Datasheet

Data Sheet ADA4850-1/ADA4850-2
Rev. C | Page 13 of 16
Figure 40 shows the output recovery transients for the amplifier
recovering from a saturated output from the top and bottom
supplies to a point at midsupply.
Figure 40. Overload Recovery
OPERATING THE ADA4850-1/ADA4850-2 ON
BIPOLAR SUPPLIES
The ADA4850-1/ADA4850-2 can operate on bipolar supplies
up to ±5 V. The only restriction is that the voltage between −V
S
and the POWER DOWN pin must not exceed 6 V. Voltage
differences greater than 6 V can cause permanent damage to the
amplifier. For example, when operating on ±5 V supplies, the
POWER DOWN pin must not exceed +1 V.
POWER-DOWN PINS
The ADA4850-1/ADA4850-2 feature an ultralow power-down
mode that lowers the supply current to less than 150 nA. When
a power-down pin is brought to within 0.6 V of the negative
supply, the amplifier is powered down. Table 5 outlines the
power-down pins functionality. To ensure proper operation, the
power-down pins (PD1, PD2) should not be left floating.
Table 5. Power-Down Pins Functionality
Supply Voltage
3 V and 5 V
ADA4850-1 ADA4850-2
Power Down 0 V to 0.7 V 0 V to 0.6 V
Enabled
0.8 to +V
S
1.7 V to +V
S
6.5
–1.5
0
100
05320-042
TIME (ns)
INPUT AND OUTPUT VOLTAGE (V)
5.5
4.5
3.5
2.5
1.5
0.5
–0.5
10 20 30 40 50 60 70 80 90
V
S
= 5V
G = –1
R
L
= 1kΩ
INPUT
VOLTAGE
EDGES
V
OUT
= +2.5V TO 0V
V
OUT
= –2.5V TO 0V