Datasheet

Data Sheet ADA4891-1/ADA4891-2/ADA4891-3/ADA4891-4
Rev. E | Page 5 of 24
Parameter Test Conditions/Comments Min Typ Max Unit
Input Bias Current −50 +2 +50 pA
ADA4891-1W/ADA4891-2W/ADA4891-4W only,
T
MIN
to T
MAX
−50 +50 nA
Open-Loop Gain R
L
= 1 kΩ to 1.5 V 72 76 dB
ADA4891-1W/ADA4891-2W/ADA4891-4W only,
T
MIN
to T
MAX
, R
L
= 1 kΩ to 1.5 V
60 dB
R
L
= 150 Ω to 1.5 V 65 dB
INPUT CHARACTERISTICS
Input Resistance 5 GΩ
Input Capacitance 3.2 pF
Input Common-Mode Voltage Range −V
S
− 0.3 to
+V
S
− 0.8
V
Common-Mode Rejection Ratio (CMRR) V
CM
= 0 V to 1.5 V 87 dB
OUTPUT CHARACTERISTICS
Output Voltage Swing R
L
= 1 kΩ to 1.5 V 0.01 to 2.98 V
R
L
= 150 Ω to 1.5 V
0.07 to 2.87
V
Output Current 1% THD with 1 MHz, V
O
= 2 V p-p 37 mA
Short-Circuit Current
Sourcing 80 mA
Sinking 163 mA
POWER-DOWN PINS (
PD1
,
PD2
,
PD3
) ADA4891-3 only
Threshold Voltage, V
TH
1.3 V
Bias Current Part enabled 48 nA
Part powered down −13 µA
Turn-On Time Part enabled, output rises to 90% of final value 185 ns
Turn-Off Time Part powered down, output falls to 10% of final
value
58 ns
POWER SUPPLY
Operating Range 2.7 5.5 V
Quiescent Current per Amplifier 3.5 mA
Supply Current When Powered Down ADA4891-3 only 0.73 mA
Power Supply Rejection Ratio (PSRR)
Positive PSRR
+V
S
= 3 V to 3.15 V, −V
S
= 0 V
76
dB
Negative PSRR +V
S
= 3 V, −V
S
= −0.15 V to 0 V 72 dB
OPERATING TEMPERATURE RANGE −40 +125 °C