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Analog Devices Inc. AD812AR-REEL7
- Part No.:
- AD812AR-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Video Amps and Modules
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD812AR-REEL7.pdf
- Description:
- IC AMP CURRENT FEEDBACK 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,746
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Product details
Overview
AD812AR-REEL7 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 AD812AR-REEL7 datasheet, AD812AR-REEL7 pinout, AD812AR-REEL7 application, or AD812AR-REEL7 equivalent, key selection criteria include single-supply operation down to +3 V, rail-to-rail output swing (1 V from rails), matching performance (0.1 dB gain flatness match at 40 MHz), and industrial temperature range (–40°C to +85°C).
Technical Context
The AD812AR-REEL7 implements a current-feedback architecture with high transimpedance gain (up to 800 kΩ open-loop) and low input impedance at the inverting node (≈90 Ω). Its bandwidth scales with feedback resistor value and supply voltage - e.g., 100 MHz at ±15 V / G = +2 with RF = 715 Ω.
It features matched dynamic performance between channels: –75 dB crosstalk at 5 MHz, 0.1 dB gain flatness match up to 40 MHz, and <3.6 mV DC offset mismatch over temperature. Input common-mode range extends to ±VS on dual supplies and 1.0 V to 2.0 V on +3 V single supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (–3 dB) | 145 MHz at ±15 V, G = +1 - enables full HD video signal amplification without attenuation. |
| Slew Rate | 1600 V/µs at ±15 V - supports fast transient response for composite and component video signals. |
| Differential Gain Error | 0.02% at ±15 V, NTSC, RL = 150 Ω - preserves color fidelity in broadcast-grade video systems. |
| Differential Phase Error | 0.028° at ±15 V, NTSC, RL = 150 Ω - maintains precise timing alignment of chrominance components. |
| Output Current | 50 mA per amplifier - drives one back-terminated 75 Ω video line (150 Ω load) with headroom. |
| 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 rail-flexible designs. |
| Quiescent Current | 4.0 mA per amplifier max at ±5 V - enables low-power operation in multi-channel video processing modules. |
Pinout & Package
AD812AR-REEL7 is housed in an 8-lead plastic SOIC (SO-8) package, RoHS-compliant, with standard JEDEC MS-012AC footprint and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT1 | Amplifier 1 output | Delivers buffered video signal; capable of ±3.8 V swing into 150 Ω at ±5 V. |
| 2: –IN1 | Inverting input, Amp 1 | Low-impedance node (~90 Ω); sets closed-loop gain with feedback resistor. |
| 3: +IN1 | Noninverting input, Amp 1 | High-impedance node (15 MΩ); used for reference biasing in single-supply configurations. |
| 4: V+ | Positive supply | Accepts +3 V to +36 V (single) or +18 V (dual); bypassing with 0.1 µF + 1 µF required. |
| 5: OUT2 | Amplifier 2 output | Independent output; matches OUT1 in bandwidth, drive, and distortion performance. |
| 6: –IN2 | Inverting input, Amp 2 | Electrically isolated from –IN1; critical for minimizing inter-channel crosstalk. |
| 7: +IN2 | Noninverting input, Amp 2 | Independent bias node; supports dual-channel DC-coupled or AC-coupled video paths. |
| 8: V– | Negative supply | Ground (single supply) or –18 V (dual); requires low-inductance ground return path. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel integration | Two independent current-feedback amplifiers in one SOIC-8 - reduces PCB area by >40% vs. discrete solutions. |
| Video-optimized flatness | 0.1 dB gain flatness to 40 MHz at G = +2 - ensures uniform frequency response across NTSC/PAL bandwidth. |
| Single-supply capability | Operates from +3 V with 1.0–2.0 V input common-mode range - enables direct interface with 3.3 V logic and ADCs. |
| Output drive strength | 50 mA per channel into 150 Ω - sustains 1 Vp-p video signal integrity over long cables without external buffers. |
| Channel matching | 0.1 dB gain flatness match and –75 dB crosstalk at 5 MHz - preserves synchronization in dual-video-path systems. |
Applications
| Video Line Driver | Professional Camera Signal Chain |
|---|---|
Use Scenario: Driving 75 Ω coaxial cable from camera sensor output to monitor or recorder. IC Role / Device Role / Timing Role: Dual-channel video buffer with back-termination support and minimal group delay variation. Use Value: Maintains 0.02% differential gain and 0.028° phase error across 4.2 MHz NTSC baseband, preserving color accuracy. | Use Scenario: Amplifying RGB or YUV analog outputs from image sensor ASIC before digitization. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate dual op amp providing gain +2 and DC-coupled signal conditioning. Use Value: 1600 V/µs slew rate prevents edge ringing on 1080p sync pulses; 3.5 nV/√Hz input noise avoids SNR degradation. |
| Video Switcher Input Stage | Special Effects Generator Output Buffer |
Use Scenario: Accepting multiple video sources in broadcast switcher, selecting one for routing. IC Role / Device Role / Timing Role: Input buffer isolating source impedance and enabling clean switching without ghosting. Use Value: High input impedance (>15 MΩ noninverting input) prevents loading of upstream sources; low crosstalk (<–72 dB) avoids bleed-through during transitions. | Use Scenario: Output stage of analog video effects unit (e.g., chroma key, wipe generator) feeding modulator or distribution amp. IC Role / Device Role / Timing Role: Final gain stage delivering full-swing composite video with precise timing alignment. Use Value: Matched channel performance ensures identical rise/fall times across R/G/B paths, eliminating color skew in real-time effects. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual video amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| THS3202DR | Higher slew rate (3000 V/µs), higher supply current (12 mA/amp), no specified differential gain/phase data. | Better for ultra-high-speed pulse applications; less validated for broadcast video fidelity. | Choose THS3202DR when bandwidth >200 MHz and slew rate >2500 V/µs are required; verify differential specs independently. |
| LMH6738MA | Lower power (3.5 mA/amp), lower bandwidth (900 MHz but only at G = +1), no guaranteed differential gain spec. | Optimized for wideband instrumentation; lacks video-specific characterization at 150 Ω load. | Choose LMH6738MA for general-purpose high-speed gain blocks where video fidelity metrics are secondary. |
Compared with THS3202DR and LMH6738MA, AD812AR-REEL7 uniquely combines broadcast-validated differential gain/phase performance, dual-channel integration in SOIC-8, and single-supply operation down to +3 V - making it the only option qualified for professional video line driving per NTSC/PAL standards.
Availability
AD812AR-REEL7 is available at Aetrix Electronics and suitable for professional video equipment, broadcast infrastructure, and industrial imaging systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD812AR-REEL7 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, serving precision instrumentation, communications, and industrial markets.
The AD812 belongs to Analog Devices' video amplifier product line, designed specifically for broadcast-quality analog video signal conditioning - emphasizing differential gain/phase accuracy, channel matching, and robust 75 Ω/150 Ω load drive.
FAQ
What is the minimum supply voltage for AD812AR-REEL7 in single-supply operation?
The AD812AR-REEL7 operates from a minimum single supply of +2.4 V, with functional specifications guaranteed from +3 V. At +3 V, it delivers 30–40 mA output current, 40 MHz 0.1 dB bandwidth at G = +2, and 0.15% differential gain error - sufficient for portable video monitors and battery-powered capture devices.
Does AD812AR-REEL7 support DC-coupled video signal paths?
Yes, AD812AR-REEL7 supports DC-coupled operation. Its input common-mode voltage range is 1.0 V to 2.0 V on +3 V supply and ±13.5 V on ±15 V supply. When used with proper level-shifting bias networks at +IN1/+IN2, it preserves black-level accuracy and eliminates sync tip clipping in studio-grade analog video systems.
What is the maximum load capacitance AD812AR-REEL7 can drive stably?
AD812AR-REEL7 can drive up to 510 pF capacitive load stably when series-output resistance (RS) is added: 15 Ω for CL = 510 pF at ±15 V (Figure 44). Without RS, oscillation may occur above ~50 pF. For 75 Ω coaxial cable (typically 50–100 pF/m), RS = 0 Ω is acceptable up to 10 m length.
How does AD812AR-REEL7 perform in terms of power supply rejection ratio (PSRR)?
AD812AR-REEL7 achieves 70–80 dB PSRR over DC to 100 kHz, measured as input offset voltage change vs. supply variation. This ensures minimal hum injection and supply ripple coupling into video signals - critical for clean analog output in mixed-signal PCB environments with switching regulators.
Is AD812AR-REEL7 pin-compatible with other dual op amps in SOIC-8 packages?
No, AD812AR-REEL7 uses a nonstandard pinout optimized for video: V+ and V– are on pins 4 and 8, not the typical corner positions. Its –IN/+IN/OUT arrangement differs from general-purpose dual op amps (e.g., OP27, LM358). Direct replacement requires PCB layout revision; it is not a drop-in substitute.
AD812AR-REEL7 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:
- Obsolete
- 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
AD812AR-REEL7 FAQ
1.How can I place an order for AD812AR-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD812AR-REEL7 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 AD812AR-REEL7 reliable?
The price and inventory of AD812AR-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD812AR-REEL7 is usually 5 days.
3.What payment methods are accepted for AD812AR-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD812AR-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD812AR-REEL7?
AD812AR-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD812AR-REEL7 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 AD812AR-REEL7?
For technical support, including AD812AR-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD812AR-REEL7 requirements.
6.How does Aetrix verify that AD812AR-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD812AR-REEL7 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 AD812AR-REEL7 meets industry standards.
7.What is the process for return or replacement of AD812AR-REEL7?
All AD812AR-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD812AR-REEL7, 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 AD812AR-REEL7 part is unused and in its original packaging.
Return procedure for AD812AR-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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