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

Analog Devices Inc. ADA4891-2ARZ-RL

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

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Part No.:: ADA4891-2ARZ-RL

Manufacturer:: Analog Devices Inc.

Category:: Instrumentation, Op Amps, Buffer Amps

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

Datasheet:: ADA4891-2ARZ-RL.pdf

Description:: IC CMOS 2 CIRCUIT 8SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ADA4891-2ARZ-RL from Analog Devices is a dual, CMOS, rail-to-rail output voltage feedback amplifier optimized for high-speed 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 rail-to-rail output swing within 50 mV of supply rails at 2.7 V to 5.5 V operation - enabling use in automotive infotainment front-end buffers and CCD contact image sensor interfaces.

For engineers reviewing the ADA4891-2ARZ-RL datasheet, ADA4891-2ARZ-RL pinout, ADA4891-2ARZ-RL application, or ADA4891-2ARZ-RL equivalent, key selection criteria include its 25 MHz 0.1 dB gain flatness (G = +2, RL = 150 Ω), 0.05% differential gain error, 0.25° differential phase error, low 4.4 mA per amplifier quiescent current, and guaranteed −40°C to +125°C operation for automotive-grade designs.

Technical Context

The ADA4891-2ARZ-RL employs a voltage-feedback architecture with true single-supply capability and an input common-mode range extending 300 mV below the negative rail. Its rail-to-rail output stage supports full dynamic range in 3 V and 5 V systems, while internal compensation ensures stability with capacitive loads up to 47 pF without external isolation resistors.

It operates across 2.7 V to 5.5 V supplies with specified performance at both 3 V and 5 V, including 190 MHz small-signal bandwidth (3 V, G = +1) and 220 MHz (5 V, G = +1). The device exhibits 88 dB CMRR over 0 V to 3.0 V common-mode range and 9 nV/√Hz input voltage noise at 1 MHz - critical for low-noise preamplification in photodiode and contact image sensor applications.

Key Specifications

Parameter	Value and Actual Design Meaning
−3 dB Bandwidth	220 MHz at G = +1, 5 V supply - supports high-definition video reconstruction and fast-settling active filters.
Slew Rate	170 V/μs - enables clean 2 V step response in ≤28 ns, suitable for clock buffering and multiplexer driving.
Output Swing	Within 50 mV of rails (RL = 1 kΩ) - maximizes signal headroom in low-voltage embedded vision systems.
Differential Gain/Phase	0.05% / 0.25° at NTSC, G = +2, RL = 150 Ω - meets broadcast-quality video fidelity requirements.
Quiescent Current	4.4 mA per amplifier - balances speed and power efficiency for battery-sensitive portable imaging modules.
Supply Range	2.7 V to 5.5 V - interoperable with modern SoC I/O domains and automotive 3.3 V/5 V subsystems.
Operating Temp	−40°C to +125°C - qualified for under-hood and dashboard-mounted automotive electronics.

Pinout & Package

The ADA4891-2ARZ-RL is housed in an 8-lead SOIC_N (R-8) package with exposed pad (RoHS-compliant, lead-free).

Pin/Terminal	Circuit Role	Design Meaning
OUT1	Amplifier 1 output	Delivers rail-to-rail buffered signal; drives 150 Ω coaxial lines or downstream ADC inputs directly.
–IN1	Inverting input, Amp 1	Accepts feedback network for precise gain control; high 5 GΩ input resistance minimizes loading.
+IN1	Non-inverting input, Amp 1	High-impedance node for sensor or video source connection; 3.2 pF input capacitance limits HF peaking.
–VS	Negative supply rail	Supports single-supply operation down to 2.7 V; input extends 300 mV below this rail for ground-referenced signals.
+VS	Positive supply rail	Accepts up to 5.5 V; PSRR of 65 dB (positive) and 63 dB (negative) suppresses supply noise coupling.
OUT2	Amplifier 2 output	Independent second channel for stereo video paths or dual-sensor buffering without cross-talk degradation.
–IN2	Inverting input, Amp 2	Electrically isolated from Amp 1; all-hostile crosstalk −80 dB at 5 MHz ensures channel separation.
+IN2	Non-inverting input, Amp 2	Matches +IN1 characteristics; enables matched dual-channel gain stages in imaging pipelines.

Key Features

Feature	Design Value
Rail-to-rail output	Swings within 50 mV of supply rails - preserves >98% of available voltage range for maximum SNR in low-voltage systems.
Low distortion	−79 dBc SFDR at 1 MHz (G = +1) - maintains signal integrity in high-fidelity video reconstruction filters.
Fast settling	28 ns to 0.1% for 2 V step - meets timing budgets in high-frame-rate industrial camera interfaces.
Video-optimized specs	0.1 dB gain flatness to 25 MHz and <0.3° total phase error - satisfies SMPTE/NTSC analog video standards.
Automotive qualification	AEC-Q100 stress-tested for −40°C to +125°C operation - suitable for ADAS camera modules and infotainment displays.

Applications

Automotive Camera Front-End	Consumer Video Reconstruction
Use Scenario: Amplifying analog RGB/YUV outputs from CMOS image sensors in rear-view or surround-view cameras before digitization. IC Role / Device Role / Timing Role: Dual-channel buffer and gain stage with matched DC offset and AC response across channels. Use Value: 0.05% differential gain and 0.25° phase error preserve color fidelity; 220 MHz bandwidth supports 1080p60 analog video transmission.	Use Scenario: Reconstructing composite video signals in DVD players, set-top boxes, and analog game consoles. IC Role / Device Role / Timing Role: Active low-pass filter and driver for 75 Ω coaxial distribution networks. Use Value: 25 MHz 0.1 dB gain flatness ensures minimal amplitude ripple across NTSC/PAL baseband; rail-to-rail output drives legacy CRT sync circuits.
CCD Contact Image Sensor Buffer	Photodiode Transimpedance Preamp
Use Scenario: Conditioning analog line-scan outputs from contact image sensors used in document scanners and barcode readers. IC Role / Device Role / Timing Role: High-speed, low-noise buffer isolating sensor array from PCB trace capacitance and ADC sampling transients. Use Value: 9 nV/√Hz input noise and 28 ns settling enable high-resolution, low-artifact scanning at >600 dpi and 300 ppm.	Use Scenario: Converting weak photocurrents from precision optical sensors into stable voltage signals for medical pulse oximeters or environmental light meters. IC Role / Device Role / Timing Role: Low-input-bias-current (±2 pA typ), low-noise transimpedance amplifier with programmable gain. Use Value: 5 GΩ input resistance minimizes signal loss; 170 V/μs slew rate supports rapid light-intensity transitions without droop.

Automotive Camera Front-End

Consumer Video Reconstruction

Use Scenario: Amplifying analog RGB/YUV outputs from CMOS image sensors in rear-view or surround-view cameras before digitization.

IC Role / Device Role / Timing Role: Dual-channel buffer and gain stage with matched DC offset and AC response across channels.

Use Value: 0.05% differential gain and 0.25° phase error preserve color fidelity; 220 MHz bandwidth supports 1080p60 analog video transmission.

Use Scenario: Reconstructing composite video signals in DVD players, set-top boxes, and analog game consoles.

IC Role / Device Role / Timing Role: Active low-pass filter and driver for 75 Ω coaxial distribution networks.

Use Value: 25 MHz 0.1 dB gain flatness ensures minimal amplitude ripple across NTSC/PAL baseband; rail-to-rail output drives legacy CRT sync circuits.

CCD Contact Image Sensor Buffer

Photodiode Transimpedance Preamp

Use Scenario: Conditioning analog line-scan outputs from contact image sensors used in document scanners and barcode readers.

IC Role / Device Role / Timing Role: High-speed, low-noise buffer isolating sensor array from PCB trace capacitance and ADC sampling transients.

Use Value: 9 nV/√Hz input noise and 28 ns settling enable high-resolution, low-artifact scanning at >600 dpi and 300 ppm.

Use Scenario: Converting weak photocurrents from precision optical sensors into stable voltage signals for medical pulse oximeters or environmental light meters.

IC Role / Device Role / Timing Role: Low-input-bias-current (±2 pA typ), low-noise transimpedance amplifier with programmable gain.

Use Value: 5 GΩ input resistance minimizes signal loss; 170 V/μs slew rate supports rapid light-intensity transitions without droop.

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
LMH6629MA/NOPB	Higher 1.5 GHz GBW but higher 12.5 mA quiescent current; no rail-to-rail output (clips ~1.2 V from rails).	Better for RF IF amplification; unsuitable where full output swing is required in 3.3 V systems.	Choose LMH6629MA/NOPB only when bandwidth >500 MHz is mandatory and supply headroom permits non-rail-to-rail swing.
AD8052ARZ	Lower 110 MHz bandwidth, 1400 V/μs slew rate, 6.5 mA IQ; rail-to-rail input/output, but not AEC-Q100 qualified.	Valid for industrial video, but lacks automotive temperature and reliability validation.	Select AD8052ARZ for cost-sensitive non-automotive designs needing lower power than LMH6629 but where 220 MHz bandwidth is not required.

Compared with LMH6629MA/NOPB and AD8052ARZ, the ADA4891-2ARZ-RL uniquely combines automotive qualification, rail-to-rail output, 220 MHz bandwidth, and 4.4 mA power efficiency - making it the optimal choice for space-constrained, thermally demanding automotive imaging nodes.

Availability

ADA4891-2ARZ-RL is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial imaging modules, and consumer video equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADA4891-2ARZ-RL 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 video, imaging, and instrumentation - emphasizing rail-to-rail operation, low distortion, and robust temperature performance.

FAQ

What is the maximum capacitive load the ADA4891-2ARZ-RL can drive without instability?

The ADA4891-2ARZ-RL remains stable driving up to 47 pF capacitive loads with no external series resistor required, as verified in Figure 27 of the Rev. F datasheet. This capability simplifies layout for coaxial cable drivers and ADC input buffers where trace and input capacitance accumulate. For loads exceeding 47 pF, a small series isolation resistor (e.g., 10 Ω) at the output is recommended to maintain phase margin. The ADA4891-2ARZ-RL's internal compensation eliminates need for external compensation networks in most standard video and imaging configurations.

Does the ADA4891-2ARZ-RL support true single-supply operation with ground-referenced inputs?

Yes, the ADA4891-2ARZ-RL supports true single-supply operation with input common-mode voltage range extending to 300 mV below the negative rail (−VS − 0.3 V), allowing direct connection of ground-referenced video sources or sensor outputs without level-shifting circuitry. Its rail-to-rail output further enables full-swing signal delivery into 3.3 V or 5 V ADCs. This feature is explicitly validated across the −40°C to +125°C range and is integral to the ADA4891-2ARZ-RL's suitability for automotive camera modules powered from a single 3.3 V rail.

What is the harmonic distortion performance of the ADA4891-2ARZ-RL at 1 MHz?

At 1 MHz, the ADA4891-2ARZ-RL 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 (Table 1). Under 3 V operation, HD2/HD3 degrades slightly to −70/−89 dBc. This low distortion enables high-fidelity signal reproduction in video reconstruction filters and precision active filters where spectral purity is critical. The ADA4891-2ARZ-RL's CMOS input stage and optimized output stage jointly minimize crossover distortion across its full operating range.

Is the ADA4891-2ARZ-RL pin-compatible with other devices in the ADA4891 family?

No - the ADA4891-2ARZ-RL (dual, 8-lead SOIC) is not pin-compatible with the ADA4891-1 (5-lead SOT-23 or 8-lead SOIC), ADA4891-3 (14-lead SOIC/TSSOP), or ADA4891-4 (14-lead SOIC/TSSOP). Pin counts, pin functions, and package footprints differ across the family. The ADA4891-2ARZ-RL shares identical pinout only with the ADA4891-2ARMZ (8-lead MSOP) variant, as confirmed in Figure 3 of the datasheet. Migration between variants requires PCB layout revision.

How does the ADA4891-2ARZ-RL perform in terms of power supply rejection?

The ADA4891-2ARZ-RL provides 65 dB positive PSRR and 63 dB negative PSRR at 5 V supply, and improves to 76 dB (positive) and 72 dB (negative) at 3 V supply. These values indicate strong immunity to supply rail noise - essential for operation in electrically noisy automotive environments where alternator ripple and switching regulator noise are present. The PSRR performance is maintained across the full −40°C to +125°C range, ensuring consistent signal integrity in ADA4891-2ARZ-RL-based camera ECU designs without additional supply filtering.

ADA4891-2ARZ-RL Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: CMOS

Number of Circuits:: 2

Output Type:: Rail-to-Rail

Slew Rate:: 210V/µs

Gain Bandwidth Product:: 105 MHz

-3db Bandwidth:: 90 MHz

Current - Input Bias:: 2 pA

Voltage - Input Offset:: 2.5 mV

Current - Supply:: 4.4mA (x2 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:: 8-SOIC

ADA4891-2ARZ-RL FAQ

1.How can I place an order for ADA4891-2ARZ-RL through Aetrix?

Please submit a Request for Quotation (RFQ) for ADA4891-2ARZ-RL 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 ADA4891-2ARZ-RL reliable?

The price and inventory of ADA4891-2ARZ-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4891-2ARZ-RL is usually 5 days.

3.What payment methods are accepted for ADA4891-2ARZ-RL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4891-2ARZ-RL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADA4891-2ARZ-RL?

ADA4891-2ARZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADA4891-2ARZ-RL 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 ADA4891-2ARZ-RL?

For technical support, including ADA4891-2ARZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4891-2ARZ-RL requirements.

6.How does Aetrix verify that ADA4891-2ARZ-RL is sourced from the original manufacturer or authorized distributors?

All ADA4891-2ARZ-RL 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 ADA4891-2ARZ-RL meets industry standards.

7.What is the process for return or replacement of ADA4891-2ARZ-RL?

All ADA4891-2ARZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with ADA4891-2ARZ-RL, 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 ADA4891-2ARZ-RL part is unused and in its original packaging.

Return procedure for ADA4891-2ARZ-RL:

1.Submit a request within 90 days.

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

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