Analog Devices Inc. ADA4858-3ACPZ-R7

Overview

ADA4858-3ACPZ-R7 from Analog Devices is a single-supply, triple current-feedback op amp with integrated charge pump, delivering −3.3 V to −1.8 V negative rail generation, 600 MHz −3 dB bandwidth, 600 V/µs slew rate, and 0.1% settling in 18 ns. It enables dc-coupled video signal conditioning in professional broadcast equipment without dual supplies.

For engineers reviewing the ADA4858-3ACPZ-R7 datasheet, ADA4858-3ACPZ-R7 pinout, ADA4858-3ACPZ-R7 application, or ADA4858-3ACPZ-R7 equivalent, key selection criteria include charge pump output capability (−3 V @ 50 mA), input common-mode range (−1.8 V to +3.8 V at 5 V), differential gain error (0.01%), and LFCSP-16 thermal performance across −40°C to +105°C.

Technical Context

The ADA4858-3ACPZ-R7 uses current feedback architecture with 90 Ω −IN impedance and 15 MΩ +IN resistance, enabling stable high-gain configurations up to G = 5 while maintaining 85 MHz 0.1 dB flatness. Its charge pump operates independently of amplifier power-down state, sustaining −3 V output at up to 150 mA sink current for external use when supplied from +5 V.

Input common-mode voltage extends 1.8 V below ground and 1.2 V below +VS, supporting true dc-coupled video clamping. Output swing reaches −1.7 V to +3.7 V at 5 V supply, with 21 mA linear output current into 150 Ω at 1 MHz and HD2 ≤ −50 dBc-critical for YPbPr and RGB video driver stages.

Key Specifications

Pinout & Package

ADA4858-3ACPZ-R7 is housed in a 16-lead 3 mm × 3 mm LFCSP package with exposed pad (EPAD) requiring connection to ground for thermal and electrical integrity. The package supports high-density PCB layouts and provides low-inductance paths for charge pump capacitor routing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADA4857-3ACPZ-R7 and THS3203DGN, the ADA4858-3ACPZ-R7 uniquely integrates charge pump functionality-enabling single-supply dc-coupled video operation without layout complexity or efficiency loss from external DC/DC converters-while maintaining broadcast-grade linearity and settling performance.

Availability

ADA4858-3ACPZ-R7 is available at Aetrix Electronics and suitable for professional video distribution, consumer HD interface design, medical imaging signal chains, industrial machine vision camera development, and broadcast equipment requiring stable component supply with guaranteed long-term availability.

Supply support for ADA4858-3ACPZ-R7 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, headquartered in Norwood, MA, with R&D and manufacturing operations worldwide.

The ADA4858-3ACPZ-R7 belongs to Analog Devices' high-speed video amplifier product line, engineered specifically for SD/HD video signal conditioning, dc-coupled clamping, and single-supply broadcast infrastructure where precision, speed, and power efficiency are critical.

FAQ

What is the maximum output current capability of the ADA4858-3ACPZ-R7 charge pump for external use?

The ADA4858-3ACPZ-R7 charge pump delivers up to 50 mA at −3 V for external components when operating from a +5 V supply. At +3.3 V supply, the available external current drops to 45 mA at −2 V. This output remains active even when the amplifiers are in power-down mode, enabling shared negative rail generation across multiple ICs in compact video systems.

Can the ADA4858-3ACPZ-R7 drive two 75 Ω video loads simultaneously on a single 5 V supply?

Yes, the ADA4858-3ACPZ-R7 can drive two doubly terminated 75 Ω video loads (equivalent to 150 Ω per channel) simultaneously from a single +5 V supply. Its output stage delivers 2 V_p-p signals with 85 MHz 0.1 dB flatness and <0.02° differential phase error-meeting SMPTE 253M requirements for professional video routing applications.

How does the ADA4858-3ACPZ-R7 support dc-coupled video with 0 V black level reference?

The ADA4858-3ACPZ-R7 supports dc-coupled video by generating an internal −3 V negative rail via its integrated charge pump. This allows the output to swing to −1.7 V, enabling precise 0 V black-level referencing and −300 mV sync-tip restoration in YPbPr systems without external coupling capacitors or negative supplies.

What is the input common-mode voltage range of the ADA4858-3ACPZ-R7 at 5 V supply?

At +5 V supply, the ADA4858-3ACPZ-R7 features an input common-mode voltage range of −1.8 V to +3.8 V. This extends 1.8 V below ground and 1.2 V below the positive rail, permitting direct connection of ac-coupled video sources with negative sync tips and enabling robust dc-restore functionality in clamp amplifier configurations.

Does the power-down feature affect the charge pump operation in the ADA4858-3ACPZ-R7?

No-the power-down feature in the ADA4858-3ACPZ-R7 disables only the three amplifier cores, reducing total quiescent current to 2.5 mA, while the charge pump remains fully operational. Pin 4 (CPO) continues delivering regulated negative voltage, allowing external circuits to remain powered during amplifier standby-critical for always-on video monitoring functions.