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MAX4212EUK from MAXIM,MAXIM - Dallas Semiconductor

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MAX4212EUK

Manufacturer: MAXIM, MAX

Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with Enable

Partnumber Manufacturer Quantity Availability
MAX4212EUK MAXIM, MAX 253 In Stock

Description and Introduction

Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with Enable The MAX4212EUK is a high-speed, low-power operational amplifier (op-amp) manufactured by Maxim Integrated (now part of Analog Devices). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Manufacturer:**  
Maxim Integrated (now Analog Devices)  

### **Part Number:**  
MAX4212EUK  

### **Package:**  
SOT23-5  

### **Type:**  
Operational Amplifier (Op-Amp)  

### **Key Specifications:**  
- **Supply Voltage Range:** +2.7V to +5.5V  
- **Bandwidth:** 200MHz (typical)  
- **Slew Rate:** 600V/µs (typical)  
- **Input Offset Voltage:** ±1mV (max)  
- **Input Bias Current:** 2µA (max)  
- **Quiescent Current:** 4.5mA (typical)  
- **Output Current:** ±60mA (typical)  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**  
- The MAX4212EUK is a high-speed, low-power op-amp designed for applications requiring wide bandwidth and fast slew rate.  
- It is optimized for single-supply operation and is suitable for video, RF, and other high-frequency signal processing.  
- The device features a shutdown mode to reduce power consumption when not in use.  

### **Features:**  
- **High Bandwidth:** 200MHz for high-speed signal amplification.  
- **Fast Slew Rate:** 600V/µs ensures minimal signal distortion.  
- **Low Power Consumption:** 4.5mA typical quiescent current.  
- **Single-Supply Operation:** Works from +2.7V to +5.5V.  
- **Shutdown Mode:** Reduces power consumption when disabled.  
- **Rail-to-Rail Output:** Maximizes dynamic range.  
- **Stable with Capacitive Loads:** Up to 10pF.  

### **Applications:**  
- Video amplification  
- RF signal processing  
- ADC/DAC buffers  
- High-speed data acquisition  
- Portable and battery-powered systems  

This information is based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

Miniature, 300MHz, Single-Supply, Rail-to-Rail Op Amps with Enable# Technical Documentation: MAX4212EUK High-Side Current-Sense Amplifier

 Manufacturer : Maxim Integrated (now part of Analog Devices)
 Component : MAX4212EUK
 Description : Precision, High-Side Current-Sense Amplifier with Voltage Output
 Package : SOT23-5

---

## 1. Application Scenarios

### Typical Use Cases
The MAX4212EUK is a precision, high-side current-sense amplifier designed to monitor current flow by measuring the voltage drop across a shunt resistor placed in the power supply path. Its primary function is to convert a small differential voltage (developed across the sense resistor) into a ground-referenced output voltage, proportional to the load current.

 Key Use Cases Include: 
*    Battery Charge/Discharge Monitoring:  Accurately measuring current flowing into or out of battery packs in portable devices, power tools, and energy storage systems to implement fuel gauging and protection circuits.
*    Power Supply Load Monitoring:  Providing real-time feedback on the current drawn by subsystems (e.g., processors, motor drives, LED arrays) for system health monitoring, fault detection, and adaptive power management.
*    Overcurrent Protection:  Enabling fast detection of fault conditions (short circuits, motor stalls) by comparing the amplifier's output voltage to a threshold set by a comparator, allowing for immediate system shutdown or current limiting.
*    DC Motor Control:  Measuring armature current in H-bridge or other motor drive configurations for torque control, closed-loop speed regulation, and stall detection.

### Industry Applications
*    Consumer Electronics:  Smartphones, tablets, laptops (for battery management and USB power delivery monitoring).
*    Industrial Automation:  Programmable Logic Controllers (PLCs), servo drives, and robotic systems for motor control and fault diagnostics.
*    Telecommunications:  Base station power amplifiers and server power supply units (PSUs) for monitoring rail currents.
*    Automotive:  12V/48V battery management systems (BMS), electric power steering (EPS), and infotainment system power monitoring (Note: Not an AEC-Q100 qualified part; for automotive, consider specified alternatives).
*    Test & Measurement Equipment:  Precision power supplies and electronic loads for current readback functionality.

### Practical Advantages and Limitations

 Advantages: 
*    High-Side Sensing:  Allows continuous monitoring without interrupting the ground path, which is critical for fault detection and systems with multiple grounds.
*    Wide Common-Mode Range:  Operates with a common-mode voltage (VCM) from +0.1V to +28V, independent of the supply voltage (VCC), making it suitable for monitoring various power rails (e.g., 5V, 12V, 24V).
*    Low Input Offset Voltage:  Typically 150µV (max 500µV), enabling accurate measurement of very small voltage drops across low-value sense resistors, minimizing power loss.
*    Fixed Gain:  Available in fixed gains of 20 V/V, 50 V/V, and 100 V/V (MAX4212EUK is typically the 100 V/V variant, suffix dependent). This eliminates gain error resistors and simplifies design.
*    Small Form Factor:  SOT23-5 package saves board space for portable applications.

 Limitations: 
*    Fixed Gain:  Lack of external gain programming can be a limitation if application requirements change, necessitating a different part variant or component.
*    Bandwidth:  The bandwidth (approx. 220kHz for G=100) is suitable for DC and low-frequency monitoring but may be insufficient for very high-speed switching current measurements (e.g., high-frequency switch-mode inductor current).
*    Single-Supply Operation:  While a benefit for simplicity, it requires the output to

Alternative Part Number

  • LMH6642MF --: High-speed voltage-feedback op amp with similar bandwidth and supply range, pin-compatible SOT-23-5 package, widely available and cost-effective.
  • AD8051ARTZ --: Comparable high-speed rail-to-rail op amp with similar gain-bandwidth and slew rate, SOT-23-5 package, good drop-in substitute.
  • OPA354AIDBVR --: Rail-to-rail CMOS high-speed op amp with similar bandwidth and supply voltage, SOT-23-5 package, suitable functional replacement.
  • LMH6611MF --: High-speed voltage-feedback op amp in SOT-23-5 with similar bandwidth and supply range, a common drop-in substitute for the MAX4212.
  • AD8061ARTZ --: Fast rail-to-rail op amp in SOT-23-5 offering comparable speed and drive capability, suitable as a functional replacement.
  • OPA356AIDBVR --: Wideband CMOS op amp in SOT-23-5 with similar gain-bandwidth and low input bias, usable where the MAX4212 is specified.

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