LM2900 Quad Operational Amplifier

Overview

The LM2900 series is a family of quad operational amplifiers designed for single-supply operation with a wide voltage range. Each device contains four independent, dual-input internally compensated amplifiers optimized for large output voltage swing applications. The unique current mirror architecture enables non-inverting input functionality while maintaining excellent performance characteristics. These amplifiers are particularly suited for low-frequency analog circuits, waveform generation, and signal conditioning applications where single-supply operation is required.

Key Features

• Wide single supply voltage range: 4V to 32V DC
• Dual supply capability: ±2V to ±16V DC
• Supply current independent of supply voltage
• Low input bias current: 30nA (typical)
• High open-loop gain: 70dB (typical)
• Wide bandwidth: 2.5MHz unity gain
• Large output voltage swing: (V_CC-1)V_p-p
• Internal frequency compensation for unity gain stability
• Output short-circuit protection

Applications

Primary Application Areas

• AC amplifiers and signal conditioning circuits
• RC active filters
• Low-frequency waveform generation:
  • Triangle waves
  • Square waves
  • Pulse waveforms
• Tachometer circuits
• Low-frequency oscillator circuits
• Voltage-to-current converters
• Transducer amplifiers

Electrical Characteristics

Absolute Maximum Ratings

Stresses beyond those listed may cause permanent damage to the device.

• Supply Voltage (V_CC): 32V
• Differential Input Voltage: ±32V
• Input Voltage Range: -0.3V to +32V
• Output Short-Circuit Duration: Continuous
• Operating Temperature Range:
  • Commercial: 0°C to +70°C
  • Industrial: -40°C to +85°C
• Junction Temperature: 150°C
• Storage Temperature Range: -65°C to +150°C

DC Electrical Characteristics

V_CC = 5V, T_A = 25°C unless otherwise specified

• Input Offset Voltage: 2mV (typical), 5mV (maximum)
• Input Bias Current: 30nA (typical), 100nA (maximum)
• Input Offset Current: 3nA (typical), 30nA (maximum)
• Large Signal Voltage Gain: 70dB (typical)
• Supply Current (per amplifier): 1.1mA (typical), 2.0mA (maximum)
• Output Voltage Swing:
  • High Level: V_CC-1V (typical)
  • Low Level: 20mV (typical)

AC Electrical Characteristics

• Gain Bandwidth Product: 2.5MHz (typical)
• Slew Rate: 0.5V/μs (typical)
• Phase Margin: 45° (typical)
• Rise Time: 0.3μs (typical)

Package Information

Available Packages

• 14-Pin Plastic Dual-In-Line Package (N14A)
• 14-Pin Small Outline Package (M14A)

Package Dimensions

All dimensions in millimeters (inches)

• DIP Package (N14A):
  • Length: 19.05mm (0.750")
  • Width: 6.35mm (0.250")
  • Height: 4.57mm (0.180")
  • Lead Pitch: 2.54mm (0.100")
• SOIC Package (M14A):
  • Length: 8.65mm (0.340")
  • Width: 3.90mm (0.154")
  • Height: 1.75mm (0.069")
  • Lead Pitch: 1.27mm (0.050")

Design Considerations

Single-Supply Operation

The LM2900 is specifically designed for single-supply operation, making it ideal for battery-powered applications. The input common-mode range includes ground, allowing the device to process signals near ground potential without requiring negative supplies.

Current Mirror Architecture

The unique current mirror input stage provides several advantages:

• Eliminates the need for a separate non-inverting input stage
• Reduces component count in many applications
• Provides excellent phase margin for stability

Thermal Considerations

When operating at maximum supply voltages or in high ambient temperatures, proper thermal management should be considered. The device's junction temperature should not exceed 150°C. For continuous operation at high temperatures, derating the maximum power dissipation may be necessary.

Ordering Information

• LM2900N: 14-pin DIP package
• LM2900M: 14-pin SOIC package
• LM3900N: Alternate version with similar characteristics
• LM3301N: Alternate version with similar characteristics