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參數(shù)資料
| 型號： | LTC6401CUD-20#TRPBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 4/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC DRIVER DIFF 16-QFN |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 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： | 帶卷 (TR) |
LTC6401-20
12
640120f
Output Common Mode Adjustment
The LTC6401-20’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 15MHz, 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 300MHz, allowing fast common mode rejection at
the outputs of the LTC6401-20. The VOCM pin should be
tied to a DC bias voltage where a 0.1μF bypass capacitor
is recommended. When interfacing with A/D converters
such as the LT22xx families, the VOCM can be normally
connected to the VCM pin of the ADC.
Driving A/D Converters
The LTC6401-20 has been specically designed to inter-
face directly with high speed A/D converters. In Figure 7,
an example schematic shows the LTC6401-20 with a
single-ended input driving the LTC2208, which is a 16-bit,
130Msps ADC. Two external 10Ω resistors help eliminate
potential resonance associated with stray capacitance of
PCB traces and bond wire inductance of either the ADC
input or the driver output. VOCM of the LTC6401-20 is
connected to VCM of the LTC2208 at 1.25V. Alternatively,
a single-ended input signal can be converted to differential
signal via a balun and fed to the input of the LTC6401-20.
The balun also converts input impedance to match 50Ω
source impedance.
Figure 7. Single-Ended Input to LTC6401-20 and LTC2208
APPLICATIONS INFORMATION
29
Ω
66.5
Ω
0.1
μF
640120 F07
LTC6401-20
VOCM
ENABLE
IF IN
LTC2208
10
Ω
0.1
μF
LTC2208 130Msps
16-Bit ADC
1.25V
10
Ω
20dB GAIN
AIN+
AIN–
VCM
–IN
+IN
+OUT
+OUTF
–OUTF
–OUT
Test Circuits
Due to the fully-differential design of the LTC6401 and
its usefulness in applications with differing characteristic
specications, two test circuits are used to generate the
information in this datasheet. Test Circuit A is DC987B,
a two-port demonstration circuit for the LTC6401 family.
The schematic and silkscreen are shown below. This
circuit includes input and output transformers (baluns)
for single-ended-to-differential conversion and imped-
ance transformation, allowing direct hook-up to a 2-port
network analyzer. There are also series resistors at the
output to present the LTC6401 with a 375Ω differential
load, optimizing distortion performance. Due to the input
and output transformers, the –3dB bandwidth is reduced
from 1.3GHz to approximately 1.1GHz.
Test Circuit B uses a 4-port network analyzer to measure
S-parameters and gain/phase response. This removes the
effects of the wideband baluns and associated circuitry,
for a true picture of the >1GHz S-parameters and AC
characteristics.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC6401CUD-26#PBF | 功能描述:IC ADC 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 |
| LTC6401CUD-26#TR | 制造商:Linear Technology 功能描述:SP Amp DIFF AMP Single 3.5V 16-Pin QFN EP T/R |
| LTC6401CUD-26#TRPBF | 功能描述:IC ADC 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 |
| LTC6401CUD-26-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.6GHz Low Noise, Low Distortion Differential ADC Driver for DC-140MHz |
| LTC6401CUD-26-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.6GHz Low Noise, Low Distortion Differential ADC Driver for DC-140MHz |
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