ADA4841-1YRZ Analog Devices, ADA4841-1YRZ Datasheet - Page 16

• Manufacturer Part Number: ADA4841-1YRZ
• Manufacturer: Analog Devices

ADA4841-1
POWER-DOWN OPERATION
Figure 46 shows the ADA4841-1 power-down circuitry. If the
POWER DOWN pin is left unconnected, the base of Qx is
pulled high by resistor Y and the part is turned on. Pulling the
power-down pin approximately 1.7 V below the positive supply
turns the part off, reducing the supply current to approximately
40 μA.
The POWER DOWN pin is protected with ESD clamps,
as shown in Figure 46. Voltages beyond the power supplies
cause these diodes to conduct. The guidelines for limiting the
overload current in the input protection section should also be
followed for the POWER DOWN pin.
VCC
VEE
Figure 46. Power-Down Circuit
I
BIAS
AMPLIFIER
BIAS
TO
ESD
ESD
POWER DOWN
Rev. A | Page 16 of 20