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Analog Devices Inc./Maxim Integrated MAX477EPA
- Part No.:
- MAX477EPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX477EPA.pdf
- Description:
- IC OPAMP 300MHZ HIGH-SPEED 8-DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,795
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Product details
Overview
The MAX477EPA from Maxim Integrated is a ±5V, unity-gain-stable, voltage-feedback operational amplifier optimized for high-speed video and RF signal conditioning. It delivers 300MHz -3dB bandwidth, 1100V/µs slew rate, 0.01°/0.01% differential phase/gain error, and drives 75Ω coaxial cables directly - making it ideal for broadcast video routing and precision DAC/ADC buffering.
For engineers reviewing the MAX477EPA datasheet, MAX477EPA pinout, MAX477EPA application, or MAX477EPA equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions for DIP-8 layout, and two confirmed alternative op amps with documented functional trade-offs in video driver and high-fidelity analog signal path use cases.
Technical Context
The MAX477EPA uses a hybrid voltage-feedback architecture that retains dual high-impedance inputs and resistor-independent compensation while achieving current-feedback-class speed: its 1100V/µs slew rate enables 200MHz full-power bandwidth at ±2Vp-p output into 100Ω, and its 130MHz 0.1dB gain flatness ensures minimal amplitude distortion across HD video baseband.
Unlike standard voltage-feedback op amps, the MAX477EPA's large-signal response is not limited by internal current sources - enabling stable operation driving 100pF capacitive loads without oscillation and delivering ±3.9V output swing into 50Ω at ±5V supplies, with 8000V HBM ESD protection on all pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| -3dB Bandwidth | 300MHz at AV = +1 - supports full NTSC/PAL/HD-SDI baseband without attenuation |
| Slew Rate | 1100V/µs - enables clean 2Vp-p step response in <12ns, critical for fast video transitions |
| Differential Gain/Phase Error | 0.01%/0.01° at 3.58MHz - meets broadcast-grade color fidelity requirements |
| Input Voltage Noise | 5nV/√Hz - preserves SNR in low-level signal amplification before ADC sampling |
| Output Drive | ±3.9V into 50Ω - directly interfaces with 50Ω/75Ω transmission lines without external buffers |
| Quiescent Current | 8mA - balances high-speed performance with thermal manageability in multi-channel systems |
| ESD Protection | 8000V HBM - safeguards against handling damage during PCB assembly and system integration |
Pinout & Package
MAX477EPA is housed in an 8-pin plastic DIP package (0.300" wide), compatible with through-hole prototyping and industrial PCB layouts. Pin spacing follows JEDEC MS-001 standard.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives 50Ω/75Ω loads directly; requires 0.1µF bypass capacitor to VEE near pin |
| 2 | IN− | Inverting input - high-impedance node; sensitive to parasitic capacitance; keep trace short and guarded |
| 3 | IN+ | Noninverting input - high-impedance node; reference point for DC biasing in single-supply configurations |
| 4 | VEE | Negative supply rail (−5V) - connect to low-inductance ground plane; decouple with 0.1µF ceramic + 10µF tantalum |
| 5 | VCC | Positive supply rail (+5V) - same decoupling as VEE; avoid shared traces with digital power |
| 6 | N.C. | No internal connection - leave unconnected; do not tie to ground or supply |
| 7 | N.C. | No internal connection - leave unconnected; no routing or via required |
| 8 | N.C. | No internal connection - leave unconnected; maintains DIP-8 mechanical symmetry |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-feedback topology with CMF speed | Enables standard gain-setting resistor networks (e.g., 500Ω feedback) while delivering 1100V/µs slew - eliminates CMF's single high-Z input limitation |
| 100pF capacitive load drive | Stable operation without oscillation into 100pF - supports direct connection to ADC input capacitance or long PCB traces without isolation resistors |
| Low distortion at video frequencies | −74dBc SFDR and −58dB THD at 10MHz - preserves chroma/luma separation in composite video distribution |
| High output current capability | 150mA short-circuit limit and ±3.9V swing into 50Ω - drives multiple 75Ω video loads in parallel (up to six at ±2Vp-p) |
| Robust ESD and thermal protection | 8000V HBM rating and internal thermal shutdown - survives handling, cable hot-plug, and sustained overload in field-deployed equipment |
Applications
| Broadcast Video Routing | Medical Ultrasound Signal Chain |
|---|---|
Use Scenario: Switching and distributing composite NTSC/PAL signals between camera feeds, monitors, and recorders in studio environments. IC Role / Device Role / Timing Role: Unity-gain buffer and line driver placed immediately after video switch matrix output to maintain impedance match and minimize reflections. Use Value: 0.01°/0.01% differential phase/gain error preserves color accuracy across 100m 75Ω coax runs; 300MHz bandwidth passes third-harmonic of 4.43MHz PAL subcarrier. |
Use Scenario: Conditioning analog RF echo signals from ultrasound transducer arrays prior to digitization at 40–100Msps. IC Role / Device Role / Timing Role: Low-noise, high-bandwidth preamplifier stage between transducer front-end and flash ADC input. Use Value: 5nV/√Hz input voltage noise and 200MHz full-power bandwidth preserve time-of-flight resolution; ±3.9V swing drives 50Ω ADC inputs without level-shifting. |
| Precision DAC Output Buffer | High-Speed Data Acquisition Front-End |
Use Scenario: Isolating high-resolution DAC outputs (e.g., 16-bit, 100ksps) from varying load impedances in automated test equipment. IC Role / Device Role / Timing Role: Unity-gain follower providing low-output-impedance drive while rejecting supply noise from digital sections. Use Value: 90dB PSRR at DC and 70dB at 1MHz suppresses digital switching noise; 0.5mV max VOS avoids introducing static offset errors into calibrated measurement paths. |
Use Scenario: Driving multiplexed analog inputs of simultaneous-sampling ADCs in oscilloscopes or spectrum analyzers. IC Role / Device Role / Timing Role: High-slew-rate buffer ensuring fast settling (<12ns) after channel switching to prevent inter-channel crosstalk. Use Value: 1100V/µs slew rate achieves 0.01% settling in 10ns for 2V steps; 130MHz 0.1dB gain flatness maintains amplitude integrity across 10MHz acquisition bandwidth. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8001ARZ | Higher 1.5GHz GBW but 1.25mA quiescent current; 2.5mV VOS; no guaranteed 100pF capacitive load stability | Better for GHz-range small-signal amplification; less suitable for precision video where DC offset and load stability matter | Select AD8001ARZ when bandwidth >1GHz is required and DC accuracy is secondary |
| LMH6702MF/NOPB | 1.7GHz GBW, 3.5mA IQ, 1.5mV VOS; specified for 50pF load only; no differential phase/gain data | Optimized for RF IF stages; lacks broadcast video characterization and 75Ω drive validation | Select LMH6702MF/NOPB for RF/IF gain blocks where video fidelity metrics are irrelevant |
Compared with MAX477EPA, AD8001ARZ trades lower DC precision and unverified capacitive load stability for higher small-signal bandwidth, while LMH6702MF/NOPB offers greater raw speed but omits video-specific error specifications and robust 75Ω drive validation - making MAX477EPA the only choice when broadcast-grade differential gain/phase and guaranteed 100pF stability are mandatory.
Availability
MAX477EPA is available at Aetrix Electronics and suitable for broadcast video routing, medical ultrasound signal conditioning, precision DAC buffering, high-speed data acquisition front-ends, and RF cable driver applications requiring stable component supply across extended production lifecycles.
Supply support for MAX477EPA 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) designs precision analog and mixed-signal ICs for demanding industrial, medical, and communications applications, with emphasis on high-performance, low-power, and robust reliability.
The MAX477EPA belongs to Maxim's high-speed video op amp product line, engineered specifically for broadcast, medical imaging, and instrumentation systems where signal fidelity, timing accuracy, and interface compatibility with 50Ω/75Ω infrastructure are non-negotiable.
FAQ
What is the maximum capacitive load the MAX477EPA can drive without oscillation?
The MAX477EPA is characterized to drive up to 100pF capacitive loads without oscillation under standard test conditions (±5V supplies, unity-gain configuration). This capability is verified in the datasheet's Typical Operating Characteristics section (Figure 4), and enables direct interfacing with ADC input capacitance or long PCB traces. For loads exceeding 100pF, an isolation resistor (e.g., 20Ω) is recommended per Figure 5. The MAX477EPA's internal compensation ensures stability where many general-purpose op amps would ring or oscillate.
Does the MAX477EPA support single-supply operation?
The MAX477EPA is specified for dual ±5V operation and is not characterized for true single-supply use. Its input common-mode range extends to ±3.5V (with ±5V supplies), and output swing reaches ±3.9V - both requiring negative rail headroom. While it may function with asymmetric supplies (e.g., +5V/0V), performance degrades: CMRR drops, output swing compresses, and distortion increases. For single-supply video applications, Maxim recommends alternatives like the MAX4200 or MAX4452, which are explicitly designed for rail-to-rail input/output and 3.3V/5V operation.
What is the purpose of the three N.C. pins on the MAX477EPA DIP-8 package?
Pins 6, 7, and 8 on the MAX477EPA DIP-8 package are No Connect (N.C.) - they have no internal silicon connection and serve only mechanical and packaging purposes. They maintain pin count symmetry with other variants (e.g., SO-8, µMAX-8) and ensure consistent PCB footprint reuse. These pins must remain unconnected - tying them to ground, supply, or signals risks parasitic coupling or unintended current paths. The datasheet explicitly states "N.C. Not internally connected" in the Pin Description table, confirming zero electrical function.
How does the MAX477EPA achieve both high slew rate and low input bias current?
The MAX477EPA achieves 1100V/µs slew rate and 2µA max input bias current simultaneously through a proprietary input stage that decouples gain-setting transconductance from output-stage drive capability. Unlike current-feedback amplifiers - which sacrifice input impedance for speed - the MAX477EPA retains dual high-Z inputs while using a high-current output stage buffered from the input differential pair. This architecture is detailed in the "Detailed Description" section of the datasheet, where it contrasts the MAX477EPA's voltage-feedback flexibility with CMF limitations. Measured IB remains ≤2µA across temperature (−40°C to +85°C), verified in Figure 19.
Can the MAX477EPA be used as a voltage follower for 75Ω video distribution?
Yes - the MAX477EPA is routinely used as a unity-gain voltage follower to drive 75Ω video loads, as shown in the "High-Performance Video Distribution Amplifier" application circuit (Figure 8). Its 300MHz bandwidth, 0.01°/0.01% differential phase/gain error, and ±3.9V output swing into 50Ω (derated to ±2.5V into 75Ω) meet SMPTE 259M and ITU-R BT.601 requirements. Layout best practices include microstrip routing, ground-plane continuity, and avoiding sockets or wire-wrap - all detailed in the "Applications Information" section. The MAX477EPA's ability to drive 100pF loads also accommodates typical cable capacitance and connector parasitics.
MAX477EPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1100V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- -
- Current - Input Bias:
- -
- Voltage - Input Offset:
- -
- Current - Supply:
- -
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- -
- Voltage - Supply Span (Max):
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX477EPA FAQ
1.How can I place an order for MAX477EPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX477EPA 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 MAX477EPA reliable?
The price and inventory of MAX477EPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX477EPA is usually 5 days.
3.What payment methods are accepted for MAX477EPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX477EPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX477EPA?
MAX477EPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX477EPA 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 MAX477EPA?
For technical support, including MAX477EPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX477EPA requirements.
6.How does Aetrix verify that MAX477EPA is sourced from the original manufacturer or authorized distributors?
All MAX477EPA 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 MAX477EPA meets industry standards.
7.What is the process for return or replacement of MAX477EPA?
All MAX477EPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX477EPA, 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 MAX477EPA part is unused and in its original packaging.
Return procedure for MAX477EPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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