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Analog Devices Inc./Maxim Integrated MAX9611AUB+
- Part No.:
- MAX9611AUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX9611AUB+.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,719
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Product details
Overview
The MAX9611AUB+ from Maxim Integrated is a high-side current-sense amplifier with integrated 12-bit ADC, noninverting input-to-output configuration, 0V to +60V input common-mode range, programmable full-scale sense voltage (55mV/110mV/440mV), and I²C interface-designed for precision current monitoring in automotive power supplies and server backplanes.
For engineers reviewing the MAX9611AUB+ datasheet, MAX9611AUB+ pinout, MAX9611AUB+ application, or MAX9611AUB+ equivalent, this device delivers calibrated current sensing, on-chip temperature measurement, and configurable op-amp/comparator functionality within a compact 10-pin µMAX package for high-voltage industrial and automotive systems.
Technical Context
The MAX9611AUB+ integrates a precision current-sense amplifier (2.5× fixed gain) feeding an internal multiplexer that routes VSENSE, VRSCM, VOUT, VSET, or die temperature to a dual-slope 12-bit ADC with 2ms conversion time and 500sps effective sampling rate. Its analog path supports noninverting signal flow from RS+/RS− to OUT with Class-A output stage.
I²C communication operates at up to 400kHz with 16 selectable slave addresses via A0/A1 pins, 1.8V/3.3V logic compatibility, and register-level control of gain, mode (op-amp vs. comparator), watchdog timing, and ADC channel selection-enabling closed-loop current limiting and fast fault detection without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Common-Mode Range | 0V to +60V - enables direct high-side sensing across battery, bus, or load terminals without level-shifting. |
| Current-Sense ADC Resolution | 13.44µV LSB (gain = 8×) - supports sub-mA current resolution with 55mV full-scale sense voltage. |
| ADC Conversion Time | 2ms - ensures deterministic timing for synchronized system-level measurements and control loops. |
| I²C Interface Speed | Up to 400kHz - compatible with standard SMBus and modern microcontrollers for real-time telemetry. |
| Operating Temperature Range | –40°C to +125°C - fully specified for under-hood automotive and industrial embedded environments. |
| Supply Voltage Range | 2.7V to 5.5V - supports single-supply operation from 3.3V or 5V rails with 1.6mA typical quiescent current. |
| Package | 10-pin µMAX (3mm × 5mm) - surface-mount footprint optimized for space-constrained PCB layouts. |
Pinout & Package
MAX9611AUB+ is housed in a 3mm × 5mm, 10-pin µMAX® package with exposed pad for thermal performance. Pin 1 is OUT; pin 5 is GND; pin 10 is VCC; pins 6 and 7 are I²C SCL/SDA; pins 8 and 9 are address inputs A1/A0; pins 2 and 3 are high-side sense inputs RS+ and RS−; pin 4 is SET reference input.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier/Comparator Output | Open-drain 60V nFET output requiring external pullup; drives FET gates or latched fault signals. |
| 2 (RS+) | Positive Current-Sense Input | Connects to power side of sense resistor; withstands –0.3V to +65V common-mode and ±65V differential. |
| 3 (RS−) | Negative Current-Sense Input | Connects to load side of sense resistor; low bias current (≤5µA) preserves accuracy with RC filters. |
| 4 (SET) | Reference Voltage Input | Accepts 0V–1.10V setpoint; <50nA bias current enables high-impedance DAC/resistor-divider interfaces. |
| 5 (GND) | Analog/Digital Ground | Single ground reference for all analog and digital circuitry; requires low-inductance connection to PCB plane. |
| 6 (SCL) | I²C Clock Input | Active-low, 1.8V/3.3V-compatible clock line; supports 400kHz operation with 1.3µs minimum low period. |
| 7 (SDA) | I²C Data I/O | Bidirectional open-drain data line; requires external pullup; supports read/write burst transfers. |
| 8 (A1), 9 (A0) | I²C Address Inputs | Set one of 16 slave addresses (0xE0–0xFF); logic thresholds at ¼, ½, and ¾ of VCC for robust level detection. |
| 10 (VCC) | Supply Voltage Input | 2.7V–5.5V input; bypassed with 0.1µF + 4.7µF capacitors to minimize noise coupling into analog paths. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Full-Scale Sense Voltage | 55mV / 110mV / 440mV - selects optimal gain (8×/4×/1×) to maximize ADC dynamic range for diverse sense resistor values. |
| Integrated Dual-Slope 12-Bit ADC | Measures VSENSE, VRSCM, VOUT, VSET, and die temperature with 0.48°C temperature resolution and <1LSB INL/DNL. |
| Selectable Op-Amp or Comparator Mode | Configurable via Control Register 1 bit 7 - op-amp enables closed-loop current source; comparator enables fast fault response with latch/retry. |
| Watchdog/Latch/Retry Digital Logic | Configurable watchdog delay (100µs/1ms) and retry delay (10ms/50ms) - suppresses transient faults while retaining fast fault capture. |
| High-Voltage Robustness | RS+/RS− rated for –0.3V/+65V common-mode and ±65V differential - survives load dump, reverse battery, and inductive kick events. |
Applications
| Hybrid Automotive Power Supplies | Server Backplanes |
|---|---|
Use Scenario: Real-time battery charge/discharge current monitoring in 12V/48V hybrid architectures with regenerative braking feedback. IC Role / Device Role / Timing Role: High-side current-sense amplifier with integrated ADC provides isolated, accurate current telemetry to MCU over I²C. Use Value: Enables precise state-of-charge estimation and overcurrent protection without shunt isolation or external ADC. |
Use Scenario: Per-slot current monitoring on telecom server backplanes to detect hot-plug insertion faults and overcurrent conditions. IC Role / Device Role / Timing Role: Noninverting current sensor measures load current upstream of DC-DC converters with 60V common-mode tolerance. Use Value: Delivers 13.44µV LSB resolution at 55mV full-scale to detect <100mA faults before thermal damage occurs. |
| Base-Station Feeder Cable Bias-T | Battery-Operated Equipment |
Use Scenario: Monitoring DC bias current injected into RF feeder cables in macro base stations to ensure PA stability and prevent cable heating. IC Role / Device Role / Timing Role: High-side sense amplifier with 0.5% max gain error and 500µV max offset ensures stable bias control across temperature. Use Value: Eliminates need for external precision op-amp and ADC, reducing BOM count and layout area in RF subsystems. |
Use Scenario: Low-power current profiling in portable medical devices or handheld test equipment to extend battery life and log usage patterns. IC Role / Device Role / Timing Role: I²C-configurable current sensor with 5µA shutdown current minimizes system standby power consumption. Use Value: Enables firmware-controlled current measurement and thermal derating without waking host processor. |
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 |
|---|---|---|---|
| MAX9612AUB+ | Inverting input-to-output configuration; identical pinout, specs, and feature set except polarity reversal. | Required when system feedback loop demands inverted output polarity relative to sense voltage. | Select MAX9612AUB+ only if inverting transfer function is needed; otherwise MAX9611AUB+ is preferred for noninverting use cases. |
| INA226AIDGST | 36V max common-mode, 16-bit delta-sigma ADC, no integrated op-amp/comparator, 2-wire I²C only. | Suitable for lower-voltage (<36V) precision power monitoring but lacks active output stage for fault handling. | Choose INA226AIDGST when higher ADC resolution is critical and external comparator/op-amp is acceptable; not drop-in for 60V or active output needs. |
Compared with MAX9612AUB+, the MAX9611AUB+ provides noninverting signal flow essential for direct closed-loop current regulation; compared with INA226AIDGST, it offers 60V common-mode tolerance and integrated output driver-critical for automotive and high-voltage industrial fault response.
Availability
MAX9611AUB+ is available at Aetrix Electronics and suitable for hybrid automotive power supplies, server backplanes, and base-station feeder cable bias-T applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX9611AUB+ 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 MAX9611AUB+ belongs to Maxim's high-voltage current-sense amplifier product line, engineered specifically for accurate, robust, and integrated current monitoring in safety-critical 12V–60V systems where space, reliability, and diagnostic capability are paramount.
FAQ
What is the maximum input common-mode voltage supported by the MAX9611AUB+?
The MAX9611AUB+ supports an input common-mode voltage range of 0V to +60V on its RS+ and RS− pins. This allows direct high-side current sensing across automotive batteries, server power rails, and telecom power feeds without external level-shifting circuitry. Absolute maximum ratings extend to –0.3V/+65V, ensuring survivability during transients like load dump.
How does the MAX9611AUB+ handle fault detection and response?
The MAX9611AUB+ implements configurable watchdog/latch/retry logic in comparator mode. When enabled via Control Register 1, it waits a programmable watchdog delay (100µs or 1ms) before asserting OUT, then latches the fault and retries after a configurable delay (10ms or 50ms). This prevents false triggering from brief transients while maintaining fast response to sustained overcurrent events.
Can the MAX9611AUB+ measure temperature, and what is its accuracy?
Yes, the MAX9611AUB+ integrates a die temperature sensor readable via its 12-bit ADC. It provides 0.48°C resolution and ±0.48°C accuracy across the full –40°C to +125°C operating range. Temperature data is available in a 9-bit two's complement format and can be used for thermal derating, calibration compensation, or system health monitoring without external sensors.
What are the gain options for the current-sense ADC path in the MAX9611AUB+?
The MAX9611AUB+ offers three programmable gain settings for its current-sense ADC path: 1× (440mV full-scale), 4× (110mV full-scale), and 8× (55mV full-scale). These gains are selected via internal registers and determine the LSB step size (107.5µV, 26.88µV, or 13.44µV respectively), enabling optimal dynamic range for different sense resistor values and current ranges.
Is the MAX9611AUB+ pin-compatible with any other Maxim current-sense amplifiers?
The MAX9611AUB+ shares identical pinout and package (10-pin µMAX) with the MAX9612AUB+, differing only in input-to-output polarity (noninverting vs. inverting). No other Maxim current-sense amplifier uses this exact pin assignment; alternatives like MAX4008 or MAX4372 have different pin counts, functions, and voltage ratings, requiring PCB redesign.
MAX9611AUB+ 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:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- -
- Gain Bandwidth Product:
- 2.5 MHz
- -3db Bandwidth:
- 4 MHz
- Current - Input Bias:
- 1 µA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 1.6mA
- Current - Output / Channel:
- 15 mA
- 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:
- 10-uMAX/uSOP
MAX9611AUB+ FAQ
1.How can I place an order for MAX9611AUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9611AUB+ 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 MAX9611AUB+ reliable?
The price and inventory of MAX9611AUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9611AUB+ is usually 5 days.
3.What payment methods are accepted for MAX9611AUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9611AUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9611AUB+?
MAX9611AUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9611AUB+ 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 MAX9611AUB+?
For technical support, including MAX9611AUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9611AUB+ requirements.
6.How does Aetrix verify that MAX9611AUB+ is sourced from the original manufacturer or authorized distributors?
All MAX9611AUB+ 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 MAX9611AUB+ meets industry standards.
7.What is the process for return or replacement of MAX9611AUB+?
All MAX9611AUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9611AUB+, 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 MAX9611AUB+ part is unused and in its original packaging.
Return procedure for MAX9611AUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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