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Analog Devices Inc. ADA4891-1ARZ-R7
- Part No.:
- ADA4891-1ARZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADA4891-1ARZ-R7.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,218
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Product details
Overview
ADA4891-1ARZ-R7 from Analog Devices is a single-channel, CMOS, rail-to-rail output operational 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 0.05% differential gain error at 25 MHz - enabling precision NTSC video reconstruction in automotive infotainment and contact image sensor buffers.
For engineers reviewing the ADA4891-1ARZ-R7 datasheet, ADA4891-1ARZ-R7 pinout, ADA4891-1ARZ-R7 application, or ADA4891-1ARZ-R7 equivalent, key selection criteria include its 2.7 V to 5.5 V single-supply operation, 50 mV rail-to-rail output swing, 79 dBc SFDR at 1 MHz, and SOIC-8 package compatibility with space-constrained video front-ends and active filter designs.
Technical Context
The ADA4891-1ARZ-R7 employs a fully complementary CMOS input stage with 5 GΩ input resistance and 3.2 pF input capacitance, supporting true single-supply operation down to 2.7 V while maintaining input common-mode range extending 300 mV below the negative rail. Its unity-gain-stable architecture enables wideband noninverting and inverting configurations without external compensation.
Designed for low-distortion signal paths, it achieves −79 dBc second-harmonic distortion at 1 MHz (G = +1) and maintains 0.1 dB gain flatness up to 25 MHz into 150 Ω loads - meeting broadcast-grade video timing and amplitude fidelity requirements in coaxial cable drivers and CCD buffer stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 220 MHz at G = +1 - supports full HD video baseband and fast-settling active filters. |
| Slew Rate | 170 V/μs - ensures minimal distortion on 2 V step signals with <30 ns rise time. |
| Settling Time | 28 ns to 0.1% - meets tight timing budgets in multiplexed imaging pipelines. |
| Rail-to-Rail Output | Swings within 50 mV of rails - maximizes dynamic range in 3.3 V or 5 V systems. |
| Supply Range | 2.7 V to 5.5 V - enables direct interface with modern low-voltage SoCs and FPGAs. |
| Quiescent Current | 4.4 mA per amplifier - balances speed and power efficiency in always-on video modules. |
| Differential Gain Error | 0.05% at NTSC frequencies - preserves color fidelity without external calibration. |
Pinout & Package
ADA4891-1ARZ-R7 is packaged in an 8-lead SOIC_N (R-8) outline, pin-compatible with industry-standard SOIC-8 footprints and rated for −40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 NC | No Connect | Unused pad; must remain unconnected to avoid parasitic coupling. |
| 2 −IN | Inverting Input | High-impedance node (5 GΩ) for feedback network connection in inverting configurations. |
| 3 +IN | Noninverting Input | CMOS input with −VS − 0.3 V to +VS − 0.8 V common-mode range. |
| 4 −VS | Negative Supply Rail | Accepts ground or negative voltage; supports single- or dual-supply operation. |
| 5 NC | No Connect | Unused pad; electrically isolated per datasheet Figure 1. |
| 6 OUT | Amplifier Output | Capable of sourcing/sinking 125 mA; drives 150 Ω video loads directly. |
| 7 +VS | Positive Supply Rail | Supplies 2.7–5.5 V; PSRR >65 dB minimizes supply noise injection. |
| 8 NC | No Connect | Unused pad; no internal connection; leave floating or grounded per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Enables full utilization of 3.3 V or 5 V supply headroom in video DAC buffers and ADC drivers. |
| 25 MHz 0.1 dB gain flatness | Preserves amplitude integrity across NTSC/PAL luminance and chrominance bands without equalization. |
| Low 9 nV/√Hz input voltage noise | Maintains SNR >70 dB in photodiode preamp and low-level analog sensor interfaces. |
| 125 mA linear output current | Drives 150 Ω coaxial cables and multiple parallel loads without external buffers. |
| −40°C to +125°C operation | Qualified for under-hood automotive applications including driver assistance camera modules. |
Applications
| Automotive Camera Signal Chain | Consumer Video Reconstruction |
|---|---|
Use Scenario: Front-facing ADAS camera module digitizing analog RGB or YUV video before FPGA processing. IC Role / Device Role / Timing Role: Buffering and level-shifting analog video output from image sensor to ADC input with minimal group delay. Use Value: 0.05% differential gain and 0.25° phase error ensure accurate color reproduction without post-processing correction. | Use Scenario: HDMI-to-analog converter output stage driving legacy CRT or composite monitors. IC Role / Device Role / Timing Role: Active reconstruction filter and impedance-matched line driver for 150 Ω coaxial video distribution. Use Value: 220 MHz bandwidth and 25 MHz 0.1 dB flatness maintain sharp edge transitions and chroma resolution in SD/HD video. |
| Contact Image Sensor Buffer | Active Filter Stage |
Use Scenario: High-speed document scanner using linear CIS array with 10+ kSPS pixel readout. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate buffer isolating CIS output from PCB trace capacitance and ADC sampling kickback. Use Value: 9 nV/√Hz input noise and 28 ns settling preserve optical density accuracy across grayscale intensity levels. | Use Scenario: 4th-order Butterworth anti-aliasing filter preceding sigma-delta ADC in industrial data acquisition. IC Role / Device Role / Timing Role: Unity-gain stable, low-distortion op-amp implementing high-Q filter poles with minimal phase shift. Use Value: −79 dBc SFDR at 1 MHz ensures harmonic content remains below quantization noise floor of 24-bit converters. |
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 12.5 mA quiescent current; no rail-to-rail output (clips ~1.2 V from rails). | Better for RF IF amplification; unsuitable for low-voltage video swing preservation. | Select only when bandwidth >500 MHz is required and supply headroom >1.5 V is available. |
| AD8057ARTZ-R7 | Lower 325 MHz −3 dB bandwidth (G = +1); 150 V/μs slew rate; 3.5 mA IQ; same SOIC-8 package. | Valid for less demanding video or general-purpose high-speed buffering where 220 MHz is marginal. | Choose when cost sensitivity outweighs need for 28 ns settling or 0.05% differential gain performance. |
Compared with LMH6629MA/NOPB and AD8057ARTZ-R7, ADA4891-1ARZ-R7 uniquely combines rail-to-rail output, sub-30 ns settling, and NTSC-qualified video specs in a 4.4 mA, SOIC-8 package - making it the optimal choice for automotive and consumer video signal chains operating at 3.3 V or 5 V.
Availability
ADA4891-1ARZ-R7 is available at Aetrix Electronics and suitable for automotive infotainment systems, contact image sensor buffers, and active filter designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADA4891-1ARZ-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.
The ADA4891 family was engineered specifically for cost-sensitive, high-speed analog signal conditioning in imaging and video systems - delivering automotive-qualified reliability without sacrificing bandwidth, linearity, or power efficiency.
FAQ
What is the maximum operating temperature for ADA4891-1ARZ-R7?
The ADA4891-1ARZ-R7 is specified for continuous operation from −40°C to +125°C, meeting AEC-Q100 Grade 1 requirements for automotive under-hood environments. This rating applies to the SOIC-8 package variant and is validated across all electrical parameters in the datasheet's 5 V and 3 V operation tables.
Does ADA4891-1ARZ-R7 support dual-supply operation?
Yes, ADA4891-1ARZ-R7 supports dual-supply operation with ±2.5 V typical configuration. Its input common-mode range extends to −VS − 0.3 V, and output swings to within 50 mV of both rails - enabling symmetric signal handling in precision instrumentation and legacy analog systems requiring bipolar supplies.
Can ADA4891-1ARZ-R7 drive a 150 Ω coaxial cable directly?
Yes, ADA4891-1ARZ-R7 delivers 125 mA linear output current and is characterized for 0.05% differential gain error driving 150 Ω loads at 25 MHz. Its 220 MHz bandwidth and 25 MHz 0.1 dB gain flatness make it suitable for direct 150 Ω video line driving without external buffers or termination networks.
What is the input bias current specification for ADA4891-1ARZ-R7?
The input bias current for ADA4891-1ARZ-R7 is ±2 pA typical, with limits of −50 pA to +50 pA over temperature. This ultra-low bias current stems from its CMOS input stage and enables high-impedance sensor interfacing - such as photodiode preamplifiers - without significant DC offset drift.
Is ADA4891-1ARZ-R7 pin-compatible with other members of the ADA4891 family?
No - ADA4891-1ARZ-R7 (single, SOIC-8) is not pin-compatible with ADA4891-2 (dual, SOIC-8 or MSOP-8), ADA4891-3 (triple, SOIC-14/TSSOP-14), or ADA4891-4 (quad, SOIC-14/TSSOP-14). Each variant has distinct pinouts; only the ADA4891-1ARZ-R7 matches the SOIC-8 connection diagram in Figure 1 of the Rev. F datasheet.
ADA4891-1ARZ-R7 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:
- 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-R7 FAQ
1.How can I place an order for ADA4891-1ARZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4891-1ARZ-R7 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-R7 reliable?
The price and inventory of ADA4891-1ARZ-R7 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-R7 is usually 5 days.
3.What payment methods are accepted for ADA4891-1ARZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4891-1ARZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4891-1ARZ-R7?
ADA4891-1ARZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4891-1ARZ-R7 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-R7?
For technical support, including ADA4891-1ARZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4891-1ARZ-R7 requirements.
6.How does Aetrix verify that ADA4891-1ARZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADA4891-1ARZ-R7 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-R7 meets industry standards.
7.What is the process for return or replacement of ADA4891-1ARZ-R7?
All ADA4891-1ARZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADA4891-1ARZ-R7, 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-R7 part is unused and in its original packaging.
Return procedure for ADA4891-1ARZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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