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Analog Devices Inc./Maxim Integrated MAX4205EUA+
- Part No.:
- MAX4205EUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4205EUA+.pdf
- Description:
- IC BUFFER 2 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:5,577
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Product details
Overview
The MAX4205EUA+ from Maxim Integrated is a dual ultra-high-speed open-loop buffer with integrated 75Ω back-termination resistors, designed for driving 75Ω coaxial transmission lines in IF/communications systems. It delivers 720MHz -3dB bandwidth, 230MHz 0.1dB gain flatness, 4200V/μs slew rate, ±44mA output current, and operates from ±5V supplies with 2.2mA per buffer quiescent current.
For engineers reviewing the MAX4205EUA+ datasheet, MAX4205EUA+ pinout, MAX4205EUA+ application, or MAX4205EUA+ equivalent, this page provides verified electrical specifications, μMAX-8 package layout, dual-buffer timing role in video/RF signal chains, and validated alternatives for 75Ω line-driving applications requiring low group delay (405ps) and high SFDR (-32dBc at 100MHz).
Technical Context
The MAX4205EUA+ uses a proprietary open-loop architecture eliminating dominant-pole compensation, enabling near-constant 405ps group delay across frequency and avoiding phase-shift-induced instability. Its dual-channel design integrates independent 75Ω termination resistors on each output, matching standard video and broadcast cable impedance without external components.
This architecture avoids closed-loop feedback limitations, delivering stable performance into capacitive loads up to 120pF while maintaining >720MHz bandwidth. The device's 2.1nV/√Hz voltage-noise density and 0.8pA/√Hz current-noise density support high-fidelity signal conditioning before ADC sampling or DAC reconstruction stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| -3dB Bandwidth | 720MHz - supports full NTSC/PAL video bandwidth and multi-carrier RF signals up to UHF. |
| 0.1dB Gain Flatness | 230MHz - ensures amplitude consistency across wideband IF stages without equalization. |
| Slew Rate | 4200V/μs - enables clean 2VP-P pulse response with ≤12ns settling to 0.1%. |
| Output Drive | ±44mA into 75Ω - sustains 2.3VP-P swing into standard video load with <1.3% differential gain error. |
| Voltage-Noise Density | 2.1nV/√Hz at 1MHz - preserves SNR in front-end buffering of low-level RF/IF signals. |
| Group Delay | 405ps - minimizes phase distortion across entire bandwidth for coherent multi-channel systems. |
| Supply Current | 2.2mA per buffer - enables dual-channel high-speed buffering with only 4.4mA total quiescent draw. |
Pinout & Package
The MAX4205EUA+ is housed in an 8-pin μMAX® package (package code U8-1), measuring 3mm × 3mm × 0.8mm with exposed pad for thermal enhancement. Pin 1 is marked by a dot; the substrate is connected to VEE1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN1 | Buffer 1 Input | High-impedance (500kΩ || 2pF) node accepting single-ended analog signals; no internal feedback path. |
| 2 OUT1 | Buffer 1 Output | 75Ω-terminated output driving coaxial cable; forms voltage divider reducing amplitude by 50% at load. |
| 3 VEE1 | Negative Supply for Buffer 1 | Independent negative rail connection; must be bypassed with 0.1μF capacitor near pin. |
| 4 VEE2 | Negative Supply for Buffer 2 | Separate negative supply pin for second buffer; allows independent biasing in split-rail configurations. |
| 5 IN2 | Buffer 2 Input | Electrically isolated input channel; matches IN1 in noise, bandwidth, and input impedance. |
| 6 OUT2 | Buffer 2 Output | Second 75Ω-terminated output; crosstalk <−65dB at 100MHz enables simultaneous dual-channel operation. |
| 7 VCC2 | Positive Supply for Buffer 2 | Dedicated positive rail for second buffer; decoupling required per supply pin. |
| 8 VCC1 | Positive Supply for Buffer 1 | Independent positive supply; enables asymmetric rail configurations (e.g., +5V/−3V) if needed. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 75Ω back-termination | Eliminates need for external resistors on both outputs, reducing BOM count and PCB area in video/RF layouts. |
| Open-loop architecture | Delivers constant 405ps group delay across 100kHz–1GHz, critical for phase-sensitive IF sampling and I/Q signal paths. |
| Capacitive-load stability | Drives up to 120pF without oscillation; maintains >720MHz bandwidth when paired with 10Ω isolation resistor. |
| Dual independent supplies | Separate VCC1/VEE1 and VCC2/VEE2 pins allow independent power sequencing and rail optimization per channel. |
| Low distortion at high frequency | −32dBc SFDR at 100MHz and −47dBc third-harmonic distortion at 500kHz enable clean signal integrity in wideband comms. |
Applications
| Video Signal Distribution | IF Signal Conditioning |
|---|---|
Use Scenario: Distributing composite NTSC/PAL video signals from a single source to multiple monitors or encoders over 75Ω coaxial cables. IC Role / Device Role / Timing Role: Dual-channel 75Ω line driver providing matched gain, phase, and drive strength for synchronized video paths. Use Value: Achieves 1.3% differential gain error and 0.15° differential phase error, preserving color fidelity without external calibration. |
Use Scenario: Buffering intermediate-frequency outputs (e.g., 70MHz, 140MHz) from mixers prior to ADC sampling in software-defined radios. IC Role / Device Role / Timing Role: High-bandwidth, low-phase-distortion buffer ensuring time-aligned I/Q sampling with minimal group delay variation. Use Value: 405ps group delay and 230MHz 0.1dB flatness maintain signal coherence across multi-MHz IF bandwidths. |
| Multi-Carrier Cable Modem Front-End | Dual-Channel DAC Output Driver |
Use Scenario: Driving upstream transmit paths in DOCSIS 3.1 cable modems where multiple carriers (5–42MHz) require simultaneous amplification into 75Ω plant. IC Role / Device Role / Timing Role: Dual open-loop buffer handling independent upstream channels with matched output impedance and gain flatness. Use Value: −32dBc SFDR at 100MHz suppresses intermodulation distortion between closely spaced upstream carriers. |
Use Scenario: Isolating and driving dual high-speed DAC outputs (e.g., AD9164) into 75Ω transmission lines for direct RF synthesis. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate buffer preserving DAC transient response and spectral purity. Use Value: 4200V/μs slew rate and 2.1nV/√Hz noise density prevent harmonic degradation and SNR loss in wideband DAC output stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel 75Ω line-driving applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4202ESA+ | Single-channel, SO-8 package; identical 75Ω termination and 720MHz bandwidth but half the channel count. | Requires two devices for dual-path designs; larger PCB footprint than μMAX-8. | Select when board space permits SO-8 and single-channel buffering suffices per signal path. |
| THS3202DGNR | Single-supply (±5V compatible), 1.8GHz bandwidth, no integrated termination; requires external 75Ω resistors. | Higher bandwidth but adds 4 passive components per channel and increases layout sensitivity. | Choose when >1GHz bandwidth is mandatory and external termination is acceptable for cost or flexibility reasons. |
Compared with MAX4202ESA+, the MAX4205EUA+ saves board area and simplifies layout via dual-channel integration in μMAX-8; compared with THS3202DGNR, it trades 460MHz bandwidth for guaranteed 75Ω matching, lower component count, and reduced layout risk in production video/RF systems.
Availability
The MAX4205EUA+ is available at Aetrix Electronics and suitable for video distribution systems, IF signal conditioning, cable modem front-ends, and dual-channel DAC output buffering requiring stable component supply across industrial temperature ranges (−40°C to +85°C).
Supply support for MAX4205EUA+ 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and RF solutions for communications, computing, and industrial markets.
The MAX4200–MAX4205 family was engineered specifically for ultra-high-speed open-loop buffering in video, RF, and data-communications systems where low group delay, precise impedance matching, and capacitive-load stability are critical.
FAQ
What is the operating supply voltage range for the MAX4205EUA+?
The MAX4205EUA+ operates from dual supplies ranging from ±4V to ±5.5V. It is fully specified at ±5V, drawing 2.2mA per buffer (4.4mA total) under those conditions. Operation outside this range may degrade bandwidth, output swing, or noise performance, and is not guaranteed by the manufacturer's specifications for MAX4205EUA+.
Does the MAX4205EUA+ require external compensation or feedback components?
No, the MAX4205EUA+ uses an open-loop architecture with no internal dominant pole, so it does not require external compensation capacitors or feedback networks. Its 75Ω termination resistors are integrated internally on both outputs, eliminating the need for external resistors in standard 75Ω line-driving configurations for MAX4205EUA+.
Can the MAX4205EUA+ drive capacitive loads, and what is the maximum stable value?
Yes, the MAX4205EUA+ is designed to drive capacitive loads without oscillation. It remains stable with up to 120pF load capacitance, though bandwidth decreases progressively with higher capacitance. For optimal AC performance, use a 10Ω isolation resistor in series with the output when driving >47pF, as documented in the MAX4205EUA+ typical application circuits.
What is the function of separate VCC1/VEE1 and VCC2/VEE2 pins on the MAX4205EUA+?
The MAX4205EUA+ features independent power pins for each buffer (VCC1/VEE1 for Buffer 1, VCC2/VEE2 for Buffer 2) to enable flexible biasing-such as different rail voltages or staggered power-up sequences-and reduce inter-channel supply coupling. This separation improves PSR and minimizes crosstalk, which is critical in sensitive dual-path RF or video applications using MAX4205EUA+.
How does the MAX4205EUA+ compare to the MAX4204EUA+ in terms of termination and application fit?
The MAX4205EUA+ integrates 75Ω back-termination resistors optimized for video and broadcast systems, whereas the MAX4204EUA+ uses 50Ω termination suited for data communications and wireless LANs. Both share identical μMAX-8 packaging, 720MHz bandwidth, and dual-channel architecture-but selecting MAX4205EUA+ ensures impedance match to 75Ω infrastructure without redesign.
MAX4205EUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- Buffer
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 4200V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 720 MHz
- Current - Input Bias:
- 800 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 2.2mA (x2 Channels)
- Current - Output / Channel:
- 44 mA
- Voltage - Supply Span (Min):
- 8 V
- Voltage - Supply Span (Max):
- 11 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX4205EUA+ FAQ
1.How can I place an order for MAX4205EUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4205EUA+ 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 MAX4205EUA+ reliable?
The price and inventory of MAX4205EUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4205EUA+ is usually 5 days.
3.What payment methods are accepted for MAX4205EUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4205EUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4205EUA+?
MAX4205EUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4205EUA+ 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 MAX4205EUA+?
For technical support, including MAX4205EUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4205EUA+ requirements.
6.How does Aetrix verify that MAX4205EUA+ is sourced from the original manufacturer or authorized distributors?
All MAX4205EUA+ 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 MAX4205EUA+ meets industry standards.
7.What is the process for return or replacement of MAX4205EUA+?
All MAX4205EUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4205EUA+, 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 MAX4205EUA+ part is unused and in its original packaging.
Return procedure for MAX4205EUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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