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MAX4394EUD+T from MAXIM,MAXIM - Dallas Semiconductor

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MAX4394EUD+T

Manufacturer: MAXIM

Ultra-Small, Low-Cost, 85MHz Op Amps with Rail-to-Rail Outputs and Disable

Partnumber Manufacturer Quantity Availability
MAX4394EUD+T MAXIM 2594 In Stock

Description and Introduction

Ultra-Small, Low-Cost, 85MHz Op Amps with Rail-to-Rail Outputs and Disable The MAX4394EUD+T is a high-speed, low-power operational amplifier (op-amp) manufactured by **Maxim Integrated** (now part of Analog Devices). Below are its key specifications, descriptions, and features based on factual data:

### **Specifications:**
- **Manufacturer:** Maxim Integrated  
- **Part Number:** MAX4394EUD+T  
- **Package:** 14-TSSOP  
- **Supply Voltage Range:** ±2.25V to ±6V (Dual Supply), 4.5V to 12V (Single Supply)  
- **Input Offset Voltage:** 0.5mV (max)  
- **Gain Bandwidth Product (GBW):** 200MHz  
- **Slew Rate:** 1000V/µs  
- **Quiescent Current:** 5.5mA per amplifier (typical)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Number of Channels:** 4 (Quad Op-Amp)  
- **Input Bias Current:** 2µA (max)  
- **Output Current:** ±60mA (short-circuit protected)  
- **Common-Mode Rejection Ratio (CMRR):** 80dB (min)  
- **Power Supply Rejection Ratio (PSRR):** 80dB (min)  

### **Descriptions:**
- The **MAX4394EUD+T** is a quad, high-speed, voltage-feedback operational amplifier optimized for low-power and high-speed applications.  
- It is designed for use in video processing, communications, medical imaging, and other precision signal conditioning circuits.  
- Features low distortion and high slew rate, making it suitable for driving ADCs, DACs, and transmission lines.  

### **Features:**
- **High Speed:** 200MHz GBW and 1000V/µs slew rate.  
- **Low Power:** Consumes only 5.5mA per amplifier.  
- **Wide Supply Range:** Operates from ±2.25V to ±6V (± supply) or 4.5V to 12V (single supply).  
- **Rail-to-Rail Output:** Ensures maximum dynamic range.  
- **Low Input Offset Voltage:** 0.5mV max for precision applications.  
- **Short-Circuit Protected Outputs:** Up to ±60mA.  
- **Stable with Capacitive Loads:** Up to 10pF.  
- **Available in 14-TSSOP Package:** Compact and space-saving.  

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

Application Scenarios & Design Considerations

Ultra-Small, Low-Cost, 85MHz Op Amps with Rail-to-Rail Outputs and Disable# Technical Documentation: MAX4394EUD+T Precision, Low-Power, Single-Supply Op-Amp

 Manufacturer : Maxim Integrated (now part of Analog Devices Inc.)
 Component : MAX4394EUD+T
 Description : Precision, Low-Power, Single-Supply Operational Amplifier
 Package : 14-TSSOP (Thin Shrink Small Outline Package)
 Ordering Code : MAX4394EUD+T (Tape and Reel)

---

## 1. Application Scenarios

The MAX4394EUD+T is a precision, low-power operational amplifier optimized for single-supply operation from +2.7V to +5.5V. Its combination of low offset voltage, low power consumption, and rail-to-rail input/output capability makes it suitable for a wide range of portable, battery-powered, and precision measurement applications.

### Typical Use Cases

*    Portable Instrumentation:  Ideal for signal conditioning in handheld multimeters, data loggers, and environmental sensors where battery life and accuracy are critical. The amplifier's low quiescent current (typically 750µA per amplifier) extends operational time.
*    Sensor Interface Circuits:  Commonly used to amplify signals from bridge sensors (e.g., strain gauges, pressure sensors), thermocouples, and photodiodes. Its rail-to-rail inputs allow it to handle signals near the supply rails, maximizing dynamic range in single-supply systems.
*    Active Filtering:  Suitable for implementing low-power, active low-pass, high-pass, or band-pass filters in audio processing, signal conditioning paths, or anti-aliasing stages preceding an ADC.
*    Voltage Followers/Buffers:  Its high input impedance and low output impedance make it effective for isolating sensitive signal sources from downstream circuitry, preventing loading effects.
*    Portable Medical Devices:  Used in applications like pulse oximeters, portable ECG monitors, and glucose meters, where precision and low power consumption are paramount.

### Industry Applications

*    Consumer Electronics:  Audio processing, touch screen controllers, and battery management systems in smartphones, tablets, and wearables.
*    Industrial Automation:  Process control loops, 4-20mA transmitter interfaces, and condition monitoring equipment.
*    Automotive Electronics:  Sensor signal conditioning in non-critical, low-voltage domains (e.g., cabin environment sensors), noting it is not typically qualified for AEC-Q100.
*    Test & Measurement:  Front-end amplifiers for portable oscilloscope probes and benchtop measurement equipment.

### Practical Advantages and Limitations

 Advantages: 
*    Single-Supply Operation:  Simplifies power supply design, eliminating the need for a negative rail in many applications.
*    Rail-to-Rail Input/Output (RRIO):  Maximizes signal swing and dynamic range, especially critical in low-voltage (e.g., 3.3V) systems.
*    Low Offset Voltage:  Typical Vos of 150µV ensures high DC accuracy in precision amplification tasks.
*    Low Power Consumption:  Extends battery life in portable devices.
*    Space-Efficient Package:  The 14-TSSOP package houses four independent amplifiers, offering high functional density.

 Limitations: 
*    Limited Bandwidth:  With a gain-bandwidth product (GBWP) of 1.2MHz, it is unsuitable for high-frequency applications (>100kHz) requiring fast settling times.
*    Moderate Slew Rate:  0.5V/µs limits its performance in applications requiring rapid large-signal voltage changes.
*    Not Rail-to-Rail at Both Supplies Simultaneously:  While inputs are RRI, the common-mode input range is typically from (V- - 0.2V) to (V+ - 1V). Outputs swing to within ~50mV of the rails.
*

Alternative Part Number

  • LMH6643MAX/NOPB --: Dual high-speed voltage-feedback op amp with similar bandwidth and supply range, widely available and pin-compatible in function.
  • AD8022ARZ --: Dual low-noise high-speed amplifier offering comparable AC performance and supply voltage, suitable as a functional replacement.
  • LT1819CS8#PBF --: Dual high-speed op amp with similar gain-bandwidth and slew rate, usable in the same signal-chain applications.
  • AD8029ARZ --: Low-power, high-speed rail-to-rail op-amp with similar bandwidth and supply range, suitable drop-in for video and signal buffering applications.
  • LMH6643MA --: Dual high-speed rail-to-rail output amplifier with comparable slew rate and bandwidth, commonly used as a MAX4394 replacement in video driver circuits.
  • OPA2354AIDGKR --: Dual CMOS rail-to-rail op-amp with similar supply voltage and speed characteristics, offering good availability and cost-effective alternative.

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