Datasheet 搜索 > 放大器、缓冲器 > ADI（亚德诺） > AD8210YRZ 数据手册 > AD8210YRZ 开发手册 6/8 页
器件3D模型￥ 28.271
AD8210YRZ 开发手册 - ADI（亚德诺）
制造商:
ADI（亚德诺）
分类:
放大器、缓冲器
封装:
SOIC-8
描述:
Analog Devices
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
AD8210YRZ数据手册
Page:
of 8 Go
若手册格式错乱，请下载阅览PDF原文件
–6–
AN-669
–7–
Operating the AD628 at a Precision Gain of +1
Figure 8 shows the AD628 connected to provide a preci-
sion gain of +1. As before, this connection uses the gain
block’s internal resistor networks for high gain accuracy
and stability.
The input signal is applied between the V
REF
pin and
ground. As Pins 1 and 8 are grounded, the input signal
runs through a 100 k /110 k input attenuator to the
plus input of A1. The voltage equals V
IN
(10/11) = 0.909 V
IN
.
The gain from this point to the output of A1 will equal
1 + (10 k /100 k) = 1.10. Therefore, the voltage at the
output of A1 will equal V
IN
(1.10) (0.909) = 1.00. Amplier
A2 is operated as a unity gain buffer (as Pins 5 and 6 tied
together), providing an overall circuit gain of +1.
Increased BW Gain Block of –9.91 Using Feed Forward
The circuit of Figure 6 can be modied slightly by apply-
ing a small amount of positive feedback to increase its
bandwidth, as shown in Figure 9. The output of amplier
A1 feeds back its positive input by connecting Pins 4 and
1 together. Now, Gain = –(10 – 1/11)= –9.91
The resulting circuit is still stable because of the large
amount of negative feedback applied around the entire
circuit (from the output of A2 back to the negative input
of A1). This connection actually results in a small signal
–3 dB bandwidth of approximately 140 kHz. This is a 27%
increase in bandwidth over the unmodied circuit in
Figure 6. However, gain accuracy is reduced to ±2%.
IN
IN
–V
S
A2
V
OUT
A1
100k
10k
10k
–15V
0.1F
100k
V
REF
V
IN
R
G
C
FILTER
AD628
8
1
2 3 6
4
7
5
+
–
IN
IN
–
+
+15V
0.1F
+V
S
10k
Figure 8. AD628 Precision Gain of +1
IN
IN
–V
S
A2
V
OUT
A1
100k
10k
10k
100k
V
REF
V
IN
R
G
C
FILTER
AD628
8
1
2 3 6
4
7
5
+
–
IN
IN
–
+
+V
S
10k
Figure 9. Precision –10 Gain Block with Feed Forward
REV. 0
器件 Datasheet 文档搜索
AiEMA 数据库涵盖高达 72,405,303 个元件的数据手册，每天更新 5,000 多个 PDF 文件
