- 您现在的位置：买卖IC网 > PDF目录16905 > ISL28272INEVAL1Z (Intersil)EVALUATION BOARD FOR ISL28272 PDF资料下载
参数资料
| 型号： | ISL28272INEVAL1Z |
| 厂商： | Intersil |
| 文件页数： | 4/14页 |
| 文件大小： | 0K |
| 描述： | EVALUATION BOARD FOR ISL28272 |
| 标准包装： | 1 |
| 每 IC 通道数： | 2 - 双 |
| 放大器类型： | 仪表 |
| 输出类型： | 单端，满摆幅 |
| 转换速率： | 0.5 V/µs |
| -3db带宽： | 100kHz |
| 电流 - 输出 / 通道： | 31mA |
| 工作温度： | -40°C ~ 125°C |
| 电流供应（主 IC）： | 120µA |
| 电压 - 电源，单路/双路(±)： | 2.4 V ~ 5.5 V，±1.2 V ~ 2.75 V |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | ISL28272 |
12
FN6390.2
August 17, 2007
.
The FB+ pin is used as a REF terminal to center or to adjust
the output. Because the FB+ pin is a high impedance input,
an economical resistor divider can be used to set the voltage
at the REF terminal without degrading or affecting the CMRR
performance. Any voltage applied to the REF terminal will
shift VOUT by VREF times the closed loop gain, which is set
The FB+ pin can also be connected to the other end of
the in-amp maintains constant differential voltage across the
input terminals and feedback terminals (FB- - FB+) =
(IN+ - IN-), the transfer function of Figure 39 can be derived.
A finite resistance RS in series with the VREF source, adds
an output offset of VIN*(RS/RG). As the series resistance RS
Figure 39. VOUT is simply shifted by an amount VREF.
External Resistor Mismatches
Because of the independent pair of feedback terminals
provided by the in-amps, the CMRR is not degraded by any
resistor mismatches. Hence, unlike a three op amp and
especially a two op amp in-amp realization, the ISL28271
and ISL28272 reduce the cost of external components by
allowing the use of 1% or more tolerance resistors without
sacrificing CMRR performance. The CMRR will be typically
110dB regardless of the tolerance of the resistors used.
Instead, a resistor mismatch results in a higher deviation
from the theoretical gain - Gain Error.
Gain Error and Accuracy
The gain error indicated in the “Electrical Specifications”
table on page 2 is the inherent gain error alone. The gain
error specification listed does not include the gain error
contributed by the resistors. There is an additional gain error
due to the tolerance of the resistors used. The resulting non-
ideal transfer function effectively becomes:
Where:
ERG = Tolerance of RG
ERF = Tolerance of RF
EG = Gain Error of the ISL28271
The term [1 - (ERG +ERF +EG)] is the deviation from the
theoretical gain. Thus, (ERG +ERF +EG) is the total gain
error. For example, if 1% resistors are used, the total gain
error would be:
Disable/Power-Down
The ISL28271 and ISL28272 have an enable/disable pin for
each channel. They can be powered down to reduce the
supply current to typically 4A when all channels are off.
When disabled, the corresponding output is in a high
impedance state. The active low EN pin has an internal pull
down and hence can be left floating and the in-amp enabled
by default. When the EN is connected to an external logic,
the in-amp will shutdown when EN pin is pulled above 2V,
and will power up when EN bar is pulled below 0.8V.
FIGURE 38. GAIN SETTING AND REFERENCE CONNECTION
+
-
+
-
IN+
IN-
FB+
FB-
V+
V-
EN
2.4V TO 5.5V
RF
RG
VOUT
EN
ISL28271
VCM
IN+
IN-
REF
2.9V to 5.5V
R1
R2
ISL28271
ISL28272
VIN
IN+
IN-
–
=
(EQ. 2)
VOUT
1
R
F
R
G
--------
+
VIN
()
1
R
F
R
G
--------
+
VREF
()
+
=
FIGURE 39. REFERENCE CONNECTION WITH AN AVAILABLE
VREF
+
-
+
-
IN+
IN-
FB+
FB-
V+
V-
EN
2.4V TO 5.5V
RF
RG
VOUT
EN
ISL28271
VCM
IN+
IN-
VREF
RS
ISL28271
ISL28272
VIN
IN+
IN-
–
=
(EQ. 3)
VOUT
1
R
S
R
F
+
R
G
----------------------
+
VREF
+
=
(EQ. 4)
VOUT
1
R
F
R
G
--------
+
VIN
()
VREF
()
+
=
VOUT
1
R
F
R
G
--------
+
1E
RG
E
RF
E
G
++
()
±
[] VIN
×
=
(EQ. 5)
TotalGainError
E
RG
E
RF
E
G typical
()
++
()
±
=
TotalGainError
0.01
0.005
++
()
2.5%
±
=
±
=
ISL28271, ISL28272
相关PDF资料 |
PDF描述 |
|---|---|
| 3186GF472M400MPC1 | CAP ALUM 4700UF 400V 20% SCREW |
| 0982660151 | CBL 14POS 0.5MM JMPR TYPE A 7" |
| MIC2537-2BM | IC USB SWITCH QUAD 16-SOIC |
| 5-1589777-1 | WDUALOBE CONNECTOR |
| ESC06DTEN | CONN EDGECARD 12POS .100 EYELET |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL28273 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Dual and Quad Channel Micropower, Single Supply, Rail-to-Rail Input and Output (RRIO) Instrumentation Amplifiers |
| ISL28273FAZ | 功能描述:IC OPAMP DUAL RRIO MCPWR 16-QSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:75 系列:MicroAmplifier™ 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:0.03 V/µs 增益带宽积:100kHz -3db带宽:- 电流 - 输入偏压:1pA 电压 - 输入偏移:60µV 电流 - 电源:20µA 电流 - 输出 / 通道:5mA 电压 - 电源，单路/双路(±):2.3 V ~ 5.5 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-SOIC 包装:管件 |
| ISL28273FAZ-T7 | 功能描述:IC OPAMP DUAL RRIO MCPWR 16-QSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:100 系列:- 放大器类型:通用 电路数:1 输出类型:- 转换速率:0.2 V/µs 增益带宽积:- -3db带宽:- 电流 - 输入偏压:100pA 电压 - 输入偏移:30µV 电流 - 电源:380µA 电流 - 输出 / 通道:- 电压 - 电源，单路/双路(±):±2 V ~ 18 V 工作温度:0°C ~ 70°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 |
| ISL28273INEVAL1Z | 功能描述:EVALUATION BOARD FOR ISL28273 RoHS:是 类别:编程器，开发系统 >> 评估板 - 运算放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
| ISL28274 | 制造商:INTERSIL 制造商全称:Intersil Corporation 功能描述:Micropower, Single Supply, Rail-to-Rail Input-Output Instrumentation Amplifier and Precision Operational Amplifier |
发布紧急采购，3分钟左右您将得到回复。