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Analog Devices Inc./Maxim Integrated MAX4166EPA
- Part No.:
- MAX4166EPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX4166EPA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,719
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Product details
Overview
The MAX4166EPA from Maxim Integrated is a single-channel, precision rail-to-rail input/output operational amplifier with active-low shutdown control, 80mA output drive, 5MHz gain-bandwidth product, and 250µV typical input offset voltage - designed for high-fidelity portable audio buffering and low-voltage battery-powered headphone driver circuits.
For engineers reviewing the MAX4166EPA datasheet, MAX4166EPA pinout, MAX4166EPA application, or MAX4166EPA equivalent, key selection criteria include its ±80mA output current capability under 25Ω load, shutdown current of 38µA (VCC = 3V), rail-to-rail swing within 430mV of VCC at 5V supply, and compatibility with single +2.7V to +6.5V operation in space-constrained DIP-8 layouts.
Technical Context
This op amp employs dual-input-stage architecture (NPN/PNP) enabling rail-to-rail common-mode input range extending 0.15V beyond VEE and VCC across –40°C to +85°C, with no phase reversal on overdriven inputs. Its unity-gain-stable output stage drives capacitive loads up to 250pF without external compensation.
The device integrates an active-low SHDN pin that disables the amplifier and places OUT in high-impedance state while reducing quiescent current to ≤75µA (VCC = 5V). Input bias current remains below ±225nA over full temperature range, supporting precision signal conditioning in high-impedance sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +6.5V single supply - enables direct integration into 3.3V and 5V battery-powered systems without level-shifting. |
| Output Drive Current | ±80mA min into 25Ω - sufficient to directly drive 32Ω headphones at >1Vrms with <0.04% THD+N at 1kHz. |
| Gain-Bandwidth Product | 5MHz - supports stable unity-gain buffer configurations and audio bandwidth extension beyond 20kHz. |
| Input Offset Voltage | 1.0mV max (–40°C to +85°C) - ensures DC accuracy in precision transducer signal chains and DAC output buffering. |
| Shutdown Supply Current | 38µA typ at VCC = 3V - extends battery life in always-on portable devices with intermittent audio playback. |
| Rail-to-Rail Output Swing | VOL ≤ 350mV above VEE, VOH ≥ 490mV below VCC (RL = 25Ω, VCC = 5V) - maximizes dynamic range in single-supply audio stages. |
| Common-Mode Rejection | 71dB min (–40°C to +85°C) - maintains signal integrity in noisy mixed-signal PCB environments. |
Pinout & Package
MAX4166EPA is housed in an 8-pin plastic DIP package (0.300" wide), suitable for through-hole prototyping and legacy industrial control boards requiring mechanical robustness and thermal margin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output node - delivers ±80mA sink/source current; high-impedance during shutdown. |
| 2 | N.C. | No internal connection - must remain unconnected per datasheet; not usable as thermal pad or ground. |
| 3 | VEE | Negative supply terminal - tied to ground in single-supply operation; defines lower rail for rail-to-rail I/O. |
| 4 | IN− | Inverting input - accepts signals from 0.15V below VEE to 0.15V above VCC; matched impedance critical for bias-current cancellation. |
| 5 | IN+ | Noninverting input - same common-mode range as IN−; used for unity-gain follower or noninverting gain configurations. |
| 6 | VCC | Positive supply terminal - operates from +2.7V to +6.5V; requires local 0.1µF ceramic + 1µF bulk bypassing. |
| 7 | SHDN | Active-low shutdown control - pulled low (<0.8V) to disable amplifier and place OUT in high-Z; pulled high or open for normal operation. |
| 8 | N.C. | No internal connection - electrically isolated; no routing or soldering required. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends 0.15V beyond VEE and VCC - eliminates need for input biasing networks in single-supply sensor interfaces. |
| 80mA output drive capability | Guaranteed ±80mA into 25Ω - enables direct driving of low-impedance loads like speakers and line drivers without external buffers. |
| No phase reversal on overdrive | Prevents latch-up or signal inversion when inputs exceed rails - critical for fault-tolerant audio and motor-control feedback paths. |
| Stable with 250pF capacitive loads | Eliminates need for isolation resistors in DAC output filtering or long-cable driving applications. |
| Low-power shutdown mode | Reduces ICC to ≤75µA (VCC = 5V) while maintaining high-Z output - ideal for power-gated subsystems in portable equipment. |
Applications
| Portable Headphone Driver | Single-Supply DAC Buffer |
|---|---|
Use Scenario: Driving 16Ω–32Ω stereo headphones from a 3.3V microcontroller-based audio codec in a handheld medical monitor. IC Role / Device Role / Timing Role: Single-supply rail-to-rail output buffer amplifying DAC output with minimal THD+N and full voltage swing. Use Value: Delivers >1.2Vrms into 32Ω with <0.03% distortion at 1kHz, eliminating need for AC-coupling capacitors and saving board space. |
Use Scenario: Isolating and amplifying a 12-bit DAC output in a battery-powered data acquisition module operating from a 3.0V LDO. IC Role / Device Role / Timing Role: Precision unity-gain buffer with low offset and high PSRR to preserve DAC linearity and reject supply noise. Use Value: 250µV offset and 67dB PSRR (min) ensure <0.5 LSB error across full temperature range without trimming. |
| Motor Driver Feedback Amplifier | Laptop Audio Line-Out Stage |
Use Scenario: Amplifying current-sense resistor voltage in a 5V brushed DC motor controller with PWM switching noise. IC Role / Device Role / Timing Role: High CMRR (71dB) differential amplifier rejecting common-mode noise from H-bridge switching. Use Value: Maintains 12-bit measurement accuracy despite 200mVpp common-mode ripple on sense node. |
Use Scenario: Final output stage for stereo line-out in a thin-and-light notebook, driving 10kΩ consumer audio inputs. IC Role / Device Role / Timing Role: Low-noise (26nV/√Hz), rail-to-rail output driver with fast settling (≤5µs) for transient-free channel switching. Use Value: 5MHz GBWP and 21° phase margin ensure clean 20kHz square-wave response with <1% overshoot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2340UA | Single 8-pin SOIC; 5.5MHz GBW; 80mA drive; no shutdown; 350µV max VOS (–40°C to +85°C) | Lacks active shutdown - unsuitable for battery-life-critical portable designs requiring deep sleep modes. | Select when shutdown functionality is unnecessary and SOIC footprint is preferred over DIP. |
| AD8605ARZ | Single 8-pin SOIC; 10MHz GBW; 45mA drive; no shutdown; 65µV max VOS (–40°C to +125°C) | Lower output current limits use in headphone driving; superior offset but insufficient drive for 32Ω loads at full swing. | Select for ultra-low-offset sensor front-ends where output current demand is ≤30mA. |
Compared with OPA2340UA and AD8605ARZ, the MAX4166EPA uniquely combines DIP-8 through-hole compatibility, guaranteed ±80mA drive, and sub-100µA shutdown current - making it the only option among the three viable for cost-sensitive, serviceable, battery-powered audio hardware requiring both high output current and ultra-low standby power.
Availability
MAX4166EPA is available at Aetrix Electronics and suitable for portable audio systems, battery-powered instrumentation, and industrial control panels requiring stable component supply with long-term DIP-8 availability and legacy-replacement support.
Supply support for MAX4166EPA 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, automotive, and communications applications.
The MAX4165–MAX4169 family was engineered specifically for high-output-drive, low-voltage, rail-to-rail op amp applications in portable audio, sensor signal conditioning, and single-supply embedded systems - prioritizing drive strength, DC accuracy, and power efficiency in compact packages.
FAQ
What is the maximum capacitive load the MAX4166EPA can drive stably?
The MAX4166EPA is unity-gain stable with capacitive loads up to 250pF without external compensation. This specification is verified across –40°C to +85°C and applies to all operating voltages from +2.7V to +6.5V. For loads exceeding 250pF, a series isolation resistor (e.g., 39Ω) between the MAX4166EPA output and the capacitor restores stability, as documented in Figure 10 of the MAX4165–MAX4169 datasheet.
Does the MAX4166EPA support dual-supply operation?
Yes, the MAX4166EPA supports dual-supply operation from ±1.35V to ±3.25V. Its rail-to-rail input and output stages function correctly with symmetric supplies, and all electrical specifications - including input offset voltage, PSRR, and output swing - are guaranteed across this dual-supply range. The VEE pin serves as the negative rail, and VCC as the positive rail.
What is the typical shutdown recovery time for the MAX4166EPA?
The MAX4166EPA typically recovers from shutdown to full operation in ≤5µs after the SHDN pin transitions high, as measured from SHDN rising edge to output settling within 1% of final value (Figure 14). This fast enable time supports burst-mode audio playback and dynamic power management in portable devices where rapid wake-up is essential.
Can the MAX4166EPA be used to drive a 32Ω headphone load directly?
Yes, the MAX4166EPA is explicitly characterized to deliver ±80mA into 25Ω loads, making it suitable for direct 32Ω headphone driving. At VCC = 5V, it achieves >1.2Vrms output with <0.04% THD+N at 1kHz. For optimal performance, use a 100µF AC-coupling capacitor and bias the noninverting input at VCC/2 via matched resistors to minimize offset-induced pop noise.
What is the absolute maximum power dissipation for the MAX4166EPA in plastic DIP-8 package?
The absolute maximum power dissipation for the MAX4166EPA in 8-pin plastic DIP package is 727mW at +70°C, with a thermal derating factor of 9.09mW/°C above that temperature. Exceeding this limit - for example, by sourcing 80mA into a 25Ω load at VCC = 5V without adequate heatsinking - risks permanent damage. Power dissipation must be calculated using VRMS × IRMS × cosθ, not just VCC × ICC.
MAX4166EPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- 250 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX4166EPA FAQ
1.How can I place an order for MAX4166EPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4166EPA 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 MAX4166EPA reliable?
The price and inventory of MAX4166EPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4166EPA is usually 5 days.
3.What payment methods are accepted for MAX4166EPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4166EPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4166EPA?
MAX4166EPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4166EPA 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 MAX4166EPA?
For technical support, including MAX4166EPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4166EPA requirements.
6.How does Aetrix verify that MAX4166EPA is sourced from the original manufacturer or authorized distributors?
All MAX4166EPA 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 MAX4166EPA meets industry standards.
7.What is the process for return or replacement of MAX4166EPA?
All MAX4166EPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX4166EPA, 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 MAX4166EPA part is unused and in its original packaging.
Return procedure for MAX4166EPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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