参数资料
| 型号： | AD622ANZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 4/17页 |
| 文件大小： | 0K |
| 描述： | IC AMP INST LP 18MA 8DIP |
| 产品培训模块： | Instrumentation Amplifiers Performance |
| 标准包装： | 50 |
| 放大器类型： | 仪表 |
| 电路数： | 1 |
| 转换速率： | 1.2 V/µs |
| -3db带宽： | 1MHz |
| 电流 - 输入偏压： | 2nA |
| 电压 - 输入偏移： | 60µV |
| 电流 - 电源： | 900µA |
| 电流 - 输出 / 通道： | 18mA |
| 电压 - 电源，单路/双路(±)： | ±2.6 V ~ 18 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 8-PDIP |
| 包装： | 管件 |
| 产品目录页面： | 770 (CN2011-ZH PDF) |
Data Sheet
AD622
Rev. E | Page 11 of 16
GAIN SELECTION
The AD622 gain is resistor programmed by RG or, more
precisely, by whatever impedance appears between Pin 1 and
Pin 8. The AD622 is designed to offer gains as close as possible
to popular integer values using standard 1% resistors. Table 6
shows required values of RG for various gains. Note that for
G = 1, the RG pins are unconnected (RG = ∞). For any arbitrary
gain, RG can be calculated by using the formula
1
k
5
.
50
=
G
RG
To minimize gain error, avoid high parasitic resistance in series
with RG. To minimize gain drift, RG should have a low temperature
coefficient less than 10 ppm/°C for the best performance.
Table 6. Required Values of Gain Resistors
Desired
Gain
1% Std Table Value of RG, Ω
Calculated
Gain
2
51.1 k
1.988
5
12.7 k
4.976
10
5.62 k
9.986
20
2.67 k
19.91
33
1.58 k
32.96
40
1.3 k
39.85
50
1.02 k
50.50
65
787
65.17
100
511
99.83
200
255
199.0
500
102
496.1
1000
51.1
989.3
INPUT AND OUTPUT OFFSET VOLTAGE
The low errors of the AD622 are attributable to two sources:
input and output errors. The output error is divided by G when
referred to the input. In practice, the input errors dominate at
high gains and the output errors dominate at low gains. The
total VOS for a given gain is calculated as follows:
Total Error RTI = input error + (output error/G)
Total Error RTO = (input error × G) + output error
REFERENCE TERMINAL
The reference terminal potential defines the zero output voltage
and is especially useful when the load does not share a precise
ground with the rest of the system. The reference terminal provides
a direct means of injecting a precise offset to the output, with an
allowable range of 2 V within the supply voltages. Parasitic
resistance should be kept to a minimum for optimum CMR.
INPUT PROTECTION
The AD622 safely withstands an input current of ±60 mA for
several hours at room temperature. This is true for all gains and
power on and off, which is useful if the signal source and amplifier
are powered separately. For longer time periods, the input
current should not exceed 6 mA.
For input voltages beyond the supplies, a protection resistor should
be placed in series with each input to limit the current to 6 mA.
These can be the same resistors as those used in the RFI filter.
High values of resistance can impact the noise and AC CMRR
performance of the system. Low leakage diodes (such as the
BAV199) can be placed at the inputs to reduce the required
protection resistance.
00777-
023
AD622
R
REF
R
+SUPPLY
–SUPPLY
VOUT
+IN
–IN
Figure 18. Diode Protection for Voltages Beyond Supply
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| AD622AR | 功能描述:IC AMP INST LP 18MA 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:150 系列:- 放大器类型:音频 电路数:2 输出类型:- 转换速率:5 V/µs 增益带宽积:12MHz -3db带宽:- 电流 - 输入偏压:100nA 电压 - 输入偏移:500µV 电流 - 电源:6mA 电流 - 输出 / 通道:50mA 电压 - 电源，单路/双路(±):4 V ~ 32 V，±2 V ~ 16 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:8-TSSOP 包装:管件 |
| AD622AR-REEL | 功能描述:IC AMP INST LP 18MA 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:0.11 V/µs 增益带宽积:350kHz -3db带宽:- 电流 - 输入偏压:4nA 电压 - 输入偏移:20µV 电流 - 电源:260µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):2.7 V ~ 36 V，±1.35 V ~ 18 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:带卷 (TR) |
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