ADA4622-2ACPZ-R7 datasheet(28/36 Pages) AD

28 / 36 page

Data Sheet

ADA4622-1/ADA4622-2/ADA4622-4

THEORY OF OPERATION

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Rev. F | 28 of 36

Figure 86. Pulse Response with 500 pF Load Capacitance

SHUTDOWN OPERATION

Use the active low DISABLE input to put the ADA4622-1 into

shutdown mode. When the voltage on the DISABLE input is less

than 1.4 V above the negative supply voltage (V−), the ADA4622-1

shuts down and consumes only 50 µA to 60 µA (typical). When

the voltage on the DISABLE input is more than 1.4 V above

the negative supply voltage (V−), or if the DISABLE input is left

floating, the ADA4622-1 powers up. For best performance, it is

recommended that the input voltage level on the DISABLE input

be V− or that the input be left floating. The ADA4622-1 is still a

drop-in replacement for devices with standard single channel op

amp pinouts because the ADA4622-1 enables when the DISABLE

input is left floating. Figure 87 shows a simplified circuit for the

DISABLE input.

Figure 87. Simplified Circuit for the DISABLE Input

Figure 88 and Figure 89 show the start-up and shutdown response

when toggling the DISABLE input.

Figure 88. Start-Up Response when Toggling the DISABLE Input

Figure 89. Shutdown Response when Toggling the DISABLE Input

Figure 90 shows the DISABLE input current vs. the DISABLE input

voltage relative to the negative supply voltage (V−).

Figure 90. DISABLE Input Current vs. DISABLE Input Voltage Relative to V−

ADA4622-2ACPZ-R7 数据表(PDF) 28 Page - Analog Devices