参数资料
| 型号： | ADA4960-1ACPZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 7/20页 |
| 文件大小： | 0K |
| 描述： | IC ADC DRIVER DIFF 16LFCSP |
| 标准包装： | 5,000 |
| 类型： | ADC 驱动器 |
| 应用： | 数据采集 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 16-LFCSP-WQ（3x3） |
| 包装： | 带卷 (TR) |
ADA4960-1
Rev. 0 | Page 15 of 20
GAIN ADJUST
The gain of the ADA4960-1 is set with a single resistor, RG,
connected across the IIP and IIN pins. Because the output
impedance is 150 Ω, the load affects the gain. The voltage
gain can be calculated for both differential and single-ended
inputs as follows:
()
G
L
V
R
A
+
+
=
35.5
150
4.7
where RL and RG are the load and gain-setting resistors.
18
16
14
12
10
8
6
4
2
0
50
100
150
200
250
RG ()
RL = 1k
RL = 100
A
V
(
V
/V
)
08
45
8-
02
9
RL = 500
RL = 200
Figure 34. AV vs. RG for RL = 100 Ω, RL = 200 Ω, RL = 500 Ω, and RL = 1 kΩ
Table 5. AV vs. RG for RL = 100 Ω, RL = 200 Ω, RL = 500 Ω, and
RL = 1 kΩ
AV (dB)
RG
RL = 100 Ω
RL = 200 Ω
RL = 500 Ω
RL = 1 kΩ
0
246
370
505
576
6
106
167
237
271
12
35.2
65.7
101
118
18
0
15.2
32.8
41.7
BANDWIDTH EXTENSION
The bandwidth of the ADA4960-1 can be extended for both
differential and single-ended input configurations by connecting
a capacitor, CS, in parallel with the gain-setting resistor, RG, as
shown in Figure 35.
08
45
8-
02
7
IIP
VIP
R1
25
50
R2
25
0.1F
5V
ETC1-1-13
ADA4960-1
0.1F
AC
VOP
VON
IIN
VIN
RG
CS
RL
2
RL
2
Figure 35. ADA4960-1 with Bandwidth Extension
Figure 36 shows the bandwidth extension for 6 dB and 12 dB gains.
14
12
10
8
6
4
2
0
10
100
1k
10k
FREQUENCY (MHz)
A
V
(d
B
)
08
45
8-
0
31
CS = 2.2pF
CS = 0.1pF
Figure 36. Bandwidth Extension for 6 dB and 12 dB Gains
14
12
10
8
6
4
2
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
CS (pF)
A
V
(d
B
)
08
45
8-
03
2
Figure 37. Recommended CS Values for Most Gains
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