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Analog Devices Inc. AD818AR-REEL7
- Part No.:
- AD818AR-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Video Amps and Modules
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD818AR-REEL7.pdf
- Description:
- IC AMP VOLTAGE FEEDBACK 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,741
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Product details
Overview
AD818AR-REEL7 from Analog Devices is a low-cost, low-power voltage-feedback video operational amplifier optimized for gain ≥ +2 or –1 configurations in professional video signal conditioning. It delivers 55 MHz 0.1 dB bandwidth (G = +2, +5 V supply), 0.01% differential gain error, and 50 mA output drive-enabling back-terminated 75 Ω cable driving in video cameras and broadcast equipment.
For engineers reviewing the AD818AR-REEL7 datasheet, AD818AR-REEL7 pinout, AD818AR-REEL7 application, or AD818AR-REEL7 equivalent, this page provides verified specifications including slew rate (400 V/µs typ., ±5 V), settling time (45 ns to 0.1%), differential phase (0.06° typ., NTSC, ±5 V), single-supply operation (+5 V), and SOIC-8 package compatibility-critical for video line driver, CCD imaging buffer, and CATV front-end designs.
Technical Context
The AD818AR-REEL7 employs a degenerated NPN input stage followed by a folded-cascode gain stage and class AB emitter-follower output buffer, enabling high output current (50 mA) with low distortion. Its architecture supports stable operation into capacitive loads ≤10 pF and maintains 0.1 dB flatness up to 55 MHz at G = +2 under +5 V supply.
It is fully specified for dual supplies (±5 V to ±15 V) and single +5 V operation, with quiescent current capped at 7.5 mA. Input common-mode range extends to +4.3 V / –3.4 V (±5 V) and +14.3 V / –13.4 V (±15 V), supporting wide-swing video signal handling without rail-to-rail input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| 0.1 dB Bandwidth | 55 MHz at G = +2, +5 V supply - ensures full NTSC/PAL subcarrier fidelity and HD video signal integrity. |
| Slew Rate | 400 V/µs typical (±5 V) - enables clean 10 V step response with minimal slewing distortion in fast video transitions. |
| Settling Time | 45 ns to 0.1% (±5 V, –2.5 V to +2.5 V step) - meets timing-critical requirements in digital video sampling and multiplexing. |
| Differential Gain Error | 0.01% typical (NTSC, RL = 150 Ω, ±5 V) - preserves color saturation accuracy in analog video transmission. |
| Output Current | 50 mA minimum (±5 V or ±15 V) - directly drives 75 Ω back-terminated coaxial cables without external buffers. |
| Supply Current | 7.5 mA maximum (±5 V) - enables power-sensitive portable video equipment and multi-channel systems. |
| Input Voltage Noise | 10 nV/√Hz at 10 kHz - maintains SNR >63 dB THD in baseband video amplification. |
Pinout & Package
AD818AR-REEL7 is housed in an 8-pin plastic SOIC (R-8) package, 3.9 mm × 4.9 mm, with standard JEDEC MS-012AC footprint and 1.27 mm pitch. Thermal resistance θJA = 155°C/W in free air.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null (–) | Connects to wiper of 10 kΩ potentiometer between Pins 5 and 8 for input offset adjustment (±10 mV range). |
| 2 | Inverting Input (–IN) | Differential input node; requires balancing resistor for bias current cancellation in precision inverting configurations. |
| 3 | Noninverting Input (+IN) | Differential input node; referenced to ground or common-mode bias in single-supply video applications. |
| 4 | Negative Supply (–VS) | Accepts –5 V to –15 V (dual) or ground (single +5 V); must be bypassed with 0.1 µF ceramic capacitor. |
| 5 | Offset Null (+) | Connects to one end of null potentiometer; used with Pin 1 and Pin 8 for fine DC offset trimming. |
| 6 | Output | Class AB emitter-follower output capable of ±3.6 V swing into 150 Ω (±5 V) and 50 mA continuous sourcing/sinking. |
| 7 | Positive Supply (+VS) | Accepts +5 V (single) or +5 V to +15 V (dual); requires local 0.1 µF ceramic bypass to ground. |
| 8 | Null Common / Ground | Reference terminal for offset null circuit; tied to ground in non-nulling applications or to supply midpoint in single-supply bias networks. |
Key Features
| Feature | Design Value |
|---|---|
| Video-optimized AC performance | 0.01% differential gain and 0.06° differential phase error (NTSC, ±5 V) - preserves chrominance fidelity in composite video paths. |
| Single-supply operability | Fully characterized from +5 V only - eliminates need for negative rail in battery-powered camcorders and portable monitors. |
| High-output-current buffer | 50 mA min. output drive into 150 Ω - directly terminates 75 Ω video lines without external current boosters. |
| Low-power video amplification | 7.5 mA max. quiescent current - enables dense channel count in multi-input video switchers and distribution amps. |
| Stable capacitive load drive | Specified for ≤10 pF capacitive loads - supports direct connection to coaxial cable stubs and PCB trace capacitance without oscillation. |
Applications
| Professional Video Camera Signal Chain | HD Broadcast Monitor Input Buffer |
|---|---|
|
Use Scenario: Amplifying and conditioning composite or component video signals from image sensor outputs prior to encoding or transmission. IC Role / Device Role / Timing Role: High-speed gain stage (G = +2) with precise differential gain/phase matching for NTSC/PAL subcarriers. Use Value: Maintains 0.01% differential gain error and 55 MHz 0.1 dB bandwidth to prevent color bleeding and edge ringing in 1080i signals. |
Use Scenario: Driving long 75 Ω coaxial cables from video processing ASICs to CRT/LCD display inputs in studio monitors. IC Role / Device Role / Timing Role: Back-terminated line driver with 50 mA output capability and 80 ns settling to 0.01%. Use Value: Delivers full-swing 1 VPP video with <0.1 dB flatness to 55 MHz, eliminating need for discrete emitter followers. |
| CATV Headend Channel Amplifier | Color Copier Image Scanner Front-End |
|
Use Scenario: Boosting individual RF-modulated video channels before combining into broadband downstream spectrum. IC Role / Device Role / Timing Role: Wideband post-filter amplifier operating at G = –1 with 70 MHz 3 dB BW (±5 V). Use Value: Provides 70 MHz bandwidth and –63 dB THD at 1 MHz to suppress intermodulation distortion in multi-channel QAM systems. |
Use Scenario: Conditioning analog RGB line-scan outputs from CIS/CCD sensors before ADC sampling in high-resolution document scanners. IC Role / Device Role / Timing Role: Low-noise (10 nV/√Hz), fast-settling (45 ns to 0.1%) buffer for 20 MSPS pixel clock domains. Use Value: Enables accurate 12-bit grayscale reproduction with <0.05° differential phase shift across 3.58 MHz color subcarrier band. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar video op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6629MA/NOPB | Higher slew rate (1800 V/µs), wider 3 dB BW (1.5 GHz), but higher supply current (12.5 mA) and no single +5 V spec. | Better suited for >100 MHz RGB video or test equipment; less optimal for low-power portable video where AD818AR-REEL7's 7.5 mA is critical. | Select LMH6629MA/NOPB when bandwidth >500 MHz and speed outweigh power constraints; retain AD818AR-REEL7 for cost-sensitive, +5 V-only video line drivers. |
| THS3201D | Higher output current (120 mA), rail-to-rail output, but differential gain error (0.03%) higher than AD818AR-REEL7 and no NTSC-optimized characterization. | Preferred for driving heavy capacitive loads or low-impedance active matrix displays; lacks AD818AR-REEL7's documented NTSC/PAL video fidelity validation. | Choose THS3201D for high-current, wide-VOUT swing needs; choose AD818AR-REEL7 when differential gain/phase compliance per NTSC standards is mandatory. |
Compared with LMH6629MA/NOPB and THS3201D, AD818AR-REEL7 uniquely balances NTSC-validated video fidelity (0.01% DG), +5 V single-supply operation, and 7.5 mA quiescent current-making it the most cost-effective, standards-compliant choice for professional analog video infrastructure where power and color accuracy are co-constrained.
Availability
AD818AR-REEL7 is available at Aetrix Electronics and suitable for professional video camera signal chains, broadcast monitor input buffering, and CATV headend channel amplification requiring stable component supply across extended production lifecycles.
Supply support for AD818AR-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 since 1965.
The AD818 belongs to Analog Devices' video op amp product line, engineered specifically for analog video signal conditioning in broadcast, medical imaging, and test equipment-emphasizing differential gain/phase accuracy, cable drive capability, and low-power operation.
FAQ
What is the maximum capacitive load the AD818AR-REEL7 can drive stably?
The AD818AR-REEL7 is specified to drive capacitive loads up to 10 pF without oscillation or peaking, as confirmed in the Absolute Maximum Ratings and Typical Characteristics sections of the official datasheet. This capability supports direct interface to short coaxial cable stubs and PCB trace capacitance in video routing applications. For heavier loads, external isolation resistors or feedback compensation may be required. The AD818AR-REEL7's internal compensation ensures stability across its full gain range (≥+2 or –1) under these conditions.
Does the AD818AR-REEL7 support true single-supply operation down to 0 V on the negative rail?
Yes-the AD818AR-REEL7 is fully characterized for single +5 V operation with the negative supply pin (Pin 4) connected to ground. Its input common-mode range extends to +0.9 V (min) and +4.3 V (max) under +5 V supply, and output swing reaches +1.5 V to +3.5 V (into 500 Ω), enabling DC-coupled video signal handling with proper level-shifting. This makes AD818AR-REEL7 suitable for portable camcorders and USB-powered video interfaces where dual supplies are impractical.
What is the differential phase error of the AD818AR-REEL7 at NTSC frequency under ±5 V supply?
The AD818AR-REEL7 exhibits a typical differential phase error of 0.06° and a maximum of 0.09° at the NTSC subcarrier frequency (3.58 MHz), measured with RL = 150 Ω and gain = +2 under ±5 V supply conditions. This value is explicitly listed in the "Differential Phase Error" row of the Dynamic Performance table in the datasheet and confirms compliance with broadcast-grade analog video timing requirements.
Can the AD818AR-REEL7 be used in inverting configuration with gain = –1?
Yes-the AD818AR-REEL7 is explicitly optimized for inverting configurations with gain = –1, delivering 70 MHz 3 dB bandwidth (±5 V) and 34 MHz 0.1 dB flatness. The datasheet provides dedicated connection diagrams (Figure 22), pulse response waveforms (Figures 23–26), and AC performance specs for G = –1 across all supply conditions. Its symmetrical slew rate and low distortion make AD818AR-REEL7 well-suited for inverting video gain stages and differential receivers.
Is the AD818AR-REEL7 pin-compatible with other SOIC-8 op amps like the AD829 or OP27?
No-the AD818AR-REEL7 has a unique pinout optimized for video performance, including dedicated offset null pins (1 and 5) and specific supply pin placement (4 and 7). Neither the AD829 nor OP27 share this arrangement: AD829 uses Pin 1 for compensation, and OP27 places offset null on Pins 1/8. Substituting them would require PCB redesign. Always verify pin mapping using the AD818AR-REEL7 Connection Diagram (Figure 34) before layout integration.
AD818AR-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:
- Voltage Feedback
- Output Type:
- -
- Number of Circuits:
- 1
- -3db Bandwidth:
- 130 MHz
- Slew Rate:
- 500V/µs
- Current - Supply:
- 7 mA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply, Single/Dual (±):
- 5V ~ 36V, ±2.5V ~ 18V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
AD818AR-REEL7 FAQ
1.How can I place an order for AD818AR-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD818AR-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 AD818AR-REEL7 reliable?
The price and inventory of AD818AR-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD818AR-REEL7 is usually 5 days.
3.What payment methods are accepted for AD818AR-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD818AR-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD818AR-REEL7?
AD818AR-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD818AR-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 AD818AR-REEL7?
For technical support, including AD818AR-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD818AR-REEL7 requirements.
6.How does Aetrix verify that AD818AR-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD818AR-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 AD818AR-REEL7 meets industry standards.
7.What is the process for return or replacement of AD818AR-REEL7?
All AD818AR-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD818AR-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 AD818AR-REEL7 part is unused and in its original packaging.
Return procedure for AD818AR-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD818AR-REEL7 Tags
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