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Analog Devices Inc./Maxim Integrated MAX4246AKA+T
- Part No.:
- MAX4246AKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8
- Datasheet:
-
MAX4246AKA+T.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:15,797
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Product details
Overview
MAX4246AKA+T from Maxim Integrated is a dual, rail-to-rail input/output operational amplifier optimized for low-power, single-supply operation across -40°C to +125°C. It draws 320µA per amplifier at +2.7V, delivers 1MHz gain-bandwidth, and drives capacitive loads up to 470pF while maintaining unity-gain stability - ideal for battery-powered sensor-signal conditioning in harsh automotive or industrial environments.
For engineers reviewing the MAX4246AKA+T datasheet, MAX4246AKA+T pinout, MAX4246AKA+T application, or MAX4246AKA+T equivalent, key selection criteria include its 8-pin SOT23 package, absence of shutdown functionality (distinguishing it from MAX4245/MAX4247), rail-to-rail swing within 35mV of rails into 2kΩ, and guaranteed performance over extended temperature range without derating.
Technical Context
The MAX4246AKA+T implements a composite NPN/PNP rail-to-rail input stage enabling full VSS-to-VDD common-mode range, with crossover centered at mid-supply. Its output stage achieves <35mV swing to both rails under 2kΩ load, supporting precision zero-crossing detection and single-supply signal buffering.
No shutdown control is integrated - unlike MAX4245/MAX4247 variants - eliminating SHDN pin dependencies and simplifying biasing in always-on monitoring circuits. The device is unity-gain stable with CLOAD ≤ 470pF, avoiding external isolation resistors in most capacitive interface applications.
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 - extends battery life in portable instrumentation and remote sensors. |
| Gain-Bandwidth Product | 1.0MHz - sufficient for DC–100kHz sensor amplification and active filtering. |
| Input Offset Voltage | ±0.4mV (max) - ensures <1mV error in 12-bit ADC front-ends with 2.5V reference. |
| Capacitive-Load Stability | 470pF (guaranteed) - allows direct driving of long traces, cables, or ADC input capacitance without oscillation. |
| Operating Temperature | -40°C to +125°C - qualified for under-hood automotive, industrial PLC, and engine control modules. |
Pinout & Package
MAX4246AKA+T is housed in an 8-pin SOT23 package (package code K8+5), footprint-compatible with industry-standard SO-8 but with 50% smaller board area and lower thermal resistance than SO packages.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Positive supply input - must be bypassed with 100nF capacitor to VSS for noise immunity. |
| 2 | OUTB | Output of Channel B - rail-to-rail swing supports direct interface to SAR ADCs or comparators. |
| 3 | INB− | Inverting input of Channel B - matched impedance critical to minimize offset due to ±10nA input bias current. |
| 4 | INB+ | Noninverting input of Channel B - full rail-to-rail common-mode range (VSS to VDD) enables single-supply transducer interfacing. |
| 5 | VSS | Ground/negative supply - serves as reference for both amplifiers and SHDN logic (not present on this variant). |
| 6 | INA+ | Noninverting input of Channel A - electrically identical to INB+; supports differential pair or independent channel use. |
| 7 | INA− | Inverting input of Channel A - internal 5.3kΩ series resistors and triple-diode protection enable ±10V transient tolerance. |
| 8 | OUTA | Output of Channel A - capable of sourcing 11mA/sinking 30mA, suitable for driving LEDs or small MOSFET gates. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full dynamic range utilization in single-supply systems - e.g., 0–3.3V output swing with 3.3V VDD. |
| 1MHz GBW at 320µA | Delivers bandwidth-per-power ratio >3.1kHz/µA - superior to legacy low-power op amps like LMV358. |
| 470pF capacitive-load drive | Eliminates need for isolation resistors when interfacing to 12-bit+ ADCs with >10pF input capacitance. |
| ±0.4mV max VOS | Reduces calibration overhead in precision thermistor or strain-gauge amplifiers operating at 25°C. |
| -40°C to +125°C operation | Qualified for automotive Grade 2 and industrial Class I environments without derating or thermal management. |
Applications
| Portable Communications | Single-Supply Zero-Crossing Detectors |
|---|---|
Use Scenario: Signal conditioning for Bluetooth/Wi-Fi RF front-end RSSI monitoring in handheld devices. IC Role / Device Role / Timing Role: Dual-channel amplifier providing gain and level-shifting for envelope detection before ADC sampling. Use Value: Rail-to-rail output swing preserves SNR across full 0–3.3V ADC input range; 320µA quiescent current minimizes impact on standby battery drain. | Use Scenario: Detecting AC waveform polarity transitions in motor phase-current sensing or audio line-level inputs. IC Role / Device Role / Timing Role: Configured as comparator with hysteresis, using one amplifier channel for threshold generation and the other for comparison. Use Value: No phase inversion on overdriven inputs prevents false triggering; 1MHz GBW ensures <1µs response to fast zero-cross events. |
| Infrared Receivers | Sensor-Signal Detection |
Use Scenario: Amplifying weak, high-impedance photodiode signals in IR remote receivers or proximity sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) front-end with feedback resistor and capacitor for ambient-light rejection. Use Value: 52nV/√Hz input voltage noise and ±10nA input bias current preserve signal integrity from pA-level photocurrents. | Use Scenario: Conditioning outputs from MEMS accelerometers, pressure transducers, or RTDs in industrial IoT nodes. IC Role / Device Role / Timing Role: Dual-channel signal chain: one amp for sensor excitation/buffering, second for gain/offset adjustment prior to ADC. Use Value: Matched channel specifications ensure consistent gain and offset across temperature; 125°C rating supports deployment near heat sources. |
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 | Wider supply range (2.7–5.5V), higher quiescent current (120µA per amp), no guaranteed 125°C operation. | Limited to commercial/industrial temp range (−40°C to +85°C); unsuitable for under-hood automotive use. | Select when cost sensitivity outweighs extended temperature requirement and ultra-low power is not critical. |
| MCP6022-E/SN | Higher GBW (10MHz), higher supply current (1mA per amp), rail-to-rail output only (not input). | Superior speed for active filters but consumes >3× more current; input CM range limited to VSS+0.3V to VDD−0.1V. | Choose for bandwidth-critical designs where power budget allows and rail-to-rail input is not required. |
Compared with LMV358IDR and MCP6022-E/SN, the MAX4246AKA+T uniquely balances ultra-low quiescent current, full rail-to-rail I/O, and guaranteed −40°C to +125°C operation in an 8-pin SOT23 - making it the optimal choice for space-constrained, battery-powered, high-reliability sensor nodes.
Availability
MAX4246AKA+T is available at Aetrix Electronics and suitable for portable communications, infrared receivers, sensor-signal detection, electronic ignition modules, and single-supply zero-crossing detectors requiring stable component supply across automotive and industrial lifecycles.
Supply support for MAX4246AKA+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, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications.
The MAX4245/MAX4246/MAX4247 family targets ultra-low-power, rail-to-rail signal conditioning in space- and energy-constrained systems - especially where extended temperature operation and minimal PCB footprint are critical.
FAQ
Does MAX4246AKA+T include a shutdown pin?
No, MAX4246AKA+T does not feature a shutdown function. Unlike MAX4245 and MAX4247 variants, this dual op amp lacks SHDN pins - confirmed by its pin configuration table and electrical characteristics section, which omits shutdown-related parameters. The MAX4246AKA+T is designed for always-on operation in continuous-monitoring applications.
What is the maximum capacitive load the MAX4246AKA+T can drive without oscillation?
The MAX4246AKA+T is unity-gain stable with capacitive loads up to 470pF, as explicitly guaranteed in the Electrical Characteristics table. This specification applies across the full −40°C to +125°C temperature range and +2.5V to +5.5V supply range, enabling direct interface to ADCs, long PCB traces, or cable-driven loads without external isolation components.
Is MAX4246AKA+T compatible with single-supply or dual-supply operation?
Yes, MAX4246AKA+T supports both configurations: single supply from +2.5V to +5.5V (VSS = ground) or dual supply from ±1.25V to ±2.75V (VSS = negative rail). Its rail-to-rail input and output stages operate across the full common-mode range (VSS to VDD), making it suitable for either architecture without performance degradation.
What package type and footprint does MAX4246AKA+T use?
MAX4246AKA+T uses an 8-pin SOT23 package (package code K8+5), with land pattern documented in Maxim's package drawing 90-0176. It measures 2.9mm × 1.6mm × 1.1mm and is RoHS-compliant (denoted by "+" suffix). This compact outline saves >50% board area versus SO-8 while maintaining thermal performance suitable for high-density layouts.
How does the input protection circuitry of MAX4246AKA+T affect system design?
MAX4246AKA+T integrates 5.3kΩ series resistors and back-to-back triple-diode stacks at each input, providing ±10V transient tolerance. For differential voltages <2.1V, input resistance remains ~4MΩ; above that, resistance drops to ~10.6kΩ. Designers must account for this nonlinear behavior in high-impedance sensor interfaces to avoid bias-current-induced offset errors.
MAX4246AKA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-8
- Packaging:
- Tape & Reel (TR)
- 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:
- SOT-23-8
MAX4246AKA+T FAQ
1.How can I place an order for MAX4246AKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4246AKA+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 MAX4246AKA+T reliable?
The price and inventory of MAX4246AKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4246AKA+T is usually 5 days.
3.What payment methods are accepted for MAX4246AKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4246AKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4246AKA+T?
MAX4246AKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4246AKA+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 MAX4246AKA+T?
For technical support, including MAX4246AKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4246AKA+T requirements.
6.How does Aetrix verify that MAX4246AKA+T is sourced from the original manufacturer or authorized distributors?
All MAX4246AKA+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 MAX4246AKA+T meets industry standards.
7.What is the process for return or replacement of MAX4246AKA+T?
All MAX4246AKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4246AKA+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 MAX4246AKA+T part is unused and in its original packaging.
Return procedure for MAX4246AKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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