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Analog Devices Inc. AD812ARZ-REEL
- Part No.:
- AD812ARZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Video Amps and Modules
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD812ARZ-REEL.pdf
- Description:
- IC AMP CURRENT FEEDBACK 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
AD812ARZ-REEL from Analog Devices is a dual, current-feedback, low-power video operational amplifier in an 8-lead SOIC package. It delivers 50 mA output current per channel, 145 MHz unity-gain bandwidth (±15 V), 0.02% differential gain error, and 0.028° differential phase error into 150 Ω - optimized for professional video line driving in cameras and switchers.
For engineers reviewing the AD812ARZ-REEL datasheet, AD812ARZ-REEL pinout, AD812ARZ-REEL application, or AD812ARZ-REEL equivalent, key selection criteria include single-supply operation down to +3 V, rail-to-rail output swing (1 V from rails), matched gain flatness (0.1 dB to 40 MHz), and crosstalk < –75 dB at 5 MHz - all critical for multi-channel HD video signal integrity.
Technical Context
The AD812ARZ-REEL implements a current-feedback architecture with separate high-impedance noninverting (+IN) and low-impedance inverting (–IN) inputs (65 Ω typical), enabling wide bandwidth independent of closed-loop gain when using appropriate feedback resistors. Its transimpedance open-loop response supports stable operation at gains ≥ +1 with metal-film RF/RG networks.
Each amplifier features matched dynamic performance: 0.1 dB gain flatness to 40 MHz (±15 V), ≤ 0.1 dB gain flatness match between channels at 40 MHz, and differential gain/phase errors specified under NTSC conditions with RL = 150 Ω - confirming suitability for broadcast-grade analog video routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (–3 dB) | 145 MHz at G = +1, ±15 V - enables full HD (1080p60) baseband video amplification without attenuation. |
| Slew Rate | 1600 V/µs at ±15 V - supports fast transient response for composite sync pulses and digital video transitions. |
| Differential Gain Error | 0.02% max at ±15 V, G = +2, RL = 150 Ω - preserves color fidelity in professional camera outputs. |
| Differential Phase Error | 0.028° max at ±15 V, G = +2, RL = 150 Ω - maintains timing accuracy between luminance/chrominance components. |
| Output Current | 50 mA per amplifier - drives one back-terminated 75 Ω video cable (150 Ω load) with headroom for cable loss compensation. |
| Supply Range | +2.4 V to +36 V single supply or ±1.2 V to ±18 V dual supply - supports portable battery-powered and industrial rack-mounted designs. |
| Quiescent Current | 4.0 mA per amplifier max at ±5 V - enables dual-channel video buffering in power-constrained embedded systems. |
| Crosstalk | –75 dB at 5 MHz - prevents inter-channel interference in dual-video-path applications like picture-in-picture or stereo vision processing. |
Pinout & Package
AD812ARZ-REEL is housed in an 8-lead SOIC (SO-8) package with standard JEDEC MS-012AC outline, 1.27 mm pitch, and gull-wing leads. Thermal resistance θJA = 150°C/W enables operation up to +85°C ambient with minimal heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Amplifier 1 output | Delivers buffered video signal; capable of ±3.8 V swing into 150 Ω with 50 mA drive capability. |
| 2 (–IN1) | Amplifier 1 inverting input | Low-impedance node (65 Ω); connects to feedback network for precise gain control in current-feedback topology. |
| 3 (+IN1) | Amplifier 1 noninverting input | High-impedance node (15 MΩ); accepts source signal with minimal loading in video line receiver configurations. |
| 4 (V+) | Positive supply | Accepts single +3 V to +36 V or dual ±1.2 V to ±18 V; bypassing with 0.1 µF + 1 µF capacitors required for stability. |
| 5 (OUT2) | Amplifier 2 output | Independent second channel output; matched performance enables synchronous dual-video-path processing. |
| 6 (–IN2) | Amplifier 2 inverting input | Electrically isolated from Pin 2; layout separation minimizes crosstalk below –75 dB at 5 MHz. |
| 7 (+IN2) | Amplifier 2 noninverting input | Independent high-Z input; supports dual-input video switching or stereo analog signal conditioning. |
| 8 (V–) | Negative supply / ground | Reference for dual supply (±V) or ground return for single-supply operation; requires low-inductance connection to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel integration | Two matched video op amps in one SOIC-8 package reduces PCB area by >40% vs. discrete solutions while maintaining channel isolation. |
| Current-feedback architecture | Enables constant bandwidth across gains ≥ +1 via RF selection (e.g., 715 Ω for G = +2), eliminating gain-bandwidth trade-off of voltage-feedback op amps. |
| Video-optimized distortion performance | –90 dBc THD at 1 MHz ensures minimal harmonic generation in composite video signals, preserving signal-to-noise ratio in analog transmission paths. |
| Rail-to-rail output swing | Swings to within 1 V of either supply rail into 150 Ω - accommodates 1 Vp-p video signals on +3 V or +5 V supplies without level-shifting circuitry. |
| Input common-mode range | Extends to 1.0–4.0 V on +5 V supply and 1.0–2.0 V on +3 V supply - supports DC-coupled video interfaces with minimal offset adjustment. |
| ESD protection | Rated for 4000 V HBM - withstands handling during automated assembly and field service without external clamping diodes. |
Applications
| Video Line Driver | Professional Camera Signal Chain |
|---|---|
Use Scenario: Driving 75 Ω coaxial video cables from camera sensor output to monitor or recorder input over distances up to 100 m. IC Role / Device Role / Timing Role: Dual-channel buffer and gain stage providing impedance matching, signal restoration, and differential gain/phase correction. Use Value: Maintains 0.02% differential gain error and 0.028° phase error across 40 MHz bandwidth, ensuring broadcast-compliant color reproduction without post-processing. | Use Scenario: Conditioning analog RGB or YUV outputs from CMOS image sensors before ADC sampling or encoder input. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate amplifier with matched channel performance for parallel signal paths in multi-sensor rigs. Use Value: 145 MHz bandwidth and 1600 V/µs slew rate preserve edge integrity in high-resolution still capture and slow-motion video modes. |
| Video Switcher Backplane | Special Effects Generator |
Use Scenario: Routing multiple video sources through matrix switchers with minimal crosstalk and gain variation between ports. IC Role / Device Role / Timing Role: Channel-matched driver for switcher output stage, ensuring consistent signal amplitude and timing across all outputs. Use Value: 0.1 dB gain flatness match at 40 MHz and –75 dB crosstalk enable seamless transitions between sources without visible artifacts. | Use Scenario: Real-time analog video manipulation including keying, chroma blending, and analog delay lines in broadcast production equipment. IC Role / Device Role / Timing Role: High-speed signal path component supporting sub-ns settling time and low group delay variation. Use Value: 40 ns settling time to 0.1% at ±15 V enables precise synchronization of overlay graphics with live video frames. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual video amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6702MA/NOPB | Higher 1.7 GHz bandwidth but higher 11.5 mA quiescent current per channel; no guaranteed differential gain/phase specs for video. | Better suited for RF/IF signal chains than NTSC/PAL video; lacks video-specific characterization at 150 Ω load. | Select LMH6702MA/NOPB only when >500 MHz bandwidth is required and video compliance testing is not mandated. |
| THS3202D | Lower 400 MHz bandwidth but lower 7.5 mA quiescent current; differential gain error specified at 0.05% (vs. AD812ARZ-REEL's 0.02%). | Valid for SD/HD video but not broadcast-grade; optimized for lower power rather than ultimate color fidelity. | Choose THS3202D for cost-sensitive consumer electronics where 0.05% differential gain meets system requirements. |
Compared with LMH6702MA/NOPB and THS3202D, the AD812ARZ-REEL uniquely balances broadcast-grade video specifications (0.02% DG, 0.028° DP), dual-channel SOIC integration, and low 4.0 mA/channel quiescent current - making it the only option qualified for professional camera and switcher designs requiring NTSC/PAL compliance.
Availability
AD812ARZ-REEL is available at Aetrix Electronics and suitable for professional video equipment, broadcast infrastructure, and industrial imaging systems requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for AD812ARZ-REEL 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The AD812 belongs to Analog Devices' precision video amplifier product line, engineered specifically for broadcast, medical imaging, and test equipment applications demanding ultra-low differential gain/phase error and high channel matching.
FAQ
What supply voltage range does the AD812ARZ-REEL support?
The AD812ARZ-REEL operates from a single +2.4 V to +36 V supply or dual ±1.2 V to ±18 V supplies. At +3 V single supply, it delivers 40 MHz 0.1 dB bandwidth and 1.0–1.3 Vp-p output swing into 150 Ω - enabling battery-powered portable video gear. Full specification compliance requires operation within the industrial temperature range (–40°C to +85°C).
How does the AD812ARZ-REEL achieve low differential gain and phase error?
The AD812ARZ-REEL achieves 0.02% differential gain error and 0.028° differential phase error through precision current-feedback architecture, matched transistor pairs, and optimized biasing for 150 Ω video loads. These parameters are measured under NTSC conditions with G = +2 and RL = 150 Ω, confirming suitability for broadcast video where color fidelity is critical - unlike general-purpose op amps lacking video-specific characterization.
Can the AD812ARZ-REEL drive 75 Ω coaxial cables directly?
Yes - the AD812ARZ-REEL is explicitly optimized for driving back-terminated 75 Ω video cables (equivalent to 150 Ω differential load). With 50 mA output current per channel and rail-to-rail swing (1 V from rails), it maintains 0.1 dB gain flatness to 40 MHz and meets NTSC differential gain/phase specs without external buffers. Figure 46 in the AD812ARZ-REEL datasheet shows the recommended G = +2 line driver configuration using RF = RG = 715 Ω.
What is the maximum crosstalk between channels in the AD812ARZ-REEL?
The AD812ARZ-REEL guarantees –75 dB dynamic crosstalk at 5 MHz between channels, measured from OUT2 to –IN1. This is achieved through internal layout isolation and requires proper PCB design: separate ground returns, non-overlapping signal traces, and localized 0.1 µF + 1 µF bypassing at both V+ and V– pins. Crosstalk degrades above 10 MHz, so high-frequency routing must follow the guidelines in the AD812ARZ-REEL application notes.
Is the AD812ARZ-REEL suitable for single-supply video applications?
Yes - the AD812ARZ-REEL supports true single-supply operation from +3 V to +36 V with input common-mode range extending to 1.0–2.0 V at +3 V and 1.0–4.0 V at +5 V. Its rail-to-rail output swing (1 V from rails) allows direct interfacing with 1 Vp-p video signals without level shifters. The datasheet provides verified single-supply schematics (e.g., Figure 46) and specifies differential gain/phase performance under +3 V and +5 V conditions.
AD812ARZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Current Feedback
- Output Type:
- -
- Number of Circuits:
- 2
- -3db Bandwidth:
- 145 MHz
- Slew Rate:
- 1600V/µs
- Current - Supply:
- 4.5 mA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply, Single/Dual (±):
- 2.4V ~ 36V, ±1.2V ~ 18V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
AD812ARZ-REEL FAQ
1.How can I place an order for AD812ARZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD812ARZ-REEL 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 AD812ARZ-REEL reliable?
The price and inventory of AD812ARZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD812ARZ-REEL is usually 5 days.
3.What payment methods are accepted for AD812ARZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD812ARZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD812ARZ-REEL?
AD812ARZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD812ARZ-REEL 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 AD812ARZ-REEL?
For technical support, including AD812ARZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD812ARZ-REEL requirements.
6.How does Aetrix verify that AD812ARZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD812ARZ-REEL 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 AD812ARZ-REEL meets industry standards.
7.What is the process for return or replacement of AD812ARZ-REEL?
All AD812ARZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD812ARZ-REEL, 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 AD812ARZ-REEL part is unused and in its original packaging.
Return procedure for AD812ARZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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