參數(shù)資料
型號(hào)： LTC6404CUD-1#PBF
廠商： Linear Technology
文件頁(yè)數(shù)： 13/28頁(yè)
文件大?。?/td> 0K
描述： IC AMP/DRIVER DIFF 16-QFN
標(biāo)準(zhǔn)包裝： 121
類型： ADC 驅(qū)動(dòng)器
應(yīng)用： 數(shù)據(jù)采集
安裝類型： 表面貼裝
封裝/外殼： 16-WFQFN 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 16-QFN-EP（3x3）
包裝： 管件
產(chǎn)品目錄頁(yè)面： 1323 (CN2011-ZH PDF)
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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參數(shù)描述
LTC6404CUD-1-TRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:600MHz, Low Noise, High Precision Fully Differential Input/Output Amplifi er/Driver
LTC6404CUD-2#PBF 功能描述:IC AMP/DRIVER DIFF 16-QFN RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:可變?cè)鲆娣糯笃?應(yīng)用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:20-TQFN-EP（5x5） 包裝:托盤(pán)
LTC6404CUD-2#TRPBF 功能描述:IC AMP/DRIVER DIFF 16-QFN RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:可變?cè)鲆娣糯笃?應(yīng)用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:20-TQFN-EP（5x5） 包裝:托盤(pán)
LTC6404CUD-2-PBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:600MHz, Low Noise, High Precision Fully Differential Input/Output Amplifi er/Driver
LTC6404CUD-2-TRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:600MHz, Low Noise, High Precision Fully Differential Input/Output Amplifi er/Driver
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