MAX40056F
Bidirectional Current Sense Amplifier with PWM-Rejection
Enabling Dramatic Size and Performance Improvement for In-Phase Measurement in DC Servo Drives
Top
Overview
Features and Benefits
- AEC-Q100
- Fast, 500ns PWM Edge recovery from 500V/µs PWM Edges
- 60dB AC CMRR Rejection at 50V, ±500V/µs PWM Edges
- 140dB DC CMRR Rejection
- -0.1V to +65V Input Voltage Range
- -5V to +70V Protective Immunity
- 300kHz, -3dB Bandwidth
- Multiple Gain Options; 10V/V, 20V/V, 50V/V
- Internal, 1% Reference for Bidirectional Offset
- 5µV (Typ) Input Offset Voltage
- Rail-to-Rail Output
- 2.02mm x 1.4mm, 8-bump WLP and 8-pin µMAX
- -40°C to +125°C Temperature Range
Product Details
The MAX40056 is a bidirectional current-sense amplifier with an input common-mode range that extends from -0.1V to +65V together with protection against negative inductive kickback voltages to -5V. This CSA is well-suited for phase current monitoring of inductive loads, such as motors and solenoids, where pulse width modulation is used to control the drive voltage and current. The MAX40056 uses an improved technique to help reject common-mode input PWM edges with slew rates up to and beyond ±500V/µs. Common mode rejection ratio (CMRR) is typically 60dB (50V, ±500V/µs input) and 140dB DC, typical.
The MAX40056 has an internal +1.5V reference for use with a nominal +3.3V power supply. The reference can also be used to drive an adjoining differential ADC. The reference is used to offset the output to indicate the direction of the input sensed current. The REF pin can source current into external loads and helps to avoid the performance compromises resulting from routing reference voltages across noisy PCBs. Alternatively, for higher supply voltages and higher full-scale output swings, the internal reference can be overridden by a higher voltage, external reference.
The internal or external reference can be used to define the trip threshold for the integrated overcurrent comparator. This can provide immediate indication of an overcurrent fault condition.
The MAX40056 operates over the full -40°C to +125°C temperature range and runs from a supply voltage of +2.7V to +5.5V. It is offered in a 2.02mm x 1.4mm 8-pin wafer-level package (WLP) and 8-pin µMAX packages.
Design Solution: How Less Can Be More in Motor Control Design ›
Applications
- Automotive
- Battery Stack Monitors
- Current Monitoring of Inductive Loads
- PWM H-Bridge Motor In-line/In-phase/Winding Current Sensing
- Solenoid Current Sensing
Product Categories
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
-
MAX40056F Reliability Data10/10/2022
Tools & Simulations
SPICE Model
LIB
MAX40056F SPICE Macro Model
11.67K
Product Recommendations
MAX40056F Companion Parts
Recommended Related Parts
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| MAX40056FAUA+ | Material Declaration | Reliability Data | 8-MINI_SO-N/A | |
| MAX40056FAUA+T | Material Declaration | Reliability Data | 8-MINI_SO-N/A | |
| MAX40056FAUA/V+ | Material Declaration | Reliability Data | 8-MINI_SO-N/A | |
| MAX40056FAUA/V+T | Material Declaration | Reliability Data | 8-MINI_SO-N/A | |
| MAX40056FAWA+ | Material Declaration | Reliability Data | 8-WLCSP-N/A | |
| MAX40056FAWA+T | Material Declaration | Reliability Data | 8-WLCSP-N/A | |
| Wafer Fabrication Data | MAX40056F Reliability Data |
Support & Discussions
Sample & Buy
Ordering FAQs
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
Please see the latest communication from our CCO regarding lead times.
Sampling
A Sample link will be shown above, next to the part, only for parts that are included in our sample program. Selecting the Sample button will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.
Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.