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Analog Devices Inc./Maxim Integrated MAX4246AUA+
- Part No.:
- MAX4246AUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4246AUA+.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:340
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Product details
Overview
MAX4246AUA+ from Maxim Integrated is a dual, rail-to-rail input/output operational amplifier optimized for low-power, single-supply systems. It draws 320µA per amplifier at +2.7V, operates from +2.5V to +5.5V, delivers 1MHz gain-bandwidth, and drives capacitive loads up to 470pF - enabling precision signal conditioning in portable instrumentation and sensor interfaces.
For engineers reviewing the MAX4246AUA+ datasheet, MAX4246AUA+ pinout, MAX4246AUA+ application, or MAX4246AUA+ equivalent, key selection criteria include its dual-channel configuration, absence of shutdown functionality (unlike MAX4245/MAX4247), µMAX-8 package footprint, rail-to-rail swing within 35mV of rails at 2kΩ load, and guaranteed operation from –40°C to +125°C.
Technical Context
The MAX4246AUA+ uses a BiCMOS process with composite NPN/PNP input stages to achieve rail-to-rail common-mode input range (VSS – 0.1V to VDD + 0.1V) and output swing (within 35mV of rails into 2kΩ). Its unity-gain stability extends to 470pF capacitive loads without external compensation.
No shutdown control is implemented - SHDN pins are absent in this variant. The device features 110dB open-loop gain (2kΩ load), 90dB PSRR, 80dB CMRR, and 0.4V/µs slew rate, supporting accurate DC-coupled amplification and low-distortion AC signal paths in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Amplifiers per Package | Dual - enables compact two-channel signal conditioning without discrete pairing. |
| Supply Voltage Range | +2.5V to +5.5V - supports direct connection to Li-ion, 3.3V, or 5V rails without regulation. |
| Quiescent Current (per amp) | 320µA (typ) at +2.7V - enables multi-day battery life in always-on sensor nodes. |
| Gain-Bandwidth Product | 1.0MHz - sufficient for anti-aliasing, active filtering, and sensor amplification up to ~100kHz. |
| Input Offset Voltage | ±0.4mV (max) - ensures <100µV error in 100mV full-scale measurements. |
| Capacitive-Load Stability | Up to 470pF - allows direct driving of ADC input capacitors or long PCB traces without oscillation. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial controls, and outdoor equipment. |
Pinout & Package
The MAX4246AUA+ is housed in an 8-pin µMAX package (package code U8+1), measuring 3.0mm × 3.0mm × 0.8mm with exposed pad for thermal enhancement. This RoHS-compliant, lead(Pb)-free package supports high-density layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Positive supply input - must be bypassed with 100nF capacitor to VSS for stable operation. |
| 2 | OUTB | Output of Channel B - rail-to-rail swing enables full dynamic range utilization in single-supply designs. |
| 3 | INB– | Inverting input of Channel B - matched impedance required to minimize offset from bias current mismatch. |
| 4 | INB+ | Noninverting input of Channel B - accepts common-mode voltages from VSS – 0.1V to VDD + 0.1V. |
| 5 | VSS | Ground or negative supply - reference for all inputs/outputs; must be low-impedance return path. |
| 6 | INA+ | Noninverting input of Channel A - electrically identical to INB+; supports differential or single-ended configurations. |
| 7 | INA– | Inverting input of Channel A - internal 5.3kΩ series resistors provide ESD protection up to ±2kV HBM. |
| 8 | OUTA | Output of Channel A - capable of sourcing 11mA/sinking 30mA into 2kΩ load at +5V supply. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full supply-range signal handling - critical for maximizing SNR in low-voltage ADC front-ends. |
| 1MHz GBW at 320µA | Delivers bandwidth efficiency >3.1kHz/µA - superior to most micropower op amps in its class. |
| 470pF capacitive-load drive | Eliminates need for isolation resistors when interfacing with SAR ADCs or long cables. |
| –40°C to +125°C operation | Qualified across full automotive and industrial temperature ranges without derating. |
| Low THD (0.01%) | Preserves signal fidelity in audio preamps, infrared receivers, and precision analog sensors. |
Applications
| Portable Instrumentation | Sensor Signal Conditioning |
|---|---|
Use Scenario: Battery-powered handheld multimeters and environmental monitors requiring precision DC gain and low drift. IC Role / Device Role / Timing Role: Dual-channel amplifier for simultaneous voltage/current measurement paths with matched gain and offset. Use Value: 320µA quiescent current per channel extends operating time on coin-cell batteries; rail-to-rail I/O captures full sensor output range without level-shifting. |
Use Scenario: Industrial temperature, pressure, and gas sensors feeding 12–16-bit ADCs. IC Role / Device Role / Timing Role: Low-noise, unity-gain stable buffer and programmable-gain stage before successive-approximation ADC sampling. Use Value: 470pF capacitive-load stability allows direct connection to ADC input capacitance; ±0.4mV offset minimizes calibration burden. |
| Infrared Receiver Front-End | Electronic Ignition Signal Amplification |
Use Scenario: Consumer IR remote receivers where ambient light rejection and pulse fidelity are critical. IC Role / Device Role / Timing Role: AC-coupled transimpedance amplifier and bandpass filter driver for photodiode signals. Use Value: 0.4V/µs slew rate preserves 38kHz carrier integrity; 0.01% THD prevents harmonic distortion of demodulated data pulses. |
Use Scenario: Automotive and small-engine ignition modules detecting coil primary current zero-crossings. IC Role / Device Role / Timing Role: High-CMRR differential amplifier converting noisy high-voltage coil signals into clean logic-level timing references. Use Value: 80dB CMRR rejects common-mode noise from spark events; 110dB open-loop gain ensures precise threshold detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-power op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV358IDR | Higher quiescent current (120µA per amp vs. 320µA typ), lower GBW (1MHz same), no extended temp rating (–40°C to +125°C not guaranteed). | Not qualified for automotive under-hood or industrial high-temp use; suitable for commercial-grade portable devices. | Select LMV358IDR only if cost is primary constraint and extended temperature operation is unnecessary. |
| MCP6022-I/SN | Lower input offset (±250µV max), higher supply current (1000µA per amp), same 1MHz GBW, but only rated to +85°C. | Lacks full industrial temperature support; better DC precision but sacrifices battery life and thermal robustness. | Choose MCP6022-I/SN when ultra-low offset dominates over power and temperature requirements. |
Compared with LMV358IDR and MCP6022-I/SN, the MAX4246AUA+ uniquely balances ultra-low power, full industrial temperature qualification, and proven 470pF capacitive-load stability - making it the preferred choice for space-constrained, battery-operated, and thermally demanding dual-amplifier applications.
Availability
MAX4246AUA+ is available at Aetrix Electronics and suitable for portable instrumentation, sensor signal conditioning, infrared receiver front-ends, electronic ignition modules, and industrial monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4246AUA+ 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 communications applications.
The MAX4245/MAX4246/MAX4247 family was engineered specifically for ultra-low-power, rail-to-rail signal conditioning in space- and energy-constrained systems - emphasizing quiescent current efficiency, wide supply range, and robust operation across harsh environments.
FAQ
Does the MAX4246AUA+ include a shutdown feature?
No, the MAX4246AUA+ does not include shutdown functionality. Unlike the MAX4245 and MAX4247 variants, the MAX4246AUA+ omits SHDN pins entirely. Its pinout contains only VDD, VSS, two sets of differential inputs (INA+/INA–, INB+/INB–), and two outputs (OUTA, OUTB). Shutdown capability is confirmed absent in both the ordering table and pin description sections of the official datasheet.
What is the maximum capacitive load the MAX4246AUA+ can drive without oscillation?
The MAX4246AUA+ is unity-gain stable with capacitive loads up to 470pF, as explicitly guaranteed in the Electrical Characteristics table. This specification applies across the full operating temperature range (–40°C to +125°C) and supply voltage range (+2.5V to +5.5V), enabling direct interface with typical SAR ADC input capacitances and moderate-length PCB traces without external isolation resistors.
Is the MAX4246AUA+ pin-compatible with other packages in the MAX4246 family?
No - the MAX4246AUA+ uses the 8-pin µMAX package (U8+1), while the MAX4246AKA+T uses 8-pin SOT23 and MAX4246ASA+T uses 8-pin SO. Though all share identical pin functions and numbering, their footprints differ significantly: µMAX requires a 3.0mm × 3.0mm land pattern with exposed thermal pad, whereas SOT23 and SO use larger, non-thermal-pad layouts. PCB redesign is required for package substitution.
What is the input common-mode voltage range for the MAX4246AUA+?
The MAX4246AUA+ supports an input common-mode voltage range of VSS – 0.1V to VDD + 0.1V at +25°C, and VSS to VDD over the –40°C to +85°C range (per Note 4 in the datasheet). This rail-to-rail input capability allows the device to accurately amplify signals near the supply rails - essential for single-supply sensor interfaces and zero-crossing detectors.
Can the MAX4246AUA+ operate from dual supplies?
Yes, the MAX4246AUA+ supports dual-supply operation from ±1.25V to ±2.75V, as stated in the Applications Information section. Its absolute maximum ratings allow VDD to VSS up to 6V, and its rail-to-rail input/output architecture functions symmetrically with split supplies. However, VSS must be used as the reference for all signals - not GND - especially when implementing shutdown in compatible variants.
MAX4246AUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.4V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 nA
- Voltage - Input Offset:
- 400 µV
- Current - Supply:
- 375µA (x2 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX4246AUA+ FAQ
1.How can I place an order for MAX4246AUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4246AUA+ 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 MAX4246AUA+ reliable?
The price and inventory of MAX4246AUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4246AUA+ is usually 5 days.
3.What payment methods are accepted for MAX4246AUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4246AUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4246AUA+?
MAX4246AUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4246AUA+ 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 MAX4246AUA+?
For technical support, including MAX4246AUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4246AUA+ requirements.
6.How does Aetrix verify that MAX4246AUA+ is sourced from the original manufacturer or authorized distributors?
All MAX4246AUA+ 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 MAX4246AUA+ meets industry standards.
7.What is the process for return or replacement of MAX4246AUA+?
All MAX4246AUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4246AUA+, 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 MAX4246AUA+ part is unused and in its original packaging.
Return procedure for MAX4246AUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX4246AUA+ Tags
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