Analog Devices Inc. LTC2293IUP#PBF

Overview

LTC2293IUP#PBF from Analog Devices (formerly Linear Technology) is a dual 12-bit, 65Msps low-power 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 serves as a high-fidelity digitizer for wideband RF and imaging signal chains.

For engineers reviewing the LTC2293IUP#PBF datasheet, LTC2293IUP#PBF pinout, LTC2293IUP#PBF application, or LTC2293IUP#PBF equivalent, key selection criteria include its 65Msps sample rate, dual-channel 12-bit resolution, 575MHz full-power bandwidth, flexible ±0.5V to ±1V input range, and QFN-64 package with exposed thermal pad.

Technical Context

The LTC2293IUP#PBF implements a six-stage CMOS pipelined ADC architecture per channel, with 5-cycle pipeline latency and integrated clock duty cycle stabilizer enabling robust operation across wide input clock duty cycles. It supports independent or multiplexed digital output buses with separate OE/SHDN controls per channel.

Each channel features differential analog inputs (AINA±, AINB±), programmable reference via SENSEA/SENSEB pins, internal 1.5V VCM bias (VCMA/VCMB), and configurable output format (offset binary or 2's complement) via MODE pin. The device operates over –40°C to +85°C and uses an internal reference unless externally overridden.

Key Specifications

Pinout & Package

Package: 64-lead (9mm × 9mm) plastic QFN with exposed thermal pad (Pin 65 = GND), θ_JA = 20°C/W, T_JMAX = 125°C. Exposed pad must be soldered to PCB ground plane for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9233BCPZ-65 and LTC2292IUP#PBF, the LTC2293IUP#PBF uniquely delivers integrated dual-channel 65Msps conversion with guaranteed 110dB isolation and per-channel power control - essential for compact, high-fidelity I/Q and MIMO signal acquisition where board space and timing alignment are critical.

Availability

LTC2293IUP#PBF is available at Aetrix Electronics and suitable for wireless infrastructure, medical imaging, spectral analysis, and portable instrumentation requiring stable component supply across industrial temperature ranges.

Supply support for LTC2293IUP#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 precision instrumentation, communications, and industrial markets.

The LTC2293IUP#PBF belongs to ADI's high-speed precision ADC product line, engineered for demanding RF and imaging applications requiring simultaneous dual-channel sampling, low power, and exceptional dynamic range.

FAQ

What is the operating temperature range for the LTC2293IUP#PBF?

The LTC2293IUP#PBF is rated for industrial operation from –40°C to +85°C, as indicated by the "I" grade suffix in the part number. This range is validated across all AC and DC specifications in the datasheet, including SNR, SFDR, INL, and power consumption - making it suitable for outdoor base stations and portable medical equipment.

Does the LTC2293IUP#PBF require external reference components?

No - the LTC2293IUP#PBF includes an internal 1.5V reference and supports fully self-contained operation using only the internal reference and SENSEA/SENSEB pins to configure input range. External reference bypassing (REFHA/REFLA/REFHB/REFLB) is required only when overriding the internal reference, but is not mandatory for standard ±1V differential operation.

Can the LTC2293IUP#PBF operate with a single-ended clock input?

Yes - the LTC2293IUP#PBF accepts a single-ended CLK input on CLKA and CLKB pins, with sampling triggered on the rising edge. Its integrated clock duty cycle stabilizer allows reliable operation even with non-50% duty cycle clocks (e.g., from FPGA PLLs), eliminating need for external duty cycle correction circuits.

How does the multiplexed output mode work on the LTC2293IUP#PBF?

In multiplexed mode (MUX pin low), both channels share a single 12-bit bus: Channel A outputs appear on DB0–DB11/OFB, and Channel B outputs appear on DA0–DA11/OFA. This reduces interface pin count by 50% versus separate bus mode, enabling connection to microcontrollers or FPGAs with limited I/O resources while maintaining full dual-channel throughput.

What thermal considerations apply to the LTC2293IUP#PBF's exposed pad?

The exposed pad (Pin 65) of the LTC2293IUP#PBF must be soldered directly to a solid PCB ground plane to achieve θ_JA = 20°C/W and prevent junction temperature exceedance. Thermal vias under the pad (minimum 4×0.3mm diameter) are recommended; insufficient grounding causes >20°C rise in T_J at full 400mW dissipation, risking parametric drift or reliability failure.