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Analog Devices Inc./Maxim Integrated MAX9611AUB+T
- Part No.:
- MAX9611AUB+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX9611AUB+T.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:15,237
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Product details
Overview
MAX9611AUB+T 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 inrush-current limiting and fault monitoring in automotive power supplies.
For engineers reviewing the MAX9611AUB+T datasheet, MAX9611AUB+T pinout, MAX9611AUB+T application, or MAX9611AUB+T equivalent, this device delivers verified 12-bit current/voltage/temperature measurement, ±65V differential input tolerance, 500sps conversion rate, and configurable op-amp/comparator output for closed-loop control or fast fault response.
Technical Context
The MAX9611AUB+T integrates a precision current-sense amplifier (2.5× fixed gain) feeding into a selectable op-amp or comparator stage, with internal negative charge pump eliminating crossover distortion. Its dual-slope 12-bit ADC digitizes VSENSE, VRSCM, VOUT, VSET, and die temperature with 0.48°C resolution and 2ms conversion time.
I²C communication supports 16 slave addresses via A0/A1 pins, 400kHz max clock, and 1.8V/3.3V logic compatibility. The noninverting architecture ensures direct proportional output scaling relative to sensed current, while watchdog-latch-retry modes (configurable via Control Register 1) enable robust transient rejection in safety-critical systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Common-Mode Range | 0V to +60V - enables direct sensing on battery rails up to 60V without level-shifting circuitry. |
| Current-Sense ADC Resolution | 13.44µV LSB (gain = 8×) - supports sub-mA current measurement accuracy with 55mV full-scale range. |
| ADC Conversion Rate | 500sps - provides real-time current monitoring suitable for dynamic load profiling and thermal management. |
| Gain Error (CSA Path) | ≤2.5% (–40°C to +125°C, gain = 8×) - ensures stable calibration across automotive temperature extremes. |
| I²C Interface | 400kHz SMBus-compatible - allows seamless integration with modern microcontrollers using standard firmware drivers. |
| Supply Voltage Range | 2.7V to 5.5V - compatible with 3.3V and 5V system rails, including low-power embedded controllers. |
| Digital Temperature Accuracy | ±0.48°C over –40°C to +125°C - enables reliable on-die thermal compensation without external sensors. |
Pinout & Package
Package: 3mm × 5mm, 10-pin µMAX® (lead-free/RoHS-compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Internal amplifier/comparator output | Open-drain 60V nFET output requiring external pullup; drives FET gates or logic-level fault signals. |
| 2 - RS+ | Positive current-sensing input | Connects to high-side of sense resistor; withstands –0.3V to +65V common-mode and ±65V differential. |
| 3 - RS− | Negative current-sensing input | Connects to load side of sense resistor; enables bidirectional current measurement with low bias current (≤5µA). |
| 4 - SET | Reference voltage input | Accepts 0V–1.10V setpoint for op-amp/comparator; <50nA bias current enables high-impedance DAC/resistor-divider interfaces. |
| 5 - GND | Analog/digital ground reference | Single ground pin shared by analog and digital sections; requires low-inductance PCB layout for ADC accuracy. |
| 6 - SCL | I²C clock input | Compatible with 1.8V/3.3V logic; supports standard-mode (100kHz) and fast-mode (400kHz) timing. |
| 7 - SDA | I²C data I/O | Open-drain bidirectional line; requires external pullup; supports multi-master arbitration and ACK/NACK handshaking. |
| 8 - A1 | Address input bit 1 | Configures one of 16 I²C slave addresses (0xE0–0xFF); threshold at 1/3×, 2/3×, or VCC. |
| 9 - A0 | Address input bit 0 | Paired with A1 to select unique I²C address; eliminates bus conflicts in multi-device systems. |
| 10 - VCC | Supply voltage input | 2.7V–5.5V operation; requires parallel 0.1µF ceramic + 4.7µF bulk capacitor for ADC noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable CSA gain (1×/4×/8×) | Enables optimal SNR across wide current ranges: 55mV FS for high-precision low-current sensing, 440mV FS for high-current applications. |
| Integrated dual-slope 12-bit ADC | Delivers 0.5% max gain error and 500µV max offset on current path-eliminates need for external precision ADC and signal conditioning. |
| Watchdog-latch-retry digital control | Configurable 100µs/1ms watchdog delay and 10ms/50ms retry delay prevents false triggering during load transients in automotive hot-swap circuits. |
| Noninverting input-to-output topology | Ensures monotonic output response to increasing load current-critical for stable closed-loop current source design. |
| 60V open-drain output stage | Directly drives high-side p-channel FETs or relay drivers without level-shifting; supports 15mA sink capability at 4V. |
Applications
| Hybrid Automotive Power Supplies | Server Backplanes |
|---|---|
Use Scenario: Monitoring battery pack current during regenerative braking and DC-DC converter startup in 48V mild-hybrid systems. IC Role / Device Role / Timing Role: High-side current-sense amplifier with integrated ADC provides real-time current feedback to MCU for inrush limiting and fault detection. Use Value: 0V–60V common-mode range accommodates full battery voltage swing; 125°C rating ensures reliability under hood conditions. |
Use Scenario: Detecting overcurrent events on redundant 12V/48V server backplane power rails before fuse blow. IC Role / Device Role / Timing Role: Current-sense amplifier + comparator monitors rail integrity; latched fault output triggers immediate power disconnect. Use Value: 1.5µs propagation delay and internal hysteresis enable sub-millisecond fault response-prevents cascading failures. |
| Base-Station Feeder Cable Bias-T | Battery-Operated Equipment |
Use Scenario: Measuring RF power amplifier supply current while injecting DC bias onto coaxial feeder cables. IC Role / Device Role / Timing Role: High-common-mode amplifier isolates sensitive RF path from high-voltage DC bias; ADC reads current for PA efficiency optimization. Use Value: ±65V differential input rating protects against cable surge events; 5µA shutdown current extends standby battery life. |
Use Scenario: Managing charge/discharge current in portable medical devices with Li-ion battery packs. IC Role / Device Role / Timing Role: Dual-function device acts as current monitor (ADC mode) and overcurrent protector (comparator mode) in single footprint. Use Value: Integrated temperature sensor enables battery thermal derating; 2.7V minimum supply supports operation down to end-of-discharge voltage. |
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+T | Inverting input-to-output configuration; identical pinout, specs, and feature set except polarity reversal. | Suitable where inverted control loop response is required (e.g., active-low enable logic or complementary FET drive). | Select MAX9612AUB+T only when system-level signal polarity demands inversion-no change to PCB layout or firmware register map. |
| INA226AIDGST | 36V max common-mode, no integrated op-amp/comparator, 16-bit ADC, 1024SPS, SPI-only interface. | Better resolution for low-current precision but lacks real-time analog output and high-voltage fault response capability. | Choose INA226AIDGST for high-resolution data logging; choose MAX9611AUB+T when analog output, 60V tolerance, or comparator-based fast protection is required. |
Compared with MAX9612AUB+T, the MAX9611AUB+T provides noninverting behavior essential for direct current-source control; compared with INA226AIDGST, it trades resolution for integrated analog functionality, higher voltage rating, and faster fault reaction-making it superior for automotive and industrial power protection.
Availability
MAX9611AUB+T is available at Aetrix Electronics and suitable for hybrid automotive power supplies, server backplanes, and base-station feeder cable bias-T systems requiring stable component supply, long-term lifecycle support, and AEC-Q100-aligned performance.
Supply support for MAX9611AUB+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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX9611AUB+T belongs to Maxim's high-side current-sense amplifier product line, engineered specifically for accurate, high-voltage current monitoring with integrated diagnostics and protection logic in space-constrained power systems.
FAQ
What is the maximum input common-mode voltage supported by the MAX9611AUB+T?
The MAX9611AUB+T supports an input common-mode voltage range of 0V to +60V. This specification is guaranteed across the full operating temperature range (–40°C to +125°C) and allows direct connection to high-voltage battery rails without external level-shifting components. Absolute maximum ratings extend to +65V on RS+ and RS– pins, providing margin against transient overvoltage events.
Does the MAX9611AUB+T include an integrated op-amp or comparator-and can both be used simultaneously?
The MAX9611AUB+T integrates a single selectable analog block that functions either as an op-amp or comparator-not both simultaneously. Selection is controlled via bit 7 of Control Register 1 (0x0A). In op-amp mode, it enables closed-loop current source design; in comparator mode, it supports fast fault detection with configurable watchdog-latch-retry behavior. The output appears on the OUT pin in either configuration.
How does the MAX9611AUB+T measure die temperature, and what is its accuracy?
The MAX9611AUB+T measures internal die temperature using an on-chip sensor digitized by the same 12-bit ADC. It achieves ±0.48°C accuracy across the full –40°C to +125°C operating range, with 0.48°C LSB resolution. Temperature data is stored in registers 0x08 (MSBs) and 0x09 (LSBs), and is provided in 9-bit two's complement format-enabling real-time thermal monitoring and compensation without external sensors.
What are the full-scale sense voltage options for the MAX9611AUB+T's current-sense ADC path?
The MAX9611AUB+T's current-sense ADC path offers three programmable full-scale sense voltage options: 55mV (8× gain), 110mV (4× gain), and 440mV (1× gain). These correspond to LSB step sizes of 13.44µV, 26.88µV, and 107.50µV respectively. Gain selection is configured via MUX bits (MUX2:MUX0) in Control Register 1 (0x0A), enabling optimization for resolution vs. dynamic range based on sense resistor value and expected current range.
Is the MAX9611AUB+T pin-compatible with any other Maxim current-sense amplifiers?
The MAX9611AUB+T shares identical 10-pin µMAX® package dimensions and pinout with the MAX9612AUB+T, differing only in functional polarity (noninverting vs. inverting). No other Maxim current-sense amplifier-including MAX4005–MAX4008 or MAX4372 series-is pin-compatible. Substitution requires verification of signal polarity, register mapping, and feature alignment; MAX9612AUB+T is the only direct mechanical and electrical replacement.
MAX9611AUB+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX9611AUB+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9611AUB+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 MAX9611AUB+T reliable?
The price and inventory of MAX9611AUB+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9611AUB+T is usually 5 days.
3.What payment methods are accepted for MAX9611AUB+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9611AUB+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9611AUB+T?
MAX9611AUB+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9611AUB+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 MAX9611AUB+T?
For technical support, including MAX9611AUB+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9611AUB+T requirements.
6.How does Aetrix verify that MAX9611AUB+T is sourced from the original manufacturer or authorized distributors?
All MAX9611AUB+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 MAX9611AUB+T meets industry standards.
7.What is the process for return or replacement of MAX9611AUB+T?
All MAX9611AUB+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9611AUB+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 MAX9611AUB+T part is unused and in its original packaging.
Return procedure for MAX9611AUB+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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