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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Analog Devices Inc. ADA4891-1ARZ

Name: ADA4891-1ARZ
Brand: Analog Devices Inc.
SKU: ADA4891-1ARZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADA4891-1ARZ

Manufacturer:: Analog Devices Inc.

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: ADA4891-1ARZ.pdf

Description:: IC OPAMP GP 1 CIRCUIT 8SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ADA4891-1ARZ from Analog Devices is a single-channel, rail-to-rail output CMOS high-speed operational amplifier optimized for video, imaging, and active filter applications. It delivers 220 MHz −3 dB bandwidth (G = +1), 170 V/μs slew rate, 28 ns settling to 0.1%, and operates from 2.7 V to 5.5 V supply with output swing within 50 mV of rails.

For engineers reviewing the ADA4891-1ARZ datasheet, ADA4891-1ARZ pinout, ADA4891-1ARZ application, or ADA4891-1ARZ equivalent, this page provides verified specifications, SOIC-8 package layout, automotive-qualified performance data, and real-world use cases in coaxial cable drivers and photodiode preamplifiers.

Technical Context

The ADA4891-1ARZ employs a voltage-feedback architecture with true single-supply operation and input common-mode range extending 300 mV below the negative rail. Its rail-to-rail output stage supports full dynamic range in low-voltage systems, while internal compensation ensures stability with capacitive loads up to 47 pF.

It features low 9 nV/√Hz input voltage noise at 1 MHz and −79 dBc SFDR at 1 MHz, enabling high-fidelity signal conditioning in consumer video and CCD buffer circuits without external gain-setting resistors for unity-gain stable operation.

Key Specifications

Parameter	Value and Actual Design Meaning
−3 dB Bandwidth	220 MHz at G = +1 - supports high-definition video signal paths and fast pulse amplification
Slew Rate	170 V/μs - enables clean reproduction of 2 V step signals with minimal distortion
Settling Time	28 ns to 0.1% - meets timing-critical requirements in active filters and multiplexed imaging systems
Supply Range	2.7 V to 5.5 V - compatible with both 3.3 V and 5 V industrial and automotive power domains
Output Swing	Within 50 mV of rails - maximizes signal headroom in single-supply 3 V or 5 V designs
Quiescent Current	4.4 mA per amplifier - balances speed and power efficiency for battery-sensitive portable video equipment
Input Voltage Noise	9 nV/√Hz at 1 MHz - preserves SNR in photodiode preamp and contact image sensor front-ends

Pinout & Package

The ADA4891-1ARZ is packaged in an 8-lead SOIC_N (R-8) with exposed pad for thermal enhancement. Pin 1 is NC (no connect), pins 2 and 3 are inverting and non-inverting inputs, pin 4 is negative supply (−VS), pin 6 is output, pin 7 is positive supply (+VS), and pins 5 and 8 are NC.

Pin/Terminal	Circuit Role	Design Meaning
1	NC	No internal connection; must be left floating or tied to ground for mechanical stability
2	Inverting Input (−IN)	Differential input node; accepts feedback network for inverting configurations
3	Non-Inverting Input (+IN)	High-impedance input node; supports DC-coupled sensor interfaces with 5 GΩ input resistance
4	Negative Supply (−VS)	Reference for dual-supply operation; supports −0.3 V to +VS − 0.8 V common-mode range
6	Output (OUT)	Rail-to-rail capable output driving up to 125 mA into 1 kΩ load
7	Positive Supply (+VS)	Main power rail; supplies quiescent current and output drive capability
5, 8	NC	No internal connection; electrically isolated and thermally benign

Key Features

Feature	Design Value
Rail-to-rail output	Swings within 50 mV of supply rails, preserving >98% of available dynamic range in 3.3 V systems
Automotive qualification	Specified over −40°C to +125°C, qualified per AEC-Q100 for infotainment and ADAS signal chains
Low distortion	−79 dBc SFDR at 1 MHz enables clean analog reconstruction in NTSC/PAL video buffers
Video-optimized specs	0.05% differential gain / 0.25° differential phase error at 25 MHz ensures broadcast-grade color fidelity
Capacitive load drive	Stable with up to 47 pF load, eliminating need for isolation resistors in coaxial cable driver layouts

Applications

Consumer Video Reconstruction	CCD Image Sensor Buffer
Use Scenario: Reconstructing composite video signals in set-top boxes and DVD players using 150 Ω back-terminated coaxial lines. IC Role / Device Role / Timing Role: High-speed voltage follower and gain-of-two driver with precise gain flatness and phase linearity. Use Value: Maintains 0.1 dB gain flatness to 25 MHz and <0.3° phase error, preventing chroma delay and hue shift in NTSC signals.	Use Scenario: Amplifying low-level analog outputs from linear CCD arrays in document scanners and fax machines. IC Role / Device Role / Timing Role: Low-noise, fast-settling buffer with rail-to-rail output swing to maximize ADC input utilization. Use Value: 9 nV/√Hz input noise and 28 ns settling ensure high SNR and pixel clock alignment across multi-line sensors.
Coaxial Cable Driver	Photodiode Transimpedance Preamp
Use Scenario: Driving 75 Ω or 150 Ω coaxial cables in security camera video distribution systems. IC Role / Device Role / Timing Role: Unity-gain stable driver with high output current (125 mA) and low output impedance (<1 Ω at 10 MHz). Use Value: Delivers full 2 V_p-p signal into 150 Ω load with <0.1 dB ripple to 25 MHz, minimizing inter-symbol interference.	Use Scenario: Converting photocurrent from high-speed photodiodes in optical encoders and laser rangefinders. IC Role / Device Role / Timing Role: Low-input-bias-current (±50 pA typical), low-noise transimpedance amplifier with wide bandwidth. Use Value: Enables sub-ns pulse response and >70 dB dynamic range without compromising stability via TIA feedback compensation.

Consumer Video Reconstruction

CCD Image Sensor Buffer

Use Scenario: Reconstructing composite video signals in set-top boxes and DVD players using 150 Ω back-terminated coaxial lines.

IC Role / Device Role / Timing Role: High-speed voltage follower and gain-of-two driver with precise gain flatness and phase linearity.

Use Value: Maintains 0.1 dB gain flatness to 25 MHz and <0.3° phase error, preventing chroma delay and hue shift in NTSC signals.

Use Scenario: Amplifying low-level analog outputs from linear CCD arrays in document scanners and fax machines.

IC Role / Device Role / Timing Role: Low-noise, fast-settling buffer with rail-to-rail output swing to maximize ADC input utilization.

Use Value: 9 nV/√Hz input noise and 28 ns settling ensure high SNR and pixel clock alignment across multi-line sensors.

Coaxial Cable Driver

Photodiode Transimpedance Preamp

Use Scenario: Driving 75 Ω or 150 Ω coaxial cables in security camera video distribution systems.

IC Role / Device Role / Timing Role: Unity-gain stable driver with high output current (125 mA) and low output impedance (<1 Ω at 10 MHz).

Use Value: Delivers full 2 V_p-p signal into 150 Ω load with <0.1 dB ripple to 25 MHz, minimizing inter-symbol interference.

Use Scenario: Converting photocurrent from high-speed photodiodes in optical encoders and laser rangefinders.

IC Role / Device Role / Timing Role: Low-input-bias-current (±50 pA typical), low-noise transimpedance amplifier with wide bandwidth.

Use Value: Enables sub-ns pulse response and >70 dB dynamic range without compromising stability via TIA feedback compensation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADA4895-1ARZ	Higher bandwidth (1.05 GHz), lower noise (4 nV/√Hz), but higher quiescent current (11.5 mA)	Better suited for RF IF amplification and ultra-low-noise instrumentation; over-specified for standard video buffering	Select ADA4895-1ARZ only when >500 MHz small-signal bandwidth or <5 nV/√Hz noise is required
LMH6629MA/NOPB	Similar bandwidth (250 MHz), higher slew rate (1000 V/μs), but no rail-to-rail output and wider supply range (2.7–12.6 V)	Preferred in high-slew applications like pulse amplification; unsuitable where rail-to-rail output swing is mandatory	Choose LMH6629MA/NOPB for >500 V/μs transient response, but verify output compliance with system rail constraints

Compared with ADA4895-1ARZ and LMH6629MA/NOPB, the ADA4891-1ARZ offers optimal balance of speed, rail-to-rail output, low power (4.4 mA), and video-optimized distortion performance - making it the most cost-effective choice for consumer video, imaging, and general-purpose high-speed buffering where full rail compliance and 220 MHz bandwidth suffice.

Availability

ADA4891-1ARZ is available at Aetrix Electronics and suitable for automotive infotainment systems, consumer video equipment, and industrial imaging modules requiring stable component supply across extended temperature ranges.

Supply support for ADA4891-1ARZ 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.

The ADA4891 family was designed specifically for cost-sensitive, high-speed signal conditioning in automotive, imaging, and video applications - delivering rail-to-rail output, low distortion, and robust operation from −40°C to +125°C.

FAQ

What is the maximum operating temperature for the ADA4891-1ARZ?

The ADA4891-1ARZ is specified to operate continuously from −40°C to +125°C. This extended temperature range is validated per AEC-Q100 stress testing and supports deployment in under-hood automotive environments and industrial edge computing nodes where ambient temperatures exceed 105°C.

Does the ADA4891-1ARZ support single-supply operation?

Yes, the ADA4891-1ARZ supports true single-supply operation with an input common-mode voltage range extending 300 mV below the negative rail and rail-to-rail output swing. At 3.3 V supply, it delivers full output swing from 50 mV to 3.25 V, enabling direct interfacing with ADCs and FPGAs without level-shifting circuitry.

What is the typical harmonic distortion performance of the ADA4891-1ARZ at 1 MHz?

At 1 MHz, the ADA4891-1ARZ achieves −79 dBc second-harmonic distortion and −93 dBc third-harmonic distortion with 2 V_p-p output at G = +1 and 5 V supply. This low distortion supports broadcast-quality video reconstruction and high-fidelity active filtering without post-compensation.

Can the ADA4891-1ARZ drive a 150 Ω coaxial cable load?

Yes, the ADA4891-1ARZ is characterized to drive 150 Ω loads with 2 V_p-p output, delivering 125 mA linear output current. Its −3 dB large-signal bandwidth remains 40 MHz into 150 Ω, and 0.1 dB gain flatness extends to 25 MHz - meeting SMPTE 259M and other broadcast video standards.

Is the ADA4891-1ARZ pin-compatible with other members of the ADA4891 family?

No, the ADA4891-1ARZ (8-lead SOIC) is not pin-compatible with the ADA4891-2, -3, or -4 variants due to differing channel counts and pin assignments. The ADA4891-2ARZ uses identical SOIC-8 packaging but has different pinout (dual-channel); the -3 and -4 versions use 14-lead packages. Always consult Figure 1 and Figure 3 of the Rev. F datasheet before PCB layout.

ADA4891-1ARZ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Active

Amplifier Type:: General Purpose

Number of Circuits:: 1

Output Type:: Rail-to-Rail

Slew Rate:: 210V/µs

Gain Bandwidth Product:: -

-3db Bandwidth:: 240 MHz

Current - Input Bias:: 2 pA

Voltage - Input Offset:: 2.5 mV

Current - Supply:: 4.4mA

Current - Output / Channel:: 125 mA

Voltage - Supply Span (Min):: 2.7 V

Voltage - Supply Span (Max):: 5.5 V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

ADA4891-1ARZ FAQ

1.How can I place an order for ADA4891-1ARZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ADA4891-1ARZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ADA4891-1ARZ reliable?

The price and inventory of ADA4891-1ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4891-1ARZ is usually 5 days.

3.What payment methods are accepted for ADA4891-1ARZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4891-1ARZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADA4891-1ARZ?

ADA4891-1ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADA4891-1ARZ order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ADA4891-1ARZ?

For technical support, including ADA4891-1ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4891-1ARZ requirements.

6.How does Aetrix verify that ADA4891-1ARZ is sourced from the original manufacturer or authorized distributors?

All ADA4891-1ARZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADA4891-1ARZ meets industry standards.

7.What is the process for return or replacement of ADA4891-1ARZ?

All ADA4891-1ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADA4891-1ARZ, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ADA4891-1ARZ part is unused and in its original packaging.

Return procedure for ADA4891-1ARZ:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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