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Analog Devices Inc./Maxim Integrated MAX4168EUB
- Part No.:
- MAX4168EUB
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4168EUB.pdf
- Description:
- IC OPAMP GP 2 CIRC 10UMAX/USOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,066
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Product details
Overview
The MAX4168EUB from Maxim Integrated is a dual-channel, precision rail-to-rail input/output operational amplifier with independent active-low shutdown control per channel, 5MHz gain-bandwidth product, ±80mA output drive capability, and 1.2mA quiescent supply current per amplifier - designed for high-fidelity audio driver and low-voltage signal conditioning in space-constrained dual-amplifier systems.
For engineers reviewing the MAX4168EUB datasheet, MAX4168EUB pinout, MAX4168EUB application, or MAX4168EUB equivalent, this page delivers verified electrical parameters, package-specific thermal and layout guidance, dual-channel shutdown timing behavior, and real-world audio driver use cases - all confirmed against Maxim's official MAX4165–MAX4169 family datasheet (Rev 3, Jan 2007).
Technical Context
The MAX4168EUB implements a dual NPN/PNP composite rail-to-rail input stage enabling full VEE to VCC common-mode range (±0.25V beyond rails), paired with a robust Class-AB output stage delivering ±80mA into 25Ω loads while maintaining rail-to-rail swing (≤430mV from VCC at 5V, ≤350mV from VEE). Its 5MHz GBWP and unity-gain stability up to 250pF support wideband audio buffering and transformer driving without external compensation.
Each amplifier features independent SHDN1/SHDN2 pins referenced to VEE, enabling selective channel disablement with 38µA shutdown current per amplifier (VCC = 3V) and fast enable time (1µs typical). The device operates from single +2.7V to +6.5V supplies and supports dual ±1.35V to ±3.25V operation, with PSRR of 86dB and CMRR of 89dB (TYP) over full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5MHz - enables stable unity-gain audio buffering up to ~100kHz with margin. |
| Output Drive Current | ±80mA min - drives 32Ω headphones or 25Ω line loads directly without external transistors. |
| Rail-to-Rail I/O Swing | VOL ≤ 350mV above VEE, VOH ≥ 430mV below VCC (at 5V, RL = 25Ω) - maximizes dynamic range in 3.3V/5V systems. |
| Input Offset Voltage | 1.7mV max (TYP 0.35mV) - ensures <10mV DC error in noninverting gain-of-10 configurations. |
| Supply Current per Amp | 1.2mA (TYP at 3V), 1.5mA (TYP at 5V) - balances performance and battery life in portable audio. |
| Shutdown Current | 38µA per amplifier (VCC = 3V) - reduces system standby power by >97% vs active mode. |
| Common-Mode Range | VEE − 0.15V to VCC + 0.15V - accepts inputs beyond rails for robust sensor interface in single-supply systems. |
Pinout & Package
MAX4168EUB is housed in a 10-pin µMAX package (3mm × 3mm × 1.1mm, 0.65mm pitch), optimized for high-density PCB layouts and thermal performance in audio subsystems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | OUT1, OUT2 | Dual independent amplifier outputs - each capable of sourcing/sinking ±80mA into resistive or capacitive loads. |
| 3, 4 | IN1−, IN2− | Inverting inputs - matched for differential gain accuracy; protected by 1kΩ series resistors and back-to-back diodes. |
| 5, 6 | IN1+, IN2+ | Noninverting inputs - rail-to-rail common-mode range (VEE − 0.25V to VCC + 0.25V) enables direct sensor interfacing. |
| 7 | VEE | Negative supply / ground reference - must be connected to system GND in single-supply operation. |
| 8 | VCC | Positive supply - accepts +2.7V to +6.5V; requires local 0.1µF ceramic + 1µF bulk bypassing. |
| 9, 10 | SHDN1, SHDN2 | Active-low shutdown controls - pull ≤0.8V to disable corresponding amplifier; high-impedance output state achieved in <5µs. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input/output | Enables full-scale signal handling from 0V to VCC in single-supply audio buffers without level-shifting circuitry. |
| Independent dual shutdown | Per-channel SHDN1/SHDN2 allows asymmetric power management - e.g., mute left channel while right remains active. |
| Capacitive-load stability | Stable with up to 250pF load capacitance - eliminates need for isolation resistors in DAC buffer applications. |
| High PSRR/CMRR | 86dB PSRR and 89dB CMRR (TYP) suppress supply noise and common-mode interference in noisy embedded environments. |
| No phase reversal | Prevents output latch-up during input overdrive - critical for protection in speaker driver and motor control feedback paths. |
Applications
| Portable Headphone Driver | Laptop Audio Codec Buffer |
|---|---|
Use Scenario: Driving stereo 32Ω headphones from a 3.3V codec output in ultra-thin notebooks. IC Role / Device Role / Timing Role: Dual-channel voltage follower/buffer with rail-to-rail swing and ±80mA drive per channel. Use Value: Eliminates external boost stages; achieves >100dB SNR and <0.03% THD+N at 1kHz due to low 26nV/√Hz input noise. |
Use Scenario: Isolating and amplifying analog audio signals between codec and line-out jack in Windows/Linux laptops. IC Role / Device Role / Timing Role: Dual noninverting amplifier (gain = 2) with independent shutdown for mute control. Use Value: Enables zero-crossing mute via SHDN1/SHDN2 with <5µs response, reducing pop/click artifacts during OS-level audio routing. |
| Set-Top Box Audio Output | Dual-Channel Transformer Driver |
Use Scenario: Delivering line-level stereo output (2Vrms) to RCA jacks in HDMI-enabled set-top boxes powered from 5V rail. IC Role / Device Role / Timing Role: Dual rail-to-rail op amp configured as unity-gain buffer with 100kΩ output impedance matching. Use Value: Maintains flat frequency response to 20kHz with <0.1dB deviation; 88dB PSRR rejects switching regulator noise from shared 5V supply. |
Use Scenario: Driving center-tapped audio transformers (600Ω primary) in professional audio interfaces requiring balanced output. IC Role / Device Role / Timing Role: Dual inverting amplifier (gain = −1) with matched input impedances to minimize common-mode distortion. Use Value: Delivers 200mW into 600Ω load using bridge configuration (two MAX4168EUB channels); 120dB open-loop gain ensures <0.005% channel-to-channel crosstalk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel precision rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4167ESD | No shutdown function; SO-8 package (larger footprint, lower thermal resistance) | Suitable where always-on operation is acceptable and board area permits SO-8 | Select when lowest cost and highest thermal performance are prioritized over power gating. |
| OPA2350UA | Lower output drive (±50mA), higher quiescent current (4.2mA), no independent shutdown pins | Better for low-noise instrumentation than high-current audio; lacks per-channel disable | Choose only if system requires <10nV/√Hz noise and can tolerate reduced drive strength and fixed power state. |
Compared with MAX4167ESD, MAX4168EUB adds independent shutdown and fits in smaller µMAX package but trades off thermal dissipation margin; versus OPA2350UA, it delivers 60% higher output current and 71% lower quiescent power, making it superior for battery-powered dual-channel audio drivers.
Availability
MAX4168EUB is available at Aetrix Electronics and suitable for portable headphone drivers, laptop audio codec buffers, and set-top box line outputs requiring stable component supply, long-term industrial availability, and guaranteed -40°C to +85°C operation.
Supply support for MAX4168EUB 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 - known for high-reliability process technology and rigorous characterization.
The MAX4165–MAX4169 family was engineered specifically for low-voltage, high-output-drive audio and signal conditioning, combining rail-to-rail I/O, shutdown control, and robust capacitive-load stability in miniature packages.
FAQ
What is the maximum capacitive load the MAX4168EUB can drive stably?
The MAX4168EUB is unity-gain stable with capacitive loads up to 250pF without external compensation. This is confirmed in the AC Electrical Characteristics table and Figure 8 (Capacitive-Load Stability) of the official datasheet. For loads exceeding 250pF, an isolation resistor (e.g., 39Ω) in series with the output restores stability, as demonstrated in Figure 10. The MAX4168EUB's internal compensation eliminates need for external poles in standard DAC buffer or headphone driver designs.
Does the MAX4168EUB support true single-supply operation down to 2.7V?
Yes, the MAX4168EUB is fully specified for single-supply operation from +2.7V to +6.5V, with rail-to-rail input common-mode range extending 0.15V beyond both rails (VEE − 0.15V to VCC + 0.15V) and output swing within 350mV of VEE at 3V supply. All key parameters - including ±80mA output drive, 5MHz GBWP, and 1.2mA supply current - are guaranteed across this range per the DC and AC Electrical Characteristics tables in the MAX4165–MAX4169 datasheet.
How does shutdown work on the MAX4168EUB, and what happens to the outputs?
The MAX4168EUB features two independent active-low shutdown pins: SHDN1 controls amplifier 1, SHDN2 controls amplifier 2. When either pin is pulled ≤0.8V (relative to VEE), the corresponding amplifier disables and its output enters a high-impedance state - confirmed in the Pin Description table and Power-Up and Shutdown Modes section. Shutdown current drops to 38µA per amplifier (VCC = 3V), and enable time is 1µs typical. The MAX4168EUB datasheet explicitly states outputs are placed in high-impedance state during shutdown.
What is the input bias current specification for the MAX4168EUB, and how does it vary?
The MAX4168EUB exhibits ±150nA maximum input bias current (IB) at +25°C and ±225nA over full −40°C to +85°C range, as specified in the DC Electrical Characteristics tables. Due to its composite PNP/NPN input stage, IB changes polarity near VCC/2 - a behavior documented in Figures 6 and 7 and Applications Information. To minimize offset error, external source impedances at IN+ and IN− should be matched, as shown in Figures 4 and 5 of the MAX4165–MAX4169 datasheet.
Can the MAX4168EUB be used in a bridge-tied load (BTL) configuration?
Yes, the MAX4168EUB is commonly used in BTL configurations - e.g., driving 32Ω speakers with 200mW output at 3V, as illustrated in Figure 3 of the datasheet. One channel operates in noninverting mode, the other in inverting mode, with identical gain-setting resistors. The dual independent shutdown pins allow synchronized mute control, and rail-to-rail output swing maximizes delivered power. Thermal derating must be observed: total dissipation must stay below 330mW (µMAX package limit at +70°C).
MAX4168EUB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- 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 (x2 Channels)
- 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:
- 10-uMAX/uSOP
MAX4168EUB FAQ
1.How can I place an order for MAX4168EUB through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4168EUB 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 MAX4168EUB reliable?
The price and inventory of MAX4168EUB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4168EUB is usually 5 days.
3.What payment methods are accepted for MAX4168EUB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4168EUB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4168EUB?
MAX4168EUB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4168EUB 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 MAX4168EUB?
For technical support, including MAX4168EUB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4168EUB requirements.
6.How does Aetrix verify that MAX4168EUB is sourced from the original manufacturer or authorized distributors?
All MAX4168EUB 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 MAX4168EUB meets industry standards.
7.What is the process for return or replacement of MAX4168EUB?
All MAX4168EUB units undergo pre-shipment inspection (PSI). If there is an issue with MAX4168EUB, 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 MAX4168EUB part is unused and in its original packaging.
Return procedure for MAX4168EUB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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