My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX4168ESD
- Part No.:
- MAX4168ESD
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4168ESD.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,039
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX4168ESD 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, and 1.2mA quiescent supply current per amplifier. It operates from a single +2.7V to +6.5V supply and is specified for -40°C to +85°C industrial temperature range in 14-pin SO package - ideal for dual-channel headphone driver or portable audio line-driver applications.
For engineers reviewing the MAX4168ESD datasheet, MAX4168ESD pinout, MAX4168ESD application, or MAX4168ESD equivalent, key selection criteria include dual-channel shutdown independence, rail-to-rail I/O swing under 25Ω load, 250µV max input offset voltage (typ), capacitive-load stability up to 250pF, and guaranteed ±80mA output sourcing/sinking capability at VCC = 5V.
Technical Context
The MAX4168ESD integrates two fully independent op-amp channels, each with separate 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 rails (VEE − 0.25V to VCC + 0.25V), while the output stage delivers full swing within 430mV of VCC and 160mV of VEE into 25Ω loads.
Each amplifier features unity-gain stability with capacitive loads ≤250pF, no phase reversal on overdriven inputs, and low 26nV/√Hz input voltage noise. The device maintains ≥71dB CMRR and ≥67dB PSRR across the full industrial temperature range, supporting precision signal conditioning in battery-powered systems.
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 system rails without level-shifting. |
| Gain-Bandwidth Product | 5MHz - enables stable unity-gain buffer operation and bandwidth-critical audio filtering up to ~1MHz. |
| Output Drive Current | ±80mA min per amplifier - drives 32Ω headphones directly or 25Ω transformer/line loads without external buffers. |
| Input Offset Voltage | 0.25mV typ / 1.0mV max (−40°C to +85°C) - ensures <1mV DC error in precision sensor or DAC output buffering. |
| Rail-to-Rail I/O Swing | VOL ≤ 160mV @ 25Ω sink, VOH ≥ VCC − 430mV @ 25Ω source - delivers >90% of full supply swing into real-world loads. |
| Shutdown Current | 38µA per amplifier (VCC = 3V) - reduces total system standby power by >97% vs active mode (1.2mA). |
| Capacitive Load Stability | Stable up to 250pF - eliminates need for isolation resistors in most PCB layouts with long traces or ADC input caps. |
Pinout & Package
MAX4168ESD is housed in a 14-pin SO (Small Outline) package with standard 1.27mm pitch, JEDEC MS-012AC compliant, 8.65mm × 3.91mm footprint, and exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7 | OUT1, OUT2 | Amplifier 1 and 2 outputs - high-current, rail-to-rail capable; placed in high-impedance state during respective SHDN assertion. |
| 2, 6 | IN1−, IN2− | Inverting inputs - matched pair for differential gain setting; protected by 1kΩ series resistors and back-to-back diodes. |
| 3, 5 | IN1+, IN2+ | Noninverting inputs - support rail-to-rail common-mode range (VEE − 0.25V to VCC + 0.25V); low bias current (±50nA typ). |
| 4 | VEE | Negative supply / ground reference - must be connected to system GND in single-supply configurations. |
| 8 | VCC | Positive supply - bypass with 0.1µF ceramic + 1µF bulk capacitor close to pin for stable high-current switching. |
| 9, 13 | SHDN1, SHDN2 | Active-low shutdown controls - independently disable Amp1/Amp2; logic threshold VIH = 2.0V, VIL = 0.8V (referenced to VEE). |
| 10, 12 | IN3+, IN4+ | No connection - unused pins in dual-channel MAX4168; must be left floating or tied to GND (not VCC). |
| 11, 14 | IN3−, IN4− | No connection - reserved for quad-channel MAX4169; electrically isolated in MAX4168ESD. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent shutdown | Per-amplifier SHDN1/SHDN2 enables selective channel disabling - critical for dynamic power management in stereo audio paths. |
| Rail-to-rail input stage | Common-mode range extends 0.25V beyond VEE and VCC - allows direct interfacing with 0–VCC DACs or sensors without level-shifting. |
| High-output-current drive | Guaranteed ±80mA per channel into 25Ω - eliminates need for discrete output transistors in speaker/headphone drivers. |
| No phase reversal | Input overdrive tolerance prevents output latch-up or polarity inversion - essential for robust signal integrity in transient-heavy environments. |
| Low input offset drift | ±3µV/°C tempco - maintains <10µV offset shift over full −40°C to +85°C range, reducing calibration burden in precision instrumentation. |
Applications
| Portable Headphone Driver | Stereo Line Driver |
|---|---|
Use Scenario: Driving 16–32Ω stereo headphones from a 3.3V or 5V portable media player with minimal external components. IC Role / Device Role / Timing Role: Dual-channel op-amp configured as non-inverting buffers with gain = 1, using internal rail-to-rail I/O to maximize dynamic range. Use Value: Delivers >100mW per channel into 32Ω loads with <0.02% THD+N at 1kHz, eliminating external MOSFET stages and reducing BOM count by 4+ parts. | Use Scenario: Buffering stereo DAC outputs to line-level consumer audio equipment (e.g., sound cards, set-top boxes) with DC-coupled interface. IC Role / Device Role / Timing Role: Dual op-amp used as unity-gain voltage followers with 100kΩ input impedance and <10mV output DC offset. Use Value: Maintains full 20Hz–20kHz audio bandwidth with <250µV offset error, enabling true DC-coupled analog signal chain without coupling capacitors. |
| Bridge-Tied Load (BTL) Amplifier | Transformer/Line Driver |
Use Scenario: Implementing 200mW 3V BTL amplifier in space-constrained IoT audio modules using dual MAX4168ESD channels. IC Role / Device Role / Timing Role: Two amplifiers configured in anti-phase with shared feedback to drive differential load across speaker terminals. Use Value: Achieves 2× output voltage swing vs single-ended drive - delivers 200mW into 32Ω at 3V supply with <10mV DC offset at speaker center tap. | Use Scenario: Driving 600Ω balanced/unbalanced audio lines or RF transformer inputs in telecom or broadcast interfaces. IC Role / Device Role / Timing Role: Dual op-amp operating in inverting configuration with precise gain-setting resistors and 25Ω output termination. Use Value: Sustains ±80mA peak current into reactive loads while maintaining <0.5dB gain flatness from 10Hz to 100kHz, meeting AES3 and EBU standards. |
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 |
|---|---|---|---|
| MAX44248AUA+ | Single-supply, rail-to-rail I/O, 10MHz GBW, 1.8mA ICC, but only 30mA output drive and no shutdown. | Lacks per-channel shutdown and insufficient output current for headphone driving; better suited for low-power sensor signal conditioning. | Select when higher bandwidth and lower noise (11nV/√Hz) outweigh drive strength and power gating needs. |
| OPA2991IDR | 2.7–36V supply, 100mA output, rail-to-rail I/O, 4.2MHz GBW, but no shutdown and 1.25mV max VOS (vs 1.0mV for MAX4168ESD). | Wider supply range suits industrial 24V systems, but higher offset and no shutdown limit use in portable battery designs. | Prefer for high-voltage analog front-ends where shutdown is unnecessary and 100mA drive is required. |
Compared with MAX44248AUA+ and OPA2991IDR, the MAX4168ESD uniquely combines dual-channel independent shutdown, ±80mA drive, and sub-1mV offset in a 14-pin SO package - making it the only option among the three qualified for battery-powered stereo headphone drivers requiring dynamic power control.
Availability
MAX4168ESD is available at Aetrix Electronics and suitable for portable audio systems, industrial sensor signal conditioning, and battery-powered instrumentation requiring stable component supply, extended temperature operation, and dual-channel power management.
Supply support for MAX4168ESD 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 designed specifically for low-voltage, battery-powered audio and signal-path applications demanding precision, high output current, rail-to-rail operation, and intelligent power control - with MAX4168ESD targeting dual-channel implementations.
FAQ
What is the maximum capacitive load the MAX4168ESD can drive stably?
The MAX4168ESD 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) in series with the output restores phase margin. This capability eliminates external compensation in most PCB layouts with ADC input capacitors or long interconnects, simplifying design for audio and data-acquisition systems using the MAX4168ESD.
Does the MAX4168ESD support true single-supply operation with rail-to-rail input and output?
Yes, the MAX4168ESD supports true single-supply operation from +2.7V to +6.5V with rail-to-rail input common-mode range (VEE − 0.25V to VCC + 0.25V) and rail-to-rail output swing (within 160mV of VEE and 430mV of VCC into 25Ω). This enables direct interfacing with 0–VCC DACs, sensors, and ADCs without level-shifting circuitry - a core design feature confirmed in the MAX4168ESD datasheet's Typical Operating Characteristics and Absolute Maximum Ratings sections.
How does the shutdown function work on the MAX4168ESD?
The MAX4168ESD features two independent active-low shutdown inputs: SHDN1 (Pin 9) controls Amplifier 1, and SHDN2 (Pin 13) controls Amplifier 2. Driving either pin below 0.8V disables its respective amplifier, reducing supply current to 38µA (VCC = 3V) and placing the output in high-impedance state. Pulling the pin ≥2.0V or leaving it open enables normal operation. This per-channel control is unique to the MAX4168ESD within its family and enables fine-grained power management in stereo audio paths.
What is the typical input offset voltage of the MAX4168ESD over temperature?
The MAX4168ESD has a typical input offset voltage of 0.25mV at +25°C and a maximum of 1.0mV across the full −40°C to +85°C industrial temperature range. Its offset-voltage tempco is ±3µV/°C, resulting in <10µV total drift over the entire range. This performance is verified in the DC Electrical Characteristics table for MAX416_ESD variants and makes the MAX4168ESD suitable for precision applications like DAC output buffering and sensor signal conditioning where DC accuracy is critical.
Can the MAX4168ESD drive a 32Ω headphone load directly?
Yes, the MAX4168ESD is explicitly characterized to deliver ±80mA output current per channel, which exceeds the peak current required for 32Ω headphones at typical line-level voltages (e.g., 1Vrms ≈ ±44mA). Application circuits in the MAX4168ESD datasheet demonstrate direct 32Ω driving with <0.02% THD+N at 1kHz and full rail-to-rail swing. Thermal derating must be observed: at 3V supply and 32Ω load, power dissipation remains within the 14-pin SO package's 667mW limit, confirming safe direct-drive capability for the MAX4168ESD.
MAX4168ESD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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:
- 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:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
MAX4168ESD FAQ
1.How can I place an order for MAX4168ESD through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4168ESD 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 MAX4168ESD reliable?
The price and inventory of MAX4168ESD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4168ESD is usually 5 days.
3.What payment methods are accepted for MAX4168ESD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4168ESD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4168ESD?
MAX4168ESD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4168ESD 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 MAX4168ESD?
For technical support, including MAX4168ESD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4168ESD requirements.
6.How does Aetrix verify that MAX4168ESD is sourced from the original manufacturer or authorized distributors?
All MAX4168ESD 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 MAX4168ESD meets industry standards.
7.What is the process for return or replacement of MAX4168ESD?
All MAX4168ESD units undergo pre-shipment inspection (PSI). If there is an issue with MAX4168ESD, 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 MAX4168ESD part is unused and in its original packaging.
Return procedure for MAX4168ESD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4168ESD 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…
