参数资料
| 型号： | LTC6406IMS8E#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/24页 |
| 文件大小： | 0K |
| 描述： | IC AMP/DRIVER DIFF 8-MSOP |
| 标准包装： | 50 |
| 类型： | ADC 驱动器 |
| 应用： | 数据采集 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 供应商设备封装： | 8-MSOP-EP |
| 包装： | 管件 |
LTC6406
14
6406fc
APPLICATIONS INFORMATION
General Amplier Applications
As levels of integration have increased and correspond-
ingly, system supply voltages decreased, there has been
a need for ADCs to process signals differentially in order
to maintain good signal to noise ratios. These ADCs are
typically supplied from a single supply voltage which can
be as low as 3V, and will have an optimal common mode
input range of 1.25V or 1.5V. The LTC6406 makes interfac-
ing to these ADCs easy, by providing both single-ended
to differential conversion as well as common mode level
shifting. The front page of this data sheet shows a typical
application. The gain to VOUTDIFF from VINM and VINP is:
V
OUTDIFF = V
+OUT –V–OUT ≈
R
F
R
I
V
INP –VINM
()
Note from the above equation, the differential output volt-
age (V+OUT – V–OUT) is completely independent of input
and output common mode voltages, or the voltage at
the common mode pin. This makes the LTC6406 ideally
suited for preamplication, level shifting and conversion
of single-ended signals to differential output signals in
preparation for driving differential input ADCs.
Effects of Resistor Pair Mismatch
Figure 3 shows a circuit diagram which takes into consid-
eration that real world resistors will not match perfectly.
Assuming innite open-loop gain, the differential output
relationship is given by the equation:
V
OUTDIFF = V
+OUT –V–OUT
R
F
R
I
V
INDIFF +
Δβ
β
AVG
V
ICM –
Δβ
β
AVG
V
OCM
where:
RF is the average of RF1, and RF2, and RI is the average
of RI1, and RI2.
βAVG is dened as the average feedback factor from the
outputs to their respective inputs:
β
AVG =
1
2
R
I1
R
I1 + RF1
+
R
I2
R
I2 + RF2
Δβ is dened as the difference in feedback factors:
Δβ =
R
I2
R
I2 + RF2
–
R
I1
R
I1 + RF1
VICM is dened as the average of the two input voltages
VINP, and VINM (also called the input common mode
voltage):
V
ICM =
1
2
V
INP + VINM
()
and VINDIFF is dened as the difference of the input voltages:
VINDIFF = VINP – VINM
VOCM is dened as the average of the two output voltages
V+OUT and V–OUT:
V
OCM =
V+OUT + V–OUT
2
When the feedback ratios mismatch (
Δβ), common mode
to differential conversion occurs.
Setting the differential input to zero (VINDIFF = 0), the de-
gree of common mode to differential conversion is given
by the equation:
V
OUTDIFF = V
+OUT –V–OUT ≈ VICM –VOCM
() Δβ
β
AVG
Figure 3. Real-World Application with Feedback Resistor
Pair Mismatch
–
+
RF2
V–OUT
V+OUT
VVOCM
VOCM
6406 F03
RF1
RI2
RI1
+
–
VINP
–
+
VINM
V–IN
V+IN
相关PDF资料 |
PDF描述 |
|---|---|
| VI-24H-MW-B1 | CONVERTER MOD DC/DC 52V 100W |
| VE-24L-IV-F3 | CONVERTER MOD DC/DC 28V 150W |
| VI-24F-MW-B1 | CONVERTER MOD DC/DC 72V 100W |
| AD8138AARMZ | IC DIFF ADC DVR LOW DISTOR 8MSOP |
| VE-24L-IV-F2 | CONVERTER MOD DC/DC 28V 150W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC6406IMS8E-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:3GHz, Low Noise, Rail-to-Rail Input Differential Amplifi er/Driver |
| LTC6406IUD#PBF | 功能描述:IC DIFF AMP/DRIVER R-R 16-QFN RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:60 系列:- 类型:可变增益放大器 应用:CATV 安装类型:表面贴装 封装/外壳:20-WQFN 裸露焊盘 供应商设备封装:20-TQFN-EP（5x5） 包装:托盘 |
| LTC6406IUD#TRPBF | 功能描述:IC DIFF AMP/DRIVER R-R 16-QFN RoHS:是 类别:集成电路 (IC) >> 线性 - 放大器 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:60 系列:- 类型:可变增益放大器 应用:CATV 安装类型:表面贴装 封装/外壳:20-WQFN 裸露焊盘 供应商设备封装:20-TQFN-EP（5x5） 包装:托盘 |
| LTC6406IUD-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:3GHz, Low Noise, Rail-to-Rail Input Differential Amplifi er/Driver |
| LTC6406IUD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:3GHz, Low Noise, Rail-to-Rail Input Differential Amplifi er/Driver |
发布紧急采购，3分钟左右您将得到回复。