参数资料
型号: OP97FSZ
厂商: Analog Devices Inc
文件页数: 6/16页
文件大小: 0K
描述: IC OPAMP GP LP PREC 8SOIC
标准包装: 98
放大器类型: 通用
电路数: 1
转换速率: 0.2 V/µs
-3db带宽: 900kHz
电流 - 输入偏压: 30pA
电压 - 输入偏移: 30µV
电流 - 电源: 380µA
电压 - 电源,单路/双路(±): ±2 V ~ 20 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SO
包装: 管件
产品目录页面: 773 (CN2011-ZH PDF)
OP97
Rev. G | Page 14 of 16
The digitally programmable gain amplifier shown in Figure 38
has 12-bit gain resolution with 10-bit gain linearity over the
range of 1 to 1024. The low bias current of the OP97 main-
tains this linearity, while C1 limits the noise voltage bandwidth,
allowing accurate measurement down to microvolt levels.
Table 5
.
DIGITAL IN
GAIN (Av)
4095
1.00024
2048
2
1024
4
512
8
256
16
128
32
64
32
128
16
256
8
512
4
1024
2
2048
1
4096
0
Open Loop
Many high speed amplifiers suffer from less-than-perfect low
frequency performance. A combination amplifier consisting of
a high precision, slow device like the OP97 and a faster device such
as the AD8610 results in uniformly accurate performance from
dc to the high frequency limit of the AD8610, which has a gain-
bandwidth product of 25 MHz. The circuit shown in Figure 39
accomplishes this, with the AD8610 providing high frequency
amplification and the OP97 operating on low frequency signals
and providing offset correction. Offset voltage and drift of the
circuit are controlled by the OP97.
00
29
9-
0
38
VOUT
2
3
6
AD7541A
IOUT2
IOUT1
RFB
VREF
18
1
2
3
17
16
+15V
–15V
0.1F
C1
220pF
VIN
±2.5mV TO ±10V
RANGE DEPENDING
ON GAIN SETTING
+15V
OP97
0.1F
Figure 38. Precision Programmable Gain Amplifier
00
29
9-
0
39
2
3
6
2
3
6
5pF
VOUT
AD8610
OP97
0.1F
10k
1F
R1
2k
R2
20k
VIN
5
AV = –
R2
R1
Figure 39. Combination High Speed, Precision Amplifier
00
29
9-
04
0
100
90
10
0%
1V
5V
2s
Figure 40. Combination Amplifier Transient Response
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