参数资料
| 型号： | AD8230YRZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 4/16页 |
| 文件大小： | 0K |
| 描述： | IC AMP CHOPPER R-R PREC 8SOIC |
| 标准包装： | 98 |
| 放大器类型： | 断路器（零漂移） |
| 电路数： | 1 |
| 输出类型： | 满摆幅 |
| 转换速率： | 2 V/µs |
| 电流 - 输入偏压： | 150pA |
| 电压 - 输入偏移： | 20µV |
| 电流 - 电源： | 3.2mA |
| 电流 - 输出 / 通道： | 15mA |
| 电压 - 电源，单路/双路(±)： | 8 V ~ 16 V，±4 V ~ 8 V |
| 工作温度： | -40°C ~ 125°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： | 771 (CN2011-ZH PDF) |
AD8230
Rev. B | Page 12 of 16
TEMPERATURE (°C)
150
–50
0
50
100
O
F
SET
VO
L
T
A
G
E
(
V
R
T
I)
0
–1
–2
–3
–4
–5
RF = 100k, RG = 1k
RF = 10k, RG = 100
05
06
3-
0
33
Figure 33. Effect of Feedback Resistor on Offset Voltage Drift
LEVEL-SHIFTING THE OUTPUT
A reference voltage, as shown in Figure 34, can be used to
level-shift the output. The reference voltage, VR, is limited to
VS + 3.5 V to +VS 2.5 V. (For G < 10, the reference voltage
range is limited to VS + 4.24 V to +VS – 2.75 V.) Otherwise, it
is nominally tied to midsupply. The voltage source used to level-
shift the output should have a low output impedance to avoid
contributing to gain error. In addition, it should be able to
source and sink current. To minimize offset voltage, the VREF
pins should be connected either to the local ground or to a
reference voltage source that is connected to the local ground.
2
6
1
7
5
8
4
3
AD8230
VOUT
–VS
+VS
0.1F
RG
RF
0.1F
VR
05
06
3-
0
34
Figure 34. Level-Shifting the Output
The output can also be level-shifted by adding a resistor, RO, as
shown in Figure 35. The benefit is that the output can be level-
shifted to as low as 100 mV of the negative supply rail and to as
high as 200 mV of the positive supply rail, increasing unipolar
output swing. This can be useful in applications, such as strain
gauges, where the force is only applied in one direction. Another
benefit of this configuration is that a supply rail can be used for
VR’ eliminating the need to add an additional external reference
voltage.
The gain changes with the inclusion of RO. The full expression is
()
'
R
O
F
IN
O
G
O
G
F
R'
O
F
IN
O
G
F
OUT
V
R
V
R
V
R
V
R
V
+
=
+
=
1
2
1
||
2
(3)
The following steps can be taken to set the gain and level-shift
the output:
2. Solve for RO using Equation 4.
LEVEL
DESIRED
F
R'
O
V
R
V
R
×
=
(4)
where:
VR’ is a voltage source, such as a supply voltage.
VDESIRED-LEVEL is the desired output bias voltage.
3. Solve for RG.
1
2
=
F
O
G
R
Gain
R
(5)
2
6
1
7
5
8
4
3
AD8230
VOUT
–VS
+VS
0.1F
RG
RF
RO
0.1F
VR'
0
50
63
-03
5
Figure 35. Level-Shifting the Output Without an
Additional Voltage Reference
2
6
1
7
5
8
4
3
AD8230
VOUT
–5V
+5V
0.1F
203
9.76k
10.2k
0.1F
+5V
0
50
63
-03
6
Figure 36. An AD8230 with its Output Biased at 4.8 V;
G = 100; VDESIRED-LEVEL = 4.8 V
SOURCE IMPEDANCE AND INPUT SETTLING TIME
The input stage of the AD8230 consists of two actively driven,
differential switched capacitors, as described in Figure 30 and
that the associated parasitic capacitances, 70 pF, are balanced
between the inputs to achieve high common-mode rejection.
On each sample period (approximately 85 μs), these parasitic
capacitances must be recharged to the common-mode voltage
by the signal source impedance (10 kΩ maximum). If resistors
and capacitors are used at the input of the AD8230, care should
be taken to maintain close match to maximize CMRR.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8230YRZ-REEL | 功能描述:IC AMP CHOPPER R-R PREC 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.028 V/µs 增益带宽积:105kHz -3db带宽:- 电流 - 输入偏压:3nA 电压 - 输入偏移:100µV 电流 - 电源:3.3µA 电流 - 输出 / 通道:12mA 电压 - 电源，单路/双路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:剪切带 (CT) 其它名称:OP481GRUZ-REELCT |
| AD8230YRZ-REEL7 | 功能描述:IC AMP CHOPPER R-R PREC 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.028 V/µs 增益带宽积:105kHz -3db带宽:- 电流 - 输入偏压:3nA 电压 - 输入偏移:100µV 电流 - 电源:3.3µA 电流 - 输出 / 通道:12mA 电压 - 电源，单路/双路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:剪切带 (CT) 其它名称:OP481GRUZ-REELCT |
| AD8231 | 制造商:AD 制造商全称:Analog Devices 功能描述:Low Noise, Low Gain Drift, G = 2000 Instrumentation Amplifier |
| AD8231_07 | 制造商:AD 制造商全称:Analog Devices 功能描述:Zero Drift, Digital Programmable Instrumentation Amplifier |
| AD8231_1 | 制造商:AD 制造商全称:Analog Devices 功能描述:Zero Drift, Digitally Programmable Instrumentation Amplifier |
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