MAX40056TAUA+ Analog Devices Integrated Circuit (Small Outline Packages) In Stock
The MAX40056TAUA+ is a bidirectional current sense amplifier with PWM-rejection from Analog Devices featuring 140 dB common-mode rejection ratio and 300 µV max input offset voltage. It uses a chopper-stabilized architecture in a compact 8-pin MINI-SO package for precise current monitoring in noisy switching environments. Available from stock with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MAX40056TAUA+ Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.7584(MOQ 100)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 140 dB nominal common-mode rejection ratio (CMRR) with chopper-stabilized architecture eliminates DC and low-frequency errors in high-side current sensing
- PWM rejection capability filters switching noise from motor drives and DC-DC converters, enabling accurate current measurement without additional filtering
- Bidirectional current sensing supports both positive and negative current flows in a single device, ideal for battery management and H-bridge motor control
- 300 µV maximum input offset voltage in an 8-pin MINI-SO package delivers high accuracy in compact, space-constrained power monitoring designs
Applications
The MAX40056TAUA+ is ideally suited for high-side current monitoring in motor drive systems, where PWM switching noise from the inverter stage would corrupt measurements from standard amplifiers. Its bidirectional sensing capability makes it equally effective in battery charge/discharge monitoring for energy storage systems and UPS designs. Industrial power supplies and DC-DC converter output current control loops also benefit from its 100 dB minimum CMRR and chopper-stabilized precision.
Specifications
| Manufacturer Package Code | 8-MINI_SO-N/A |
| Date Of Intro | 2019-01-16 |
| YTEOL | 9 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | CHOPPER-STAB |
| Average Bias Current-Max (IIB) | 30 µ A |
| Common-mode Reject Ratio-Min | 100dB |
| Common-mode Reject Ratio-Nom | 140dB |
| Frequency Compensation | YES |
| Input Offset Voltage-Max | 300 µ V |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e3 |
| Low-Bias | NO |
| Low-Offset | NO |
| Micropower | NO |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.19 |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Power | NO |
| Programmable Power | NO |
| Screening Level | AEC-Q100 |
| Slew Rate-Nom | 1.5V/us |
| Supply Current-Max | 9mA |
| Supply Voltage Limit-Max | 70V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Wideband | NO |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
| Country of Origin | Japan, Mainland China, Malaysia, Philippines, Singapore, South Korea, Taiwan, Thailand, USA |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the MAX40056TAUA+ achieve accurate current sensing in a PWM motor drive environment?
The MAX40056TAUA+ uses a dedicated PWM-rejection circuit combined with a chopper-stabilized operational amplifier to suppress the high-frequency switching transients generated by motor drive PWM frequencies, typically ranging from 1 kHz to 100 kHz. This allows the amplifier's 140 dB nominal CMRR to measure the small differential voltage across a current sense resistor accurately, even when the common-mode voltage is rapidly switching between ground and the supply rail.
What input offset performance does the MAX40056TAUA+ deliver and why does it matter for low-current measurement?
The MAX40056TAUA+ specifies a maximum input offset voltage of 300 µV, which directly limits the minimum measurable current when used with a shunt resistor. For a 10 mΩ shunt, the 300 µV offset represents a worst-case error of 30 mA. The chopper-stabilized architecture further reduces long-term drift, making the device suitable for precision current measurement in battery management systems requiring accuracy over a wide temperature range of -40°C to +125°C.
For a bidirectional H-bridge motor controller, how does the MAX40056TAUA+ simplify the current sensing circuit compared to unidirectional amplifiers?
A unidirectional current sense amplifier in an H-bridge requires two separate devices with output switching logic to determine current direction, adding BOM cost and PCB area. The MAX40056TAUA+ handles bidirectional current flow in a single 8-pin MINI-SO package, outputting a voltage proportional to current magnitude and polarity directly. This single-device solution reduces component count, simplifies PCB layout, and eliminates potential signal discontinuities at the zero-current crossover point critical to torque control accuracy.
When does the 100 dB minimum CMRR of the MAX40056TAUA+ provide a procurement advantage over a general-purpose op-amp for high-side sensing?
A general-purpose op-amp typically specifies CMRR of 60 dB to 80 dB, which is insufficient for high-side current sensing on a 48 V bus where 300 mV of common-mode ripple would introduce 3 mV to 10 mV of error at the output. The MAX40056TAUA+'s 100 dB minimum CMRR reduces that same ripple to under 30 µV of error, enabling accurate 1% current measurements without external filtering. This eliminates the need for a discrete difference amplifier, reducing system cost in industrial 24 V and 48 V power supply designs.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
More from Analog Devices
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 100+ | $2.9300 | $293.00 |
| 250+ | $2.7900 | $697.50 |
| 500+ | $2.5300 | $1265.00 |
| 1000+ | $1.8500 | $1850.03 |
| 2500+ | $1.7928 | $4482.07 |
| 5000+ | $1.7584 | $8791.75 |
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