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Analog Devices Inc./Maxim Integrated MAX4166ESA+T
- Part No.:
- MAX4166ESA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4166ESA+T.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,428
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Product details
Overview
MAX4166ESA+T from Maxim Integrated is a single-channel, rail-to-rail input/output operational amplifier with shutdown control, designed for high-output-drive precision applications in low-voltage battery-powered systems. It delivers ±80mA output current, operates from +2.7V to +6.5V single supply, features 5MHz gain-bandwidth product and 250µV typical input offset voltage, and is used as headphone/speaker driver in portable audio devices.
For engineers reviewing the MAX4166ESA+T datasheet, MAX4166ESA+T pinout, MAX4166ESA+T application, or MAX4166ESA+T equivalent, key selection criteria include guaranteed 80mA drive capability into 25Ω loads, rail-to-rail I/O swing at 3V/5V supplies, shutdown current of 38µA (VCC = 3V), unity-gain stability with up to 250pF capacitive loads, and SO-8 package compatibility with standard PCB footprints.
Technical Context
The MAX4166ESA+T employs a dual-input-stage architecture-NPN and PNP differential pairs-to achieve rail-to-rail common-mode input range extending 0.25V beyond VEE and VCC. Its output stage uses complementary push-pull circuitry enabling millivolt-level output swing near both rails under load.
It integrates an active-low SHDN pin that disables the amplifier core and places the output in high-impedance state while reducing quiescent current to ≤49µA (VCC = 3V). 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 Range | +2.7V to +6.5V single supply - enables direct integration into 3V and 5V battery-powered systems without level-shifting. |
| Output Drive Current | ±80mA min - sufficient to directly drive 32Ω headphones or small speakers without external buffer stages. |
| Gain-Bandwidth Product | 5MHz - supports audio bandwidth (20Hz–20kHz) with ample phase margin and low distortion at unity gain. |
| Input Offset Voltage | 0.25mV typ (25°C), 1.0mV max (–40°C to +85°C) - ensures DC accuracy in precision signal conditioning and DAC buffering. |
| Rail-to-Rail I/O | VCM = VEE – 0.25V to VCC + 0.25V; VOUT swing within 350mV of rails (25Ω load, VCC = 5V) - maximizes dynamic range in single-supply configurations. |
| Shutdown Current | 38µA max (VCC = 3V) - extends battery life in portable devices during idle or sleep modes. |
| PSRR / CMRR | 67dB min PSRR, 71dB min CMRR (–40°C to +85°C) - maintains signal integrity in noisy power environments like laptop motherboards. |
Pinout & Package
The MAX4166ESA+T is housed in an 8-pin SO (Small Outline) package, pin-compatible with industry-standard SOIC-8 footprints and suitable for automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - drives load directly; high-impedance during shutdown. |
| 2 | IN− | Inverting input - accepts feedback network for closed-loop gain configuration. |
| 3 | IN+ | Noninverting input - connects to signal source or reference; matched impedance reduces bias-current-induced offset. |
| 4 | VEE | Negative supply / ground - referenced point for single-supply operation; must be tied to system GND. |
| 5 | VCC | Positive supply - accepts +2.7V to +6.5V; requires local 0.1µF ceramic + ≥1µF bulk bypassing. |
| 6 | SHDN | Active-low shutdown control - pull ≤0.8V to disable amplifier and reduce ICC to µA range. |
| 7 | N.C. | No internal connection - left unconnected; no routing or grounding required. |
| 8 | N.C. | No internal connection - left unconnected; no routing or grounding required. |
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 sensor interfaces. |
| 80mA output sink/source capability | Drives 32Ω loads at full swing - replaces discrete output stages in compact audio amplifiers. |
| Unity-gain stable with 250pF capacitive load | Eliminates need for isolation resistors in LCD bias or filter driver applications - simplifies layout and improves transient response. |
| Low-power shutdown mode | Reduces ICC to ≤49µA (VCC = 3V) - enables rapid power cycling in battery-operated IoT endpoints without firmware overhead. |
| No phase reversal on overdriven inputs | Prevents latch-up or erratic behavior when input exceeds rails - enhances robustness in industrial signal acquisition front-ends. |
Applications
| Portable Headphone Driver | Laptop Audio Output Stage |
|---|---|
Use Scenario: Driving 16–32Ω stereo headphones from a 3.3V codec output in ultraportable notebooks. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail op amp configured as noninverting amplifier with gain = 2–4, providing low-distortion analog output. Use Value: Delivers >100mW into 32Ω with THD+N < 0.04% at 1kHz, eliminating need for dedicated Class AB headphone amps and reducing BOM count. | Use Scenario: Buffering DAC outputs to line-level audio jacks (3.5mm TRS) in thin-and-light laptops with tight thermal constraints. IC Role / Device Role / Timing Role: Precision voltage follower with shutdown control, activated when audio subsystem enters S3/S4 sleep states. Use Value: Maintains DC accuracy (≤1mV offset) across temperature while cutting supply current from 1.4mA to 38µA - extends standby battery life by >20x. |
| Digital-to-Analog Converter Buffer | Transformer/Line Driver for USB Audio |
Use Scenario: Isolating and amplifying audio DAC outputs before feeding into analog volume control or headphone jack in USB-C dongles. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail I/O buffer with 26nV/√Hz input voltage noise, operating from 3.3V USB power rail. Use Value: Preserves SNR > 105dB across 20Hz–20kHz; 5MHz GBW ensures flat group delay for high-resolution PCM playback. | Use Scenario: Driving balanced/unbalanced line outputs (e.g., 600Ω) from USB audio interface ICs in compact field recorders. IC Role / Device Role / Timing Role: High-output-current line driver with 80mA drive, configured as inverting amplifier with gain = −2 to match transformer impedance ratios. Use Value: Delivers 2Vrms into 600Ω with <0.02% THD at 1kHz; rail-to-rail swing avoids clipping on transients even at 3V supply. |
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 |
|---|---|---|---|
| OPA356AIDBVR | Higher GBW (200MHz), lower drive (±30mA), no shutdown, SOT-23-5 package | Better for wideband signal conditioning; unsuitable for speaker/headphone drive or low-power shutdown use cases | Select only if bandwidth >10MHz is required and output current <50mA suffices. |
| TS912IDT | Lower drive (±40mA), no shutdown, SO-8, rail-to-rail input only (not output) | Acceptable for line-level buffering but cannot swing to rails under load - limits dynamic range in 3V systems | Choose only if cost sensitivity outweighs output swing and shutdown requirements. |
Compared with OPA356AIDBVR and TS912IDT, the MAX4166ESA+T uniquely combines 80mA drive, true rail-to-rail I/O, and µA-level shutdown in SO-8 - making it the only option among the three qualified for battery-powered headphone amplification with active power management.
Availability
MAX4166ESA+T is available at Aetrix Electronics and suitable for portable audio systems, laptop audio subsystems, and USB-C audio dongles requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for MAX4166ESA+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 consumer applications.
The MAX4165–MAX4169 family was engineered specifically for low-voltage, high-output-drive audio and signal conditioning roles where rail-to-rail operation, shutdown control, and robust capacitive-load driving are mandatory.
FAQ
What is the maximum capacitive load the MAX4166ESA+T can drive stably?
The MAX4166ESA+T is unity-gain stable with capacitive loads up to 250pF when driving resistive loads ≥1kΩ. For heavier capacitive loads (e.g., >500pF), an isolation resistor (typically 10–39Ω) in series with the output restores phase margin. This capability is verified in the datasheet's Figure 8 (Capacitive-Load Stability) and confirmed across temperature and supply voltage ranges.
Does the MAX4166ESA+T support dual-supply operation?
Yes, the MAX4166ESA+T supports dual-supply operation from ±1.35V to ±3.25V. When used in dual-supply mode, VEE is connected to the negative rail (e.g., –1.5V) and VCC to the positive rail (e.g., +1.5V). All specifications-including input common-mode range, output swing, and shutdown behavior-apply equivalently, as confirmed in the Absolute Maximum Ratings and DC Electrical Characteristics tables.
What is the typical output voltage swing of the MAX4166ESA+T at 3V supply?
At VCC = +3.0V and RL = 100kΩ, the MAX4166ESA+T delivers rail-to-rail output swing: typically within 15mV of VEE and 30mV of VCC. Under heavier load (RL = 25Ω), swing degrades to within 160mV of VEE and 430mV of VCC - still sufficient for 2.5Vpp audio signals in portable systems, as documented in the DC Electrical Characteristics table (VOUT parameter).
How does the shutdown function affect output state in the MAX4166ESA+T?
When the SHDN pin is pulled low (<0.8V), the MAX4166ESA+T disables its internal amplifier core and places the OUT pin in a high-impedance state - electrically disconnecting it from the load. This prevents back-driving or loading of downstream circuits. Output leakage in shutdown is ±2µA max, ensuring minimal interference in multiplexed or shared-bus audio paths.
Is the MAX4166ESA+T pin-compatible with other op amps in SO-8 packages?
The MAX4166ESA+T uses a nonstandard SO-8 pinout: pins 7 and 8 are N.C., and SHDN is on pin 6 - differing from conventional SO-8 op amps (e.g., LM358, TL072) where pin 6 is typically OUTPUT2 or NC. Direct replacement requires PCB layout verification. Pin mapping is explicitly defined in the "Pin Description" and "Pin Configurations" sections of the datasheet.
MAX4166ESA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX4166ESA+T FAQ
1.How can I place an order for MAX4166ESA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4166ESA+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 MAX4166ESA+T reliable?
The price and inventory of MAX4166ESA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4166ESA+T is usually 5 days.
3.What payment methods are accepted for MAX4166ESA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4166ESA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4166ESA+T?
MAX4166ESA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4166ESA+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 MAX4166ESA+T?
For technical support, including MAX4166ESA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4166ESA+T requirements.
6.How does Aetrix verify that MAX4166ESA+T is sourced from the original manufacturer or authorized distributors?
All MAX4166ESA+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 MAX4166ESA+T meets industry standards.
7.What is the process for return or replacement of MAX4166ESA+T?
All MAX4166ESA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4166ESA+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 MAX4166ESA+T part is unused and in its original packaging.
Return procedure for MAX4166ESA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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