Analog Devices Inc. AD8045ACPZ-REEL7

Overview

AD8045ACPZ-REEL7 from Analog Devices is a unity-gain stable, voltage-feedback operational amplifier optimized for ultralow distortion, high-speed signal conditioning in precision RF and data acquisition systems. It delivers 1 GHz −3 dB bandwidth (G = +1), 1350 V/µs slew rate, 3 nV/√Hz input voltage noise, and −90 dBc SFDR at 20 MHz - enabling high-fidelity ADC driving and IF amplification in ultrasound and automated test equipment.

For engineers reviewing the AD8045ACPZ-REEL7 datasheet, AD8045ACPZ-REEL7 pinout, AD8045ACPZ-REEL7 application, or AD8045ACPZ-REEL7 equivalent, key selection criteria include harmonic distortion performance at 5–70 MHz, thermal management via exposed paddle, low-distortion LFCSP pinout layout advantages, and single- or dual-supply operation from 3.3 V to ±6 V.

Technical Context

The AD8045ACPZ-REEL7 employs Analog Devices' second-generation XFCB bipolar process with an H-bridge input stage to achieve 1350 V/µs slew rate and 3 nV/√Hz noise while maintaining stability at unity gain. Its low-distortion LFCSP pinout physically separates +IN from −VS to suppress second-harmonic generation and integrates a dedicated feedback pin to minimize parasitic inductance in high-frequency layouts.

It supports both single-supply (3.3 V to 12 V) and dual-supply (±1.65 V to ±6 V) operation, with rail-to-rail output swing (−3.9 V to +3.9 V on ±5 V), 7.5 ns 0.1% settling time, and robust capacitive load drive up to 18 pF - making it suitable for driving ADC inputs and active filter stages without external compensation.

Key Specifications

Pinout & Package

The AD8045ACPZ-REEL7 is housed in a 3 mm × 3 mm, 8-lead LFCSP package with exposed paddle (CP-8), optimized for low thermal resistance (θJC = 35°C/W) and high-frequency layout integrity. The exposed paddle must be left floating or connected to −VS for optimal thermal and distortion performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMH6629MA/NOPB and ADA4898-1ARZ-R7, the AD8045ACPZ-REEL7 uniquely combines 1 GHz bandwidth, 1350 V/µs slew rate, 3 nV/√Hz noise, and LFCSP-specific low-distortion pinout - making it the only option qualified for 65+ MSPS ADC driver designs requiring <−90 dBc SFDR at 20 MHz with minimal PCB footprint.

Availability

AD8045ACPZ-REEL7 is available at Aetrix Electronics and suitable for ultrasound imaging systems, automated test equipment (ATE), high-speed data acquisition, and communications infrastructure requiring stable component supply across extended temperature and long production lifecycles.

Supply support for AD8045ACPZ-REEL7 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 semiconductors, serving precision instrumentation, industrial automation, and communications markets since 1965.

The AD8045ACPZ-REEL7 belongs to Analog Devices' high-speed op amp product line, engineered specifically for ultralow distortion and wideband signal integrity in RF, medical imaging, and high-resolution data conversion applications.

FAQ

What is the recommended power supply bypassing scheme for AD8045ACPZ-REEL7?

For optimal high-frequency performance, place a 0.1 µF ceramic capacitor (0508 case) directly between each supply pin (+VS and −VS) and the ground plane, with shortest possible traces. Add a 10 µF electrolytic capacitor in parallel for low-frequency decoupling. Return all capacitor grounds near the load to minimize distortion; avoid shared return paths. The AD8045ACPZ-REEL7's exposed paddle must remain floating or tied to −VS - never to ground.

Can AD8045ACPZ-REEL7 operate from a single 5 V supply?

Yes, the AD8045ACPZ-REEL7 supports single-supply operation from 3.3 V to 12 V. With +5 V and −VS grounded, it delivers 1.1 V to 4.0 V output swing into 1 kΩ, 1.2 V to 3.8 V into 100 Ω, and maintains −83 dBc HD3 at 5 MHz. Input common-mode range is 1.2 V to 3.8 V, requiring level-shifting for ground-referenced signals. Quiescent current remains 15–18 mA.

How does the low-distortion pinout of AD8045ACPZ-REEL7 improve second-harmonic performance?

The AD8045ACPZ-REEL7 LFCSP pinout physically isolates the +IN pin (Pin 3) from the −VS pin (Pin 4), reducing coupling-induced second-harmonic generation. Combined with a dedicated FEEDBACK pin (Pin 1), this layout minimizes parasitic inductance in the feedback path and improves symmetry - delivering −102 dBc HD2 at 5 MHz in LFCSP, versus −97 dBc in SOIC. This difference is measurable in FFTs of high-fidelity signal chains.

Is AD8045ACPZ-REEL7 suitable for driving the AD9244 14-bit ADC?

Yes, the AD8045ACPZ-REEL7 is explicitly validated as a dc-coupled differential driver for the AD9244 in Analog Devices' datasheet (Figure 67). It achieves <−90 dBc SFDR at 20 MHz, settles to 0.1% in 7.5 ns, and provides matched gain/phase across I/Q paths. Its 1350 V/µs slew rate supports full-scale transitions without missing codes, and its output swing aligns with the AD9244's 2.5 V common-mode requirement.

What thermal considerations apply to AD8045ACPZ-REEL7 in continuous operation?

The AD8045ACPZ-REEL7 has θJA = 93°C/W (LFCSP) and θJC = 35°C/W. At 15 mA quiescent current and ±5 V supplies, dissipation is ~150 mW; junction temperature rise is ~14°C above ambient. For ambient temperatures up to +105°C, ensure PCB copper area under the exposed paddle is ≥100 mm² and avoid enclosing the device. Derate maximum ambient by 1°C per 1.1 mW above 150 mW to stay below 150°C TJ limit.