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Analog Devices Inc./Maxim Integrated MAX4165EUK-T
- Part No.:
- MAX4165EUK-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX4165EUK-T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,594
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Product details
Overview
The MAX4165EUK-T from Maxim Integrated is a single-channel, precision rail-to-rail input/output operational amplifier optimized for high-output-drive portable audio applications. It delivers ±80mA output current, features 5MHz gain-bandwidth, 250µV offset voltage, and operates from +2.7V to +6.5V single supply - enabling direct drive of 32Ω headphones in battery-powered systems.
For engineers reviewing the MAX4165EUK-T datasheet, MAX4165EUK-T pinout, MAX4165EUK-T application, or MAX4165EUK-T equivalent, key selection criteria include rail-to-rail I/O swing under 3V operation, shutdown current <75µA, capacitive-load stability up to 250pF, and SOT23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX4165EUK-T employs a dual-input-stage architecture (NPN/PNP) to achieve rail-to-rail common-mode input range extending 0.25V beyond VEE and VCC. Its output stage uses complementary bipolar transistors to deliver full-swing sourcing/sinking into 25Ω loads while maintaining <430mV headroom at VCC = 5V.
It integrates internal protection circuitry including 1kΩ series input resistors and back-to-back triple diodes, limiting differential input current above 1.8V. The device is unity-gain stable and supports capacitive loads up to 250pF without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | +2.7V to +6.5V single supply - enables direct use with Li-ion (3.0–4.2V) and 3.3V/5V rails without level shifting. |
| Output Drive | ±80mA min - sufficient to drive 32Ω headphones at >1Vrms without external buffer stages. |
| Gain-Bandwidth | 5MHz - supports audio bandwidth (20Hz–20kHz) with >100dB open-loop gain margin at 20kHz. |
| Input Offset Voltage | 1.5mV max (TA = +25°C), 4.3mV max (–40°C to +85°C) - ensures low DC error in precision signal conditioning paths. |
| Rail-to-Rail I/O | VOUT swings within 25mV of VEE and 30mV of VCC (RL = 100kΩ); 350mV/430mV headroom at 25Ω - enables full dynamic range in single-supply audio buffers. |
| Quiescent Current | 1.5mA max per amplifier (VCC = 5V) - balances performance and battery life in always-on portable systems. |
| Capacitive Load Stability | Stable up to 250pF - eliminates need for isolation resistors in DAC output buffering or line-driver configurations. |
Pinout & Package
The MAX4165EUK-T is housed in a 5-pin SOT23-5 package (JEDEC MO-178AA), footprint-compatible with industry-standard SOT23 layouts and suitable for automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Amplifier output | Delivers rail-to-rail sourced/sunk current; high-impedance in shutdown mode when SHDN = low. |
| 2 - IN− | Inverting input | Differential node for feedback networks; protected by 1kΩ series resistor and clamp diodes. |
| 3 - IN+ | Noninverting input | High-impedance input node; common-mode range extends 0.25V beyond supply rails. |
| 4 - VEE | Negative supply / ground | Reference for single-supply operation; must be connected to system ground (0V). |
| 5 - VCC | Positive supply | Accepts +2.7V to +6.5V; requires local 0.1µF ceramic + ≥1µF bulk bypassing. |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal on overdriven inputs | Prevents latch-up or signal inversion during input transients exceeding rail limits - critical for robust audio front-end protection. |
| Rail-to-rail input common-mode range | VEE − 0.25V to VCC + 0.25V - allows direct interfacing with ADCs/DACs operating at same supply without level-shifting. |
| Unity-gain stable with 250pF load | Enables direct connection to long traces, connectors, or capacitive DAC outputs without added isolation components. |
| 88dB PSRR (f = 1kHz) | Maintains signal integrity in noisy mixed-signal environments (e.g., near RF sections or switching regulators). |
| 250µV typical offset voltage | Reduces DC bias errors in precision transducer amplification and sensor signal chains without trimming. |
Applications
| Portable Headphone Driver | Single-Supply DAC Buffer |
|---|---|
Use Scenario: Driving 32Ω stereo headphones from a 3.3V microcontroller-based audio subsystem. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail op amp configured as noninverting amplifier with gain = 2, delivering >1Vrms into load. Use Value: Eliminates coupling capacitors and dual supplies; ±80mA drive ensures low-distortion output at full volume. | Use Scenario: Buffering the analog output of a 16-bit audio DAC in a portable media player. IC Role / Device Role / Timing Role: Unity-gain voltage follower isolating DAC core from variable headphone impedance. Use Value: 5MHz GBW and 250pF capacitive-load stability preserve transient response and THD+N < 0.02% at 1kHz. |
| Low-Voltage Motor Driver | Laptop Audio Codec Interface |
Use Scenario: Providing current-boosted control signal to small PMDC motors in handheld test equipment. IC Role / Device Role / Timing Role: Precision current-source driver with rail-to-rail output swing referenced to motor ground. Use Value: 25mV output headroom at VEE enables full 0–3.3V control range; 1.5mA quiescent current extends battery runtime. | Use Scenario: Interfacing between a laptop's integrated audio codec and external line-out jack. IC Role / Device Role / Timing Role: Low-noise, high-PSRR buffer amplifying codec output to line-level (2Vrms). Use Value: 88dB PSRR rejects noise from CPU/GPU power domains; rail-to-rail output ensures full signal swing into 10kΩ loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision, high-output-drive op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX44260AUB+T | Higher 10MHz GBW, lower 125µV VOS, but only ±50mA output drive and no shutdown. | Better for wideband signal conditioning; unsuitable for 32Ω headphone drive at full amplitude. | Select MAX44260AUB+T when bandwidth >5MHz is required and output current demand is ≤50mA. |
| OPA365AIDBVR | 25MHz GBW, 10µV VOS, but limited to ±25mA output and 5.5V max supply. | Superior DC precision and speed; insufficient drive for low-Z audio loads. | Choose OPA365AIDBVR for high-accuracy sensor interfaces where output current <25mA suffices. |
Compared with MAX44260AUB+T and OPA365AIDBVR, the MAX4165EUK-T uniquely combines ±80mA drive, rail-to-rail I/O, and 5MHz bandwidth in a 5-pin SOT23 - making it the only option among the three capable of direct 32Ω headphone driving without external boost stages.
Availability
The MAX4165EUK-T is available at Aetrix Electronics and suitable for portable audio systems, battery-powered instrumentation, and low-voltage industrial signal conditioning requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for MAX4165EUK-T 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, automotive, and communications applications.
The MAX4165–MAX4169 family was engineered specifically for portable, single-supply audio signal paths - prioritizing rail-to-rail operation, high output current, low quiescent power, and robust capacitive-load drive capability.
FAQ
What is the maximum capacitive load the MAX4165EUK-T can drive stably?
The MAX4165EUK-T is unity-gain stable with capacitive loads up to 250pF, as confirmed in the datasheet AC Electrical Characteristics table and Figure 8 (Capacitive-Load Stability). This allows direct connection to DAC outputs, long PCB traces, or connector interfaces without external isolation resistors - simplifying layout and preserving signal fidelity in audio and data-acquisition applications.
Does the MAX4165EUK-T have a shutdown feature?
No, the MAX4165EUK-T does not include a shutdown function. Shutdown capability is only available on the MAX4166/MAX4168 variants (e.g., MAX4166EUA, MAX4168ESD). The MAX4165EUK-T draws 1.5mA typical quiescent current and remains fully active whenever powered within its supply range (+2.7V to +6.5V).
What is the guaranteed output voltage swing for the MAX4165EUK-T at 3.3V supply?
At VCC = 3.3V and TA = +25°C, the MAX4165EUK-T guarantees VOUT swing within 40mV of VEE and 40mV of VCC with RL = 100kΩ (per DC Electrical Characteristics table). Under 25Ω load, typical swing is within 160mV of VEE and 340mV of VCC - enabling >2.8Vpp output into low-impedance loads.
Can the MAX4165EUK-T be used with dual supplies?
Yes, the MAX4165EUK-T supports dual-supply operation from ±1.35V to ±3.25V. When using dual supplies, connect VEE to the negative rail (e.g., –1.5V) and VCC to the positive rail (e.g., +1.5V). Input common-mode and output swing remain rail-to-rail relative to the applied supplies, preserving full dynamic range in split-rail signal chains.
What is the input bias current specification for the MAX4165EUK-T over temperature?
The MAX4165EUK-T specifies ±225nA maximum input bias current over the full –40°C to +85°C operating range (DC Electrical Characteristics, second table). At +25°C, typical bias current is ±50nA. This low, well-controlled bias current minimizes offset errors in high-impedance sensor interfaces and precision gain-setting networks.
MAX4165EUK-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 nA
- Voltage - Input Offset:
- 350 µV
- Current - Supply:
- 1.3mA
- Current - Output / Channel:
- 125 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 6.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX4165EUK-T FAQ
1.How can I place an order for MAX4165EUK-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4165EUK-T 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 MAX4165EUK-T reliable?
The price and inventory of MAX4165EUK-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4165EUK-T is usually 5 days.
3.What payment methods are accepted for MAX4165EUK-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4165EUK-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4165EUK-T?
MAX4165EUK-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4165EUK-T 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 MAX4165EUK-T?
For technical support, including MAX4165EUK-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4165EUK-T requirements.
6.How does Aetrix verify that MAX4165EUK-T is sourced from the original manufacturer or authorized distributors?
All MAX4165EUK-T 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 MAX4165EUK-T meets industry standards.
7.What is the process for return or replacement of MAX4165EUK-T?
All MAX4165EUK-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4165EUK-T, 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 MAX4165EUK-T part is unused and in its original packaging.
Return procedure for MAX4165EUK-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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