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Analog Devices Inc./Maxim Integrated MAX4265ESA+
- Part No.:
- MAX4265ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4265ESA+.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,068
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Product details
Overview
MAX4265ESA+ from Maxim Integrated is a single-channel, unity-gain stable, ultra-low-distortion voltage-feedback operational amplifier optimized for high-frequency signal conditioning. It delivers 400MHz small-signal bandwidth, -90dBc SFDR at 5MHz (100Ω load), 900V/µs slew rate, and 8nV/√Hz input voltage noise density while operating from +4.5V to +8.0V single supply. It is engineered for high-speed ADC driver and IF amplifier applications in telecom infrastructure.
For engineers reviewing the MAX4265ESA+ datasheet, MAX4265ESA+ pinout, MAX4265ESA+ application, or MAX4265ESA+ equivalent, key selection criteria include its 400MHz unity-gain bandwidth, disable-mode high-impedance output state, 100Ω load drive capability, and guaranteed distortion performance up to 100MHz - critical for RF signal chain integrity and high-resolution data acquisition systems.
Technical Context
The MAX4265ESA+ employs proprietary bipolar process technology to achieve ultra-low harmonic distortion in low-voltage, single-supply operation - a trait uncommon among unity-gain stable op amps. Its internal compensation ensures stability at AV = +1V/V without external components, while maintaining 270MHz full-power bandwidth into 1Vp-p swing.
It features an active-low DISABLE pin that reduces quiescent current to 1.6mA per amplifier and places the output in high-impedance mode with 100ns enable time and 750µs disable time. Input common-mode range extends from (VEE + 1.6V) to (VCC – 1.6V), and output swing reaches within 1.1V of each rail under 100Ω load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal BW (-3dB) | 400MHz at AV = +1V/V - enables baseband-to-IF amplification up to UHF without gain peaking. |
| SFDR @ 5MHz | -90dBc into 100Ω - ensures minimal spurious content when driving 14–16-bit ADCs at intermediate frequencies. |
| Slew Rate | 900V/µs - supports clean 1Vp-p step response with <15ns 0.1% settling time, critical for pulse fidelity. |
| Input Voltage Noise | 8nV/√Hz at 1kHz - preserves SNR in wideband receiver front-ends and precision buffer stages. |
| Output Drive | ±45mA into 100Ω - sustains linearity while driving terminated coaxial cables or ADC input networks. |
| Disable Current | 1.6mA per amplifier - reduces system power by >95% during idle cycles in time-multiplexed signal paths. |
| Supply Range | +4.5V to +8.0V single supply - compatible with standard 5V and 3.3V logic rails via LDO regulation. |
Pinout & Package
The MAX4265ESA+ is housed in an 8-pin µMAX® package (pin-compatible with SO-8), measuring 3mm × 3mm with exposed thermal pad. This space-constrained封装 supports high-density RF and mixed-signal PCB layouts while enabling efficient heat dissipation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DISABLE | Active-low enable control; tie to VCC for normal operation, or ground to place output in high-Z state. |
| 2 | IN- | Inverting input; differential pair input node with 40kΩ differential resistance and 2pF capacitance. |
| 3 | IN+ | Noninverting input; common-mode range extends 1.6V beyond rails, supporting rail-to-rail input signal capture. |
| 4 | VEE | Negative supply terminal; connect to ground in single-supply configuration. |
| 5 | VEE | Second ground connection; improves PSRR and reduces ground bounce in high-speed switching. |
| 6 | OUT | Amplifier output; capable of ±45mA sourcing/sinking into 100Ω load with <1.1V headroom to rails. |
| 7 | VCC | Positive supply input; requires local 1nF + 0.1µF ceramic bypassing due to 400MHz bandwidth sensitivity. |
| 8 | NC | No internal connection; electrically isolated - may be left floating or tied to ground for mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stability | Internally compensated for AV ≥ +1V/V - eliminates need for external compensation in buffer and gain-of-one configurations. |
| Ultra-low distortion | -90dBc SFDR at 5MHz and -47dBc at 100MHz into 100Ω - maintains spectral purity for wideband modulation schemes. |
| High-speed disable | 100ns enable / 750µs disable timing - enables precise gating in TDD systems and time-interleaved sampling architectures. |
| Rail-compatible I/O | Input CMVR: (VEE + 1.6V) to (VCC – 1.6V); output swing to within 1.1V of rails - simplifies level-shifting in 5V systems. |
| Low-noise architecture | 8nV/√Hz voltage noise + 1pA/√Hz current noise - minimizes added noise floor in low-level signal amplification chains. |
Applications
| Base-Station IF Amplifier | High-Speed ADC Driver |
|---|---|
Use Scenario: Amplifying 70–140MHz IF signals in LTE/FDD/TDD basestation transceivers prior to digitization. IC Role / Device Role / Timing Role: Low-distortion gain block providing fixed +1V/V buffering with minimal group delay variation across channel bandwidth. Use Value: -90dBc SFDR at 5MHz and -47dBc at 100MHz ensures adjacent-channel leakage ratio (ACLR) compliance without post-processing correction. | Use Scenario: Driving the switched-capacitor input of a 125MSPS, 16-bit pipeline ADC in software-defined radio receivers. IC Role / Device Role / Timing Role: High-slew-rate buffer delivering fast charge/discharge current to ADC sampling capacitor with sub-15ns settling. Use Value: 900V/µs slew rate and ±45mA output drive maintain 0.1% settling accuracy even with 10pF+ ADC input capacitance. |
| RF Telecom Line Driver | High-Frequency Signal Generator Output Stage |
Use Scenario: Transmitting conditioned IF signals over 50Ω coaxial traces to upconverters or antenna interface modules. IC Role / Device Role / Timing Role: Single-ended line driver with matched 100Ω output impedance and low group delay ripple. Use Value: 400MHz bandwidth and 100Ω load compatibility eliminate external matching networks, reducing BOM count and layout area. | Use Scenario: Final-stage amplification of synthesized waveforms (e.g., QAM, OFDM) in lab-grade arbitrary waveform generators. IC Role / Device Role / Timing Role: Wideband output buffer isolating DAC core from reactive loads while preserving phase coherence. Use Value: 8nV/√Hz input noise and <0.015% differential gain error ensure EVM <1.5% at 64-QAM, 20MHz 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 only -68dBc SFDR at 5MHz; no disable function; SO-8 package. | Preferred for DC-coupled video or general-purpose high-speed gain blocks where ultra-low distortion is secondary. | Select AD8001ARZ if bandwidth >1GHz is required and SFDR >-85dBc is not mandatory. |
| LMH6629MA/NOPB | Lower 1.5nV/√Hz noise, -82dBc SFDR at 5MHz, no disable pin, 8-pin SOIC package. | Better suited for low-noise preamp stages preceding ADCs where power-down sequencing is unnecessary. | Choose LMH6629MA/NOPB when optimizing for lowest possible input-referred noise rather than SFDR-limited dynamic range. |
Compared with AD8001ARZ and LMH6629MA/NOPB, the MAX4265ESA+ uniquely balances 400MHz unity-gain bandwidth, -90dBc SFDR, and integrated disable functionality - making it the only option among the three qualified for time-gated, distortion-critical ADC driver roles in 5G infrastructure equipment.
Availability
MAX4265ESA+ is available at Aetrix Electronics and suitable for base-station IF amplifiers, high-speed ADC drivers, RF telecom line drivers, and high-frequency signal generator output stages requiring stable component supply across extended production lifecycles.
Supply support for MAX4265ESA+ 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 high-speed ICs for communications, computing, and industrial applications.
The MAX4265–MAX4270 family was developed specifically for ultra-low-distortion, wideband signal conditioning in 5G infrastructure, test equipment, and high-fidelity data acquisition - emphasizing SFDR, disable control, and 100Ω load drive.
FAQ
What is the maximum operating frequency for stable unity-gain operation of the MAX4265ESA+?
The MAX4265ESA+ is internally compensated for unity-gain stability and maintains flat, non-peaking response up to 400MHz small-signal bandwidth (–3dB point) with AV = +1V/V. Its full-power bandwidth is 270MHz into 1Vp-p, confirming stable large-signal operation through UHF bands. Stability is verified per datasheet Figure 7 (small-signal gain vs. frequency) and Table 3 AC specifications.
Does the MAX4265ESA+ support dual-supply operation, and what are the limits?
Yes, the MAX4265ESA+ operates from dual supplies of ±2.25V to ±4.0V, with absolute maximum supply voltage (VCC to VEE) limited to +8.5V. For example, ±3.3V or +5V/–3V configurations are valid. The input common-mode range remains (VEE + 1.6V) to (VCC – 1.6V), and output swing retains rail proximity - enabling flexible biasing in mixed-signal systems using the MAX4265ESA+.
How does the disable function affect output impedance and system isolation in the MAX4265ESA+?
When DISABLE_ is pulled low, the MAX4265ESA+ output enters a true high-impedance state (not just tri-state), with leakage current ≤2.5µA and disabled output capacitance of 5pF. This provides >80dB isolation from downstream circuitry at 100MHz, enabling clean multiplexing in shared signal paths without loading or crosstalk - a key advantage over op amps with passive shutdown modes.
What is the typical THD+N performance of the MAX4265ESA+ at 10MHz and 1Vp-p output?
At fC = 10MHz and VOUT = 1Vp-p into 100Ω, the MAX4265ESA+ achieves –87dBc second-harmonic distortion and –91dBc third-harmonic distortion (per datasheet Table 4), yielding THD+N ≈ –85dB. This exceeds the performance of most competing unity-gain stable op amps at this frequency, directly supporting ENOB >13.5 bits in ADC driver applications.
Can the MAX4265ESA+ drive capacitive loads, and what is the recommended isolation strategy?
The MAX4265ESA+ is stable with ≤15pF capacitive load without external compensation. For larger loads (e.g., 100pF), a series isolation resistor (RISO) must be used: 6Ω for MAX4265ESA+ per Figure 2. This resistor decouples the load capacitance from the op amp's output stage, preventing peaking and ensuring <2dB gain variation up to 100MHz - validated in Figures 4a–4c of the MAX4265–MAX4270 datasheet.
MAX4265ESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Last Time Buy
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 900V/µs
- Gain Bandwidth Product:
- 400 MHz
- -3db Bandwidth:
- 400 MHz
- Current - Input Bias:
- 3.5 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 28mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 8 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4265ESA+ FAQ
1.How can I place an order for MAX4265ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4265ESA+ 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 MAX4265ESA+ reliable?
The price and inventory of MAX4265ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4265ESA+ is usually 5 days.
3.What payment methods are accepted for MAX4265ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4265ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4265ESA+?
MAX4265ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4265ESA+ 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 MAX4265ESA+?
For technical support, including MAX4265ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4265ESA+ requirements.
6.How does Aetrix verify that MAX4265ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX4265ESA+ 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 MAX4265ESA+ meets industry standards.
7.What is the process for return or replacement of MAX4265ESA+?
All MAX4265ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4265ESA+, 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 MAX4265ESA+ part is unused and in its original packaging.
Return procedure for MAX4265ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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