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Analog Devices Inc./Maxim Integrated MAX40010LAUT+T
- Part No.:
- MAX40010LAUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
MAX40010LAUT+T.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:2,349
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Product details
Overview
MAX40010LAUT+T from Maxim Integrated is a single-channel, high-side precision current-sense amplifier with 2.7V to 76V input common-mode range, 12.5V/V fixed gain, ±12µV max input offset voltage at +25°C, and 0.1% max gain error at +25°C-designed for accurate high-voltage current monitoring in base station power amplifiers and automotive battery management systems.
For engineers reviewing the MAX40010LAUT+T datasheet, MAX40010LAUT+T pinout, MAX40010LAUT+T application, or MAX40010LAUT+T equivalent, key selection criteria include its 80kHz small-signal bandwidth, EMIR-filtered inputs for RF immunity, -40°C to +125°C operating range, and SOT23-6 package compatibility with space-constrained PCB layouts.
Technical Context
The MAX40010LAUT+T implements a high-voltage p-channel FET-based current mirror architecture that enables sensing independent of supply voltage (VDD = 2.7V–5.5V), supporting high-side monitoring even when VCM exceeds VDD. Its internal gain-setting resistors (R1 = 25kΩ, RG1 = 10kΩ, RF = 100kΩ) fix total gain at 12.5V/V per Table 1.
It features dual-stage op-amp topology: A1 forces current through RG1 to match VSENSE across RSENSE; A2 buffers and scales output as VOUT = ILOAD × RSENSE × (R1/RG1) × (1 + RF/R1). Output stage delivers VOH = VDD – 16mV (sourcing 500µA) and VOL = 15mV (sinking 500µA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Common-Mode Range | 2.7V to 76V - enables direct sensing on battery outputs or 48V/60V telecom rails without level-shifting. |
| Fixed Gain | 12.5V/V - optimized for full-scale sense voltage of 200mV, allowing use of low-value shunts (e.g., 1mΩ at 200A) to minimize I²R loss. |
| Input Offset Voltage (max) | ±25µV over -40°C to +125°C - ensures sub-0.1% error at 200mV full-scale, critical for precision energy metering. |
| Gain Error (max) | 0.7% over -40°C to +125°C - supports calibrated current measurement without per-unit trimming in industrial temperature ranges. |
| Small-Signal Bandwidth | 80kHz at G = 50V/V - scaled proportionally to ~20kHz at G = 12.5V/V, sufficient for DC–20kHz load transient detection. |
| Supply Current (max) | 800µA - enables always-on monitoring in low-power systems such as automotive ECU sleep modes. |
| EMI Rejection | Integrated RC filters on RS+/RS− - suppresses RF interference from nearby transceivers or switching converters (e.g., LTE PA stages). |
Pinout & Package
MAX40010LAUT+T uses the 6-pin SOT23 U6SN+1 package (1.6mm × 2.9mm × 1.1mm), specified in Outline No. 21-0058, with RoHS-compliant lead-free finish (+T suffix). Pin 1 is NC; pins 2–6 are assigned as GND, OUT, VDD, RS−, and RS+ respectively.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NC) | No Connect | Unused silicon pad; must remain unconnected to avoid parasitic coupling or latch-up risk. |
| Pin 2 (GND) | Ground Reference | Return path for VDD and internal bias circuits; requires low-inductance connection to system ground plane. |
| Pin 3 (OUT) | Analog Output | Voltage output proportional to sensed current (VOUT = 12.5 × VSENSE); drives ADC inputs or comparator thresholds directly. |
| Pin 4 (VDD) | Supply Input | 2.7V–5.5V analog/digital supply; decoupling capacitor (≥1µF ceramic) required within 2mm of pin. |
| Pin 5 (RS+) | High-Side Sense Input | Connects to power-source side of shunt resistor; withstands up to +80V absolute max relative to GND. |
| Pin 6 (RS−) | Low-Side Sense Input | Connects to load side of shunt; differential input rejects common-mode noise up to 140dB CMRR. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low offset drift | 130nV/°C - maintains accuracy across automotive under-hood temperature swings without recalibration. |
| RF-immune inputs | Integrated EMIR filters - eliminate false triggers in cellular base stations exposed to 900MHz–2.6GHz RF fields. |
| High CMRR | 140dB at DC - rejects noise from shared ground paths in server backplanes with multiple high-current rails. |
| Fast transient recovery | 2µs settling (0.1%) after 2VP-P step - captures rapid load changes in CPU VRM current telemetry. |
| Thermal robustness | θJA = 74.6°C/W (SOT23) - sustains continuous operation at +125°C ambient with <100mW dissipation. |
Applications
| Base Station Power Amplifier Monitoring | Automotive 12V/48V Battery Management |
|---|---|
Use Scenario: Real-time current monitoring of GaN/LDMOS power amplifiers biased at 36V–76V in 5G macro cells. IC Role / Device Role / Timing Role: High-side current-sense amplifier providing isolated analog feedback to FPGA-based PA protection logic. Use Value: Enables fast overcurrent shutdown (<10µs) while maintaining ±0.5% measurement accuracy across -40°C to +85°C outdoor cabinet environments. |
Use Scenario: Bidirectional current sensing in 12V starter-battery and 48V mild-hybrid systems during engine cranking and regenerative braking. IC Role / Device Role / Timing Role: Precision high-side monitor interfacing with ASIL-B microcontroller ADC channels. Use Value: Supports ISO 26262-compliant state-of-charge estimation using 1mΩ shunts, minimizing thermal drift via <25µV offset spec. |
| Server Backplane Power Rail Telemetry | Solar Inverter DC-Link Monitoring |
Use Scenario: Per-rail current measurement on 12V/48V server backplanes with >200A peak loads and dense component layout. IC Role / Device Role / Timing Role: High-CMRR current sensor feeding PMBus-compatible digital power controllers. Use Value: Rejects switching noise from adjacent VRMs (125dB CMRR) and enables predictive fan control via accurate thermal modeling. |
Use Scenario: DC-link current monitoring in string inverters where PV array voltages reach 1000V and DC bus operates at 600–800V. IC Role / Device Role / Timing Role: Isolated high-side amplifier cascaded with isolated ADC for galvanically separated measurement. Use Value: Allows use of low-cost, non-isolated downstream signal chain by shifting sensing to the high-voltage side before isolation barrier. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | 5V/V fixed gain, 2.7V–80V VCM, ±10µV offset (typ), SOIC-8 package | Lower gain requires larger shunt voltage drop; wider SOIC footprint limits high-density layouts | Select when higher offset accuracy at room temperature is prioritized over wide-temp stability or board area. |
| LT6106IMS8#TRPBF | 100V/V fixed gain, 2.7V–60V VCM, ±150µV offset (max), MSOP-8 package | Higher gain suits µA–mA sensing but lacks EMIR filtering; limited to ≤60V VCM | Select for ultra-low-current applications (e.g., leakage detection) where RF immunity is not required. |
Compared with MAX40010LAUT+T, INA240A1QDRQ1 offers tighter offset at 25°C but wider temp drift (±0.5µV/°C vs. 0.13µV/°C), while LT6106IMS8#TRPBF trades RF resilience and 76V capability for higher gain-making MAX40010LAUT+T optimal for 5G infrastructure and automotive high-voltage monitoring where both voltage headroom and EMI hardness are mandatory.
Availability
MAX40010LAUT+T is available at Aetrix Electronics and suitable for base station power amplifiers, automotive battery management systems, and server backplane telemetry requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for MAX40010LAUT+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, communications, and automotive applications.
The MAX40010 family targets high-voltage current sensing where accuracy, RF immunity, and wide temperature operation are essential-specifically addressing gaps in telecom infrastructure, EV subsystems, and data center power integrity.
FAQ
What is the maximum input common-mode voltage supported by the MAX40010LAUT+T?
The MAX40010LAUT+T supports an input common-mode voltage range of 2.7V to 76V, verified per Absolute Maximum Ratings (RS+/RS− to GND: −0.3V to +80V). This allows direct sensing on 48V telecom rails and 60V automotive systems without external level-shifting circuitry. The device maintains full functionality across this range with guaranteed CMRR ≥125dB.
Does the MAX40010LAUT+T require external calibration to achieve its stated accuracy?
No, the MAX40010LAUT+T achieves its ±25µV input offset voltage and 0.7% gain error over −40°C to +125°C without external calibration. These specifications are production-tested and guaranteed by design per the datasheet's Electrical Characteristics table. System-level calibration may further improve accuracy but is not required for baseline performance.
Can the MAX40010LAUT+T be used in bidirectional current sensing applications?
The MAX40010LAUT+T is a unidirectional high-side current-sense amplifier: its output voltage is referenced to GND and scales only with positive differential input (RS+ > RS−). For bidirectional sensing, a second device configured with reversed shunt orientation or a dedicated bidirectional amplifier like the MAX40020 is required.
What is the recommended output filter configuration for the MAX40010LAUT+T when driving an ADC?
For ADC interfacing, Maxim recommends a 500Ω series resistor and 14.7nF capacitor at the MAX40010LAUT+T output (Figure 3). This RC filter reduces broadband noise and transient overshoot while acting as a charge reservoir during ADC sample phases. Stability is confirmed for capacitive loads ≤20nF with 240Ω isolation resistance per Typical Operating Characteristics.
How does the EMIR filter in the MAX40010LAUT+T improve system reliability in communication equipment?
The MAX40010LAUT+T integrates passive RC EMI rejection filters on RS+/RS− inputs, suppressing RF interference from adjacent transceivers (e.g., 900MHz–2.6GHz LTE bands). This prevents erroneous current readings and false fault triggers in base station PA monitoring-verified by AC CMRR ≥48dB at 200kHz and measured EMI rejection plots in the datasheet.
MAX40010LAUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 80 kHz
- Current - Input Bias:
- 65 µA
- Voltage - Input Offset:
- 12 µV
- Current - Supply:
- 350µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX40010LAUT+T FAQ
1.How can I place an order for MAX40010LAUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX40010LAUT+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 MAX40010LAUT+T reliable?
The price and inventory of MAX40010LAUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX40010LAUT+T is usually 5 days.
3.What payment methods are accepted for MAX40010LAUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX40010LAUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX40010LAUT+T?
MAX40010LAUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX40010LAUT+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 MAX40010LAUT+T?
For technical support, including MAX40010LAUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX40010LAUT+T requirements.
6.How does Aetrix verify that MAX40010LAUT+T is sourced from the original manufacturer or authorized distributors?
All MAX40010LAUT+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 MAX40010LAUT+T meets industry standards.
7.What is the process for return or replacement of MAX40010LAUT+T?
All MAX40010LAUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX40010LAUT+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 MAX40010LAUT+T part is unused and in its original packaging.
Return procedure for MAX40010LAUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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