Overview
The LM1877N-9A is a monolithic dual power amplifier designed and manufactured by National Semiconductor, now part of Texas Instruments. This amplifier is engineered to deliver 2W/channel continuous into 8Ω loads, making it suitable for a variety of audio applications. It operates with a low number of external components, providing flexibility and high performance in various audio systems.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Supply Voltage | 26 | V | |||
| Input Voltage | ±0.7 | V | |||
| Operating Temperature | 0 | 70 | °C | ||
| Storage Temperature | -65 | 150 | °C | ||
| Junction Temperature | 150 | °C | |||
| Output Power (THD = 10%) | VS = 20V, RL = 8Ω | 2.0 | W/Ch | ||
| Total Harmonic Distortion | f = 1 kHz, VS = 14V, PO = 1 W/Channel | 0.055 | % | ||
| Channel Separation | CF = 50 μF, CIN = 0.1 μF, f = 1 kHz, Output Referred | -50 | -70 | dB | |
| PSRR Power Supply Rejection Ratio | CF = 50 μF, CIN = 0.1 μF, f = 120 Hz, Output Referred | -50 | -65 | dB | |
| Equivalent Input Noise | RS = 0, CIN = 0.1 μF, BW = 20 Hz–20 kHz | 2.5 | μV | ||
| Open Loop Gain | RS = 0, f = 100 kHz, RL = 8Ω | 70 | dB |
Key Features
- 2W/channel continuous into 8Ω loads
- −65 dB ripple rejection, output referred
- −65 dB channel separation, output referred
- Wide supply range, 6V–24V
- Very low cross-over distortion
- Low audio band noise
- AC short circuit protected
- Internal thermal shutdown
Applications
- Multi-channel audio systems
- Stereo phonographs
- Tape recorders and players
- AM-FM radio receivers
- Servo amplifiers
- Intercom systems
- Automotive products
Q & A
- What is the maximum output power of the LM1877N-9A?
The LM1877N-9A can deliver up to 2W/channel continuous into 8Ω loads at a supply voltage of 20V.
- What is the operating temperature range of the LM1877N-9A?
The operating temperature range is from 0°C to +70°C.
- What is the channel separation of the LM1877N-9A?
The channel separation is typically −70 dB, output referred, at 1 kHz.
- Does the LM1877N-9A have built-in protection features?
Yes, it includes AC short circuit protection and internal thermal shutdown.
- What is the power supply rejection ratio (PSRR) of the LM1877N-9A?
The PSRR is typically −65 dB, output referred, at 120 Hz.
- What are the typical applications of the LM1877N-9A?
It is used in multi-channel audio systems, stereo phonographs, tape recorders and players, AM-FM radio receivers, servo amplifiers, intercom systems, and automotive products.
- What is the equivalent input noise of the LM1877N-9A?
The equivalent input noise is 2.5 μV over a bandwidth of 20 Hz–20 kHz.
- Is the LM1877N-9A internally compensated?
Yes, the LM1877N-9A is internally compensated for all gains greater than 10.
- What is the open loop gain of the LM1877N-9A?
The open loop gain is 70 dB at 100 kHz.
- What are the package options for the LM1877N-9A?
The LM1877N-9A is available in SOIC and PDIP packages.
- Is the LM1877N-9A still in production?
No, the LM1877N-9A is now obsolete.
