Datasheet

Data Sheet ADA4891-1/ADA4891-2/ADA4891-3/ADA4891-4
Rev. E | Page 3 of 24
SPECIFICATIONS
5 V OPERATION
T
A
= 25°C, V
S
= 5 V, R
L
= 1 kΩ to 2.5 V, unless otherwise noted. All specifications are for the ADA4891-1, ADA4891-2, ADA4891-3, and
ADA4891-4, unless otherwise noted. For the ADA4891-1 and ADA4891-2, R
F
= 604 Ω; for the ADA4891-3 and ADA4891-4, R
F
= 453 Ω,
unless otherwise noted.
Table 1.
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
DYNAMIC PERFORMANCE
−3 dB Small-Signal Bandwidth ADA4891-1/ADA4891-2, G = +1, V
O
= 0.2 V p-p 240 MHz
ADA4891-3/ADA4891-4, G = +1, V
O
= 0.2 V p-p 220 MHz
ADA4891-1/ADA4891-2, G = +2, V
O
= 0.2 V p-p,
R
L
= 150 Ω to 2.5 V
90 MHz
ADA4891-3/ADA4891-4, G = +2, V
O
= 0.2 V p-p,
R
L
= 150 Ω to 2.5 V
96 MHz
Bandwidth for 0.1 dB Gain Flatness ADA4891-1/ADA4891-2, G = +2, V
O
= 2 V p-p,
R
L
= 150 Ω to 2.5 V, R
F
= 604 Ω
25 MHz
ADA4891-3/ADA4891-4, G = +2, V
O
= 2 V p-p,
R
L
= 150 Ω to 2.5 V, R
F
= 374 Ω
25 MHz
Slew Rate, t
R
/t
F
G = +2, V
O
= 2 V step, 10% to 90% 170/210 V/µs
−3 dB Large-Signal Frequency Response G = +2, V
O
= 2 V p-p, R
L
= 150 Ω 40 MHz
Settling Time to 0.1% G = +2, V
O
= 2 V step 28 ns
NOISE/DISTORTION PERFORMANCE
Harmonic Distortion, HD2/HD3 f
C
= 1 MHz, V
O
= 2 V p-p, G = +1 −79/−93 dBc
f
C
= 1 MHz, V
O
= 2 V p-p, G = −1 −75/−91 dBc
Input Voltage Noise f = 1 MHz 9 nV/√Hz
Differential Gain Error (NTSC) G = +2, R
L
= 150 Ω to 2.5 V 0.05 %
Differential Phase Error (NTSC) G = +2, R
L
= 150 Ω to 2.5 V 0.25 Degrees
All-Hostile Crosstalk f = 5 MHz, G = +2, V
O
= 2 V p-p −80 dB
DC PERFORMANCE
Input Offset Voltage ±2.5 ±10 mV
ADA4891-1W/ADA4891-2W/ADA4891-4W only,
T
MIN
to T
MAX
±3.1 ±16 mV
T
MIN
to T
MAX
±3.1 mV
Offset Drift 6 µV/°C
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 2.5 V 77 83 dB
ADA4891-1W/ADA4891-2W/ADA4891-4W only,
T
MIN
to T
MAX
, R
L
= 1 kΩ to 2.5 V
66 dB
R
L
= 150 Ω to 2.5 V 71 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 3.0 V 88 dB
OUTPUT CHARACTERISTICS
Output Voltage Swing R
L
= 1 kΩ to 2.5 V 0.01 to 4.98 V
R
L
= 150 Ω to 2.5 V 0.08 to 4.90 V
Output Current 1% THD with 1 MHz, V
O
= 2 V p-p 125 mA