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Analog Devices Inc. AD8079ARZ
- Part No.:
- AD8079ARZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8079ARZ.pdf
- Description:
- IC BUFFER 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,875
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Product details
Overview
AD8079ARZ from Analog Devices is a dual, low-power, current-feedback video buffer with factory-set gain of +2.0, 260 MHz –3 dB bandwidth, 0.01% differential gain error, and 8-pin SOIC packaging - designed for driving differential video loads in professional cameras and switchers.
For engineers reviewing the AD8079ARZ datasheet, AD8079ARZ pinout, AD8079ARZ application, or AD8079ARZ equivalent, key selection criteria include gain accuracy (±0.1% matching), crosstalk (<–70 dB @ 5 MHz), output drive (>70 mA per amplifier), and video-optimized distortion performance (–65 dBc THD @ 5 MHz).
Technical Context
The AD8079ARZ implements a dual current-feedback amplifier architecture with internal laser-trimmed gain-setting resistors (750 Ω feedback, 750 Ω input for G = +2.0), eliminating external components and parasitic capacitance at the inverting input to achieve 0.1 dB gain flatness to 50 MHz.
Its optimized 8-pin SOIC pinout places two ground pins between inputs and outputs to suppress coupling, enabling <–70 dB output-to-output crosstalk at 5 MHz and supporting simultaneous driving of up to four back-terminated 75 Ω video loads while maintaining 0.01%/0.07° differential gain/phase performance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3 dB Bandwidth | 260 MHz - supports high-definition video signal integrity through HDMI/SDI baseband paths. |
| Gain Accuracy | +2.0 ±0.002 V/V (no load) - enables single-point system gain calibration without external resistors. |
| Differential Gain Error | 0.01% @ NTSC, RL = 150 Ω - meets broadcast-grade video fidelity requirements. |
| Slew Rate | 800 V/µs (4 V step) - ensures sub-40 ns settling to 0.1% for fast transient video sync pulses. |
| Output Drive | 70 mA per amplifier - drives 4× 75 Ω back-terminated loads (2 per side) with minimal signal degradation. |
| Power Consumption | 50 mW per amplifier (±5 V) - enables portable and thermally constrained video equipment designs. |
| Crosstalk | –70 dB @ 5 MHz - prevents inter-channel interference in dual-channel video routing applications. |
Pinout & Package
AD8079ARZ is housed in an 8-pin plastic SOIC (SO-8) package measuring 5.00 mm × 6.20 mm × 1.75 mm, with standard JEDEC MS-012AC outline and 1.27 mm pitch. The package supports industrial temperature operation (–40°C to +85°C) and features ESD protection rated to 5 kV.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+IN1) | Noninverting input, Channel 1 | High-impedance (10 MΩ), low-capacitance (1.5 pF) input for single-ended video source connection. |
| 2 (GND) | Ground, Channel 1 input reference | Physical isolation barrier minimizing coupling between Channel 1 input and Channel 2 output. |
| 3 (GND) | Ground, Channel 1 output reference | Second dedicated ground pin separating Channel 1 output from Channel 2 input - critical for crosstalk suppression. |
| 4 (+IN2) | Noninverting input, Channel 2 | Independent high-Z input for second video channel or complementary signal path. |
| 5 (OUT1) | Output, Channel 1 | Capable of >70 mA sink/source into 75 Ω loads; optimized for back-terminated video line driving. |
| 6 (+VS) | Positive supply rail | Accepts ±3 V to ±6 V supplies; operates on ±5 V nominal with 10.0–11.5 mA total quiescent current. |
| 7 (–VS) | Negative supply rail | Supports symmetrical dual-supply operation; PSRR >49 dB (positive) and >40 dB (negative) at DC. |
| 8 (OUT2) | Output, Channel 2 | Matched output stage to OUT1; enables true dual-channel video distribution with tight gain matching (0.1%). |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set gain | G = +2.0 (A grade) with ±0.002 V/V tolerance - eliminates external gain-setting resistors and layout parasitics. |
| Optimum dual pinout | Two dedicated GND pins separating inputs and outputs - achieves <–70 dB crosstalk at 5 MHz without shielding. |
| Video-optimized linearity | 0.01% differential gain / 0.02° differential phase @ NTSC - satisfies SMPTE 259M and ITU-R BT.601 broadcast standards. |
| High-speed settling | 40 ns to 0.1% (2 V step) - preserves timing integrity for HD video pixel clocks and sync signals. |
| Low power per channel | 5 mA per amplifier @ ±5 V - enables dual-channel video buffering in battery-powered field equipment. |
Applications
| Professional Cameras | Video Switchers |
|---|---|
Use Scenario: Driving dual analog video outputs (Y/C or RGB) from image sensor ADCs to BNC connectors in broadcast ENG cameras. IC Role / Device Role / Timing Role: Dual-channel video buffer with matched gain and phase response, preserving color fidelity across parallel signal paths. Use Value: 0.01% differential gain error ensures accurate skin-tone reproduction; 260 MHz bandwidth supports 1080p60 component video without roll-off. | Use Scenario: Routing multiple SD/HD video sources to program/preview buses in live production switchers with minimal latency. IC Role / Device Role / Timing Role: Dual-line driver providing isolated, low-crosstalk amplification for parallel video distribution paths. Use Value: –70 dB crosstalk at 5 MHz prevents ghosting or bleed between active video channels during rapid switching. |
| Differential A-to-D Drivers | RF Receivers |
Use Scenario: Conditioning differential analog signals before feeding them to high-speed dual ADCs (e.g., AD92xx series) in communications test equipment. IC Role / Device Role / Timing Role: High-fidelity, low-noise buffer with precise gain matching to maximize SNR and ENOB of downstream converters. Use Value: 2.0 nV/√Hz input voltage noise and –65 dBc THD @ 5 MHz preserve dynamic range for 12–14-bit conversion accuracy. | Use Scenario: Buffering IF outputs from quadrature demodulators (e.g., ADL5380) prior to baseband filtering in wideband SDR receivers. IC Role / Device Role / Timing Role: Dual-channel baseband amplifier delivering matched I/Q paths with minimal group delay variation. Use Value: 0.1 dB gain flatness to 50 MHz ensures amplitude consistency across multi-MHz IF bandwidths (e.g., 20–40 MHz). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed video buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8075ARZ | Single-channel, same G = +2.0, identical specs except no dual-channel integration. | Requires two devices for dual-path use; increases board area and power vs. AD8079ARZ's monolithic dual design. | Select when only one channel is needed or when channel isolation requirements exceed AD8079ARZ's –70 dB spec. |
| THS3202D | Gain = +1.0 fixed, higher slew rate (2000 V/µs), but no factory-set +2.0 option or differential-phase optimization. | Lacks video-specific tuning (0.01% DG/DP); requires external gain resistors, increasing layout sensitivity. | Prefer for general-purpose high-speed analog signal routing where video fidelity is secondary to raw speed. |
Compared with AD8079ARZ, AD8075ARZ delivers identical per-channel performance but lacks integrated dual-channel synchronization and crosstalk control, while THS3202D offers higher slew rate but sacrifices video-optimized linearity and factory gain calibration - making AD8079ARZ the optimal choice for broadcast-grade dual-path video buffering.
Availability
AD8079ARZ is available at Aetrix Electronics and suitable for professional video equipment, broadcast infrastructure, and high-speed data acquisition systems requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature compliance.
Supply support for AD8079ARZ 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 AD8079ARZ belongs to Analog Devices' high-speed video amplifier product line, engineered specifically for broadcast, medical imaging, and instrumentation applications demanding precision differential gain, ultra-low phase error, and robust dual-channel isolation.
FAQ
What is the operating supply voltage range for the AD8079ARZ?
The AD8079ARZ operates from ±3.0 V to ±6.0 V dual supplies, with typical performance characterized at ±5 V. It draws 10.0–11.5 mA total quiescent current across both amplifiers within the industrial temperature range (–40°C to +85°C). The device is not rated for single-supply operation above +12 V, and absolute maximum supply voltage is ±6.3 V per rail.
Does the AD8079ARZ require external gain-setting resistors?
No, the AD8079ARZ does not require external gain-setting resistors. It integrates factory-laser-trimmed internal resistors configured for a precise gain of +2.0 (A grade), achieving ±0.002 V/V accuracy at no load. This eliminates layout parasitics associated with external feedback networks and ensures 0.1 dB gain flatness to 50 MHz without additional components.
Can the AD8079ARZ drive 75 Ω back-terminated video lines directly?
Yes, the AD8079ARZ is explicitly designed to drive 75 Ω back-terminated video loads. Each amplifier delivers >70 mA output current and maintains 0.01% differential gain / 0.07° differential phase error when driving up to four such loads (two per amplifier), as verified in Analog Devices' Figure 26 and specification table under RL = 75 Ω conditions.
What is the differential phase error specification for the AD8079ARZ at NTSC video frequencies?
The AD8079ARZ exhibits 0.02° differential phase error at NTSC video frequencies with a 150 Ω load and 0.07° with a 75 Ω load, as specified in the "Differential Phase Error" row of the AD8079A/AD8079B specifications table. These values are measured under standard NTSC conditions and confirm compliance with broadcast video fidelity requirements.
Is the AD8079ARZ pin-compatible with other members of the AD807x family?
Yes, the AD8079ARZ shares identical 8-pin SOIC pinout and footprint with AD8075ARZ (single-channel) and AD8079BRZ (G = +2.2), enabling drop-in substitution where gain tolerance or channel count permits. Pin functions - including dual GND separation and matched OUT/+IN placement - are preserved across all AD807x variants per the functional block diagram and outline drawings.
AD8079ARZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Buffer
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 800V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 260 MHz
- Current - Input Bias:
- 3 µA
- Voltage - Input Offset:
- 10 mV
- Current - Supply:
- 10mA (x2 Channels)
- Current - Output / Channel:
- 70 mA
- Voltage - Supply Span (Min):
- 6 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD8079ARZ FAQ
1.How can I place an order for AD8079ARZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8079ARZ 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 AD8079ARZ reliable?
The price and inventory of AD8079ARZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8079ARZ is usually 5 days.
3.What payment methods are accepted for AD8079ARZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8079ARZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8079ARZ?
AD8079ARZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8079ARZ 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 AD8079ARZ?
For technical support, including AD8079ARZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8079ARZ requirements.
6.How does Aetrix verify that AD8079ARZ is sourced from the original manufacturer or authorized distributors?
All AD8079ARZ 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 AD8079ARZ meets industry standards.
7.What is the process for return or replacement of AD8079ARZ?
All AD8079ARZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8079ARZ, 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 AD8079ARZ part is unused and in its original packaging.
Return procedure for AD8079ARZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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