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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:995
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Product details
Overview
The MAX4165EUK+T from Maxim Integrated is a single-channel, rail-to-rail input/output operational amplifier optimized for high-output-drive precision applications in low-voltage, battery-powered systems. It delivers ±80mA output current, features 5MHz gain-bandwidth product, 250µV typical offset voltage, and operates from +2.7V to +6.5V single supply - enabling use as headphone driver, DAC buffer, or line driver in portable audio devices.
For engineers reviewing the MAX4165EUK+T datasheet, MAX4165EUK+T pinout, MAX4165EUK+T application, or MAX4165EUK+T equivalent, key selection criteria include guaranteed rail-to-rail I/O swing under 25Ω load, shutdown current of 38µA (at 3V), unity-gain stability with 250pF capacitive loads, 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 push-pull circuitry to deliver full-swing performance - sinking 160mV above VEE and sourcing within 430mV of VCC at 25Ω load (VCC = 5V).
It integrates internal protection: 1kΩ series input resistors and back-to-back triple diodes limit differential input fault current. No phase reversal occurs during overdriven inputs, and it maintains ≥65dB PSRR and ≥57dB CMRR across –40°C to +85°C operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +6.5V single supply - supports Li-ion, Li-poly, and dual-cell alkaline battery systems without level-shifting. |
| Output Drive Current | ±80mA min - drives 32Ω headphones directly or 25Ω transformer/line loads without external buffers. |
| Gain-Bandwidth Product | 5MHz - enables stable unity-gain operation with 250pF capacitive loads and supports audio bandwidth up to 200kHz. |
| Input Offset Voltage | 1.5mV max (25°C), 4.3mV max (–40°C to +85°C) - ensures low DC error in precision signal conditioning paths. |
| Rail-to-Rail I/O Swing | VOL ≤ 25mV (RL = 100kΩ), VOH ≥ VCC – 30mV (RL = 100kΩ); VOL ≤ 350mV, VOH ≥ VCC – 430mV (RL = 25Ω) - maximizes dynamic range in single-supply audio stages. |
| Quiescent Supply Current | 1.2mA per amplifier (VCC = 3V) - balances performance and battery life in always-on portable systems. |
| Shutdown Current | 38µA (VCC = 3V) - reduces system standby power by >97% while preserving high-Z output state. |
Pinout & Package
The MAX4165EUK+T is housed in a 5-pin SOT23-5 package (JEDEC MO-178AA), footprint-compatible with industry-standard SOT-23 layouts and suitable for automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Amplifier output | Capable of sourcing/sinking ±80mA; rail-to-rail swing; high-Z in shutdown mode. |
| 2 - IN− | Inverting input | Differential input node; protected by 1kΩ series resistor and back-to-back diodes. |
| 3 - IN+ | Noninverting input | Differential input node; same protection as IN−; common-mode range extends VEE – 0.25V to VCC + 0.25V. |
| 4 - VEE | Negative supply / ground | Reference for single-supply operation; must be connected to system ground. |
| 5 - VCC | Positive supply | Accepts +2.7V to +6.5V; requires local 0.1µF ceramic + ≥1µF bulk bypassing. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends 0.25V beyond supply rails - eliminates need for input biasing networks in single-supply designs. |
| Rail-to-rail output voltage swing | Delivers >99% of full-scale output at 100kΩ load - preserves SNR in DAC buffer and line driver applications. |
| Unity-gain stable with 250pF capacitive load | Enables direct driving of long cables or ADC input capacitance without external isolation resistors. |
| No phase reversal on overdriven inputs | Prevents latch-up or unpredictable behavior when input exceeds common-mode limits - critical for robust audio front-ends. |
| Low-power shutdown mode | Reduces ICC to 38µA (3V) and places OUT in high-impedance - allows dynamic power gating in multi-channel audio subsystems. |
Applications
| Portable Headphone Driver | DAC Output Buffer |
|---|---|
Use Scenario: Driving 16Ω–32Ω stereo headphones from a low-voltage audio codec in smartphones or wearables. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail op amp configured as noninverting amplifier with gain ≥2V/V and DC-blocking capacitor. Use Value: Delivers 80mA peak current to drive headphones at full volume without clipping; 250µV offset minimizes audible DC pop at power-on. | Use Scenario: Buffering the analog output of a 16-bit DAC in a portable medical sensor or industrial data logger. IC Role / Device Role / Timing Role: Precision voltage follower with low THD (<0.01% at 1kHz) and wide bandwidth to preserve DAC settling accuracy. Use Value: 5MHz GBWP and 250µV offset ensure <1 LSB error across full 0–5V output range; rail-to-rail swing maximizes usable DAC code span. |
| Single-Supply Line Driver | Transformer Coupled Audio Amplifier |
Use Scenario: Transmitting line-level audio signals (2Vrms) over 10m shielded cable in notebook sound ports or docking stations. IC Role / Device Role / Timing Role: High-current, low-output-impedance driver (ZOUT < 0.1Ω) with 25Ω source termination capability. Use Value: ±80mA drive sustains signal integrity into 600Ω line loads; 88dB PSRR rejects supply noise from shared digital rails. | Use Scenario: Driving a 1:1 audio transformer primary in a car hands-free kit to isolate microphone/audio paths. IC Role / Device Role / Timing Role: Single-ended to differential converter with AC-coupled output and 32Ω–600Ω impedance matching. Use Value: 4.3mV max offset over temperature prevents transformer core saturation; shutdown mode disables amplifier during mute intervals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-output-drive, rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA365AIDBVR | Higher GBWP (50MHz), lower quiescent current (4.2mA), no shutdown pin, SO-5 package only. | Lacks integrated shutdown; unsuitable where dynamic power gating is required. | Select when ultra-high bandwidth (>10MHz) is needed and shutdown functionality is not required. |
| TS912IDT | Lower output drive (±30mA), wider supply range (2.7V–16V), no rail-to-rail output, SO-8 package. | Cannot drive low-impedance loads like headphones or transformers directly. | Select for general-purpose precision amplification where output current <50mA suffices and higher supply voltage tolerance is needed. |
Compared with OPA365AIDBVR and TS912IDT, the MAX4165EUK+T uniquely combines 80mA output drive, rail-to-rail I/O, integrated shutdown, and SOT23-5 packaging - making it the only option among the three qualified for space-constrained, battery-powered headphone driver designs requiring active power management.
Availability
The MAX4165EUK+T is available at Aetrix Electronics and suitable for portable audio systems, battery-powered instrumentation, and low-voltage signal conditioning applications requiring stable component supply, RoHS-compliant lead-free packaging, and extended temperature support (–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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, computing, and consumer markets.
The MAX4165EUK+T belongs to the MAX4165–MAX4169 family - engineered specifically for precision, high-output-drive, single-supply rail-to-rail op amp applications in portable audio, DAC buffering, and low-voltage line driving.
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's AC Electrical Characteristics and Typical Operating Characteristics (Figure 8). For loads exceeding 250pF - such as long cables or high-input-capacitance ADCs - an isolation resistor (e.g., 39Ω) in series with the output restores phase margin and prevents oscillation, as demonstrated in Figures 9–11 of the MAX4165–MAX4169 datasheet. The MAX4165EUK+T does not require external compensation under standard conditions.
Does the MAX4165EUK+T have a shutdown function?
No, the MAX4165EUK+T does not include a shutdown pin. Shutdown functionality is available only on the MAX4166, MAX4168, and MAX4169 variants (e.g., MAX4166EUA+T). The MAX4165EUK+T is the base single-amplifier variant without SHDN; its pinout (SOT23-5) contains only OUT, IN−, IN+, VEE, and VCC. This is explicitly stated in the Ordering Information table and Pin Configurations section of the datasheet.
What is the guaranteed output voltage swing for the MAX4165EUK+T at 5V supply and 25Ω load?
At VCC = 5V and RL = 25Ω to ground, the MAX4165EUK+T guarantees VOH ≥ VCC – 430mV (i.e., ≥4.57V) and VOL ≤ 350mV (i.e., ≤0.35V), per the DC Electrical Characteristics table (page 2, "Output Voltage Swing" row). This 4.22V total swing enables >84% utilization of the 5V rail in demanding line-driving or speaker-buffering applications.
Is the MAX4165EUK+T suitable for driving 32Ω headphones directly?
Yes, the MAX4165EUK+T is explicitly designed for this use case. Its ±80mA minimum output current and rail-to-rail output swing allow direct connection to 32Ω headphones without external transistors or transformers. The Typical Operating Circuit (page 15) shows a validated 32Ω headphone interface using C1 (DC-blocking cap), R1/R2 (gain setting), and C2 (low-frequency pole control). Thermal and power dissipation limits must be observed per the Package Power Dissipation section (page 9).
What is the input bias current specification for the MAX4165EUK+T over temperature?
The MAX4165EUK+T has a maximum input bias current of ±225nA over the full –40°C to +85°C operating range, as specified in the DC Electrical Characteristics table (page 3, "Input Bias Current" row). At +25°C, typical bias current is ±50nA. This low, well-controlled bias current minimizes offset errors in high-impedance sensor interfaces and ensures predictable performance in 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:
- Active
- 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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