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產(chǎn)品名稱：AXOP32122/4/S 0.4μV Input Noise, 14V RRIO Operational Amplifiers (Dual/Quad)
型號： AXOP32122/4/S
產(chǎn)片介紹： Supply voltages from 3V to 14V Ultra-low input voltage noise (20Hz to 20kHz) 0 4μV Excellent THD+N 96dB Excellent SNR 120dB Rail-to-rail input and output Low input offset voltage: ±0 1mV typ Unity-gain bandwidth: 25MHz Low quiescent current (per opamp): 1 2mA typ @14V Shutdown function (AXOP32122S and AXOP32124S)

┄┄┄詳細(xì)介紹┄┄┄

Description

The AXOP32122 (dual), and AXOP32124 (quad) are ultra-low noise dual and quad mid voltage (3V to

14V) operational amplifiers (opamps) with rail-to-rail input and output swing capabilities. These devices

are very suitable for applications where ultra-low noise, high voltage operation and a small footprint.

AXOP32122S and AXOP32124S are with Shutdown function.

Features

? Supply voltages from 3V to 14V

? Ultra-low input voltage noise (20Hz to 20kHz) 0.4μV

? Excellent THD+N 96dB

? Excellent SNR 120dB

? Rail-to-rail input and output

? Low input offset voltage: ±0.1mV typ

? Unity-gain bandwidth: 25MHz

? Low quiescent current (per opamp): 1.2mA typ @14V

? Shutdown function (AXOP32122S and AXOP32124S)

Applications

? Infotainment system

? HVAC: heating, ventilating, and air conditioning

? Industrial control

? Test equipment

? Portable Equipment

? Active filters

? Data acquisition system

Table 1 Device Summary

1 Block Diagram and Application Circuit

2 Pin Description

2.1 AXOP32122A/B/C/D/E Pinouts

2.2 AXOP32122SA/B Pinouts

2.3 AXOP32124A/B/C Pinouts

AXOP32124A AXOP32124B AXOP32124C

2.4 AXOP32124SA/B Pinouts

3 Electrical Specifications

4 Functional Description

4.1 Overview

The AXOP3212x devices are a family of high voltage, rail-to-rail input and output opamps.

These devices operate from 3V to 14V, are unity gain stable, and are designed for a wide

range of applications and used in virtually any single supply application.

4.2 Rail to Rail Input and Output

The input common mode voltage range of the AXOP3212x family extends 100mV beyond the

supply rails for the full supply voltage range of 3V to 14V. This performance is achieved with a

complementary input stage: a NPN input differential pair in parallel with a PNP differential pair,

as shown in Figure 1.

Designed as a high voltage operational amplifier, the AXOP3212x series delivers a robust

output drive capability. A class AB output stage with common source Mosfets achieves full

rail-to-rail output swing capability. For resistive loads of 10kΩ, the output swings to within

60mV (typ) of either supply rail, regardless of the applied power supply voltage. Different load

conditions change the ability of the amplifier to swing close to the rails.

4.3 Overload Recovery

Overload recovery is defined as the time required for the opamp output to recover from a

saturated state to a linear state. The output devices of the opamp enter a saturation region

when the output voltage exceeds the rated operating voltage, because of the high input

voltage or the high gain. After the device enters the saturation region, the charge carriers in

the output devices require time to return to the linear state. After the charge carriers return to

the linear state, the device begins to slew at the specified slew rate. The overload recovery

time for the AXOP3212x family is approximately 20ns.

4.4 EMI Rejection

The AXOP3212x uses integrated electromagnetic interference (EMI) filtering to reduce the

effects of EMI from sources such as wireless communications and densely populated boards

with a mix of analog signal chain and digital components.

4.5 Shutdown

The AXOP3212xS has shutdown function. The amplifiers can be shut down by enabling the

respective shutdown pin

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