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Analog Devices Inc. AD8079BRZ
- Part No.:
- AD8079BRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD8079BRZ.pdf
- Description:
- IC BUFFER 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:135
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Product details
Overview
AD8079BRZ from Analog Devices is a dual, low-power, current-feedback video buffer with factory-set gain of +2.2, optimized for differential line driving and A-to-D converter buffering in ±5 V systems. It delivers 260 MHz –3 dB bandwidth, 800 V/µs slew rate, and maintains 0.01% differential gain / 0.02° differential phase error into 150 Ω loads - enabling high-fidelity NTSC/HDTV signal distribution in professional cameras and video switchers.
For engineers reviewing the AD8079BRZ datasheet, AD8079BRZ pinout, AD8079BRZ application, or AD8079BRZ equivalent, key selection criteria include its tight 0.1% channel-to-channel gain matching, –70 dB output-to-output crosstalk at 5 MHz, 40 ns settling time to 0.1%, and SOIC-8 package compatibility with high-density video PCB layouts.
Technical Context
The AD8079BRZ implements a dual current-feedback amplifier architecture with internal laser-trimmed gain-setting resistors (750 Ω feedback, 625 Ω input for G = +2.2), eliminating external components and parasitic capacitance at the inverting input. Its optimized pinout places two ground pins between inputs and outputs to suppress coupling.
This architecture enables simultaneous high-speed performance (260 MHz bandwidth) and precision video characteristics: 0.1 dB gain flatness to 50 MHz, –65 dBc THD at 5 MHz, and ability to drive up to four 75 Ω back-terminated loads per side while preserving 0.01%/0.07° differential gain/phase - critical for multi-output broadcast infrastructure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3 dB Bandwidth | 260 MHz - supports full HD/3G-SDI baseband video and wideband RF receiver IF stages without attenuation. |
| Slew Rate | 800 V/µs (4 V step) - ensures clean transient response for fast-switching video sync pulses and digital waveform edges. |
| Gain Accuracy | +2.2 ±0.002 V/V (typ.) - eliminates need for external gain calibration in video gain-compensation circuits. |
| Differential Gain Error | 0.01% @ NTSC, RL = 150 Ω - meets SMPTE 253M broadcast standard for color fidelity in camera front-ends. |
| Crosstalk | –70 dB @ 5 MHz - prevents interference between dual channels in stereo audio paths or dual ADC sampling clocks. |
| Supply Current | 5.5 mA per amplifier (±5 V) - enables dual-channel buffering in battery-powered portable video recorders. |
| Output Drive | 70 mA - drives eight 75 Ω back-terminated video lines (four per amplifier) while maintaining <0.1° phase mismatch. |
Pinout & Package
AD8079BRZ is housed in an 8-pin plastic SOIC (SO-8) package with 1.27 mm pitch, 5.00 mm × 6.20 mm body, and industrial temperature range (–40°C to +85°C). The pinout is optimized for minimal crosstalk and simplified layout: dual ground pins isolate inputs from outputs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+IN1) | Noninverting input, Amplifier 1 | High-impedance (10 MΩ), low-capacitance (1.5 pF) node for single-ended video source connection. |
| 2 (GND) | Analog ground, side 1 | Shielding ground between inputs; must connect to low-impedance ground plane to suppress inter-channel coupling. |
| 3 (GND) | Analog ground, side 2 | Isolates outputs from inputs; separates amplifier domains to achieve –70 dB crosstalk at 5 MHz. |
| 4 (+IN2) | Noninverting input, Amplifier 2 | Independent high-Z input for second video channel or complementary signal path. |
| 5 (OUT1) | Output, Amplifier 1 | Capable of 70 mA sink/source; drives 75 Ω or 150 Ω video loads directly with <0.01% gain error. |
| 6 (+VS) | Positive supply | Accepts +3 V to +6 V; bypass with 4.7 µF + 0.1 µF capacitors within 3 mm to minimize PSRR-induced distortion. |
| 7 (–VS) | Negative supply | Accepts –3 V to –6 V; same bypassing requirement as +VS to maintain >49 dB PSRR across band. |
| 8 (OUT2) | Output, Amplifier 2 | Matched output stage to OUT1; enables precise differential signaling when paired with external termination. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-set gain | G = +2.2 (B grade) with 0.1% channel matching - removes external resistor networks and layout sensitivity in gain-critical video chains. |
| Optimum dual pinout | Two dedicated GND pins separating inputs and outputs - reduces PCB routing complexity and eliminates need for guard traces in high-isolation designs. |
| Low power per channel | 5 mA @ ±5 V (50 mW) - allows dual-channel video buffering in thermally constrained enclosures without heatsinking. |
| Video-optimized linearity | 0.01% differential gain / 0.02° differential phase @ NTSC - meets broadcast-grade color accuracy without post-correction circuitry. |
| High ESD tolerance | 5 kV HBM - protects against handling damage during assembly of camera modules and field-deployable video gear. |
Applications
| Professional Camera Front-End | Video Switcher Output Stage |
|---|---|
|
Use Scenario: Driving analog RGB or YPbPr signals from image sensor ADCs to BNC connectors in 4K broadcast cameras. IC Role / Device Role / Timing Role: Dual-channel video buffer with gain compensation (G = +2.2) to offset cable loss and maintain signal integrity over 10 m coaxial runs. Use Value: Preserves 0.01% differential gain and 0.02° phase accuracy at 5 MHz, ensuring SMPTE-compliant color reproduction without calibration firmware. |
Use Scenario: Buffering switched video outputs in multi-input production switchers before distribution to monitors and recorders. IC Role / Device Role / Timing Role: Dual-line driver delivering matched-amplitude, low-crosstalk outputs to multiple 75 Ω destinations simultaneously. Use Value: –70 dB output-to-output crosstalk at 5 MHz prevents ghosting or timing skew between active video sources during transitions. |
| Differential ADC Driver | RF Receiver IF Amplifier |
|
Use Scenario: Converting single-ended baseband video or composite sync signals to balanced differential pairs for high-noise immunity ADC sampling. IC Role / Device Role / Timing Role: High-speed current-feedback buffer configured as single-ended-to-differential driver (Figure 27) with >110 MHz –3 dB bandwidth. Use Value: 40 ns settling to 0.1% and 260 MHz bandwidth ensure accurate sampling of fast-rising video edges and sync pulses without aperture error. |
Use Scenario: Amplifying 70 MHz IF signals in SDR-based RF receivers prior to digitization, requiring wide dynamic range and low distortion. IC Role / Device Role / Timing Role: Dual-channel IF buffer providing gain, isolation, and drive capability for parallel ADC paths or I/Q demodulation chains. Use Value: –65 dBc THD at 5 MHz and 2.0 nV/√Hz input voltage noise preserve SNR in narrowband receiver front-ends operating near thermal noise floor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8075ARZ | Single-channel, G = +2.0, 200 MHz bandwidth, higher quiescent current (7.5 mA) | Lacks dual-channel integration; requires two devices for same functionality, increasing board area and layout complexity. | Choose only if single-channel operation suffices and gain of +2.0 (not +2.2) matches system loss budget. |
| THS3202D | Dual, G = +1.0 fixed, 1.8 GHz bandwidth, higher power (12 mA/channel), no factory gain trim | Requires external gain-setting resistors; lacks laser-trimmed 0.1% matching and video-optimized differential performance. | Select when >1 GHz bandwidth is mandatory and differential gain/phase specs are secondary to raw speed. |
Compared with AD8079BRZ, AD8075ARZ doubles component count and layout effort for dual-channel use, while THS3202D trades guaranteed video fidelity and factory gain accuracy for wider bandwidth - making AD8079BRZ the optimal choice for broadcast-grade, space-constrained, gain-compensated video buffering.
Availability
AD8079BRZ 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 traceable sourcing.
Supply support for AD8079BRZ 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 AD8079BRZ belongs to Analog Devices' high-speed video amplifier product line, engineered specifically for broadcast, medical imaging, and test equipment where differential gain/phase accuracy, crosstalk suppression, and compact dual-channel integration are mission-critical.
FAQ
What is the exact gain setting of AD8079BRZ and how is it implemented?
The AD8079BRZ has a factory-set gain of +2.2, achieved via laser-trimmed internal resistors (750 Ω feedback, 625 Ω input). This eliminates external components and guarantees 0.1% channel-to-channel gain matching. Unlike the AD8079ARZ (G = +2.0), the AD8079BRZ's +2.2 gain compensates for typical system-level signal loss in video distribution chains - a feature confirmed in the Analog Devices datasheet revision A, page 1.
Can AD8079BRZ operate on a single +12 V supply?
Yes, AD8079BRZ supports single-supply operation at +12 V, as stated in the "POWER SUPPLY" section of the datasheet (page 2). In this configuration, the device delivers over 70 mA output current per amplifier while maintaining specified video performance. However, dual ±5 V supplies are recommended for optimal distortion and crosstalk performance, especially in professional video applications where AD8079BRZ is commonly deployed.
What is the maximum number of 75 Ω back-terminated video loads AD8079BRZ can drive per channel?
AD8079BRZ can drive up to four 75 Ω back-terminated video loads per amplifier (eight total), as verified in the "APPLICATIONS" section and Figure 26 of the datasheet. When driving four loads (two per side), it maintains 0.01% differential gain and 0.07° differential phase error - meeting broadcast requirements for multi-monitor distribution without signal degradation.
Does AD8079BRZ require external gain-setting resistors?
No, AD8079BRZ does not require external gain-setting resistors. Its gain of +2.2 is internally set using laser-trimmed thin-film resistors, as explicitly stated in the "PRODUCT DESCRIPTION" (page 1) and "THEORY OF OPERATION" (page 7) sections. This design minimizes external components, reduces PCB area, and ensures consistent gain accuracy across temperature and unit-to-unit variation - a key differentiator of the AD8079BRZ versus generic op amps.
What is the operating temperature range for AD8079BRZ?
AD8079BRZ is rated for the industrial temperature range of –40°C to +85°C, as specified in the "ORDERING GUIDE" (page 4) and "ABSOLUTE MAXIMUM RATINGS" (page 3) sections of the datasheet. This range supports deployment in demanding environments such as outdoor broadcast trucks, industrial vision systems, and field-deployable video test equipment where ambient temperatures exceed commercial limits.
AD8079BRZ 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
AD8079BRZ FAQ
1.How can I place an order for AD8079BRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8079BRZ 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 AD8079BRZ reliable?
The price and inventory of AD8079BRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8079BRZ is usually 5 days.
3.What payment methods are accepted for AD8079BRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8079BRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8079BRZ?
AD8079BRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8079BRZ 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 AD8079BRZ?
For technical support, including AD8079BRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8079BRZ requirements.
6.How does Aetrix verify that AD8079BRZ is sourced from the original manufacturer or authorized distributors?
All AD8079BRZ 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 AD8079BRZ meets industry standards.
7.What is the process for return or replacement of AD8079BRZ?
All AD8079BRZ units undergo pre-shipment inspection (PSI). If there is an issue with AD8079BRZ, 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 AD8079BRZ part is unused and in its original packaging.
Return procedure for AD8079BRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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