Important Note
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TL072IP - Dual JFET-Input Operational Amplifier (Industrial Grade)

Details

Location: Cabinet-3, Bin 32, Section B
Category: Analog ICs
Brand: Texas Instruments
Part Number: TL072IP
Package: 8-DIP
Quantity: 8
Status: Available
Price Range: $1.50-3.50
Datasheet: TL072 Datasheet
Product URL: TI Product Page

Description

The TL072IP is the industrial temperature grade version of the popular TL072 dual JFET-input operational amplifier from Texas Instruments. Designed for applications requiring extended temperature operation from -40°C to +85°C, it provides the same excellent low input bias current, low noise, and high slew rate performance as the commercial grade TL072CP but with enhanced temperature specifications. The JFET input stage provides extremely high input impedance and low input bias current, making it ideal for precision applications, audio circuits, and active filters in industrial environments.

Specifications

Electrical Characteristics

Supply Voltage: ±2.25V to ±20V (4.5V to 40V single supply)
Input Offset Voltage: ±1mV to ±4mV typical
Input Offset Voltage Drift: ±2µV/°C typical
Input Bias Current: ±1pA to ±120pA (extremely low)
Input Impedance: Very high (JFET input)
Slew Rate: 20V/µs typical (high speed)
Gain-Bandwidth Product: 3MHz typical
Supply Current: 940µA per channel typical

Physical Characteristics

Package: 8-pin DIP (Dual In-line Package)
Dimensions: 0.300” (7.62mm) width
Pin Pitch: 0.100” (2.54mm)
Operating Temperature: -40°C to +85°C (Industrial Grade)
Lead Material: Standard DIP leads

Key Features

Dual independent JFET-input operational amplifiers
Industrial temperature range (-40°C to +85°C)
Extremely low input bias current (picoampere range)
Low noise: 37nV/√Hz at 1kHz
High slew rate for fast signal response
Wide supply voltage range
Low total harmonic distortion: 0.003% typical
Output short-circuit protection
Common-mode input voltage range includes V+

Pinout Diagram

    TL072IP 8-Pin DIP
    ┌─────────────┐
OUT1│1          8│ V+
IN1-│2          7│ OUT2
IN1+│3          6│ IN2-
V-  │4          5│ IN2+
    └─────────────┘

Pin Descriptions

Pin	Name	Description
1	OUT1	Output of amplifier 1
2	IN1-	Inverting input of amplifier 1
3	IN1+	Non-inverting input of amplifier 1
4	V-	Negative power supply
5	IN2+	Non-inverting input of amplifier 2
6	IN2-	Inverting input of amplifier 2
7	OUT2	Output of amplifier 2
8	V+	Positive power supply

Applications

Common use cases for the TL072IP:

Industrial audio preamplifiers and line drivers
Precision instrumentation in harsh environments
Active filters for industrial control systems
High-impedance buffer amplifiers in industrial settings
Sensor signal conditioning in extreme temperatures
Automotive and aerospace applications
Outdoor equipment and environmental monitoring
Industrial automation and control circuits

Circuit Examples

Industrial Sensor Interface

Sensor Output ---- IN1+ (Pin 3)
Reference ---- IN1- (Pin 2) via feedback network
Conditioned Output ---- OUT1 (Pin 1)
Operates reliably from -40°C to +85°C
High input impedance ideal for sensor interfaces

Precision Differential Amplifier

Signal+ ---- IN1+ (Pin 3)
Signal- ---- IN1- (Pin 2) via precision resistor network
Differential Output ---- OUT1 (Pin 1)
Industrial temperature range for harsh environments
Low drift performance across temperature range

Industrial Active Filter

Input Signal ---- R1 ---- IN1+ (Pin 3)
IN1- (Pin 2) ---- R2 ---- OUT1 (Pin 1)
C1 and C2 for frequency response shaping
Stable performance across industrial temperature range

Automotive Signal Conditioning

Automotive Sensor ---- IN1+ (Pin 3)
Ground Reference ---- IN1- (Pin 2) via bias network
ECU Interface ---- OUT1 (Pin 1)
Operates reliably in automotive temperature extremes

Programming Examples

Industrial Temperature Monitor

#define TEMP_SENSOR_1 A0  // Connected to TL072IP output 1
#define TEMP_SENSOR_2 A1  // Connected to TL072IP output 2
#define ALARM_OUTPUT 13
 
void setup() {
  pinMode(ALARM_OUTPUT, OUTPUT);
  Serial.begin(9600);
  analogReference(EXTERNAL);
}
 
void loop() {
  // Read temperature sensors through TL072IP amplifiers
  int temp1_raw = analogRead(TEMP_SENSOR_1);
  int temp2_raw = analogRead(TEMP_SENSOR_2);
  
  // Convert to temperature (example conversion)
  float temp1 = (temp1_raw * 5.0 / 1023.0 - 0.5) * 100.0; // LM35 formula
  float temp2 = (temp2_raw * 5.0 / 1023.0 - 0.5) * 100.0;
  
  // Check for over-temperature condition
  if(temp1 > 75.0 || temp2 > 75.0) {
    digitalWrite(ALARM_OUTPUT, HIGH);
    Serial.println("TEMPERATURE ALARM!");
  } else {
    digitalWrite(ALARM_OUTPUT, LOW);
  }
  
  Serial.print("Temp1: ");
  Serial.print(temp1, 1);
  Serial.print("°C  Temp2: ");
  Serial.print(temp2, 1);
  Serial.println("°C");
  
  delay(1000);
}

Industrial Data Acquisition

void industrialDataLogger() {
  static float readings[2][100]; // Store 100 readings per channel
  static int index = 0;
  
  // Read both channels
  readings[0][index] = analogRead(A0) * (5.0 / 1023.0);
  readings[1][index] = analogRead(A1) * (5.0 / 1023.0);
  
  index = (index + 1) % 100;
  
  // Calculate statistics every 100 readings
  if(index == 0) {
    for(int ch = 0; ch < 2; ch++) {
      float sum = 0, min_val = 5.0, max_val = 0;
      
      for(int i = 0; i < 100; i++) {
        sum += readings[ch][i];
        if(readings[ch][i] < min_val) min_val = readings[ch][i];
        if(readings[ch][i] > max_val) max_val = readings[ch][i];
      }
      
      float avg = sum / 100.0;
      float range = max_val - min_val;
      
      Serial.print("CH"); Serial.print(ch+1);
      Serial.print(" Avg:"); Serial.print(avg, 3);
      Serial.print("V Range:"); Serial.print(range, 3);
      Serial.print("V  ");
    }
    Serial.println();
  }
}

Technical Notes

Important considerations for the TL072IP:

Industrial Temperature Range: Operates reliably from -40°C to +85°C
Input Protection: JFET inputs are sensitive to static discharge
Power Supply: Requires dual supply for best performance
Decoupling: Use 0.1µF ceramic capacitors on power supply pins
Temperature Drift: Excellent temperature stability across industrial range
Harsh Environment: Suitable for automotive, aerospace, and outdoor applications

Design Considerations

Industrial Applications

Temperature Range: Verified operation across -40°C to +85°C
Reliability: Enhanced specifications for industrial environments
Signal Integrity: Maintains performance in temperature extremes
Long-term Stability: Designed for continuous industrial operation

Precision Applications

Input Impedance: Take advantage of very high input impedance
Temperature Drift: Excellent stability across temperature range
Offset Voltage: Consider offset voltage in precision circuits
Matching: Use both amplifiers for differential applications

Industrial Grade Advantages

The TL072IP industrial grade provides:

Extended Temperature Range: -40°C to +85°C vs 0°C to +70°C for commercial
Enhanced Reliability: Tested and specified for harsh environments
Automotive Qualification: Suitable for automotive applications
Aerospace Applications: Meets requirements for aerospace environments
Outdoor Equipment: Reliable operation in extreme weather conditions
Industrial Automation: Proven performance in factory environments

Comparison with TL072CP

Parameter	TL072IP (Industrial)	TL072CP (Commercial)
Temperature Range	-40°C to +85°C	0°C to +70°C
Application	Industrial/Automotive	General/Commercial
Cost	Slightly higher	Standard
Reliability	Enhanced	Standard
Availability	Specialized	Wide

Notes

The TL072IP is the industrial temperature grade version of the popular TL072 dual JFET operational amplifier. Having 8 of these industrial-grade ICs provides excellent capability for applications requiring operation in harsh environments or extreme temperatures. The extended temperature range (-40°C to +85°C) makes them ideal for automotive, aerospace, outdoor equipment, and industrial automation applications. The JFET input stage offers the same superior performance as the commercial TL072CP with extremely low input bias current and excellent noise characteristics, but with enhanced temperature specifications. This substantial quantity enables multiple industrial projects and provides excellent backup availability for critical applications requiring reliable operation across temperature extremes.

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TL072IP - Dual JFET-Input Operational Amplifier (Industrial Grade)

Details

Description

Specifications

Electrical Characteristics

Physical Characteristics

Key Features

Pinout Diagram

Pin Descriptions

Applications

Circuit Examples

Industrial Sensor Interface

Precision Differential Amplifier

Industrial Active Filter

Automotive Signal Conditioning

Programming Examples

Industrial Temperature Monitor

Industrial Data Acquisition

Technical Notes

Design Considerations

Industrial Applications

Precision Applications

Industrial Grade Advantages

Comparison with TL072CP

Tags

Notes

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