ADA4096-2ACPZ-R7 AD [Analog Devices], ADA4096-2ACPZ-R7 Datasheet - Page 16

• Manufacturer Part Number: ADA4096-2ACPZ-R7
• Description: 30 V, Micropower, Overvoltage Protection
• Manufacturer: AD [Analog Devices]

ADA4096-2
INPUT OVERVOLTAGE PROTECTION
The
excursions up to 32 V outside each rail. This feature is of
particular importance in applications with power supply
sequencing issues that could cause the signal source to be active
before the supplies to the amplifier.
Figure 47 shows the input current limiting capability of the
ADA4096-2
resistor (red curves).
ADA4096-2
–1
–2
–3
–4
–5
–6
–7
7
6
5
4
3
2
1
0
–48 –40 –32 –24 –16 –8
(green curves) compared to using a 5 kΩ series
Figure 47. Input Current Limiting Capability
inputs are protected from input voltage
V
IN
0
(V)
8
LOW RDS
5kΩ SERIES RESISTOR
16
24
ON
32
SERIES FET
40
48
Rev. A | Page 16 of 20
Figure 47 was generated with the
ration with the supplies connected to GND (or ±15 V) and the
positive input swept until it exceeds the supplies by 32 V. In general,
input current is limited to 1 mA during positive overvoltage con-
ditions and 200 μA during negative undervoltage conditions. For
example, at an overvoltage of 20 V, the
limited to 1 mA, providing a current limit equivalent to a series
20 kΩ resistor. Figure 47 also shows that the current limiting
circuitry is active whether the amplifier is powered or not.
Note that Figure 47 represents input protection under abnormal
conditions only. The correct amplifier operation input voltage
range (IVR) is specified in Table 2 to Table 4.
ADA4096-2
ADA4096-2
in a buffer configu-
Data Sheet
input current is