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Analog Devices Inc./Maxim Integrated MAX4168EUB-T
- Part No.:
- MAX4168EUB-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4168EUB-T.pdf
- Description:
- IC OPAMP GP 2 CIRC 10UMAX/USOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,170
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Product details
Overview
The MAX4168EUB-T from Maxim Integrated is a dual, precision, rail-to-rail input/output operational amplifier with independent active-low shutdown control per channel, delivering ±80mA output current drive, 5MHz gain-bandwidth product, and 250µV typical input offset voltage. It operates from a single +2.7V to +6.5V supply and is optimized for high-fidelity portable audio driver stages and low-voltage battery-powered signal conditioning circuits.
For engineers reviewing the MAX4168EUB-T datasheet, MAX4168EUB-T pinout, MAX4168EUB-T application, or MAX4168EUB-T equivalent, this page provides verified DC/AC specifications, dual-channel shutdown timing behavior, rail-to-rail dynamic range validation, and real-world capacitive-load stability limits up to 250pF - all critical for headphone amplifier, transformer driver, and motor-control interface designs.
Technical Context
The MAX4168EUB-T implements a dual-channel architecture with separate SHDN1 and SHDN2 inputs enabling independent channel disable, each reducing quiescent current to 38µA (VCC = 3V) while placing its output in high-impedance state. Its rail-to-rail input stage combines NPN and PNP differential pairs to extend common-mode range beyond rails (VEE − 0.15V to VCC + 0.15V), and its output stage delivers full swing within 430mV of VCC at 25Ω load (VCC = 5V).
It features unity-gain stability with capacitive loads ≤250pF, 88dB PSRR (DC–10kHz), 120dB open-loop gain (RL = 100kΩ), and no phase reversal under overdriven inputs - making it suitable for single-supply transducer interfacing where input common-mode voltage may approach supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +6.5V single supply; supports portable systems powered by Li-ion or two alkaline cells. |
| Output Drive Current | ±80mA minimum per amplifier; sufficient to directly drive 32Ω headphones or small motors without external buffers. |
| Gain-Bandwidth Product | 5MHz; enables stable closed-loop gain ≥10 at audio frequencies up to 500kHz. |
| Input Offset Voltage | 0.35mV typical (EUB grade); ensures <1mV DC error in precision sensor buffering or DAC output stages. |
| Shutdown Supply Current | 38µA per amplifier at VCC = 3V; extends battery life in always-on audio subsystems with intermittent use. |
| Rail-to-Rail I/O Swing | VOUT swings within 25mV of VEE and 30mV of VCC (RL = 100kΩ); maximizes dynamic range in low-voltage signal chains. |
| Capacitive Load Stability | Stable with ≤250pF; eliminates need for isolation resistors in most PCB layouts with trace capacitance or ceramic filters. |
Pinout & Package
MAX4168EUB-T is housed in a 10-pin µMAX package (3.0mm × 5.0mm, 0.8mm height), pin-compatible with industry-standard 10L µMAX footprint. The device integrates two independent op amps with dedicated shutdown controls and shared power rails.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Amplifier 1 output; capable of sourcing/sinking ±80mA into loads referenced to VEE or VCC. |
| 2 | IN1− | Inverting input of Amplifier 1; part of rail-to-rail input pair with IN1+; protected by 1kΩ series resistors. |
| 3 | IN1+ | Noninverting input of Amplifier 1; accepts common-mode voltages from VEE − 0.15V to VCC + 0.15V. |
| 4 | VEE | Negative supply / ground reference; must be connected to system ground in single-supply operation. |
| 5 | VCC | Positive supply input; bypass with 0.1µF ceramic + 1µF bulk capacitor for low-noise audio performance. |
| 6 | IN2+ | Noninverting input of Amplifier 2; electrically identical to IN1+; enables dual-channel signal processing. |
| 7 | IN2− | Inverting input of Amplifier 2; matched to IN1− for consistent AC/DC performance across both channels. |
| 8 | OUT2 | Amplifier 2 output; independently controllable via SHDN2; supports bridge-tied load (BTL) configurations. |
| 9 | SHDN2 | Active-low shutdown enable for Amplifier 2; logic threshold VIH = 2.0V, VIL = 0.8V (referenced to VEE). |
| 10 | SHDN1 | Active-low shutdown enable for Amplifier 1; allows selective channel power gating without affecting OUT2. |
Key Features
| Feature | Design Value |
|---|---|
| High-output-drive capability | Guaranteed ±80mA per channel enables direct 32Ω headphone driving without external MOSFETs or transformers. |
| Rail-to-rail input common-mode range | Extends 0.15V beyond supply rails (VEE − 0.15V to VCC + 0.15V), supporting true single-supply sensor interfaces. |
| Independent dual-channel shutdown | SHDN1/SHDN2 allow per-amplifier power gating - critical for adaptive audio channel muting or power sequencing. |
| No phase reversal on overdrive | Prevents latch-up or uncontrolled output slewing when inputs exceed common-mode range - improves system robustness. |
| Capacitive-load tolerance | Stable with up to 250pF; accommodates typical PCB trace capacitance and ceramic filter networks without compensation. |
| Low input offset voltage drift | ±3µV/°C tempco ensures <1.5mV total offset shift over −40°C to +85°C - essential for precision analog front-ends. |
Applications
| Portable Headphone Driver | Laptop Audio Line-Out Stage |
|---|---|
|
Use Scenario: Driving stereo 32Ω headphones from a 3.3V or 5V USB-powered DAC output. IC Role / Device Role / Timing Role: Dual-channel buffer and level shifter providing rail-to-rail output swing and low THD+N (<0.02% at 1kHz). Use Value: Eliminates coupling capacitors and reduces BOM count by enabling true DC-coupled headphone output with <10mV residual offset. |
Use Scenario: Boosting line-level signals from codec outputs to drive external speakers or docking station audio jacks. IC Role / Device Role / Timing Role: High-current, low-noise dual op amp configured as noninverting amplifier (gain = 2–4) with shutdown during sleep mode. Use Value: Delivers >150mW into 32Ω with <0.03% THD+N at 1kHz and fast 5µs wake-up time from shutdown - meeting Intel Audio Precision requirements. |
| Bridge-Tied Load (BTL) Motor Driver | Digital-to-Analog Converter Buffer |
|
Use Scenario: Implementing compact 3V BTL amplifier for micro-vibration motors or piezo actuators in wearables. IC Role / Device Role / Timing Role: Dual op amp in inverting/noninverting configuration generating complementary outputs for zero-DC-bias motor drive. Use Value: Achieves 200mW output at 3V with <10mV DC offset across speaker terminals - eliminating need for large DC-blocking capacitors. |
Use Scenario: Buffering 16-bit DAC outputs in industrial data acquisition systems requiring low glitch energy and high DC accuracy. IC Role / Device Role / Timing Role: Precision unity-gain follower with 250µV offset and 120dB open-loop gain to preserve DAC resolution. Use Value: Maintains 16-bit monotonicity and <1LSB integral nonlinearity error over temperature due to low offset drift and high PSRR (86dB). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4167ESA | No shutdown function; 8-pin SO package; same GBWP, offset, and drive capability. | Suitable only where continuous operation is required; lacks per-channel power gating. | Select when board space permits larger SO-8 and shutdown is unnecessary for system power budget. |
| OPA2350UA | Single-supply rail-to-rail I/O; 38MHz GBWP; lower 4.5mA ICC; no shutdown; SO-8 package. | Better bandwidth but lower output current (±50mA); not qualified for >85°C operation. | Choose for higher-frequency signal conditioning where drive strength <80mA is acceptable and extended temp range is not needed. |
Compared with MAX4167ESA and OPA2350UA, the MAX4168EUB-T uniquely combines dual-channel independent shutdown, guaranteed ±80mA drive, and −40°C to +85°C qualification in a compact 10-pin µMAX - making it the only option for space-constrained, battery-sensitive dual-audio-path designs requiring per-channel power control.
Availability
MAX4168EUB-T is available at Aetrix Electronics and suitable for portable audio systems, laptop audio subsystems, and industrial DAC buffering applications requiring stable component supply, long-term lifecycle support, and guaranteed −40°C to +85°C operation.
Supply support for MAX4168EUB-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 and mixed-signal ICs for demanding industrial, automotive, and consumer applications, with emphasis on low-power, high-accuracy signal conditioning.
The MAX4165–MAX4169 family was engineered specifically for single-supply, battery-operated audio and transducer driver applications - prioritizing rail-to-rail I/O, high output current, and ultra-low shutdown current without sacrificing DC precision.
FAQ
What is the maximum capacitive load the MAX4168EUB-T can drive stably?
The MAX4168EUB-T is unity-gain stable with capacitive loads up to 250pF when driving resistive loads ≥100Ω. This specification is validated across temperature and supply voltage ranges and eliminates the need for output isolation resistors in most PCB layouts - including those with ceramic decoupling caps or EMI filters near the output node. Exceeding 250pF requires external compensation per Figure 11 in the MAX4168EUB-T datasheet.
Does the MAX4168EUB-T support true rail-to-rail input operation below the negative rail?
Yes - the MAX4168EUB-T's rail-to-rail input stage extends the common-mode voltage range to VEE − 0.15V at −40°C to +85°C, allowing inputs as low as −150mV when VEE = 0V. This enables accurate sensing of signals near ground in single-supply systems, such as current-sense amplifier outputs or thermistor bridges biased at mid-supply.
How does shutdown behavior differ between the two amplifiers in the MAX4168EUB-T?
Each amplifier in the MAX4168EUB-T has an independent shutdown input: SHDN1 controls Amplifier 1 and SHDN2 controls Amplifier 2. Pulling either pin low (≤0.8V) disables its respective amplifier, reducing its supply current to 38µA (VCC = 3V) and placing its output in high-impedance state - with no effect on the other channel's operation or bias conditions.
What is the typical output voltage swing of the MAX4168EUB-T into a 25Ω load at VCC = 5V?
At VCC = 5V and RL = 25Ω, the MAX4168EUB-T guarantees an output voltage swing of VCC − VOH ≤ 430mV and VOL − VEE ≤ 350mV - meaning the output can reach within 430mV of the positive rail and 350mV of ground. This is confirmed in the DC Electrical Characteristics table under "Output Voltage Swing" with test condition RL = 25Ω.
Is the MAX4168EUB-T pin-compatible with other devices in the MAX4165–MAX4169 family?
No - the MAX4168EUB-T uses a 10-pin µMAX package with dedicated SHDN1/SHDN2 pins, while MAX4167 (dual, no shutdown) uses 8-pin SO/DIP and MAX4169 (quad) uses 14-pin packages. Pin mapping differs significantly across variants; the MAX4168EUB-T is only pin-compatible with other MAX4168 variants in µMAX (e.g., MAX4168EPD, MAX4168ESD) but not with MAX4165, MAX4166, or MAX4167.
MAX4168EUB-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for MAX4168EUB-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4168EUB-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 MAX4168EUB-T reliable?
The price and inventory of MAX4168EUB-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4168EUB-T is usually 5 days.
3.What payment methods are accepted for MAX4168EUB-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4168EUB-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4168EUB-T?
MAX4168EUB-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4168EUB-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 MAX4168EUB-T?
For technical support, including MAX4168EUB-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4168EUB-T requirements.
6.How does Aetrix verify that MAX4168EUB-T is sourced from the original manufacturer or authorized distributors?
All MAX4168EUB-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 MAX4168EUB-T meets industry standards.
7.What is the process for return or replacement of MAX4168EUB-T?
All MAX4168EUB-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4168EUB-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 MAX4168EUB-T part is unused and in its original packaging.
Return procedure for MAX4168EUB-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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