 0°C to 70°C operation. Requires soldering of exposed pad to PCB ground plane 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 LTC2292CUP#PBF and AD9233BCPZ-65, the LTC2293CUP#PBF uniquely delivers dual-channel 65Msps conversion in a single 64-QFN package with guaranteed 110dB isolation - eliminating inter-channel skew and reducing system-level synchronization overhead in time-critical applications.

Availability

LTC2293CUP#PBF is available at Aetrix Electronics and suitable for wireless infrastructure, medical imaging, spectral analysis, and portable instrumentation requiring stable component supply and long-term production continuity.

Supply support for LTC2293CUP#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC2293CUP#PBF belongs to ADI's high-speed data converter product line, engineered specifically for demanding communications and imaging applications requiring dual-channel synchronization, low power, and exceptional dynamic range at intermediate frequencies.

FAQ

What is the operating temperature range for the LTC2293CUP#PBF?

The LTC2293CUP#PBF is specified for commercial-grade operation from 0°C to 70°C ambient temperature. This is indicated by the "C" suffix in the part number and confirmed in the Absolute Maximum Ratings table. The device maintains full performance specifications - including 71.3dB SNR and ±0.3LSB INL - across this entire range without derating. For extended temperature applications, the LTC2293IUP#PBF variant (-40°C to +85°C) is available.

Does the LTC2293CUP#PBF support single-ended analog inputs?

Yes, the LTC2293CUP#PBF supports single-ended analog inputs, though differential drive is recommended for optimal AC performance. When configured for single-ended operation, the input common-mode voltage must be set between 0.5V and 2.0V (per datasheet Note 7), and harmonic distortion degrades relative to differential mode. The device retains full functionality - including clock duty cycle stabilization and programmable input range - regardless of input configuration. Designers should verify SNR/SFDR degradation against system requirements using Figure 8 test circuit conditions.

How does the MODE pin affect the LTC2293CUP#PBF's output behavior?

The MODE pin on the LTC2293CUP#PBF controls both output data format (offset binary vs. 2's complement) and clock duty cycle stabilizer (DCS) activation. Ground selects offset binary with DCS disabled; 1V (⅓ VDD) selects offset binary with DCS enabled; 2V (⅔ VDD) selects 2's complement with DCS enabled; and VDD selects 2's complement with DCS disabled. This dual function allows hardware-selectable data representation and clock conditioning without firmware intervention - critical for interoperability with legacy DSPs or FPGA IP cores expecting specific formats.

Can the LTC2293CUP#PBF's digital outputs drive 1.8V logic directly?

Yes, the LTC2293CUP#PBF's digital outputs can drive 1.8V logic directly via the OVDD supply pin. When OVDD is set to 1.8V, the outputs guarantee VOH ≥ 1.79V and VOL ≤ 0.09V at 1.6mA sink/source current - meeting standard 1.8V CMOS input thresholds. This eliminates level-shifting circuitry when interfacing with modern low-voltage FPGAs or ASICs. The OVDD pin must be bypassed with a 0.1µF ceramic capacitor to OGND, and OGND must be connected to system digital ground.

What is the purpose of the exposed pad (Pin 65) on the LTC2293CUP#PBF?

The exposed pad (Pin 65) on the LTC2293CUP#PBF is electrically and thermally connected to internal GND and must be soldered to a PCB ground plane. It serves two critical functions: (1) lowers thermal resistance (θJA = 20°C/W) to maintain junction temperature below 125°C at 400mW dissipation, and (2) provides low-inductance grounding for analog and digital return currents - essential for achieving specified 71.3dB SNR and 90dB SFDR. Leaving the pad unconnected or floating will cause thermal runaway and severe AC performance degradation.