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參數(shù)資料
| 型號： | LTC6401IUD-8#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC DRIVER DIFF 16-QFN |
| 標準包裝： | 121 |
| 類型： | ADC 驅(qū)動器 |
| 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 |
| 供應(yīng)商設(shè)備封裝： | 16-QFN-EP（3x3） |
| 包裝： | 管件 |
LTC6401-8
11
64018f
FREQUENCY (MHz)
0
IMD3
(dBc)
–40
–90
–80
–70
–60
–50
–100
–110
20 40 60 80 100 120 140 160 180
64018 F08
200
SINGLE-ENDED INPUT
FS = 122.8Msps
DRIVER VOUT = 2VP-P COMPOSITE
Figure 6. LTC6401-8 Modied 165MHz for Bandpass Filtering
(Three External Capacitors, One External Inductor)
only a few components as shown in Figure 6. Three
39pF capacitors and a 16nH inductor create a bandpass
lter with 165MHz center frequency, –3dB frequencies at
138MHz and 200MHz.
Figure 7. Single-Ended Input to LTC6401-8 and LTC2208
Figure 8. IMD3 for the Combination of LTC6401-8 and LTC2208
Output Common Mode Adjustment
The LTC6401-8’s output common mode voltage is set
by the VOCM pin, which is a high impedance input. The
output common mode voltage is capable of tracking VOCM
in a range from 1V to 1.6V. Bandwidth of VOCM control is
typically 14MHz, which is dominated by a low pass lter
connected to the VOCM pin and is aimed to reduce com-
mon mode noise generation at the outputs. The internal
common mode feedback loop has a –3dB bandwidth
around 400MHz, allowing fast rejection of any common
mode output voltage disturbance. The VOCM pin should
be tied to a DC bias voltage with a 0.1μF bypass capaci-
tor. When interfacing with 3V A/D converters such as the
LT22xx families, the VOCM pin can be connected to the
VCM pin of the ADC.
Driving A/D Converters
The LTC6401-8 has been specically designed to interface
directly with high speed A/D converters. Figure 7 shows the
LTC6401-8 with single-ended input driving the LTC2208,
which is a 16-bit, 130Msps ADC. Two external 5Ω resistors
help eliminate potential resonance associated with bond
wires of either the ADC input or the driver output. VOCM
of the LTC6401-8 is connected to VCM of the LTC2208 at
1.25V. Alternatively, an input single-ended signal can be
converted to differential signal via a balun and fed to the
input of the LTC6401-8.
Figure 8 summarizes the IMD3 performance of the whole
system as shown in Figure 7.
APPLICATIONS INFORMATION
64018 F06
IN+
OUT–
IN–
OUT+
200
Ω
12.5
Ω
500
Ω
LTC6401-8
LTC2208
200
Ω
500
Ω
12.5
Ω
10
Ω
10
Ω
4.99
Ω
4.99
Ω
50
Ω
50
Ω
13
14
15
16
7
5
6
8
39pF
16nH
39pF
+OUT
+OUTF
–OUTF
–OUT
+IN
–IN
1.7pF
39pF
27.4
Ω
59.0
Ω
0.1
μF
0.1
μF
64018 F07
LTC6401-8
VOCM
ENABLE
LTC2208
4.99
Ω
0.1
μF
LTC2208 130Msps
16-Bit ADC
1.25V
4.99
Ω
8dB GAIN
+OUT
+OUTF
–OUTF
–OUT
AIN–
AIN+
VCM
–IN
+IN
IF IN
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| LTC6403CUD-1#PBF | 功能描述:IC AMP/DRIVER LN LP 16-QFN RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:60 系列:- 類型:可變增益放大器 應(yīng)用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-TQFN-EP（5x5） 包裝:托盤 |
| LTC6403CUD-1#TRPBF | 功能描述:IC AMP/DRIVER LN LP 16-QFN RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:60 系列:- 類型:可變增益放大器 應(yīng)用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-TQFN-EP（5x5） 包裝:托盤 |
| LTC6403CUD-1-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:200MHz, Low Noise, Low Power Fully Differential Input/Output Amplifi er/Driver |
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