MAX9611AUB+ - 12-Bit High-Side Current-Sense Amplifier | Analog Devices
MPN: MAX9611AUB+ ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
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| 500 | $0 | $0.00 |
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MAX9611AUB+ Overview
A high-side current-sense amplifier is an analog measurement IC that develops a voltage proportional to the current passing through a sense resistor placed in a supply or power rail. It belongs to the current-sense amplifier hierarchy within signal-chain and power-management semiconductors. By measuring voltage across a small shunt, the device enables current monitoring, protection, diagnostics, and feedback without interrupting the high-side load path.
Key verified features include a 0V to 60V input common-mode range, programmable full-scale voltages of 440mV, 110mV, and 55mV, a 12-bit ADC, and 2.5MHz bandwidth identified in distributor product data. The MAX9611AUB+ uses the noninverting configuration identified by Analog Devices. Its integrated ADC supports digital current measurement, while the gain block can support comparator-style threshold functions according to the device documentation.
The combination of a wide common-mode range and selectable full-scale voltage allows the sense resistor to be selected for the expected current range. This is useful when current measurements must operate across automotive, industrial, or power-supply rails while preserving measurement resolution. The 60V capability also exceeds the nominal range of many low-voltage signal-chain amplifiers, allowing the part to remain on a higher-voltage high-side rail.
Typical applications include motor and actuator current monitoring, battery-pack current sensing, industrial power-system protection, DC-DC converter feedback, and automotive load diagnostics. The noninverting MAX9611 is appropriate when the measured output polarity and system architecture match the target board.
Designers should verify the sense-resistor value, full-scale setting, ADC reference, Kelvin routing, filtering, and thermal dissipation before production. The manufacturer’s application guidance and datasheet should control the final values because the provided source data does not include all timing, accuracy, and electrical limits.
This page consolidates verified manufacturer and distributor information, explains practical current-sense design choices, and distinguishes documented alternatives from unverified package substitutions. Unspecified values are explicitly marked for engineering follow-up rather than estimated.
Drop-in alternatives for MAX9611AUB+ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX9612AUB+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX9612AUB+T
✅ Drop-In📋 Reference alternative (not in catalog)
MAX9611AUB+ Maximum Ratings & Electrical Characteristics
| Product Type | High-side current-sense amplifier with integrated ADC |
| Integrated ADC Resolution | 12 bit |
| Input Common-Mode Voltage Range | 0 V to 60 V |
| Programmable Full-Scale Voltage | 440 mV, 110 mV, or 55 mV |
| Gain Block Configuration | Configurable as op amp or comparator |
| MAX9611 Configuration | Noninverting |
| Bandwidth | 2.5 MHz |
| Number of Amplifiers | 1 circuit |
| Package Type | 10-pin uMAX/uSOP |
| Mounting Type | Surface mount |
| Sensor Method | High-side shunt current sensing |
| Automotive Application | Supported for industrial and automotive designs |
MAX9611AUB+ 10-pin umax/usop Pin Configuration Guide
Pin configuration for MAX9611AUB+ (10-pin umax/usop package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for MAX9611AUB+.
Refer to the datasheet for full pin configuration.
Typical Applications
MAX9611AUB+ is suitable for 6 applications: Automotive High-Side Load Monitoring, Battery-Pack Current Sensing, Motor and Actuator Current Protection, Industrial DC Power-Supply Feedback, Load-Current Diagnostics, Power-Path Protection and Telemetry.
Automotive High-Side Load Monitoring
MAX9611AUB+ fits high-side load monitoring where the measured rail can reach the verified 0V to 60V common-mode range and the system benefits from local current-to-digital conversion. Place the amplifier across a sense resistor in the positive supply path, then use the integrated 12-bit ADC to report current to a controller. The 440mV, 110mV, and 55mV full-scale options allow the engineer to match the shunt to the expected load, while the 2.5MHz bandwidth supports faster current transients. Verify automotive qualification, temperature limits, and fault behavior in the final design.
Recommended
Battery-Pack Current Sensing
The MAX9611AUB+ is suitable for battery systems that need current measurement without placing the shunt at ground potential. Its verified 0V to 60V input common-mode range covers many automotive and industrial battery rails, and the 12-bit ADC provides a digital measurement path for charge, discharge, and fault monitoring. Select the full-scale threshold and shunt together so normal current remains below the programmed limit while resolution remains useful. Check the maximum bus voltage, transient protection, shunt power, and thermal performance against the actual battery chemistry and load profile.
Recommended
Motor and Actuator Current Protection
Use MAX9611AUB+ to monitor current in a motor or actuator supply when fast fault detection is more important than a low-side measurement. The wide verified common-mode range allows sensing on a positive rail up to 60V, while the selectable full-scale voltage supports several shunt choices. The configurable gain block can be used as an op amp or comparator function according to the device documentation, enabling measurement or threshold-based protection. Design the sense path with Kelvin connections, filtering, surge protection, and a response time appropriate for the motor’s inrush behavior.
Recommended
Industrial DC Power-Supply Feedback
MAX9611AUB+ can provide a local current measurement for industrial power-conversion and monitoring boards. Place the sense resistor in the high-side output path, configure the device for the intended current range, and use the integrated 12-bit ADC to avoid a separate digitizer in simple telemetry loops. The 2.5MHz bandwidth can capture load changes, but the complete system must still account for switching-node transients and common-mode excursions. Confirm the shunt’s pulse rating and the amplifier’s supply and operating-temperature requirements from the manufacturer datasheet.
Recommended
Load-Current Diagnostics
The MAX9611AUB+ supports load-current diagnostics by converting the voltage across a high-side sense resistor into a digital measurement. This is useful for detecting overload, undercurrent, unexpected standby draw, and load imbalance in equipment with multiple powered branches. The 12-bit ADC provides more measurement information than a simple threshold-only detector, while the programmable 55mV, 110mV, and 440mV ranges provide flexibility in selecting the full-scale condition. A diagnostic algorithm should account for offset, calibration, shunt tolerance, and transient filtering.
Recommended
Power-Path Protection and Telemetry
MAX9611AUB+ can combine power-path protection and telemetry in systems where the supply rail is above low-voltage logic levels. Its verified 0V to 60V common-mode capability permits high-side sensing, and the integrated 12-bit ADC supports direct digital current reporting to a controller. Use the amplifier’s programmable full-scale setting to establish the measurement ceiling and size the shunt for both full-load and fault-current conditions. The design must include input filtering, protection against inductive transients, and a ground strategy that keeps the sense amplifier within its specified supply limits.
Recommended
Recommended Products Summary
Engineering reference data for MAX9611AUB+ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX9612AUB+ | MAX9612AUB+T |
|---|---|---|---|
| Package | 10-pin uMAX/uSOP | 10-pin uMAX/uSOP | 10-pin uMAX/uSOP |
| Brand | Analog Devices | Maxim Integrated | Maxim Integrated |
| Input Common-Mode Voltage Range | 0V to 60V | 0V to 60V | 0V to 60V |
| ADC Resolution | 12 bit | 12 bit | 12 bit |
| Programmable Full-Scale Voltage | 440mV, 110mV, or 55mV | 440mV, 110mV, or 55mV | 440mV, 110mV, or 55mV |
| Gain Block | Configurable as op amp or comparator | Configurable as op amp or comparator | Configurable as op amp or comparator |
| Configuration | Noninverting | Inverting | Inverting |
| Application Positioning | Industrial and automotive current sensing | Industrial and automotive current sensing | Industrial and automotive current sensing |
Key Differentiators
- Integrated 12-bit ADC (vs MAX9612AUB+)
- Wide high-side common-mode range (vs MAX9612AUB+)
- Configurable gain block (vs MAX9612AUB+)
- Noninverting configuration (vs MAX9612AUB+)
Design Notes
Do not treat the 0V to 60V common-mode rating as permission to exceed the device’s separate supply-voltage rating. The verified source data does not provide the MAX9611AUB+ supply range, so the engineer must obtain that limit from the manufacturer datasheet before powering the part. Also verify the distinction between the common-mode range and the maximum voltage allowed on every pin.
Route the two sense connections as a differential, tightly coupled pair and connect them directly across the sense resistor using Kelvin traces. Keep the high-current path separate from the sense-signal path so voltage drops in copper and connectors do not become part of the measurement. The verified data does not provide a recommended PCB layout, so follow the manufacturer’s layout guidance when available.
Select the sense resistor from the desired full-scale setting, maximum expected current, allowable dissipation, and ADC resolution. Estimated power in the resistor is P = I²R using the maximum current and selected resistance; recalculate transient and fault cases separately. The supplied data confirms 440mV, 110mV, and 55mV full-scale options but does not provide the manufacturer’s recommended shunt values.
Place filtering close to the measurement path and validate it against the 2.5MHz bandwidth identified in the distributor product data. Excess filtering can slow fault detection, while insufficient filtering can expose the measurement to switching and inductive transients. Simulate the complete sense path with the actual shunt, source impedance, ADC sampling method, and protection network before releasing the design.
Compliance Information
The supplied verified web data identifies industrial and automotive application positioning but does not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status.
