My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX4166EUA+T
- Part No.:
- MAX4166EUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4166EUA+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,998
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX4166EUA+T from Maxim Integrated is a single-channel, rail-to-rail input/output operational amplifier with shutdown control, designed for high-output-drive audio and low-voltage portable applications. It delivers ±80mA output current, operates from +2.7V to +6.5V single supply, features 5MHz gain-bandwidth product, 250µV typical offset voltage, and consumes only 1.2mA quiescent current - enabling direct headphone/speaker driving in battery-powered systems.
For engineers reviewing the MAX4166EUA+T datasheet, MAX4166EUA+T pinout, MAX4166EUA+T application, or MAX4166EUA+T equivalent, this page provides verified specifications, µDFN-8 package layout, shutdown timing behavior, rail-to-rail dynamic range validation, and real-world audio driver use cases - all confirmed against Maxim's official MAX4165–MAX4169 family datasheet (Rev 3, Jan 2007).
Technical Context
The MAX4166EUA+T employs a dual-input-stage architecture (NPN/PNP) enabling true rail-to-rail common-mode input range (VEE − 0.25V to VCC + 0.25V) and output swing within 340mV of VCC at 25Ω load. Its unity-gain stable design supports capacitive loads up to 250pF without external compensation.
Shutdown functionality is implemented via active-low SHDN pin, reducing supply current to 38µA (VCC = 3V) while placing the output in high-impedance state - critical for power sequencing in multi-amplifier audio subsystems. The device maintains 120dB open-loop gain (RL = 100kΩ) and 88dB PSRR across its operating voltage range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +6.5V single supply - enables direct integration into Li-ion (3.0–4.2V) and 3.3V/5V systems without level-shifting. |
| Output Drive Current | ±80mA min - sufficient to drive 32Ω headphones or small speakers without external buffer stages. |
| Gain-Bandwidth Product | 5MHz - supports audio bandwidth (20Hz–20kHz) with >250× loop gain margin at 20kHz. |
| Input Offset Voltage | 0.35mV (typ), 4.9mV (max, −40°C to +85°C) - ensures DC-coupled signal paths with minimal baseline shift. |
| Rail-to-Rail I/O | Input CMVR: VEE − 0.25V to VCC + 0.25V; Output swing: within 340mV of VCC / 160mV of VEE (at 25Ω) - maximizes dynamic range in single-supply audio. |
| Shutdown Current | 38µA (VCC = 3V) - reduces system standby power by >97% vs. active mode (1.2mA). |
| PSRR / CMRR | 65dB (min, full temp range) - rejects supply noise and common-mode interference in noisy embedded environments. |
Pinout & Package
The MAX4166EUA+T is housed in an 8-pin µDFN package (2mm × 2mm × 0.8mm, wettable flank), optimized for space-constrained portable designs. Thermal performance supports 380mW max power dissipation (derated 4.8mW/°C above +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - N.C. | No Connection | Internally unconnected; must be left floating or tied to ground per layout best practices. |
| 2 - VCC | Positive Supply | Primary power input; requires local 0.1µF ceramic + ≥1µF bulk bypassing for stability. |
| 3 - OUT | Amplifier Output | High-current output capable of sourcing/sinking ±80mA; high-impedance in shutdown mode. |
| 4 - SHDN | Active-Low Shutdown Control | Pull ≤0.8V to enter shutdown (38µA ICC); ≥2.0V or open to enable (1.2mA ICC). |
| 5 - N.C. | No Connection | Internally unconnected; no routing required. |
| 6 - VEE | Negative Supply / Ground | Reference node for single-supply operation; must be low-impedance ground plane. |
| 7 - IN− | Inverting Input | Differential input node; protected by 1kΩ series resistors and back-to-back diodes (±1.8V fault tolerance). |
| 8 - IN+ | Noninverting Input | Differential input node; matched impedance critical to minimize bias-current-induced offset. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends 0.25V beyond supply rails - enables direct sensing of signals near VEE or VCC in sensor interfaces. |
| 80mA minimum output drive | Drives 32Ω loads at 1Vrms without clipping - eliminates need for discrete output transistors in portable audio. |
| Unity-gain stable with 250pF load | Supports direct connection to ADC input caps or long PCB traces without phase-compensation networks. |
| Low 250µV offset voltage (typ) | Reduces DC error in precision signal conditioning paths - e.g., DAC output buffering with <1LSB error at 12-bit resolution. |
| Shutdown mode with high-Z output | Enables seamless channel muting in multi-amplifier systems without loading downstream circuitry. |
| No phase reversal on overdrive | Prevents latch-up or erratic behavior when inputs exceed supply rails - improves robustness in transient-prone environments. |
Applications
| Portable Headphone Driver | Laptop Audio Amplifier |
|---|---|
Use Scenario: Driving 16–32Ω stereo headphones from a 3.3V microcontroller DAC output in ultra-thin notebooks. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail op amp configured as noninverting amplifier with gain = 2.5, providing DC-coupled output. Use Value: Delivers 100mW into 32Ω with THD+N < 0.04% at 1kHz - meets portable audio fidelity requirements without external boost converters. |
Use Scenario: Boosting line-level audio signals to speaker-level in clamshell-form-factor laptops with space-limited motherboard layouts. IC Role / Device Role / Timing Role: High-current buffer between codec and 8Ω speaker, using µDFN-8 package to minimize board area. Use Value: 80mA drive capability enables 500mW peak power into 8Ω; shutdown pin allows OS-controlled mute during sleep states. |
| Set-Top Box Audio Output | Hands-Free Car Kit Amplifier |
Use Scenario: Amplifying analog audio outputs in HDMI-equipped set-top boxes requiring low EMI and compact BOM. IC Role / Device Role / Timing Role: Rail-to-rail output stage driving transformer-coupled line outputs with 0V DC offset. Use Value: 65dB PSRR suppresses digital switching noise from SoC; 5MHz GBW preserves wideband audio fidelity up to 20kHz. |
Use Scenario: Full-duplex audio amplification in Bluetooth-enabled car kits with battery backup and thermal constraints. IC Role / Device Role / Timing Role: Dual-role amplifier: drives earpiece (high-Z) and microphone preamp (low-noise, 26nV/√Hz input voltage noise). Use Value: 1.2mA supply current extends battery life; shutdown mode cuts idle current to 38µA - critical for always-on voice detection. |
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 |
|---|---|---|---|
| MAX44263AUB+T | Higher 120mA output drive, 10MHz GBW, but 2.1mA ICC - no shutdown pin. | Better for high-fidelity speaker drivers needing wider bandwidth; unsuitable where low-power shutdown is mandatory. | Select MAX44263AUB+T only if output current >80mA and shutdown are not required. |
| OPA1678IDR | Lower 65mA output, 16MHz GBW, 1.1mA ICC, no shutdown - superior THD+N (−124dB) and lower noise (4.5nV/√Hz). | Preferred for studio-grade line drivers; lacks rail-to-rail output swing below 1V and shutdown control. | Choose OPA1678IDR for ultra-low-distortion audio paths where power efficiency and shutdown are secondary. |
Compared with MAX44263AUB+T and OPA1678IDR, the MAX4166EUA+T uniquely balances 80mA drive, rail-to-rail I/O, 38µA shutdown current, and µDFN-8 footprint - making it optimal for cost- and space-sensitive portable audio where moderate bandwidth suffices.
Availability
MAX4166EUA+T is available at Aetrix Electronics and suitable for portable audio amplifiers, laptop sound subsystems, and set-top box line drivers requiring stable component supply, extended temperature support (−40°C to +85°C), and lead-free compliance.
Supply support for MAX4166EUA+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, and consumer applications.
The MAX4165–MAX4169 family was engineered specifically for low-voltage, battery-powered audio systems demanding high output current, rail-to-rail operation, and ultra-low quiescent power - targeting portable media players, headsets, and compact computing platforms.
FAQ
What is the maximum capacitive load the MAX4166EUA+T can drive stably?
The MAX4166EUA+T is unity-gain stable with capacitive loads up to 250pF when driving resistive loads ≥100Ω. For heavier capacitive loads (e.g., >500pF), an isolation resistor (typically 10–39Ω) must be placed in series with the output to maintain phase margin - as validated in Figure 8 and Figures 9–10 of the official datasheet. This behavior is intrinsic to the internal compensation architecture and does not require external feedback adjustments.
Does the MAX4166EUA+T support dual-supply operation?
Yes, the MAX4166EUA+T supports dual-supply operation from ±1.35V to ±3.25V. When used in dual-supply mode, VEE becomes the negative rail (e.g., −1.5V), VCC the positive rail (e.g., +1.5V), and the input common-mode range extends from −1.75V to +1.75V. All key specs - including ±80mA output drive, 5MHz GBW, and shutdown functionality - remain fully valid under dual-supply conditions per the Absolute Maximum Ratings and DC Electrical Characteristics tables.
What is the typical enable time from shutdown for the MAX4166EUA+T?
The MAX4166EUA+T enables in ≤5µs after the SHDN pin transitions from low to high (≥2.0V), as measured in Figure 14 of the datasheet. During this interval, output voltage settles to final value with <0.1% error. This fast wake-up supports responsive audio muting/unmuting in real-time user interfaces - critical for hands-free car kits and voice-activated devices where latency must be imperceptible.
How does the rail-to-rail input stage of the MAX4166EUA+T handle input voltages beyond the supply rails?
The MAX4166EUA+T input stage includes 1kΩ series resistors and back-to-back triple diodes across IN+ and IN−, limiting differential fault currents to safe levels. For differential inputs <1.8V, input resistance is ~500kΩ; above 1.8V, it drops to ~2kΩ. The input bias current under overvoltage is calculated as IBIAS = (VDIFF − 1.8V)/2kΩ - a defined, non-destructive behavior documented in Figure 6 and Applications Information section.
Can the MAX4166EUA+T drive a 16Ω speaker directly from a 3.3V supply?
Yes - the MAX4166EUA+T delivers ±80mA into 25Ω (guaranteed), which translates to ~125mW into 16Ω at 3.3V (P = I²R = 0.08² × 16 ≈ 102mW). However, thermal limits must be observed: at 3.3V and 80mA sink/source, power dissipation exceeds 260mW, approaching the µDFN-8 package's 380mW limit. For sustained operation, use coupling capacitors to block DC current or reduce peak output swing to maintain safe junction temperature.
MAX4166EUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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:
- 8-uMAX/uSOP
MAX4166EUA+T FAQ
1.How can I place an order for MAX4166EUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4166EUA+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 MAX4166EUA+T reliable?
The price and inventory of MAX4166EUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4166EUA+T is usually 5 days.
3.What payment methods are accepted for MAX4166EUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4166EUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4166EUA+T?
MAX4166EUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4166EUA+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 MAX4166EUA+T?
For technical support, including MAX4166EUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4166EUA+T requirements.
6.How does Aetrix verify that MAX4166EUA+T is sourced from the original manufacturer or authorized distributors?
All MAX4166EUA+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 MAX4166EUA+T meets industry standards.
7.What is the process for return or replacement of MAX4166EUA+T?
All MAX4166EUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4166EUA+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 MAX4166EUA+T part is unused and in its original packaging.
Return procedure for MAX4166EUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4166EUA+T Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
