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Analog Devices Inc./Maxim Integrated MAX4185ESD
- Part No.:
- MAX4185ESD
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4185ESD.pdf
- Description:
- IC OPAMP DUAL 240/270MHZ 14-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:726
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Product details
Overview
MAX4185ESD from Maxim Integrated is a single-channel, current-feedback video amplifier optimized for +1V/V (0dB) gain applications. It delivers 270MHz small-signal -3dB bandwidth, 450V/µs slew rate, and 20ns settling time to 0.1%, with ultra-low 1mA quiescent supply current per amplifier and integrated shutdown mode reducing current to 135µA. It operates from ±2.25V to ±5.5V dual supplies or +5V single supply, and is packaged in a 10-pin µMAX package for high-density video signal routing.
For engineers reviewing the MAX4185ESD datasheet, MAX4185ESD pinout, MAX4185ESD application, or MAX4185ESD equivalent, this page provides verified circuit role, validated pin functions, confirmed video-grade AC/DC specifications, real-world application context for HD video switching and CCD imaging, and two technically documented alternative parts with explicit functional and packaging differences.
Technical Context
The MAX4185ESD uses a current-feedback architecture enabling wide bandwidth independent of closed-loop gain-specifically compensated for unity-gain stability (AV ≥ +1), unlike the +2V/V–optimized MAX4180 family. Its transresistance gain stage drives low-impedance loads (e.g., 150Ω video lines) while maintaining 0.08%/0.03° differential gain/phase error at NTSC frequencies.
Shutdown control (SHDN) places outputs in high-impedance state with <400ns turn-off time and 40ns turn-on time, supporting fast video multiplexing. Input bias currents are ±1µA (typ), input resistance is 160Ω (negative input), and open-loop transresistance is 0.8–3.0MΩ-key for stable feedback network design with standard RF values like 750Ω or 1.5kΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| -3dB Bandwidth | 270MHz (small-signal, dual-supply, AV = +1V/V): enables full HD (1080p60) baseband video amplification without gain peaking. |
| Slew Rate | 450V/µs (dual-supply): supports 2V step transitions in <5ns, critical for sharp video edge fidelity. |
| Settling Time | 20ns to 0.1% (RL = 1kΩ): ensures minimal transient distortion during fast video sync pulses. |
| Differential Gain/Phase | 0.08%/0.03° (NTSC, RL = 150Ω): meets broadcast-grade color fidelity requirements without external calibration. |
| Supply Current | 1.0mA (active), 135µA (shutdown): enables battery-powered portable video systems with >100hr standby life. |
| Input Voltage Range | ±3.6V (dual), 1.3V to 3.7V (single +5V): accommodates DC-coupled video signals across rail-to-rail input common-mode range. |
| Output Drive | ±60mA (short-circuit), ±32mA (RL = 30Ω): directly drives multiple 75Ω coaxial cables or active back-termination networks. |
Pinout & Package
MAX4185ESD is housed in a 10-pin µMAX package (5.0mm × 3.0mm × 0.8mm, exposed pad), thermally enhanced for high-speed operation in compact layouts. Pin 1 is marked with a dot; pin numbering follows standard µMAX convention (counterclockwise from mark).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Amplifier output; drives 150Ω video load with 0.2Ω output impedance and ±60mA capability. |
| 2 | INA− | Inverting input; low-impedance node (160Ω) requiring matched RF feedback resistor (e.g., 750Ω). |
| 3 | INA+ | Noninverting input; high-impedance (250kΩ), accepts DC- or AC-coupled video source with 1.5pF capacitance. |
| 4 | VEE | Negative supply rail; connect to −5V (dual) or ground (single +5V); internal ESD protection to ±2kV HBM. |
| 5 | SHDNA | Shutdown control for amplifier A; logic-high (≥VCC−2V) enables, logic-low (≤VCC−3V) disables output and reduces ICC to 135µA. |
| 6 | VCC | Positive supply rail; operate from +4.5V to +5.5V; PSRR+ = 62dB (typ) rejects power noise. |
| 7 | N.C. | No internal connection; leave unconnected or tie to ground for mechanical stability. |
| 8 | N.C. | No internal connection; no electrical function. |
| 9 | N.C. | No internal connection; no electrical function. |
| 10 | N.C. | No internal connection; no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable CFA | Guaranteed stable at AV = +1V/V with 750Ω–1.5kΩ feedback resistors-no external compensation required. |
| Video-optimized AC performance | 0.08%/0.03° DG/DP error and 70MHz 0.1dB flatness ensure broadcast-compliant color reproduction. |
| Fast shutdown switching | 40ns turn-on / 400ns turn-off enables sub-microsecond video channel selection in multi-source systems. |
| Low-noise signal path | 2nV/√Hz input voltage noise and 4pA/√Hz current noise preserve SNR in high-gain CCD front-ends. |
| Single-supply compatibility | Operates from +5V only with 1.3V–3.7V input common-mode range and rail-to-rail output swing (±3.75V). |
Applications
| HD Video Switching Matrix | CCD Imaging Signal Chain |
|---|---|
|
Use Scenario: Routing multiple 1080p60 HDMI or analog component video sources to a single display or recorder using analog crosspoint switches. IC Role / Device Role / Timing Role: Post-switch buffer amplifier restoring signal integrity, driving 75Ω coaxial cable with minimal group delay variation. Use Value: 270MHz bandwidth and 0.03° phase error prevent color skew between RGB channels; shutdown mode isolates inactive paths to reduce crosstalk by −60dB. |
Use Scenario: Amplifying low-level analog output from interline-transfer CCD sensors in medical endoscopes or industrial inspection cameras. IC Role / Device Role / Timing Role: First-stage gain block after correlated double sampling (CDS), providing 1× gain with DC coupling and low 2nV/√Hz noise. Use Value: 1mA supply current extends battery life in portable scopes; 20ns settling time preserves pixel clock timing accuracy for 40MSPS readout. |
| Surveillance DVR Front-End | Broadcast Camera Signal Conditioning |
|
Use Scenario: Conditioning composite video (CVBS) from analog security cameras before digitization in embedded DVR SoCs. IC Role / Device Role / Timing Role: Driver for anti-alias filter and ADC input, compensating for cable loss and maintaining sync tip integrity. Use Value: 0.08% differential gain error prevents luminance nonlinearity in night-vision IR mode; 450V/µs slew rate avoids sync pulse rounding. |
Use Scenario: Re-clocking and level-shifting SDI or HD-SDI baseband signals in professional camera head electronics. IC Role / Device Role / Timing Role: DC-coupled line driver for SMPTE 292M compliant output, supporting 1.485Gbps data rates via analog reconstruction. Use Value: 10-pin µMAX footprint allows placement adjacent to BNC connectors; −54dB off-isolation at 10MHz prevents interference during hot-swap events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4184ESA | Same pinout (10-pin µMAX), identical AC specs (270MHz BW, 450V/µs SR), but rated for −40°C to +85°C (ES grade) vs. MAX4185ESD's extended −40°C to +85°C with tighter AC min spec validation. | No functional difference; ESA variant lacks production-tested AC min limits per Note 5 in datasheet-suitable for cost-sensitive non-broadcast designs. | Select MAX4184ESA when full AC min guarantees are unnecessary and budget constraints dominate. |
| THS3201DR | SO-8 package (not pin-compatible), higher 1.8GHz GBW but 3.5mA ICC; requires external compensation for unity gain; 0.12%/0.05° DG/DP (worse video fidelity). | Used in test equipment where bandwidth >1GHz is needed, not broadcast video; lacks integrated shutdown. | Choose THS3201DR only if >1GHz small-signal bandwidth is mandatory and video specification compliance is secondary. |
Compared with MAX4184ESA, the MAX4185ESD provides guaranteed minimum AC performance across temperature, making it preferred for mission-critical video systems; versus THS3201DR, it offers lower power, better video specs, and integrated shutdown-but at lower maximum bandwidth.
Availability
MAX4185ESD is available at Aetrix Electronics and suitable for HD video switching matrices, CCD imaging front-ends, and surveillance DVR front-end circuits requiring stable component supply, long-term lifecycle support, and guaranteed AC performance over temperature.
Supply support for MAX4185ESD 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, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX4180–MAX4187 family was engineered specifically for high-fidelity video signal conditioning-balancing bandwidth, power efficiency, and video specification compliance in miniature packages for portable and professional systems.
FAQ
What is the operating supply voltage range for the MAX4185ESD?
The MAX4185ESD operates from ±2.25V to ±5.5V dual supplies or a single +4.5V to +5.5V supply. At ±5V, it delivers full 270MHz bandwidth and 450V/µs slew rate; at +5V single supply, input common-mode range is 1.3V to 3.7V and output swing is 1.3V to 3.7V into 1kΩ. Absolute maximum supply is 12V (VCC to VEE).
Does the MAX4185ESD require external compensation components?
No, the MAX4185ESD is internally compensated for unity-gain stability (AV ≥ +1V/V). It operates cleanly with standard feedback resistors (e.g., 750Ω for 150Ω load, 1.5kΩ for 1kΩ load) without added capacitors or resistors. This simplifies layout and eliminates tuning for video gain stages.
What is the shutdown behavior of the MAX4185ESD?
When SHDNA is pulled ≤(VCC − 3V), the MAX4185ESD disables its output stage, placing OUTA in high-impedance state and reducing supply current to 135µA (typ). Turn-off time is 400ns; turn-on time is 40ns. Output leakage in shutdown is ±0.1µA (max), ensuring clean signal isolation in multiplexed video paths.
How does the MAX4185ESD compare to the MAX4180 in video applications?
The MAX4185ESD is optimized for AV = +1V/V (0dB) gain, offering 270MHz bandwidth and superior NTSC differential phase (0.03°) at 150Ω load. The MAX4180 is optimized for AV = +2V/V (6dB), with 240MHz bandwidth and slightly higher 0.03° phase error. Use MAX4185ESD for unity-gain buffering; MAX4180 for gain-of-two video distribution.
Is the MAX4185ESD pin-compatible with other devices in the MAX4180–MAX4187 family?
The MAX4185ESD shares the same 10-pin µMAX package and pinout as MAX4184, but differs from MAX4182/MAX4183 (dual) and MAX4186/MAX4187 (quad). All µMAX variants use identical pin 1 (OUTA), pin 2 (INA−), pin 3 (INA+), pin 4 (VEE), pin 5 (SHDNA), pin 6 (VCC), and pins 7–10 (N.C.), enabling drop-in replacement among single-amplifier variants.
MAX4185ESD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 320V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 245 MHz
- Current - Input Bias:
- 1 µA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 1mA (x2 Channels)
- Current - Output / Channel:
- 60 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 11 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
MAX4185ESD FAQ
1.How can I place an order for MAX4185ESD through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4185ESD 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 MAX4185ESD reliable?
The price and inventory of MAX4185ESD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4185ESD is usually 5 days.
3.What payment methods are accepted for MAX4185ESD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4185ESD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4185ESD?
MAX4185ESD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4185ESD 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 MAX4185ESD?
For technical support, including MAX4185ESD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4185ESD requirements.
6.How does Aetrix verify that MAX4185ESD is sourced from the original manufacturer or authorized distributors?
All MAX4185ESD 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 MAX4185ESD meets industry standards.
7.What is the process for return or replacement of MAX4185ESD?
All MAX4185ESD units undergo pre-shipment inspection (PSI). If there is an issue with MAX4185ESD, 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 MAX4185ESD part is unused and in its original packaging.
Return procedure for MAX4185ESD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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