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Analog Devices Inc./Maxim Integrated MAX4168EPD
- Part No.:
- MAX4168EPD
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX4168EPD.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,435
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Product details
Overview
MAX4168EPD from Maxim Integrated is a dual, precision, rail-to-rail input/output operational amplifier with independent active-low shutdown control per channel, 5MHz gain-bandwidth product, ±80mA output drive, and 1.2mA quiescent supply current per amplifier. It operates from +2.7V to +6.5V single supply and delivers rail-to-rail swing into 25Ω loads - ideal for dual-channel headphone drivers and low-voltage audio line drivers in space-constrained industrial and portable systems.
For engineers reviewing the MAX4168EPD datasheet, MAX4168EPD pinout, MAX4168EPD application, or MAX4168EPD equivalent, key selection criteria include dual-channel shutdown independence, guaranteed 80mA sink/source capability at VCC = 5V, rail-to-rail I/O performance over full temperature range (–40°C to +85°C), and compatibility with capacitive loads up to 250pF without external compensation.
Technical Context
The MAX4168EPD integrates two fully independent amplifiers sharing only power rails, each with dedicated SHDN1/SHDN2 inputs enabling per-channel power gating. Its rail-to-rail input stage uses complementary NPN/PNP differential pairs to extend common-mode range beyond supply rails by ±0.25V, while the output stage achieves <430mV headroom to VCC and <350mV to VEE under 25Ω load at 5V.
AC performance includes 5MHz GBWP, 21V/µs slew rate, and 0.005% channel-to-channel isolation at 10kHz. Shutdown mode reduces ICC to 38µA per amplifier (VCC = 3V), places outputs in high-impedance state, and features 1µs enable time - critical for dynamic power management in battery-powered audio subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +6.5V single supply - supports Li-ion, 3.3V, and 5V systems without level-shifting. |
| Output Drive Current | ±80mA min per amplifier - drives 32Ω headphones directly or 25Ω line loads with <1% THD+N at 1kHz. |
| Gain-Bandwidth Product | 5MHz - enables stable unity-gain buffer operation and supports audio bandwidth up to 200kHz. |
| Input Offset Voltage | 0.25mV typical (–40°C to +85°C) - ensures <1mV DC error in precision signal conditioning paths. |
| Rail-to-Rail I/O Swing | VOL ≤ 350mV, VOH ≥ VCC – 430mV @ 25Ω - maximizes dynamic range in single-supply 3.3V/5V audio stages. |
| Shutdown Current | 38µA per amplifier @ VCC = 3V - extends battery life in standby modes without external power switches. |
| PSRR / CMRR | 67dB PSRR, 71dB CMRR (–40°C to +85°C) - rejects supply noise and common-mode interference in noisy embedded environments. |
Pinout & Package
MAX4168EPD is housed in a 14-pin plastic DIP package (0.300" wide), with through-hole mounting and industry-standard footprint. Pin 1 is top-left corner when notch faces up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7 | OUT1, OUT2 | Amplifier 1 and 2 outputs - high-impedance during respective SHDN assertion; capable of ±80mA sourcing/sinking. |
| 2, 6 | IN1–, IN2– | Inverting inputs - matched impedance path; bias current ±225nA max over full temperature range. |
| 3, 5 | IN1+, IN2+ | Noninverting inputs - rail-to-rail common-mode range (VEE – 0.15V to VCC + 0.15V) enables direct sensor interfacing. |
| 4 | VEE | Negative supply - grounded for single-supply operation; reference for all input/output voltage ranges. |
| 8, 14 | SHDN1, SHDN2 | Active-low shutdown controls - independent per channel; logic threshold VIH = 2.0V, VIL = 0.8V referenced to VEE. |
| 9, 13 | IN3–, IN4– | No connection - unused pins in dual-amplifier configuration; must be left floating or tied to VEE for stability. |
| 10, 12 | IN3+, IN4+ | No connection - unused pins; no internal connection; avoid routing signals to prevent parasitic coupling. |
| 11 | VCC | Positive supply - requires 0.1µF ceramic + 1µF bulk bypassing; powers both amplifiers and shutdown logic. |
Key Features
| Feature | Design Value |
|---|---|
| Independent per-channel shutdown | Enables asymmetric power management - e.g., mute left channel while right remains active in stereo systems. |
| Rail-to-rail input common-mode range | Extends 0.15V beyond VEE/VCC - eliminates need for input biasing networks in single-supply sensor interfaces. |
| Capacitive-load stability to 250pF | Operates unconditionally stable with long PCB traces or piezo transducers without series isolation resistors. |
| No phase reversal on overdrive | Prevents latch-up or transient spikes when inputs exceed supply rails - critical for robustness in real-world audio inputs. |
| Low THD+N (0.005% @ 1kHz) | Meets Hi-Fi audio requirements for line-level buffering and DAC output stages without external filtering. |
Applications
| Portable Headphone Driver | Laptop Audio Line Output |
|---|---|
Use Scenario: Driving 16–32Ω stereo headphones from a 3.3V microcontroller-based audio subsystem. IC Role / Device Role / Timing Role: Dual-channel buffer and level shifter with independent shutdown for left/right channel muting. Use Value: Delivers >100mW per channel into 32Ω with <0.01% THD+N, eliminating need for discrete output transistors or transformers. |
Use Scenario: Low-noise line-out stage for laptop sound cards requiring 2VRMS output into 10kΩ loads. IC Role / Device Role / Timing Role: Rail-to-rail output driver with 5MHz GBWP ensuring flat frequency response up to 200kHz. Use Value: Achieves 95dB large-signal voltage gain and 88dB PSRR - suppresses digital switching noise from adjacent SoC domains. |
| Industrial Set-Top Box Audio | Automotive Hands-Free Interface |
Use Scenario: Stereo audio amplification in set-top boxes with thermal constraints and EMI-sensitive RF sections. IC Role / Device Role / Timing Role: Dual op-amp with shutdown for power cycling during HDMI hot-plug detection events. Use Value: 38µA shutdown current per channel extends standby battery life; 0.25mV offset minimizes DC pop during wake-up. |
Use Scenario: Full-duplex microphone preamp and speaker driver in car-kit systems operating from 12V DC-DC converted to 5V. IC Role / Device Role / Timing Role: Dual-channel signal conditioner with independent shutdown for mic/speaker paths during call handoff. Use Value: ±80mA drive supports 8Ω speaker loads directly; rail-to-rail I/O eliminates coupling capacitors in compact PCB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4168ESD | Same electrical specs, but in 14-pin SO package - 50% smaller footprint, surface-mount only. | Better suited for automated SMT assembly and higher-density boards; lacks through-hole mechanical retention. | Select MAX4168ESD for volume production where reflow compatibility and board space are prioritized over manual prototyping. |
| OPA2350EA/250 | Lower output drive (±50mA), no shutdown, 38MHz GBWP - optimized for high-speed precision, not power delivery. | Not suitable for headphone driving; better for sensor signal conditioning or high-frequency filtering where speed > drive matters. | Choose OPA2350EA/250 only when bandwidth >10MHz is required and load current <50mA; MAX4168EPD remains superior for audio power stages. |
Compared with MAX4168ESD, the MAX4168EPD offers identical performance with through-hole mounting for lab validation and low-volume builds; versus OPA2350EA/250, it trades bandwidth for robust output current and integrated power control - making it the preferred choice for battery-powered audio output stages requiring drive strength and efficiency.
Availability
MAX4168EPD is available at Aetrix Electronics and suitable for portable audio systems, industrial set-top boxes, and automotive hands-free kits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4168EPD 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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX4165–MAX4169 family was engineered specifically for low-voltage, battery-powered audio signal chains - emphasizing rail-to-rail operation, high output current, and ultra-low shutdown power without sacrificing DC precision.
FAQ
What is the maximum capacitive load the MAX4168EPD can drive stably?
The MAX4168EPD is unity-gain stable with capacitive loads up to 250pF without external compensation. This is verified across temperature and supply voltage ranges per the manufacturer's AC electrical characteristics table. For loads exceeding 250pF, an isolation resistor (e.g., 39Ω) in series with the output restores stability, as demonstrated in Figures 9–11 of the MAX4165–MAX4169 datasheet. The MAX4168EPD's internal compensation ensures predictable phase margin even under worst-case conditions.
Does the MAX4168EPD support dual-supply operation?
Yes, the MAX4168EPD supports dual-supply operation from ±1.35V to ±3.25V. When used in dual-supply mode, VEE becomes the negative rail (e.g., –3.25V) and VCC the positive rail (e.g., +3.25V). All specifications - including rail-to-rail input common-mode range, output swing, and shutdown behavior - remain valid. The device's absolute maximum ratings confirm ±3.25V dual supplies are within safe operating limits.
How does the shutdown function work on the MAX4168EPD?
The MAX4168EPD features two independent active-low shutdown inputs: SHDN1 (Pin 8) and SHDN2 (Pin 14). Pulling either pin below 0.8V disables its corresponding amplifier, reducing supply current to 38µA (VCC = 3V) and placing the output in high-impedance state. Both amplifiers operate normally when SHDN pins are ≥2.0V or left open. This per-channel control enables flexible power sequencing - for example, muting one channel while keeping the other active in stereo applications.
What is the guaranteed output voltage swing for the MAX4168EPD at 5V supply?
At VCC = 5V and TA = –40°C to +85°C, the MAX4168EPD guarantees VOH ≥ VCC – 430mV (i.e., ≥4.57V) and VOL ≤ 350mV into a 25Ω load referenced to VEE (ground). These values are specified in the DC Electrical Characteristics table under "Output Voltage Swing" with RL = 25Ω. Performance improves with lighter loads - e.g., into 100kΩ, swing is within 30mV of rails.
Can the MAX4168EPD drive a 32Ω headphone load directly?
Yes, the MAX4168EPD is explicitly characterized for headphone driving: its ±80mA minimum output current and rail-to-rail output swing enable direct connection to 16–32Ω loads. At 5V supply and 1kHz, THD+N is 0.005% into 32Ω, meeting Hi-Fi requirements. The device's thermal design - validated via package power dissipation equations in the Applications Information section - ensures safe operation without external heatsinking under typical audio signal conditions.
MAX4168EPD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- 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:
- 250 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:
- Through Hole
- Supplier Device Package:
- 14-PDIP
MAX4168EPD FAQ
1.How can I place an order for MAX4168EPD through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4168EPD 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 MAX4168EPD reliable?
The price and inventory of MAX4168EPD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4168EPD is usually 5 days.
3.What payment methods are accepted for MAX4168EPD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4168EPD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4168EPD?
MAX4168EPD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4168EPD 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 MAX4168EPD?
For technical support, including MAX4168EPD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4168EPD requirements.
6.How does Aetrix verify that MAX4168EPD is sourced from the original manufacturer or authorized distributors?
All MAX4168EPD 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 MAX4168EPD meets industry standards.
7.What is the process for return or replacement of MAX4168EPD?
All MAX4168EPD units undergo pre-shipment inspection (PSI). If there is an issue with MAX4168EPD, 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 MAX4168EPD part is unused and in its original packaging.
Return procedure for MAX4168EPD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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