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Analog Devices Inc./Maxim Integrated MAX44284EAWT+T
- Part No.:
- MAX44284EAWT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-WFBGA, WLBGA
- Datasheet:
-
MAX44284EAWT+T.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 6WLP
- Quantity:
- Payment:
- Shipping:
Inventory:205
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Product details
Overview
MAX44284EAWT+T from Analog Devices is a high-side current-sense amplifier with 500V/V fixed gain, -0.1V to +36V input common-mode range, 21µA quiescent current, ±15µV (typ) input offset voltage at +25°C, and 0.05% (typ) gain error - designed for precision DC-DC current sensing in battery-powered systems.
For engineers reviewing the MAX44284EAWT+T datasheet, MAX44284EAWT+T pinout, MAX44284EAWT+T application, or MAX44284EAWT+T equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options for automotive-grade, low-power current monitoring.
Technical Context
The MAX44284EAWT+T implements a capacitive-coupled chopper instrumentation amplifier (CCIA) architecture to achieve ultra-low offset drift (50nV/°C) and maintain accuracy across -40°C to +125°C. Its input stage operates independently of VDD, enabling true high-side sensing even when VCM extends 0.1V below ground.
This variant supports only 500V/V gain, delivering 0.4kHz small-signal bandwidth and 4ms settling time (12-bit) from 250mV to 2.5V. It features an active-low SHDN pin that reduces supply current to ≤0.8µA while preserving rail-to-rail output capability after wake-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 500V/V - scales 3.4mV full-scale sense voltage to 1.7V output at VDD = 1.7V; enables use of sub-10mΩ sense resistors. |
| Input Common-Mode Range | -0.1V to +36V - supports high-side sensing on 36V rails and bidirectional operation down to -0.1V relative to GND. |
| Quiescent Current | 21µA (typ) - extends battery life in portable medical and handheld devices without sacrificing precision. |
| Input Offset Voltage | ±15µV (typ, +25°C); ±40µV (max, -40°C to +125°C) - ensures <0.1% measurement error with 10mΩ/1A sense resistor. |
| Gain Error | 0.05% (typ, +25°C); 0.39% (max, -40°C to +125°C) - maintains calibration integrity over full automotive temperature range. |
| Supply Voltage Range | 1.7V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), 3.3V logic, and 5V system rails. |
| Shutdown Current | ≤0.8µA - reduces power consumption by >96% vs. active mode; independent of VDD for flexible control. |
Pinout & Package
MAX44284EAWT+T is packaged in a 6-bump, 0.4mm-pitch Wafer-Level Package (WLP), measuring 1.3mm × 0.9mm - optimized for space-constrained portable electronics and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Power-supply input | Accepts 1.7V–5.5V; requires local 0.1µF + 4.7µF bypassing to minimize PSRR degradation. |
| GND (Pin 2) | Reference ground | Return path for VDD and output stage; must be connected directly to low-impedance system ground plane. |
| RS+ (Pin 3) | High-side sense input | Connects to power rail side of current-sense resistor; tolerates -0.3V to +40V absolute rating. |
| RS- (Pin 4) | Low-side sense input | Connects to load side of sense resistor; common-mode range extends to -0.1V for ground-referenced sensing. |
| OUT (Pin 5) | Voltage output | Rail-to-rail output (0.3mV to VDD–25mV); drives 10kΩ loads directly; stable with ≤500pF capacitance. |
| SHDN (Pin 6) | Active-low shutdown control | Pulled high to VDD for normal operation; driven low (<0.55V) to enter ultra-low-power shutdown mode. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive-coupled chopper architecture | Enables 50nV/°C offset drift and eliminates 1/f noise - critical for stable long-term current monitoring in infusion pumps. |
| Wide input common-mode range (-0.1V to +36V) | Supports both high-side and low-side configurations without external level-shifting circuitry or supply dependency. |
| Four factory-set gain options | 500V/V gain (MAX44284E) eliminates external gain-setting resistors - reduces BOM count and layout sensitivity in compact designs. |
| Independent shutdown control | SHDN pin functions regardless of VDD state - allows system-level power sequencing where VDD may be unpowered during sleep. |
| Automotive-grade temperature range | Specified from -40°C to +125°C - qualified for under-hood and infotainment applications requiring AEC-Q100 alignment. |
Applications
| Smartphone Battery Monitoring | Medical Infusion Pump Current Sensing |
|---|---|
Use Scenario: Real-time battery discharge/charge current measurement in slim-profile smartphones with dual-cell Li-ion packs. IC Role / Device Role / Timing Role: High-side current-sense amplifier converting mV-level sense voltage into precise 0–3.3V analog output for ADC sampling. Use Value: Enables <1% current accuracy using 5mΩ sense resistor, minimizing IR drop and thermal impact on PCB layout. |
Use Scenario: Accurate motor current feedback in portable infusion pumps to detect occlusion, stall, or flow rate deviation. IC Role / Device Role / Timing Role: Unidirectional current monitor interfacing with microcontroller ADC at 100Hz update rate. Use Value: 500V/V gain resolves 2mA resolution at 1A full scale; ±40µV max VOS ensures <0.05% baseline error over operating temperature. |
| Automotive Body Control Module (BCM) | Industrial DC-DC Converter Monitoring |
Use Scenario: Load current supervision for LED headlamp drivers and HVAC blower motors in BCMs. IC Role / Device Role / Timing Role: High-voltage tolerant current sensor placed between 12V/24V supply and load switch FET. Use Value: -0.1V to +36V common-mode range accommodates cold-crank transients and reverse-battery protection circuits. |
Use Scenario: Output current monitoring in isolated 48V–12V buck converters for server power supplies. IC Role / Device Role / Timing Role: Precision current feedback element feeding analog control loop or digital PMBus telemetry. Use Value: 0.05% gain error and 21µA quiescent current support tight regulation margins and energy-efficient standby modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision, low-power current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA219BIDR | Integrated 12-bit ADC + I²C interface; 260µA supply current; 200V/V max gain; 26V max VCM. | Requires no external ADC but consumes >12× more supply current; limited to lower-voltage systems. | Select when digital output and bus communication are prioritized over ultra-low power and extended VCM. |
| MAX40086AUT#T | 500V/V gain; 25µA supply current; -0.2V to +36V VCM; 0.1% gain error (max); WLP-6 package. | Nearly identical specs but higher gain error tolerance; newer generation with improved CMRR at high frequencies. | Choose for new designs needing marginally better AC performance and same footprint compatibility. |
Compared with INA219BIDR and MAX40086AUT#T, the MAX44284EAWT+T offers the lowest quiescent current and tightest DC gain accuracy over temperature - making it optimal for always-on, battery-critical applications where analog output suffices.
Availability
MAX44284EAWT+T is available at Aetrix Electronics and suitable for smartphone battery management, medical infusion pumps, automotive body control modules, and industrial DC-DC converter monitoring requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX44284EAWT+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors - serving precision instrumentation, industrial automation, and automotive safety markets since 1965.
The MAX44284 family was developed specifically for ultra-low-power, high-accuracy current sensing in space- and energy-constrained portable and automotive systems - emphasizing DC stability, wide common-mode operation, and robustness across extreme temperatures.
FAQ
What is the maximum input common-mode voltage for MAX44284EAWT+T?
The MAX44284EAWT+T supports an input common-mode voltage range from -0.1V to +36V. This specification is guaranteed across the full -40°C to +125°C operating temperature range and is independent of the VDD supply voltage. The absolute maximum rating for RS+ and RS- pins is -0.3V to +40V, providing design margin for transient conditions such as load dump or cold-crank events in automotive applications.
Does MAX44284EAWT+T support bidirectional current sensing?
The MAX44284EAWT+T is specified as a unidirectional current-sense amplifier. While its -0.1V input common-mode range permits low-side sensing configurations, it does not provide dual-output or internal level-shifting required for true bidirectional measurement. For bidirectional applications like battery charge/discharge monitoring, a separate device such as the MAX44299 or discrete implementation with external reference is required.
What is the typical output voltage swing of MAX44284EAWT+T?
The MAX44284EAWT+T delivers rail-to-rail output voltage swing: minimum VOL is 0.3mV (no load) and maximum VOH is VDD – 25mV (with 100µA source current). At VDD = 3.3V, this yields a usable output range of approximately 0.3mV to 3.275V - sufficient to drive 12-bit SAR ADCs directly without amplification or level-shifting.
Can MAX44284EAWT+T operate from a 1.8V supply?
Yes, MAX44284EAWT+T is fully specified to operate from 1.7V to 5.5V. At VDD = 1.8V, the device maintains all key specifications including 500V/V gain, ±15µV (typ) input offset voltage, and 21µA quiescent current. The output swing adjusts accordingly, with VOH ≈ 1.775V and VOL ≈ 0.3mV - enabling compatibility with 1.8V logic and ADC interfaces.
What package type is used for MAX44284EAWT+T?
MAX44284EAWT+T uses a 6-bump, 0.4mm-pitch Wafer-Level Package (WLP) with dimensions of 1.3mm × 0.9mm. The package code "AWT" explicitly denotes the WLP variant, and the top-mark "+DA" confirms this configuration. It is RoHS-compliant and designed for reflow soldering per JEDEC J-STD-020 standards.
MAX44284EAWT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 6-WFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 400 Hz
- Current - Input Bias:
- 2 nA
- Voltage - Input Offset:
- 15 µV
- Current - Supply:
- 21µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 1.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WLP (0.85x1.25)
MAX44284EAWT+T FAQ
1.How can I place an order for MAX44284EAWT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX44284EAWT+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 MAX44284EAWT+T reliable?
The price and inventory of MAX44284EAWT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX44284EAWT+T is usually 5 days.
3.What payment methods are accepted for MAX44284EAWT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX44284EAWT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX44284EAWT+T?
MAX44284EAWT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX44284EAWT+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 MAX44284EAWT+T?
For technical support, including MAX44284EAWT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX44284EAWT+T requirements.
6.How does Aetrix verify that MAX44284EAWT+T is sourced from the original manufacturer or authorized distributors?
All MAX44284EAWT+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 MAX44284EAWT+T meets industry standards.
7.What is the process for return or replacement of MAX44284EAWT+T?
All MAX44284EAWT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX44284EAWT+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 MAX44284EAWT+T part is unused and in its original packaging.
Return procedure for MAX44284EAWT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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