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Analog Devices Inc./Maxim Integrated MAX4218ESD
- Part No.:
- MAX4218ESD
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4218ESD.pdf
- Description:
- IC OPAMP VFB 3 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,603
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Product details
Overview
MAX4218ESD from Maxim Integrated is a high-speed, single-supply, closed-loop rail-to-rail buffer with fixed gain of +2V/V or −1V/V, designed for video line driving and ADC interface applications. It delivers 230MHz −3dB bandwidth, 600V/µs slew rate, ±120mA output drive, and operates from 3.15V to 11V single supply (or ±1.575V to ±5.5V dual supply). Its input common-mode range extends 100mV beyond VEE, and output swings rail-to-rail under 2kΩ load.
For engineers reviewing the MAX4218ESD datasheet, MAX4218ESD pinout, MAX4218ESD application, or MAX4218ESD equivalent, key selection criteria include guaranteed −3dB bandwidth at 230MHz, rail-to-rail output swing with <60mV headroom, low 0.03% differential gain / 0.04° phase error for NTSC video, shutdown current of 400µA (when enabled), and compatibility with 50Ω/75Ω video termination schemes.
Technical Context
The MAX4218ESD employs voltage-feedback architecture with internal 500Ω precision resistors to fix closed-loop gain at +2V/V (noninverting) or −1V/V (inverting), eliminating external gain-setting components. Local feedback around the output stage ensures low output impedance (<200mΩ at 10MHz) and demand-driven bias for high-current drive without increasing quiescent current beyond 5.5mA per buffer.
It integrates input protection via five back-to-back Schottky diodes between IN+ and IN−, enabling robust operation with large differential input voltages. The enable input (EN_) controls power-down mode, reducing supply current to 400µA while raising disabled output resistance to 1kΩ (500Ω under overvoltage conditions).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (−3dB) | 230MHz - supports full NTSC/PAL video bandwidth and high-speed data acquisition sampling clocks |
| Slew Rate | 600V/µs - enables clean 2VP-P pulse response with <1ns rise/fall time into 100Ω |
| Output Drive | ±120mA - drives 50Ω coaxial cables directly or sustains 150Ω loads at full swing |
| Supply Current | 5.5mA (active), 400µA (shutdown) - enables low-power portable instrumentation operation |
| Differential Error | 0.03% DG / 0.04° DP - meets broadcast-grade video fidelity requirements per NTSC standard |
| Noise Density | 10nV/√Hz (voltage), 1.3pA/√Hz (current) - preserves SNR in high-gain analog front-ends |
| Input Range | VEE −100mV to VCC −2.25V - supports ground-sensing inputs in single-supply 3.3V systems |
Pinout & Package
MAX4218ESD is housed in a 14-pin SO (Small Outline) package with exposed pad for thermal performance. Pin assignment follows standard SO layout with VEE (pin 1), IN− (pin 2), IN+ (pin 3), EN (pin 4), VCC (pin 5), OUT (pin 6), and no-connect (N.C.) pins at positions 7, 8, 13, and 14.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VEE) | Negative supply or ground reference | Reference for input common-mode range extension (VEE −100mV); must be bypassed with 0.1µF capacitor |
| 2 (IN−) | Inverting input terminal | 500Ω input impedance; used for −1V/V gain configuration or termination in 50Ω/75Ω systems |
| 3 (IN+) | Noninverting input terminal | High-impedance node; used for +2V/V gain when IN− grounded; protected by Schottky clamps |
| 4 (EN) | Enable control input | Active-high logic; pulls supply current to 400µA when driven to VEE; requires series resistor if sinking >10µA |
| 5 (VCC) | Positive supply input | Accepts 3.15V–11V single supply; bypassing critical for stability above 100MHz |
| 6 (OUT) | Buffer output | Rail-to-rail capable; drives ±120mA; output impedance <200mΩ at DC, rising to ~10Ω at 100MHz |
| 7, 8, 13, 14 (N.C.) | No internal connection | Must be left floating or tied to ground; not bonded internally; no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Fixed closed-loop gain | Internal 500Ω resistors set precise +2V/V or −1V/V gain-no external components required, eliminating gain drift and layout sensitivity |
| Rail-to-rail output swing | Drives within 60mV of VCC/VEE into 2kΩ-enables full dynamic range utilization in 3.3V and 5V systems without level-shifting |
| Low distortion at 5MHz | −72dBc SFDR and −71dB THD-preserves signal integrity in CCD imaging and high-fidelity video routing |
| Video-optimized error performance | 0.03% differential gain / 0.04° differential phase-meets SMPTE/NTSC broadcast specifications for composite video |
| Capacitive load tolerance | Stable with up to 20pF load capacitance-supports direct connection to PCB traces and short cable runs without isolation resistor |
Applications
| Battery-Powered Instruments | Video Line Drivers |
|---|---|
Use Scenario: Portable oscilloscope front-end amplification and signal conditioning in handheld test equipment. IC Role / Device Role / Timing Role: Precision buffer isolating high-impedance probe input from ADC input stage while maintaining bandwidth and low noise. Use Value: 5.5mA quiescent current extends battery life; rail-to-rail swing maximizes ADC utilization; 230MHz bandwidth captures fast transients. | Use Scenario: Driving 75Ω coaxial video lines in broadcast switchers and distribution amplifiers. IC Role / Device Role / Timing Role: Gain-of-2 video buffer with matched differential gain/phase for NTSC/PAL signal integrity. Use Value: 0.03%/0.04° error meets SMPTE RP 168; ±120mA drive sustains 150Ω termination; low 10nV/√Hz noise preserves SNR. |
| Analog-to-Digital Converter Interface | CCD Imaging Systems |
Use Scenario: Driving multiplexed ADC inputs in medical imaging and industrial DAQ systems. IC Role / Device Role / Timing Role: High-speed unity-gain stable buffer providing low-output-impedance source for SAR or pipeline ADC sample-and-hold. Use Value: 600V/µs slew rate prevents settling errors at multi-MSPS sampling rates; 230MHz bandwidth supports >100MHz input signals. | Use Scenario: Output buffering of CCD sensor analog outputs prior to correlated double sampling. IC Role / Device Role / Timing Role: Low-noise, low-distortion buffer preserving pixel-level signal fidelity during analog signal chain transmission. Use Value: 1.3pA/√Hz current noise minimizes dark-current-induced errors; −72dBc SFDR maintains image contrast resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed rail-to-rail buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4219ESD | Triple-channel version in same 14-pin SO package; shares identical per-channel specs (230MHz, 600V/µs, 0.03%/0.04°) | Used where space-constrained multi-channel video routing or parallel ADC channel buffering is required | Select MAX4219ESD only when three synchronized buffers are needed; pinout differs-requires redesign of enable and output routing |
| THS3201DGN | Higher 1.8GHz bandwidth and 6000V/µs slew rate but higher 12.5mA supply current; no integrated gain resistors or enable feature | Suitable for RF IF amplification or ultra-high-speed pulse applications-not optimized for video differential error or low-power operation | Choose THS3201DGN only for >500MHz signal paths; MAX4218ESD remains preferred for video fidelity, power efficiency, and ease of use |
Compared with MAX4219ESD, MAX4218ESD offers simpler single-channel integration and lower system-level power; versus THS3201DGN, it trades raw speed for guaranteed video-grade linearity, integrated gain, and 400µA shutdown-making it optimal for portable video and precision instrumentation.
Availability
MAX4218ESD is available at Aetrix Electronics and suitable for video line drivers, analog-to-digital converter interface circuits, and CCD imaging systems requiring stable component supply, long-term manufacturability, and guaranteed parametric performance across −40°C to +85°C.
Supply support for MAX4218ESD 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.
The MAX421x family was engineered specifically for high-fidelity video signal conditioning and low-voltage, high-bandwidth analog interfacing-emphasizing rail-to-rail operation, minimal differential distortion, and integrated closed-loop gain.
FAQ
What is the operating supply voltage range for MAX4218ESD?
The MAX4218ESD operates from a single 3.15V to 11V supply or dual ±1.575V to ±5.5V supplies. At 3.3V single supply, it maintains full 230MHz bandwidth and rail-to-rail output swing. Input common-mode range extends to VEE −100mV, supporting ground-referenced inputs. The MAX4218ESD is fully specified across −40°C to +85°C ambient temperature.
Does MAX4218ESD support both inverting and noninverting gain configurations?
Yes, the MAX4218ESD supports fixed closed-loop gains of +2V/V (noninverting) and −1V/V (inverting) using internal 500Ω precision resistors. For +2V/V, ground the IN− pin and apply signal to IN+. For −1V/V, ground the IN+ pin and apply signal to IN−. The inverting input presents 500Ω impedance-terminate with 56Ω (50Ω systems) or 88Ω (75Ω systems) for optimal matching. The MAX4218ESD requires no external resistors to set gain.
What is the shutdown behavior of MAX4218ESD?
When the EN pin is driven to VEE, the MAX4218ESD enters shutdown mode, reducing quiescent supply current to 400µA per buffer. Output becomes high-impedance (1kΩ typical disabled output resistance), and input protection diodes remain active. Enable/disable transition times are 100ns (turn-on) and 1µs (turn-off). The MAX4218ESD does not require external pull-up/down on EN; logic thresholds are VIL ≤ 0.8V and VIH ≥ 2.0V (at VCC = 5V).
Can MAX4218ESD drive 75Ω video loads directly?
Yes, the MAX4218ESD can directly drive 75Ω video loads with full rail-to-rail swing and guaranteed 0.03% differential gain / 0.04° phase error-meeting NTSC broadcast standards. For optimal performance, terminate the input with 88Ω when configured for inverting gain, and match output to cable impedance. The MAX4218ESD delivers ±120mA output current, sustaining 150Ω loads at full swing and 75Ω loads with minor reduction in peak-to-peak voltage.
Is MAX4218ESD pin-compatible with other devices in the MAX421x family?
No, MAX4218ESD is not pin-compatible with other MAX421x variants. It is a single-channel device in 14-pin SO, whereas MAX4214 uses SOT23-5, MAX4215 uses 8-pin µMAX/SO, and MAX4219 is triple-channel in the same 14-pin SO but with different pin assignments (e.g., multiple EN/OUT pins). The MAX4218ESD has dedicated N.C. pins (7, 8, 13, 14) and unique EN placement (pin 4); substituting other variants requires PCB redesign.
MAX4218ESD 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:
- Voltage Feedback
- Number of Circuits:
- 3
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 600V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 200 MHz
- Current - Input Bias:
- 5.4 µA
- Voltage - Input Offset:
- 4 mV
- Current - Supply:
- 5.5mA (x3 Channels)
- Current - Output / Channel:
- 120 mA
- Voltage - Supply Span (Min):
- 3.15 V
- Voltage - Supply Span (Max):
- 11 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
MAX4218ESD FAQ
1.How can I place an order for MAX4218ESD through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4218ESD 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 MAX4218ESD reliable?
The price and inventory of MAX4218ESD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4218ESD is usually 5 days.
3.What payment methods are accepted for MAX4218ESD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4218ESD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4218ESD?
MAX4218ESD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4218ESD 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 MAX4218ESD?
For technical support, including MAX4218ESD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4218ESD requirements.
6.How does Aetrix verify that MAX4218ESD is sourced from the original manufacturer or authorized distributors?
All MAX4218ESD 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 MAX4218ESD meets industry standards.
7.What is the process for return or replacement of MAX4218ESD?
All MAX4218ESD units undergo pre-shipment inspection (PSI). If there is an issue with MAX4218ESD, 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 MAX4218ESD part is unused and in its original packaging.
Return procedure for MAX4218ESD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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