LM10CN

LM10CN: Precision Voltage Reference and Operational Amplifier

Overview

The LM10CN is a monolithic linear integrated circuit that combines a precision voltage reference, an adjustable reference buffer, and an operational amplifier in a single package. Designed for high accuracy and stability, this IC is well-suited for applications requiring precise voltage regulation and signal conditioning. The device operates over a wide temperature range and provides excellent performance in industrial, automotive, and instrumentation systems.

The LM10CN integrates multiple functions into one chip, reducing component count and board space while improving system reliability. Its precision reference and operational amplifier are carefully matched to ensure minimal drift and high linearity across varying operating conditions.

Key Features

• Combination of precision reference and operational amplifier
• Low input offset voltage: 2.0 mV (maximum)
• Adjustable reference output
• Wide operating voltage range
• Low power consumption
• Excellent temperature stability
• High output current capability
• Internal frequency compensation
• Standard 8-pin DIP package

Applications

The LM10CN's unique combination of features makes it ideal for various precision applications:

• Precision voltage regulators
• Current sources and sinks
• Instrumentation amplifiers
• Data acquisition systems
• Process control systems
• Battery-powered equipment
• Test and measurement instruments
• Analog computing circuits

Electrical Characteristics

The following table summarizes the key electrical specifications of the LM10CN:

Reference Section

• Output voltage: 200 mV (adjustable)
• Line regulation: 0.01%/V (typical)
• Load regulation: 0.1% (typical)
• Temperature coefficient: 20 ppm/°C (typical)
• Output current: 20 mA (maximum)

Operational Amplifier Section

• Input offset voltage: 2.0 mV (maximum)
• Input bias current: 50 nA (typical)
• Input offset current: 5 nA (typical)
• Large signal voltage gain: 200 V/mV (typical)
• Supply voltage rejection ratio: 100 dB (typical)
• Common mode rejection ratio: 90 dB (typical)
• Slew rate: 0.2 V/μs (typical)
• Gain bandwidth product: 1 MHz (typical)

General Characteristics

• Supply voltage range: ±1.1V to ±20V
• Quiescent current: 1.1 mA (typical)
• Operating temperature range: 0°C to +70°C

Package Information

The LM10CN is available in a standard 8-pin plastic dual in-line package (PDIP):

• Package type: PDIP-8
• Package dimensions: 9.81 mm x 6.35 mm
• Lead pitch: 2.54 mm
• Lead material: Copper alloy
• Finish: Matte tin
• Moisture sensitivity level (MSL): 1
• RoHS compliant: Yes

Detailed Description

The LM10CN integrates three main functional blocks: a precision voltage reference, an adjustable reference buffer, and an operational amplifier. The voltage reference provides a stable 200 mV output that can be adjusted using external resistors. The reference buffer allows this voltage to be used for biasing or as a precision voltage source. The operational amplifier features low offset voltage and high gain, making it suitable for precision amplification tasks.

The device's architecture ensures minimal interaction between the different sections, allowing each to perform at its optimum level. Careful design of the internal biasing networks provides stable operation across the full temperature range and supply voltage variations.

Typical Application Circuits

The LM10CN can be configured in various ways to suit different application requirements:

Precision Voltage Regulator

Using the internal reference and operational amplifier, the LM10CN can implement a precision voltage regulator with better than 0.1% regulation accuracy. The op-amp serves as the error amplifier in the feedback loop, comparing the output voltage with the precision reference.

Programmable Current Source

The combination of the voltage reference and operational amplifier allows the creation of precision current sources. By using an external sense resistor, the current can be precisely set and maintained regardless of load variations.

Design Considerations

When designing with the LM10CN, several factors should be considered:

• Proper bypassing of supply pins is essential for optimal performance
• The reference output should be loaded within its specified current limits
• PCB layout should minimize thermal gradients across the package
• For highest precision applications, external trimming may be required
• The device should be operated within its specified temperature range

Reliability and Quality

The LM10CN is manufactured using a high-reliability silicon-gate process and undergoes rigorous testing to ensure consistent performance. Each device is subjected to multiple quality checks including:

• 100% electrical testing at wafer level
• Final package electrical verification
• Automated optical inspection
• Sample-based reliability testing

Ordering Information

The device is available in several ordering options:

• Standard packaging: Tube (50 pieces)
• Alternative packaging: Tape and reel (2500 pieces)
• Temperature grade: Commercial (0°C to +70°C)

Environmental Compliance

The LM10CN meets or exceeds all relevant environmental standards:

• RoHS 6/6 compliant
• Halogen-free
• REACH compliant