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| 型号： | AD8251ARMZ-R7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 10/24页 |
| 文件大小： | 0K |
| 描述： | IC AMP INST ICMOS LDRIFT 10MSOP |
| 标准包装： | 1 |
| 系列： | iCMOS® |
| 放大器类型： | 仪表 |
| 电路数： | 1 |
| 转换速率： | 30 V/µs |
| -3db带宽： | 10MHz |
| 电流 - 输入偏压： | 5nA |
| 电压 - 输入偏移： | 70µV |
| 电流 - 电源： | 4.1mA |
| 电流 - 输出 / 通道： | 37mA |
| 电压 - 电源，单路/双路(±)： | 10 V ~ 30 V，±5 V ~ 15 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 标准包装 |
| 产品目录页面： | 771 (CN2011-ZH PDF) |
| 其它名称： | AD8251ARMZ-R7DKR |
AD8251
Rev. B | Page 18 of 24
POWER SUPPLY REGULATION AND BYPASSING
The AD8251 has high PSRR. However, for optimal performance,
a stable dc voltage should be used to power the instrumentation
amplifier. Noise on the supply pins can adversely affect per-
formance. As in all linear circuits, bypass capacitors must be
used to decouple the amplifier.
Place a 0.1 μF capacitor close to each supply pin. A 10 μF tantalum
capacitor can be used farther away from the part (see Figure 55)
and, in most cases, it can be shared by other precision integrated
circuits.
AD8251
+VS
+IN
–IN
LOAD
REF
0.1F
10F
0.1F
10F
–VS
DGND
OUT
DGND
A0
A1
WR
06
28
7-
0
54
Figure 55. Supply Decoupling, REF, and Output Referred to Ground
INPUT BIAS CURRENT RETURN PATH
The AD8251 input bias current must have a return path to its
local analog ground. When the source, such as a thermocouple,
cannot provide a return current path, one should be created
(see Figure 56).
THERMOCOUPLE
+VS
REF
–VS
AD8251
CAPACITIVELY COUPLED
+VS
REF
C
–VS
AD8251
TRANSFORMER
+VS
REF
–VS
AD8251
INCORRECT
CAPACITIVELY COUPLED
+VS
REF
C
R
C
–VS
AD8251
1
fHIGH-PASS =
2
πRC
THERMOCOUPLE
+VS
REF
–VS
10M
AD8251
TRANSFORMER
+VS
REF
–VS
AD8251
CORRECT
06
28
7-
05
5
Figure 56. Creating an IBIAS Return Path
INPUT PROTECTION
All terminals of the AD8251 are protected against ESD. Note
that 2.2 kΩ series resistors precede the ESD diodes as shown in
Figure 51. The resistors limit current into the diodes and allow
for dc overload conditions 13 V above the positive supply and
13 V below the negative supply. An external resistor should be
used in series with each input to limit current for voltages
greater than 13 V beyond either supply rail. In either scenario,
the AD8251 safely handles a continuous 6 mA current at room
temperature. For applications where the AD8251 encounters
extreme overload voltages, external series resistors and low
leakage diode clamps, such as BAV199Ls, FJH1100s, or SP720s,
should be used.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8251ARMZ-RL | 功能描述:IC AMP INST ICMOS LDRIFT 10MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:iCMOS® 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 |
| AD8251ARZ | 制造商:AD 制造商全称:Analog Devices 功能描述:12MHz 20V/us G=1,2,4,8 Programmable Gain iCMOS Instrumentation Amplifier |
| AD8251ARZ-R7 | 制造商:AD 制造商全称:Analog Devices 功能描述:12MHz 20V/us G=1,2,4,8 Programmable Gain iCMOS Instrumentation Amplifier |
| AD8251ARZ-RL | 制造商:AD 制造商全称:Analog Devices 功能描述:12MHz 20V/us G=1,2,4,8 Programmable Gain iCMOS Instrumentation Amplifier |
| AD8251-EVAL | 制造商:AD 制造商全称:Analog Devices 功能描述:12MHz 20V/us G=1,2,4,8 Programmable Gain iCMOS Instrumentation Amplifier |
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