ADA4896-2 AD [Analog Devices], ADA4896-2 Datasheet - Page 21

• Manufacturer Part Number: ADA4896-2
• Description: 1 nV/?Hz, Low Power, Rail-to-Rail Output Amplifiers
• Manufacturer: AD [Analog Devices]

APPLICATIONS INFORMATION
TYPICAL PERFORMANCE VALUES
To reduce design time and eliminate uncertainty, Table 10
provides a convenient reference for typical gains, component
values, and performance parameters. The supply voltage used
is 5 V. The bandwidth is obtained with a small signal output
of 200 mV p-p, and the slew rate is obtained with a 2 V
output step. Note that as the gain increases, the small-signal
bandwidth decreases, as is expected from the gain bandwidth
product relationship. In addition, the phase margin improves
with higher gains, and the amplifier becomes more stable. As
a result, the peaking in the frequency response is reduced (see
Figure 49).
Table 10. Recommended Values and Typical Performance
Gain
+1
+2
+5
+10
+20
R
0
249
249
249
249
F
(Ω)
R
N/A
249
61.9
27.4
13.0
G
(Ω)
−3 dB BW
(MHz)
92
54
30
17
9
Slew Rate
(t
78/158
101/140
119/137
87/88
37/37
R
/t
F
) (V/μs)
Rev. 0 | Page 21 of 28
Peaking
(dB)
0.8
1.2
0
0
0
Output Voltage Noise
Only (nV/√Hz)
1
2
5
10
20
–1
–2
–3
–4
–5
–6
Figure 49. Small Signal Frequency Response at Various Gains
2
1
0
100k
V
V
R
R
S
OUT
F
L
= +5V
= 249Ω
= 1kΩ
= 200mV p-p
1M
G = +10
FREQUENCY (Hz)
G = +20
ADA4896-2/ADA4897-1
Total Output Noise
Including Resistors (nV/√Hz)
1.0
3.6
6.8
12.0
21.1
10M
G = +5
100M
G = +2
G = +1
500M