OP400AY

The OP400 is the first monolithic quad operational amplifier that features OP77- type performance. Precision performance is not sacrificed with the OP400 to obtain the space and cost savings offered by quad amplifiers. Open- loop gain of the OP400 is more than 5 million into a 10kΩ load, input bias current is less than 3nA common- mode rejection (CMR) is more than 120 dB and power supply rejection ratio (PSRR) is less than 1.8μV/V. On- chip Zener cap trimming achieves the low input offset voltage of the OP400 and eliminates the need for offset nulling. The OP400 conforms to the industry- standard quad pinout, which does not have null terminals. The OP400 features low power consumption, drawing less than 725μA per amplifier. The total current drawn by this quad amplifier is less than that of a single OP07, yet the OP400 offers significant improvements over this industry- standard op amp. Voltage noise density of the OP400 is a low 11nV/√Hz at 10Hz half that of most competitive devices. The OP400 is an ideal choice for applications requiring multiple precision operational amplifiers and where low power consumption is critical.

Key features

• Low input offset voltage: 150μV (maximum)
• Low offset voltage drift over - 55°C to +125°C: 1.2μV/°C (maximum)
• Low supply current (per amplifier): 725μA (maximum)
• High open- loop gain: 5000V/mV (minimum)
• Input bias current: 3 nA (maximum)
• Low noise voltage density: 11nV/√Hz at 1 kHz
• Stable with large capacitive loads: 10 nF typical
• Available in die form