MAX49925

RECOMMENDED FOR NEW DESIGNS

Bidirectional, Wide Positive and Negative Sensing Range, Current-Sense Amplifier with Fast PWM Rejection

Part Models
4
1ku List Price
Starting From $1.22
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Part Details

  • Fast, 500ns PWM Edge Recovery from >500V/ μs PWM Edges
  • 140dB DC CMRR Rejection
  • -40V to +76V Input Voltage Range
  • -42V to +80V Protective Immunity
  • 300kHz, -3dB Bandwidth
  • On-the-fly Programmable Gain with two input pins: 10V/V, 20V/V, 50V/V, 100V/V
  • 5μV (typ) Input Offset Voltage
  • ±0.3% (max) Gain Error
  • Rail-to-Rail Output
  • 3mm x 3mm, 10-Pin TDFN with Side-Wettable Flanks
  • -40°C to +125°C Temperature Range, Automotive Grade 2
  • AEC-Q100 Qualified
MAX49925
Bidirectional, Wide Positive and Negative Sensing Range, Current-Sense Amplifier with Fast PWM Rejection
MAX49925 Simplified Block Diagram MAX49925 Typical Application Circuit MAX49925 Pin Configuration
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Tools & Simulations

LTspice 1


Models for the following parts are available in LTspice:

  • MAX49925

SPICE Model 1

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.


Evaluation Kits

eval board
MAX49925EVKIT

Evaluation Kit for MAX49925

Features and Benefits

  • Selectable Gain Options: 10V/V, 20V/V, 50V/V, 100V/V
  • 5μV (Typ) Input Offset Voltage
  • ±0.3% (Max) Gain Error (Thin Film ~0.25%)
  • -0.3V to +65V Input Common-Mode Range
  • -40°C to +125°C Temperature Range
  • 3mm x 3mm 10-pin TDFN with Side Wettable Flanks
  • Proven 2” x 2” 2-Layer 2oz Copper PCB Layout
  • Demonstrates Compact Solution Size
  • Fully Assembled and Tested

Product Details

The MAX49925 evaluation kit (EV kit) is a fully tested and assembled circuit that demonstrates the capabilities of the MAX49925, high-precision, high-voltage, bidirectional current sense amplifier for PWM applications, such as servo motor control and solenoid drive. The MAX49925 are ideal for 48V, or less BLDC, induction motor applications (such as robotics), pick-and-place machines, 3D prints, or other servo motor control systems. The MAX49925 has an extended protective immunity from -42V to +80V, providing protection against reverse battery and high voltage spikes. This also can reduce the BOM complexity at the system level since a smaller TVS might be required. The MAX49925 EV kit is available in a 2” x 2” PCB and operates over the automotive temperature range of -40°C to +125°C. This EV kit demonstrates the MAX49925 in a 10-pin TDFN package, with four gain options 10V/V, 20V/V, 50V/V, 100V/V by the combination of the Gain1 and Gain2 pins.

MAX49925EVKIT
Evaluation Kit for MAX49925
MAX49925 EV Kit Board Image

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