參數(shù)資料
型號: ADA4897-1AR-EBZ
廠商: Analog Devices Inc
文件頁數(shù): 14/29頁
文件大?。?/td> 0K
描述: BOARD EVAL FOR ADA4897 SOIC
標準包裝: 1
每 IC 通道數(shù): 1 - 單
放大器類型: 電壓反饋
板類型: 裸(未填充)
已供物品:
已用 IC / 零件: 8-SOIC 封裝
ADA4896-2/ADA4897-1/ADA4897-2
Data Sheet
Rev.
| Page 20 of 28
APPLICATIONS INFORMATION
TYPICAL PERFORMANCE VALUES
To reduce design time and eliminate uncertainty, Table 13
provides a reference for typical gains, component values, and
performance parameters. The supply voltage used is 5 V. The band-
width 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 51).
2
FREQUENCY (MHz)
0.1
1
10
100
500
1
0
–1
–2
–3
–4
–5
–6
VS = +5V
VOUT = 200mV p-p
RF = 249
RL = 1k
G = +20
09
44
7-
0
2
0
G = +10
G = +5
G = +2
G = +1
NO
RM
AL
IZ
E
D
CL
O
S
E
D-
L
O
P
G
A
IN
(
d
B)
Figure 51. Small Signal Frequency Response at Various Gains
Table 13. Recommended Values and Typical Performance
Gain
RF (Ω)
RG (Ω)
3 dB BW (MHz)
Slew Rate, tR/tF (V/μs)
Peaking (dB)
Total Output Noise Including
Resistors (nV/√Hz)
+1
0
N/A
92
78/158
0.8
1.0
+2
249
54
101/140
1.2
3.6
+5
249
61.9
30
119/137
0
6.8
+10
249
27.4
17
87/88
0
12.0
+20
249
13.0
9
37/37
0
21.1
B
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