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MAX4158ESA from MAXIM,MAXIM - Dallas Semiconductor

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MAX4158ESA

Manufacturer: MAXIM

350MHz/250MHz / 2-Channel Video Multiplexer-Amplifiers

Partnumber Manufacturer Quantity Availability
MAX4158ESA MAXIM 53 In Stock

Description and Introduction

350MHz/250MHz / 2-Channel Video Multiplexer-Amplifiers The MAX4158ESA is a high-speed, low-power operational amplifier (op-amp) manufactured by Maxim Integrated. Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Manufacturer:** Maxim Integrated  
- **Part Number:** MAX4158ESA  
- **Package:** 8-pin SOIC (Small Outline Integrated Circuit)  
- **Supply Voltage Range:** ±2.25V to ±6V (Dual Supply) or +4.5V to +12V (Single Supply)  
- **Input Offset Voltage:** 0.5mV (max)  
- **Input Bias Current:** 1µA (max)  
- **Gain Bandwidth Product (GBWP):** 50MHz  
- **Slew Rate:** 20V/µs  
- **Quiescent Current:** 3.5mA per amplifier (typical)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Output Current:** ±30mA (short-circuit protected)  
- **Common-Mode Rejection Ratio (CMRR):** 80dB (min)  
- **Power Supply Rejection Ratio (PSRR):** 80dB (min)  

### **Descriptions:**
The MAX4158ESA is a high-speed, low-power op-amp designed for applications requiring wide bandwidth and fast settling time. It is optimized for single or dual-supply operation, making it suitable for battery-powered and precision analog circuits. The device features low distortion and high output drive capability, making it ideal for video, communications, and signal conditioning applications.

### **Features:**
- **High-Speed Performance:** 50MHz GBWP and 20V/µs slew rate  
- **Low Power Consumption:** 3.5mA per amplifier (typical)  
- **Wide Supply Range:** ±2.25V to ±6V or +4.5V to +12V  
- **Low Input Offset Voltage:** 0.5mV (max)  
- **Rail-to-Rail Output Swing**  
- **Short-Circuit Protected Output**  
- **Unity-Gain Stable**  
- **Low Distortion:** Suitable for high-fidelity signal processing  
- **Available in 8-pin SOIC Package**  

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

Application Scenarios & Design Considerations

350MHz/250MHz / 2-Channel Video Multiplexer-Amplifiers# Technical Documentation: MAX4158ESA Low-Cost, SOT23, Micropower Op Amp

 Manufacturer : MAXIM (now part of Analog Devices Inc.)
 Component : MAX4158ESA
 Description : Single, Low-Cost, Micropower Operational Amplifier in 8-SOIC Package

---

## 1. Application Scenarios

### Typical Use Cases
The MAX4158ESA is a versatile, low-power operational amplifier designed for applications where space, cost, and power consumption are critical constraints. Its primary use cases include:

*    Portable and Battery-Powered Equipment:  Due to its micropower operation (typ. 25µA supply current), it is ideal for handheld meters, medical sensors, remote monitors, and wearable devices where maximizing battery life is paramount.
*    Signal Conditioning for Sensors:  It excels at amplifying weak signals from transducers such as thermocouples, piezoelectric sensors, photodiodes, and pressure sensors. Its low input bias current (typ. 1pA) minimizes loading on high-impedance sensor outputs.
*    Active Filtering:  Suitable for implementing low-frequency active filters (e.g., anti-aliasing, tone control) in audio paths or data acquisition systems, where its low power and small footprint are advantageous.
*    Voltage Followers/Buffers:  Provides high input impedance and low output impedance to isolate stages within a circuit, preventing interaction between sensitive signal sources and subsequent processing stages.
*    Comparator Applications (with caveats):  While not a dedicated comparator, its rail-to-rail output swing can be used in non-critical, low-speed threshold detection circuits where propagation delay is not a concern.

### Industry Applications
*    Consumer Electronics:  Audio pre-amplifiers, headphone drivers, and signal conditioning in portable media players.
*    Industrial Instrumentation:  Process control loops, 4-20mA transmitter interfaces, and data logger front ends.
*    Medical Devices:  Portable ECG/EEG monitors, pulse oximetry sensors, and battery-operated diagnostic equipment.
*    Automotive (Non-Safety Critical):  Sensor interfaces for climate control, seat position sensors, and low-bandwidth monitoring circuits.
*    IoT/Embedded Systems:  Signal conditioning for environmental sensors (temperature, humidity) in wireless sensor nodes and gateways.

### Practical Advantages and Limitations
 Advantages: 
*    Ultra-Low Power Consumption:  Typical supply current of 25µA enables years of operation on small coin-cell batteries.
*    Low Cost:  Provides a high-performance-to-cost ratio for cost-sensitive designs.
*    Rail-to-Rail Output Swing:  Maximizes dynamic range in low-supply-voltage applications (2.7V to 5.5V).
*    Small Package (SOIC-8):  Saves valuable PCB real estate.
*    Excellent DC Precision:  Low input offset voltage (max. 3.5mV) and low input bias current ensure accurate signal amplification.

 Limitations: 
*    Limited Bandwidth (GBW typ. 125kHz):  Not suitable for high-frequency signal processing (>10kHz with significant gain), audio full-bandwidth applications, or fast transient response requirements.
*    Slew Rate Limited (typ. 0.04V/µs):  Can cause distortion on signals with fast edges or high amplitudes at higher frequencies.
*    Not Unity-Gain Stable:  The datasheet specifies a minimum stable gain of +5V/V (14dB). Using it at lower gains can lead to oscillation.
*    Limited Output Current:  Capable of sourcing/sinking only a few milliamps, making it unsuitable for driving heavy loads like speakers or motors directly.

---

## 2. Design Considerations

### Common Design Pitfalls and Solutions
1.   Pitfall: Oscillation at Low

Alternative Part Number

  • AD8072ARZ --: Dual video op-amp with similar bandwidth and supply range, pin-compatible SOIC-8 layout, widely available and a common drop-in for MAX4158 video buffer applications.
  • LMH6643MA --: Low-power dual video amplifier with comparable slew rate and output drive, suitable replacement in video distribution and buffer circuits.
  • EL2250CSZ --: Dual high-speed video op-amp offering similar gain-bandwidth and supply voltage, usable as a functional substitute where exact MAX4158 specs are not critical.
  • AD818ARZ --: High-speed video op-amp with similar bandwidth and slew rate, widely available and pin-compatible in many video buffer applications.
  • LT1227CS8 --: Fast current-feedback amplifier offering comparable video performance and supply range, suitable as a functional substitute.
  • EL2044CN --: Low-power high-speed video amplifier with similar gain-bandwidth characteristics, usable in place of the MAX4158 in many designs.

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