Description
The AXOP34062 (dual), and AXOP34064 (quad) are dual and quad high voltage (3V to 40V) operational
amplifiers (opamps) with rail-to-rail input and output swing capabilities. These devices are very suitable
for applications where high voltage operation, a small footprint, and high capacitive load drive are
required. AXOP34062S and AXOP34064S are with Shutdown function.
Features
▪ Supply voltages from 3V to 40V
▪ Excellent THD+N 100dB
▪ Excellent SNR 110dB
▪ Rail-to-rail input and output
▪ Low input offset voltage: ±0.5mV typ
▪ Unity-gain bandwidth: 25MHz
▪ Low quiescent current (per opamp): 600µA typ @40V
▪ Easier to stabilize with higher capacitive load due to resistive open-loop output impedance
▪ Shutdown function (AXOP34062S and AXOP34064S)
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
Figure 2 Typical Application Circuit (Low Side Current Sense)
2 Pin Description
2.1 AXOP34062A/B/C/D Pinouts
2.2 AXOP34062SA/B Pinouts
2.3 AXOP34064A/B Pinouts
Figure 5 AXOP34064A/B Pinouts
2.4 AXOP34064S Pinouts
3 Electrical Specifications
3.1 Absolute Maximum Ratings
3.2 Thermal Data
3.3 ESD and Latch Up
3.4 Electrical Characteristics
For Vs = (V+) - (V-) = 40V at Ta = 25°C, RL = 10kΩ connected to Vs/2, Vcm = Vs/2, and Vout
= Vs/2 (unless otherwise noted).
4 Functional Description
4.1 Overview
The AXOP3406x devices are a family of high voltage, rail-to-rail input and output opamps.
These devices operate from 3V to 40V, 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
The input common mode voltage range of the AXOP3406x family extends 100mV beyond the
supply rails for the full supply voltage range of 3V to 40V. This performance is achieved with a
complementary input stage: a N-channel input differential pair in parallel with a P-channel
differential pair, as shown in Figure 1. The N-channel pair is active for input voltages close to
the positive rail, typically (V+)-1.4V to 200mV above the positive supply, whereas the P
channel pair is active for inputs from 200mV below the negative supply to approximately (V+)-
1.4V. There is a transition region, in which both pairs are on. Within this transition region,
PSRR, CMRR, offset voltage, offset drift, and THD can degrade compared to device operation
outside this region.
4.3 Rail to Rail Output
Designed as a low power, low voltage operational amplifier, the AXOP3406x 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
10mV (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.
4.4 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
AXOP3406x family is approximately 300ns.
4.5 EMI Rejection
The AXOP3406x 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.
4.6 Shutdown
The AXOP3406xS has shutdown function. The amplifiers can be shut down by enabling the
respective shutdown pin.