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Analog Devices Inc./Maxim Integrated MAX4247AUB
- Part No.:
- MAX4247AUB
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX4247AUB.pdf
- Description:
- IC OPAMP GP 2 CIRC 10UMAX/USOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,261
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Product details
Overview
MAX4247AUB from Maxim Integrated is a dual-channel, rail-to-rail input/output operational amplifier with integrated shutdown control per channel, designed for ultra-low-power, single-supply signal conditioning in space-constrained systems. It delivers 1MHz gain-bandwidth, 320µA quiescent current per amplifier, and operates from +2.5V to +5.5V - enabling precision sensor interfacing in battery-powered infrared receivers and electronic ignition modules.
For engineers reviewing the MAX4247AUB datasheet, MAX4247AUB pinout, MAX4247AUB application, or MAX4247AUB equivalent, key selection criteria include dual-channel shutdown capability, 10-pin µMAX package footprint, rail-to-rail swing within 35mV of rails at 2kΩ load, and guaranteed operation from –40°C to +125°C in harsh environments.
Technical Context
The MAX4247AUB integrates two independent amplifiers, each with composite NPN/PNP rail-to-rail input stages enabling full VSS-to-VDD common-mode range and no phase inversion on overdrive. Its output stage drives 2kΩ loads while maintaining <60mV voltage swing from either rail across temperature.
Each channel features dedicated SHDN pins (SHDNA/SHDNB) that reduce supply current to ≤0.5µA per amplifier and place outputs in high-impedance state when pulled low. The device is unity-gain stable driving up to 470pF capacitive loads without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.5V to +5.5V single supply - supports direct connection to decaying Li-ion or alkaline battery rails without regulation. |
| Quiescent Current per Amplifier | 320µA typical at +2.7V - enables multi-year operation in always-on sensor nodes with microamp-level budgeting. |
| Shutdown Current per Amplifier | 0.05µA max - reduces total system standby power to sub-100nA when both channels disabled. |
| Gain-Bandwidth Product | 1.0MHz - sufficient for anti-aliasing, active filtering, and zero-crossing detection up to ~100kHz. |
| Input Offset Voltage | ±0.4mV typical - ensures <1mV error in 12-bit ADC front-ends with 3.3V reference. |
| Capacitive-Load Stability | 470pF - allows direct driving of long PCB traces, cables, or ADC input capacitance without isolation resistor. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial motor controls, and outdoor instrumentation. |
Pinout & Package
MAX4247AUB is housed in a 10-pin µMAX package (3.0mm × 3.0mm × 0.8mm), RoHS-compliant, with exposed pad for thermal enhancement. Pin pitch is 0.5mm; land pattern per Maxim document 90-0330.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Positive supply input - must be bypassed with 100nF capacitor to VSS for stability. |
| 2 | OUTB | Output of Channel B - high-impedance during SHDNB = low. |
| 3 | INB− | Inverting input of Channel B - protected by 5.3kΩ series resistors and triple-diode clamp. |
| 4 | INB+ | Noninverting input of Channel B - common-mode range extends to VSS and VDD rails. |
| 5 | VSS | Ground or negative supply - reference for SHDN logic and all analog signals. |
| 6 | INA+ | Noninverting input of Channel A - matched impedance critical to minimize bias-current-induced offset. |
| 7 | INA− | Inverting input of Channel A - same protection and CMR as INB±. |
| 8 | OUTA | Output of Channel A - rail-to-rail swing ≤60mV from rails into 2kΩ load. |
| 9 | SHDNA | Shutdown control for Channel A - logic low (≤0.3×VDD) disables amplifier and forces high-Z output. |
| 10 | SHDNB | Shutdown control for Channel B - independent of SHDNA; enables selective channel power gating. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Input common-mode range spans VSS −0.1V to VDD +0.1V; output swings within 35mV of rails at 2kΩ - preserves dynamic range in 3.3V or lower systems. |
| Dual independent shutdown | SHDNA/SHDNB pins allow per-channel disable - eliminates need for external MOSFET switches in multi-sensor monitoring. |
| Unity-gain stability with CLOAD ≤ 470pF | Enables direct interface to SAR ADCs (e.g., 10–14-bit) without added isolation resistor or gain error correction. |
| No phase inversion on overdrive | Prevents latch-up or false triggering in comparator-like zero-crossing applications using op-amp configurations. |
| High PSRR (90dB typ) | Maintains signal integrity when powered from noisy or unregulated supplies - e.g., switched DC-DC outputs. |
Applications
| Portable Communications | Single-Supply Zero-Crossing Detectors |
|---|---|
Use Scenario: Signal conditioning for Bluetooth LE audio codec inputs in hearing aids and wearables. IC Role / Device Role / Timing Role: Dual-channel buffer and level-shifter converting microphone AC signal to rail-to-rail range for 12-bit SAR ADC sampling. Use Value: 320µA per amplifier and shutdown mode extend battery life beyond 14 days on CR2032; 10-pin µMAX fits <4mm² PCB area. |
Use Scenario: Precision zero-crossing detection in AC line monitoring for smart energy meters. IC Role / Device Role / Timing Role: High-speed comparator substitute with hysteresis via feedback, rejecting noise below 50Hz. Use Value: No phase inversion prevents false triggers during voltage transients; 1MHz GBW ensures <1µs response to 50Hz sine wave zero crossings. |
| Electronic Ignition Modules | Sensor-Signal Detection |
Use Scenario: Amplifying Hall-effect crankshaft position signals in automotive engine control units. IC Role / Device Role / Timing Role: Dual-channel signal conditioner: one channel for raw sensor amplification, second for reference voltage buffering. Use Value: –40°C to +125°C rating matches under-hood thermal requirements; shutdown mode isolates circuits during ECU sleep states. |
Use Scenario: Low-noise amplification of thermopile IR detector outputs in contactless temperature sensors. IC Role / Device Role / Timing Role: First-stage transimpedance amplifier with rail-to-rail output driving ADC input directly. Use Value: 52nV/√Hz input voltage noise minimizes SNR degradation; 470pF capacitive-load stability avoids external compensation for detector capacitance. |
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 |
|---|---|---|---|
| MAX44267AUB+ | Higher precision (±25µV VOS), lower noise (12nV/√Hz), but 1.2mA IQ and no shutdown - consumes 3.75× more quiescent current. | Best for high-accuracy instrumentation where power is secondary; unsuitable for battery-critical designs. | Select MAX44267AUB+ only if offset voltage <±50µV and noise <20nV/√Hz are mandatory and supply current >1mA is acceptable. |
| TLV2462IDR | Lower cost, 1.2MHz GBW, but no shutdown, wider VDD range (2.7–6V), and only 8-pin SOIC/SOT23 - lacks µMAX footprint and per-channel disable. | Appropriate for cost-sensitive industrial controls with fixed 3.3V/5V rails and no need for deep sleep modes. | Choose TLV2462IDR when board space is not constrained, shutdown is unnecessary, and total BOM cost reduction outweighs feature trade-offs. |
Compared with MAX4247AUB, MAX44267AUB+ trades ultra-low power for precision and noise performance, while TLV2462IDR sacrifices shutdown and package size for cost and bandwidth - making MAX4247AUB uniquely balanced for space- and battery-limited dual-channel sensing.
Availability
MAX4247AUB is available at Aetrix Electronics and suitable for portable communications, electronic ignition modules, infrared receivers, sensor-signal detection, and single-supply zero-crossing detectors requiring stable component supply across automotive and industrial temperature ranges.
Supply support for MAX4247AUB 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 medical applications.
The MAX4245/MAX4246/MAX4247 family targets ultra-low-power, rail-to-rail signal conditioning in battery-operated and thermally harsh environments - emphasizing shutdown flexibility, small-footprint packaging, and robust parametric performance over temperature.
FAQ
What is the maximum capacitive load the MAX4247AUB can drive without oscillation?
The MAX4247AUB is unity-gain stable driving up to 470pF capacitive load, as verified in the datasheet's Electrical Characteristics table and Typical Operating Characteristics (Figure MAX4245 toc15). This specification applies to both amplifiers in the MAX4247AUB package under standard test conditions (VDD = +2.7V, TA = +25°C). Exceeding 470pF requires an isolation resistor per Figure 6a to maintain stability.
Does the MAX4247AUB support dual-supply operation?
Yes, the MAX4247AUB supports dual-supply operation from ±1.25V to ±2.75V, as stated in the Applications Information section. When used in dual-supply mode, VSS becomes the negative rail (not ground), and SHDN pins must be referenced to VSS - not GND - to ensure correct shutdown behavior. Power-supply rejection remains ≥70dB across this range.
What is the input common-mode voltage range for the MAX4247AUB at –40°C?
At –40°C, the input common-mode voltage range for the MAX4247AUB is VSS − 0.1V to VDD + 0.1V, as specified in Note 4 of the Electrical Characteristics table. This extended range is maintained across the full –40°C to +125°C operating temperature, enabling true rail-to-rail input operation even at extreme cold temperatures.
Can the MAX4247AUB's shutdown pins be left floating?
No - the MAX4247AUB's SHDNA and SHDNB pins must never be left floating. The datasheet explicitly warns that indeterminate logic levels may result, causing unpredictable amplifier enable/disable states. Each shutdown pin must be actively driven to VDD (enable) or VSS (disable); a pullup or pulldown resistor is required if controlled by open-drain logic.
What is the typical output voltage swing of the MAX4247AUB into a 2kΩ load?
The typical output voltage swing of the MAX4247AUB into a 2kΩ load is within 35mV of VDD (VOH) and within 30mV of VSS (VOL), as measured at TA = +25°C and VDD = +2.7V. These values degrade slightly at temperature extremes but remain ≤60mV from either rail across –40°C to +125°C, ensuring consistent rail-to-rail performance in wide-temperature applications.
MAX4247AUB 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:
- 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:
- 10-uMAX/uSOP
MAX4247AUB FAQ
1.How can I place an order for MAX4247AUB through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4247AUB 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 MAX4247AUB reliable?
The price and inventory of MAX4247AUB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4247AUB is usually 5 days.
3.What payment methods are accepted for MAX4247AUB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4247AUB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4247AUB?
MAX4247AUB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4247AUB 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 MAX4247AUB?
For technical support, including MAX4247AUB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4247AUB requirements.
6.How does Aetrix verify that MAX4247AUB is sourced from the original manufacturer or authorized distributors?
All MAX4247AUB 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 MAX4247AUB meets industry standards.
7.What is the process for return or replacement of MAX4247AUB?
All MAX4247AUB units undergo pre-shipment inspection (PSI). If there is an issue with MAX4247AUB, 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 MAX4247AUB part is unused and in its original packaging.
Return procedure for MAX4247AUB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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