参数资料
| 型号： | LTC6404IUD-2#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/28页 |
| 文件大小： | 0K |
| 描述： | IC AMP/DRIVER DIFF 16-QFN |
| 标准包装： | 2,500 |
| 类型： | ADC 驱动器 |
| 应用： | 数据采集 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 供应商设备封装： | 16-QFN-EP（3x3） |
| 包装： | 带卷 (TR) |
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LTC6404
20
6404f
APPLICATIONS INFORMATION
if voltage transients at the input exceed 1.4V. The inputs
also have steering diodes to either supply. The turn-on and
turn-off time between the shutdown and active states is
typically less than 1μs.
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 (2.7V min), and will have an optimal
common mode input range near mid-supply. The LTC6404
makes interfacing to these ADCs easy, by providing both
single-ended to differential conversion as well as com-
mon mode level shifting. The front page of this data sheet
shows a typical application. Referring to Figure 1, the gain
to VOUTDIFF from VINM and VINP is:
VV
V
R
VV
OUTDIFF
OUT
F
I
INP
INM
=≈
()
+ –
–
Note from the above equation, the differential output volt-
age (VOUT+ – VOUT–) is completely independent of input
and output common mode voltages, or the voltage at
the common mode pin. This makes the LTC6404 ideally
suited for pre-amplication, level shifting and conversion
of single ended signals to differential output signals to
drive differential input ADCs.
Effects of Resistor Pair Mismatch
In the circuit of Figure 3, it is possible the gain setting
resistors will not perfectly match. Assuming innite open
loop gain, the differential output relationship is given by
the equation:
VV
V
R
V
OUTDIFF
OUT
F
I
INDIFF
AVG
I
=
+
Δ
+ –
–
β
N
NCM
AVG
OCM
V
–
Δβ
β
where:
βAVG
I
IF
I
IF
R
RR
R
RR
=
+
1
2
1
11
2
22
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 (or gain)
from the outputs to their respective inputs:
Δβ is dened as the difference in feedback factors:
Δ=
++
β
R
RR
R
RR
I
IF
I
IF
2
22
1
11
–
Figure 3. Basic Differential Amplier with Feedback Resistor Pair Mismatch
V–
V+
0.1μF
–
+
1
SHDN
5
6
IN–
7
OUT+
8
OUTF+
16
15
IN+
NC
14
OUT–
13
OUTF–
VOUTF
–
RF2
VOUTF
+
VOUT
–
VOUT
+
2
V+
3
V–
V+
V–
V+
V–
4
VOCM
VSHDN
VVOCM
VOCM
12
V–
11
V+
10
V+
9
V–
6404 F03
LTC6404
SHDN
0.1μF
0.01μF
RF1
RI2
RI1
+
–
VINP
–
+
VINM
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC6404IUD-4#PBF | 功能描述:IC AMP/DRIVER DIFF 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 |
| LTC6404IUD-4#TRPBF | 功能描述:IC AMP/DRIVER DIFF 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 |
| LTC6404IUD-4-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:600MHz, Low Noise, High Precision Fully Differential Input/Output Amplifi er/Driver |
| LTC6404IUD-4-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:600MHz, Low Noise, High Precision Fully Differential Input/Output Amplifi er/Driver |
| LTC6405 | 制造商:LINER 制造商全称:Linear Technology 功能描述:2.7GHz, 5V, Low Noise, Rail-to-Rail Input Differential Amplifi er/Driver |
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