Overview
The LM4132AMF-4.1/NOPB, produced by Texas Instruments, is a precision low dropout voltage reference in a SOT-23 package. This device is part of the LM4132 family, which offers performance comparable to the best laser-trimmed bipolar references but in cost-effective CMOS technology. The LM4132 uses EEPROM registers to correct for curvature, temperature coefficient, and accuracy, allowing for package-level programming to overcome assembly shifts. This makes it highly accurate and stable across various operating conditions.
The LM4132 is designed for space-critical applications, delivering up to 20 mA without requiring an output capacitor or buffer amplifier. It features low quiescent current (60 µA) and a low dropout voltage (400 mV), making it ideal for battery-powered solutions.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage Initial Accuracy (A Grade) | - | -0.05% | 0% | 0.05% | % |
| Temperature Coefficient (A Grade) | 0°C ≤ TJ ≤ 85°C | - | 10 ppm/°C | - | ppm/°C |
| Supply Current | -40°C ≤ TJ ≤ 125°C | - | 60 µA | 100 µA | µA |
| Line Regulation | VREF + 400 mV ≤ VIN ≤ 5.5 V | - | 85 ppm/V | - | ppm/V |
| Load Regulation | 0 mA ≤ ILOAD ≤ 25 mA | - | 25 ppm/mA | 120 ppm/mA | ppm/mA |
| Long-term Stability | 1000 Hrs | - | 50 ppm | - | ppm |
| Thermal Hysteresis | -40°C ≤ TJ ≤ 125°C | - | 75 ppm | - | ppm |
| Dropout Voltage | ILOAD = 10 mA | 175 mV | - | 400 mV | mV |
| Output Noise Voltage | 0.1 Hz to 10 Hz | - | 310 µVPP | - | µVPP |
Key Features
- High accuracy with initial accuracy as low as 0.05% (A Grade) and temperature coefficient as low as 10 ppm/°C.
- Low dropout voltage of 400 mV at 10 mA load current.
- Low quiescent current of 60 µA.
- No output capacitor or buffer amplifier required.
- Available in SOT-23 package, suitable for space-critical applications.
- Custom voltage options available from 1.8 V to 4.096 V.
- Stable with low-ESR ceramic capacitors.
- Five grades (A, B, C, D, E) for greater flexibility in application.
Applications
- Instrumentation and Process Control
- Test Equipment
- Data Acquisition Systems
- Base Stations
- Servo Systems
- Portable, Battery-Powered Equipment
- Automotive and Industrial
- Precision Regulators
- Battery Chargers
- Communications
- Medical Equipment
Q & A
- What is the typical output current of the LM4132?
The LM4132 can deliver up to 20 mA.
- What is the dropout voltage of the LM4132?
The dropout voltage is 400 mV at 10 mA load current.
- Does the LM4132 require an output capacitor or buffer amplifier?
No, the LM4132 does not require an output capacitor or buffer amplifier.
- What are the available voltage options for the LM4132?
The LM4132 is available with output voltages of 1.8 V, 2.048 V, 2.5 V, 3 V, 3.3 V, and 4.096 V, with custom options available.
- What is the quiescent current of the LM4132?
The quiescent current is 60 µA.
- What are the temperature coefficients for different grades of the LM4132?
The temperature coefficient varies from 10 ppm/°C for Grade A to 30 ppm/°C for Grade E.
- What is the long-term stability of the LM4132?
The long-term stability is 50 ppm over 1000 hours.
- What is the thermal hysteresis of the LM4132?
The thermal hysteresis is 75 ppm over the temperature range of -40°C to 125°C.
- In what package is the LM4132 available?
The LM4132 is available in a SOT-23 package.
- What are some common applications of the LM4132?
Common applications include instrumentation, test equipment, data acquisition systems, and battery-powered equipment.
