ADA4891-4 Analog Devices, ADA4891-4 Datasheet - Page 11

• Manufacturer Part Number: ADA4891-4
• Description: Low Cost CMOS, High Speed, Rail-to-Rail Amplifier (Quad)
• Manufacturer: Analog Devices

Specifications of ADA4891-4

• -3db Bandwidth: 220MHz
• Slew Rate: 170V/µs
• Vos: 2.5mV
• Ib: 2pA
• # Opamps Per Pkg: 4
• Input Noise (nv/rthz): 9nV/rtHz
• Vcc-vee: 2.7V to 5.5V
• Isy Per Amplifier: 4.4A

Figure 31. Closed-Loop Output Impedance vs. Frequency, Part Enabled
–100
0.01
100
100
0.1
–1
10
1
0
1
0
0.01
Figure 33. Large-Signal Step Response, V
V
G = +1
50mV/DIV
0.5V/DIV
S
Figure 32. Small-Signal Step Response, G = +1
= 5V
R
L
= 1kΩ
0.1
R
V
L
V
S
= 150Ω
S
FREQUENCY (MHz)
= 3V
= 5V
1
10
S
G = +1
V
R
= 5 V, G = +1
OUT
L
= 1kΩ
V
G = +1
V
S
OUT
= 200mV p-p
= 5V
5ns/DIV
5ns/DIV
= 2V p-p
100
Rev. C | Page 11 of 24
ADA4891-1/ADA4891-2/ADA4891-3/ADA4891-4
Figure 34. Closed-Loop Output Impedance vs. Frequency, Part Disabled
100k
–0.5
–1.0
–1.5
10k
100
–0.5
1.5
1.0
0.5
1k
10
0.5
1
0.01
0
0
10
Figure 36. Large-Signal Step Response, V
R
V
G = +1
0.5V/DIV
L
Figure 35. Large-Signal Step Response, G = +2
S
V
R
= 150Ω
= 5V
S
R
V
L
20
= 5V
L
S
= 1kΩ
= 1kΩ
= 5V
0.1
30
R
V
R
L
(ADA4891-3 Only)
S
L
= 150Ω
FREQUENCY (MHz)
= 3V
= 1kΩ
40
V
R
TIME (ns)
1
S
L
= 3V
= 150Ω
50
60
10
S
= 3 V, G = +1
70
G = +2
V
V
G = +1
V
OUT
S
OUT
= 3V
5ns/DIV
= 2V p-p
80
= 1V p-p
100
90