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Analog Devices Inc. ADA4891-2ARMZ-R7
- Part No.:
- ADA4891-2ARMZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADA4891-2ARMZ-R7.pdf
- Description:
- IC CMOS 2 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,056
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Product details
Overview
ADA4891-2ARMZ-R7 from Analog Devices is a dual, 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 - enabling precision NTSC video reconstruction in automotive infotainment and contact image sensor buffers.
For engineers reviewing the ADA4891-2ARMZ-R7 datasheet, ADA4891-2ARMZ-R7 pinout, ADA4891-2ARMZ-R7 application, or ADA4891-2ARMZ-R7 equivalent, key selection criteria include its 2.7 V to 5.5 V single-supply operation, 50 mV rail-to-rail output swing, 125 mA linear output current, and guaranteed −40°C to +125°C operation for automotive-grade designs.
Technical Context
The ADA4891-2ARMZ-R7 employs a voltage-feedback architecture with true single-supply input stage extending 300 mV below the negative rail and rail-to-rail output capable of swinging within 50 mV of both supply rails. Its CMOS input provides 5 GΩ input resistance and low 3.2 pF input capacitance, minimizing loading on high-impedance sources like photodiodes and CCDs.
It operates across 2.7 V–5.5 V supplies with 4.4 mA per amplifier quiescent current, delivering 79 dBc SFDR at 1 MHz and −80 dB all-hostile crosstalk at 5 MHz - critical for multi-channel imaging and coaxial cable driver applications where channel isolation and harmonic suppression are essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| −3 dB Bandwidth | 220 MHz at G = +1 (enables wideband video and filter applications up to ~175 MHz usable signal bandwidth) |
| Slew Rate | 170 V/μs (supports clean 2 V step response in ≤28 ns, suitable for fast-settling active filters) |
| Settling Time | 28 ns to 0.1% (ensures accurate pulse fidelity in digital imaging pipelines and multiplexer buffering) |
| Differential Gain Error | 0.05% at G = +2, RL = 150 Ω (meets broadcast-grade NTSC video linearity requirements) |
| Rail-to-Rail Output | Swings to within 50 mV of both rails (maximizes dynamic range in 3.3 V or 5 V systems without level-shifting) |
| Supply Range | 2.7 V to 5.5 V (supports direct interface with modern low-voltage SoCs and FPGAs) |
| Quiescent Current | 4.4 mA per amplifier (balances speed and power for battery-aware or thermally constrained designs) |
Pinout & Package
ADA4891-2ARMZ-R7 is housed in an 8-lead MSOP (RM-8) package with exposed pad for thermal enhancement. Pin 1 is OUT1; pin 2 is –IN1; pin 3 is +IN1; pin 4 is –VS; pin 5 is +IN2; pin 6 is –IN2; pin 7 is OUT2; pin 8 is +VS. No pins are internally connected or unused.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 | Output of Amplifier 1 | Delivers rail-to-rail buffered signal; drives 150 Ω video loads or 1 kΩ high-Z ADC inputs |
| –IN1 | Inverting Input of Amp 1 | Accepts feedback network; supports inverting gain configurations with stable phase margin |
| +IN1 | Noninverting Input of Amp 1 | High-impedance node (5 GΩ); interfaces directly with photodiode or sensor outputs |
| –VS | Negative Supply Rail | Reference for dual-supply operation; accepts ground or negative voltage down to −0.5 V |
| +IN2 | Noninverting Input of Amp 2 | Independent high-Z input; enables dual-channel parallel processing without crosstalk degradation |
| –IN2 | Inverting Input of Amp 2 | Separate feedback path; allows independent gain setting per channel |
| OUT2 | Output of Amplifier 2 | Matched performance to OUT1; supports stereo video, dual-sensor buffering, or redundancy |
| +VS | Positive Supply Rail | Accepts 2.7–5.5 V; PSRR of 65 dB ensures immunity to digital supply noise |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Enables full utilization of 3.3 V or 5 V ADC input ranges without external level-shifting circuitry |
| 28 ns 0.1% settling time | Supports >35 MSPS sampling in imaging front-ends and real-time video reconstruction filters |
| 0.05% differential gain error | Meets ITU-R BT.470 and EIA-770.1 NTSC standards for broadcast-quality analog video transmission |
| 125 mA linear output current | Drives 150 Ω coaxial cables directly without external buffer stages, reducing BOM count |
| −40°C to +125°C operation | Qualified for under-hood automotive applications including ADAS camera modules and head-unit displays |
Applications
| Automotive Camera Signal Conditioning | Consumer Video Reconstruction Filter |
|---|---|
Use Scenario: Front/rear-view camera module output amplification before analog-to-digital conversion in automotive infotainment head units. IC Role / Device Role / Timing Role: Dual-channel video driver with matched gain and phase response across channels for stereo vision alignment. Use Value: 0.05% differential gain and 0.25° phase error preserve color fidelity over temperature; 220 MHz bandwidth supports HD-resolution pixel clocks. | Use Scenario: Reconstructing composite NTSC/PAL video signals after DAC output in set-top boxes and DVD players. IC Role / Device Role / Timing Role: Active low-pass reconstruction filter with precise 25 MHz 0.1 dB gain flatness. Use Value: 25 MHz flat bandwidth and 79 dBc SFDR suppress harmonics that cause visible dot crawl and cross-color artifacts. |
| Contact Image Sensor (CIS) Buffer | Coaxial Cable Driver for Security Cameras |
Use Scenario: Buffering high-impedance analog outputs from linear CIS arrays used in document scanners and barcode readers. IC Role / Device Role / Timing Role: High-input-impedance (5 GΩ), low-capacitance (3.2 pF) follower preserving signal integrity from millivolt-level sensor pixels. Use Value: 9 nV/√Hz input voltage noise minimizes added noise floor; rail-to-rail output maximizes SNR into 12-bit ADCs. | Use Scenario: Driving long RG-59 coaxial cables from DVR outputs to remote analog security cameras. IC Role / Device Role / Timing Role: 150 Ω line driver with 125 mA sourcing/sinking capability and 40 MHz large-signal bandwidth. Use Value: Sustains 2 V p-p signal over 300 ft cable with <0.1 dB loss at 5 MHz; eliminates need for discrete emitter-follower stages. |
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 |
|---|---|---|---|
| ADA4891-2ARMZ | Same die and specs; differs only in tape-and-reel packaging (R7 = 1k reel, standard ARMZ = cut tape) | No functional difference; identical electrical and thermal behavior in PCB layout | Select ADA4891-2ARMZ-R7 for automated SMT assembly; ADA4891-2ARMZ for prototyping or low-volume hand placement |
| 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 gain stages; unsuitable for 3.3 V video reconstruction requiring full swing | Choose LMH6629MA/NOPB only when bandwidth >500 MHz is required and rail-to-rail output is not needed |
Compared with ADA4891-2ARMZ and LMH6629MA/NOPB, the ADA4891-2ARMZ-R7 uniquely balances 220 MHz bandwidth, rail-to-rail output, 4.4 mA power, and automotive temperature rating - making it optimal for cost-sensitive, space-constrained video signal chains where dynamic range and thermal robustness are non-negotiable.
Availability
ADA4891-2ARMZ-R7 is available at Aetrix Electronics and suitable for automotive infotainment systems, imaging front-ends, and consumer video equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ADA4891-2ARMZ-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 Wilmington, MA.
The ADA4891 family was designed specifically for cost-sensitive, high-speed analog signal conditioning in automotive video, imaging, and communications - emphasizing rail-to-rail operation, low distortion, and extended temperature reliability without sacrificing bandwidth.
FAQ
What is the maximum operating temperature for ADA4891-2ARMZ-R7?
The ADA4891-2ARMZ-R7 is specified for continuous operation from −40°C to +125°C, meeting AEC-Q100 Grade 1 requirements for automotive under-hood applications. This rating is validated across all electrical parameters in the datasheet, including bandwidth, slew rate, and distortion performance, ensuring reliable function in engine control units and camera modules.
Does ADA4891-2ARMZ-R7 support single-supply operation?
Yes, ADA4891-2ARMZ-R7 fully supports true single-supply operation from 2.7 V to 5.5 V. Its input common-mode range extends 300 mV below the negative rail (e.g., to −0.3 V when VS− = 0 V), and its output swings to within 50 mV of both rails - enabling direct interfacing with 3.3 V or 5 V microcontrollers and ADCs without level-shifting components.
What is the small-signal bandwidth of ADA4891-2ARMZ-R7 at G = +2?
At G = +2 with RL = 150 Ω and VS = 5 V, the ADA4891-2ARMZ-R7 delivers 90 MHz −3 dB small-signal bandwidth. This is confirmed in Table 1 of the Rev. F datasheet and enables use in HD video drivers (720p/1080i) and active filters targeting baseband frequencies up to ~70 MHz.
Can ADA4891-2ARMZ-R7 drive a 150 Ω coaxial cable load?
Yes, ADA4891-2ARMZ-R7 is explicitly characterized for 150 Ω loads: it delivers 2 V p-p output with 0.05% differential gain error and 25 MHz 0.1 dB gain flatness at G = +2. Its 125 mA linear output current and 40 MHz large-signal bandwidth ensure stable driving of standard RG-59 coax without peaking or overshoot.
Is ADA4891-2ARMZ-R7 pin-compatible with other members of the ADA4891 family?
No - ADA4891-2ARMZ-R7 (dual, 8-pin MSOP) is not pin-compatible with ADA4891-1 (5-pin SOT-23 or 8-pin SOIC), ADA4891-3 (14-pin SOIC/TSSOP), or ADA4891-4 (14-pin SOIC/TSSOP). Each variant has distinct pin counts, layouts, and terminal assignments; PCB redesign is required when substituting between family members.
ADA4891-2ARMZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-MSOP
ADA4891-2ARMZ-R7 FAQ
1.How can I place an order for ADA4891-2ARMZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADA4891-2ARMZ-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 ADA4891-2ARMZ-R7 reliable?
The price and inventory of ADA4891-2ARMZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADA4891-2ARMZ-R7 is usually 5 days.
3.What payment methods are accepted for ADA4891-2ARMZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADA4891-2ARMZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADA4891-2ARMZ-R7?
ADA4891-2ARMZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADA4891-2ARMZ-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 ADA4891-2ARMZ-R7?
For technical support, including ADA4891-2ARMZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADA4891-2ARMZ-R7 requirements.
6.How does Aetrix verify that ADA4891-2ARMZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADA4891-2ARMZ-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 ADA4891-2ARMZ-R7 meets industry standards.
7.What is the process for return or replacement of ADA4891-2ARMZ-R7?
All ADA4891-2ARMZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADA4891-2ARMZ-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 ADA4891-2ARMZ-R7 part is unused and in its original packaging.
Return procedure for ADA4891-2ARMZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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