Datasheet

ADA4432-1/ADA4433-1 Data Sheet

Rev. A | Page 16 of 28

ESD PROTECTION

All pins on the ADA4432-1 and ADA4433-1 are protected with

internal ESD protection structures connected to the power supply

pins (+V

and GND). These structures provide protection during

the handling and manufacturing process.

The outputs (OUT for the ADA4432-1 and +OUT and −OUT

for the ADA4433-1) can be exposed to dc voltages well above the

supply voltage in an overvoltage event; therefore, conventional

ESD structure protection cannot be used. Instead, the outputs

are protected by Analog Devices proprietary ESD devices, which

allow protection and recovery from an overvoltage event while

providing ESD protection well beyond the handling and

manufacturing requirements.

The outputs of the ADA4432-1 and ADA4433-1 are ESD

protected to survive ±8 kV and ±6 kV human body model

(HBM), respectively.

ENABLE/DISABLE MODES (ENA PIN)

The power-down or enable/disable (ENA) pin is internally pulled

up to +V

through a 250 kΩ resistor. When the voltage on this

pin is high, the amplifier is enabled; pulling ENA low disables

the ADA4432-1 and ADA4433-1, reducing the supply current

to a very low 13.5 µA. With no external connection, this pin

floats high, enabling the amplifier.

Table 9. ENA Pin Function

ENA Pin Input Device State

High (Logic 1) Enabled

Low (Logic 0) Disabled

High-Z (Floating) Enabled

OPERATING SUPPLY VOLTAGE RANGE

The ADA4432-1 and ADA4433-1 are specified over an operating

supply voltage range of 2.6 V to 3.6 V. This range establishes the

nominal utilization voltage at which the devices perform in

conformance with their specifications. The operating supply

voltage refers to sustained voltage levels and not to a momentary

voltage excursion that can occur due to variation in the output of

the supply regulator. When the devices operate at the limits of the

operating supply voltage range (2.6 V to 3.6 V), excursions that are

outside of this range, but less than the absolute maximum, can

lead to some performance degradation; however, they do not

damage the device.