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

Analog Devices Inc. ADA4891-3ARZ

Name: ADA4891-3ARZ
Brand: Analog Devices Inc.
SKU: ADA4891-3ARZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADA4891-3ARZ

Manufacturer:: Analog Devices Inc.

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: ADA4891-3ARZ.pdf

Description:: IC CMOS 3 CIRCUIT 14SOIC

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Product details

Overview

ADA4891-3ARZ from Analog Devices is a triple-channel, rail-to-rail output, CMOS high-speed operational amplifier optimized for video and imaging signal conditioning. It delivers 220 MHz −3 dB bandwidth (G = +1), 170 V/µs slew rate, 28 ns settling to 0.1%, and 0.05% differential gain error at 25 MHz - enabling precise NTSC video reconstruction in automotive infotainment and contact image sensor buffers.

For engineers reviewing the ADA4891-3ARZ datasheet, ADA4891-3ARZ pinout, ADA4891-3ARZ application, or ADA4891-3ARZ equivalent, key selection criteria include its 14-lead SOIC package with integrated power-down pins (PD1–PD3), 2.7 V to 5.5 V single-supply operation, rail-to-rail output swing within 50 mV of rails, and guaranteed −40°C to +125°C automotive temperature performance.

Technical Context

The ADA4891-3ARZ implements a fully differential input stage with 5 GΩ input resistance and 3.2 pF input capacitance, supporting true single-supply operation with input common-mode range extending 300 mV below the negative rail. Its rail-to-rail output stage uses complementary bipolar-CMOS circuitry to sustain 125 mA linear output current while maintaining 79 dBc SFDR at 1 MHz.

Unlike standard op-amps, the ADA4891-3ARZ integrates three independent power-down control pins (PD1, PD2, PD3) - each with 1.3 V (3 V supply) or 2.4 V (5 V supply) threshold - enabling selective channel shutdown with 49 ns turn-off time and <0.8 mA quiescent current per disabled amplifier, critical for dynamic power management in multi-channel imaging systems.

Key Specifications

Parameter	Value and Actual Design Meaning
−3 dB Bandwidth	220 MHz at G = +1 (5 V); enables wideband video and clock buffer applications up to 25 MHz 0.1 dB flatness.
Slew Rate	170 V/µs (5 V); supports fast transient response for 2 V step signals with minimal distortion.
Settling Time	28 ns to 0.1% (G = +2); ensures accurate pulse fidelity in CCD and contact image sensor readout timing.
Differential Gain/Phase	0.05% / 0.25° (NTSC, RL = 150 Ω); meets broadcast-grade video linearity requirements.
Supply Range	2.7 V to 5.5 V; compatible with modern low-voltage automotive and portable imaging power rails.
Output Swing	Within 50 mV of both rails (RL = 1 kΩ); maximizes dynamic range in single-supply 3.3 V or 5 V systems.
Quiescent Current	4.4 mA per amplifier (5 V); balances speed and power efficiency for triple-channel operation.

Pinout & Package

ADA4891-3ARZ is housed in a 14-lead SOIC_N (R-14) package with exposed pad (RoHS-compliant, Pb-free). Pinout follows Figure 4 in Rev. F datasheet: 14-pin layout with three independent amplifiers, shared ±VS rails, and dedicated power-down inputs PD1–PD3.

Pin/Terminal	Circuit Role	Design Meaning
1 (PD1)	Power-down control for Amp1	Active-high logic input; drives Amp1 into 0.8 mA shutdown state when >2.4 V (5 V supply).
2 (OUT2)	Amplifier 2 output	Rail-to-rail output capable of sourcing 205 mA / sinking 307 mA into 150 Ω loads.
3 (PD2)	Power-down control for Amp2	Independent enable/disable for second channel; supports staggered power sequencing.
4 (–IN2)	Inverting input of Amp2	High-impedance node (5 GΩ) with 3.2 pF capacitance; requires careful PCB layout for stability.
5 (PD3)	Power-down control for Amp3	Third independent shutdown pin; enables full system-level power gating across all three channels.
6 (+IN2)	Non-inverting input of Amp2	Supports input common-mode range from −VS − 0.3 V to +VS − 0.8 V for true single-supply use.
7 (OUT1)	Amplifier 1 output	Primary output for high-fidelity video buffering; specified for 0.05% differential gain error.
8 (OUT3)	Amplifier 3 output	Identical performance to OUT1/OUT2; allows simultaneous processing of RGB or YUV signal paths.
9 (–IN3)	Inverting input of Amp3	Matched to other inverting inputs; supports precision active filter configurations with external feedback.
10 (+IN3)	Non-inverting input of Amp3	Enables unity-gain follower or non-inverting gain stages without level-shifting circuitry.
11 (–VS)	Negative supply rail	Accepts ground or negative voltage; input extends 300 mV below this rail for flexible biasing.
12 (+IN1)	Non-inverting input of Amp1	First channel input; optimized for photodiode preamp and coaxial cable driver topologies.
13 (–IN1)	Inverting input of Amp1	Used in inverting gain configurations (e.g., G = −1, −2); maintains 88 dB CMRR over 0–3 V common-mode range.
14 (+VS)	Positive supply rail	Supplies all three amplifiers; PSRR of 65 dB (positive) and 63 dB (negative) minimizes supply noise coupling.

Key Features

Feature	Design Value
Triple-channel integration with independent power-down	Reduces board space and inter-channel crosstalk vs. discrete op-amp solutions; enables per-channel power gating in battery-sensitive imaging modules.
Rail-to-rail output swing within 50 mV of rails	Preserves full signal headroom in 3.3 V systems, eliminating need for level-shifting or dual supplies in consumer video interfaces.
25 MHz 0.1 dB gain flatness (G = +2, RL = 150 Ω)	Meets SMPTE 259M and NTSC broadcast standards for SD video transmission without external equalization.
125 mA linear output current (1% THD @ 1 MHz)	Drives 150 Ω coaxial cables directly, removing external buffer stages in camera module output drivers.
−40°C to +125°C operating range	Qualified for under-hood automotive applications including ADAS camera front-ends and infotainment display drivers.

Applications

Automotive Camera Signal Conditioning	Consumer Video Reconstruction Filter
Use Scenario: Front-facing ADAS camera module outputting analog CVBS or Y/C signals to head-unit processor. IC Role / Device Role / Timing Role: Triple-channel video amplifier reconstructing luminance (Y), chrominance (C), and sync components with matched gain/phase. Use Value: 0.05% differential gain and 0.25° phase error ensure color fidelity across temperature; PD pins allow dynamic power reduction during parking mode.	Use Scenario: DVD player or set-top box driving composite video to legacy CRT or LCD displays via RCA connector. IC Role / Device Role / Timing Role: Single-supply video reconstruction filter with 150 Ω drive capability and DC restoration support. Use Value: Rail-to-rail output swing maximizes signal amplitude on 3.3 V rails; 220 MHz bandwidth preserves edge sharpness in 480i/576i video.
Contact Image Sensor Buffer	Coaxial Cable Driver for Security Cameras
Use Scenario: Flatbed scanner or document imager using linear CIS array with analog column readout. IC Role / Device Role / Timing Role: Three parallel amplifiers buffering R/G/B or grayscale pixel data streams before ADC sampling. Use Value: 28 ns settling time ensures accurate sampling of fast-moving scan lines; low 9 nV/√Hz input noise preserves SNR in low-light capture.	Use Scenario: IP security camera transmitting analog HD-over-Coax (AHD) video up to 500 m over RG59 cable. IC Role / Device Role / Timing Role: High-current driver stage compensating for cable loss and maintaining 0.1 dB flatness to 25 MHz. Use Value: 125 mA output current sustains 1 Vpp into 75 Ω load; 170 V/µs slew rate prevents edge rounding on 1080p timing pulses.

Automotive Camera Signal Conditioning

Consumer Video Reconstruction Filter

Use Scenario: Front-facing ADAS camera module outputting analog CVBS or Y/C signals to head-unit processor.

IC Role / Device Role / Timing Role: Triple-channel video amplifier reconstructing luminance (Y), chrominance (C), and sync components with matched gain/phase.

Use Value: 0.05% differential gain and 0.25° phase error ensure color fidelity across temperature; PD pins allow dynamic power reduction during parking mode.

Use Scenario: DVD player or set-top box driving composite video to legacy CRT or LCD displays via RCA connector.

IC Role / Device Role / Timing Role: Single-supply video reconstruction filter with 150 Ω drive capability and DC restoration support.

Use Value: Rail-to-rail output swing maximizes signal amplitude on 3.3 V rails; 220 MHz bandwidth preserves edge sharpness in 480i/576i video.

Contact Image Sensor Buffer

Coaxial Cable Driver for Security Cameras

Use Scenario: Flatbed scanner or document imager using linear CIS array with analog column readout.

IC Role / Device Role / Timing Role: Three parallel amplifiers buffering R/G/B or grayscale pixel data streams before ADC sampling.

Use Value: 28 ns settling time ensures accurate sampling of fast-moving scan lines; low 9 nV/√Hz input noise preserves SNR in low-light capture.

Use Scenario: IP security camera transmitting analog HD-over-Coax (AHD) video up to 500 m over RG59 cable.

IC Role / Device Role / Timing Role: High-current driver stage compensating for cable loss and maintaining 0.1 dB flatness to 25 MHz.

Use Value: 125 mA output current sustains 1 Vpp into 75 Ω load; 170 V/µs slew rate prevents edge rounding on 1080p timing pulses.

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
ADA4891-3ARMZ	Same electrical specs; packaged in 14-lead TSSOP (RU-14) with θJA = 108°C/W vs. SOIC's 162°C/W.	Better thermal performance in dense layouts; smaller footprint but requires finer-pitch assembly.	Select ADA4891-3ARMZ for space-constrained PCBs needing improved power dissipation; ADA4891-3ARZ preferred for legacy SOIC-compatible designs.
LMH6629MA/NOPB	Higher 1.5 GHz GBW but no power-down pins; 12 mA/quiescent current vs. 4.4 mA; only dual-channel.	Lacks triple-channel integration and channel-level shutdown; unsuitable for power-gated multi-signal paths.	Choose LMH6629MA/NOPB only when extreme bandwidth (>500 MHz) is required and power-down functionality is unnecessary.

Compared with ADA4891-3ARMZ, ADA4891-3ARZ offers higher thermal resistance but broader design reuse in existing SOIC footprints; versus LMH6629MA/NOPB, it trades raw bandwidth for triple-channel integration, lower power, and automotive-grade temperature support - making it optimal for cost-sensitive, thermally stable, multi-signal video systems.

Availability

ADA4891-3ARZ is available at Aetrix Electronics and suitable for automotive infotainment systems, contact image sensor buffers, and coaxial cable drivers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADA4891-3ARZ 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 technologies, headquartered in Norwood, MA.

The ADA4891 family was designed specifically for cost-sensitive, high-speed signal conditioning in automotive video, imaging, and communications systems - emphasizing rail-to-rail operation, low distortion, and robust temperature performance.

FAQ

What is the maximum operating temperature for the ADA4891-3ARZ?

The ADA4891-3ARZ is rated for continuous operation from −40°C to +125°C, meeting AEC-Q100 Grade 1 requirements for automotive under-hood applications. This specification is validated across all electrical parameters in the Rev. F datasheet, including bandwidth, distortion, and power-down timing, ensuring reliability in engine control units and ADAS camera modules where ambient temperatures exceed 105°C.

Does the ADA4891-3ARZ support true single-supply operation?

Yes, the ADA4891-3ARZ supports true single-supply operation with an input common-mode voltage range extending 300 mV below the negative rail (−VS − 0.3 V) and rail-to-rail output swing within 50 mV of both supply rails. This enables direct interfacing with sensors and ADCs in 3.3 V or 5 V systems without level-shifting circuitry - confirmed in the General Description and Input/Output Characteristics sections of the Rev. F datasheet.

How does the power-down feature work on the ADA4891-3ARZ?

The ADA4891-3ARZ includes three dedicated power-down pins (PD1, PD2, PD3) - one per amplifier - with logic thresholds of 2.4 V (5 V supply) or 1.3 V (3 V supply). When asserted, each pin reduces its associated amplifier's quiescent current to 0.8 mA and disables output drive within 49 ns. This per-channel control is unique to the ADA4891-3/ADA4891-4 variants and is documented in the Power-Down Pins section of the Rev. F datasheet.

Can the ADA4891-3ARZ drive a 150 Ω load at 2 V_PP with minimal distortion?

Yes, the ADA4891-3ARZ delivers 125 mA linear output current (1% THD at 1 MHz) and achieves −79 dBc SFDR at 1 MHz with 2 V_PP output into 150 Ω. Its 0.05% differential gain and 0.25° phase error at 25 MHz further confirm suitability for broadcast-quality video driving - all verified under RL = 150 Ω test conditions in Tables 1 and 2 of the Rev. F datasheet.

What package type is used for the ADA4891-3ARZ?

The ADA4891-3ARZ uses a 14-lead SOIC_N (R-14) package with dimensions of 8.65 mm × 3.90 mm × 1.75 mm and an exposed pad for enhanced thermal performance. This package is explicitly listed in the Ordering Guide and Connection Diagrams (Figure 4) of the Rev. F datasheet, and is distinct from the TSSOP variant (ADA4891-3ARMZ) which shares identical electrical specifications but differs in thermal resistance and footprint.

ADA4891-3ARZ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Active

Amplifier Type:: CMOS

Number of Circuits:: 3

Output Type:: Rail-to-Rail

Slew Rate:: 210V/µs

Gain Bandwidth Product:: 105 MHz

-3db Bandwidth:: 220 MHz

Current - Input Bias:: 2 pA

Voltage - Input Offset:: 2.5 mV

Current - Supply:: 4.4mA (x3 Channels)

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:: 14-SOIC

ADA4891-3ARZ FAQ

1.How can I place an order for ADA4891-3ARZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ADA4891-3ARZ 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 ADA4891-3ARZ reliable?

The price and inventory of ADA4891-3ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4891-3ARZ is usually 5 days.

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

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4891-3ARZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADA4891-3ARZ?

ADA4891-3ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADA4891-3ARZ 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 ADA4891-3ARZ?

For technical support, including ADA4891-3ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4891-3ARZ requirements.

6.How does Aetrix verify that ADA4891-3ARZ is sourced from the original manufacturer or authorized distributors?

All ADA4891-3ARZ 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 ADA4891-3ARZ meets industry standards.

7.What is the process for return or replacement of ADA4891-3ARZ?

All ADA4891-3ARZ units undergo pre-shipment inspection (PSI). If there is an issue with ADA4891-3ARZ, 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 ADA4891-3ARZ part is unused and in its original packaging.

Return procedure for ADA4891-3ARZ:

1.Submit a request within 90 days.

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

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