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參數(shù)資料
| 型號(hào)： | LT6350IMS8#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 4/28頁 |
| 文件大小： | 0K |
| 描述： | IC DIFF CONVERT/ADC DRIVER 8MSOP |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 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： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-MSOP |
| 包裝： | 管件 |
| 配用： | DC1783A-H-ND - BOARD SAR ADC LTC2376-18 DC1783A-G-ND - BOARD SAR ADC LTC2377-18 DC1783A-F-ND - BOARD SAR ADC LTC2378-18 DC1783A-E-ND - BOARD SAR ADC LTC2379-18 DC1783A-D-ND - BOARD SAR ADC LTC2376-16 DC1783A-C-ND - BOARD SAR ADC LTC2377-16 DC1783A-B-ND - BOARD SAR ADC LTC2378-16 DC1783A-A-ND - BOARD SAR ADC LTC2380-16 DC1500A-C-ND - BOARD SAR ADC LTC2391-16 DC1500A-B-ND - BOARD SAR ADC LTC2392-16 |
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LT6350
12
6350fc
For more information www.linear.com/LT6350
operaTion
The LT6350 is a low noise single-ended to differential
converter/ADCdriver.Itconvertsahighorlowimpedance,
single-ended input signal to a low impedance, balanced
differential output suitable for driving high performance
differentialsucessiveapproximationregister(SAR)ADCs.
Theclosedloop–3dBbandwidthforthetypicalgain-of-two
configuration is 33MHz.
The LT6350 uses a two op amp topology as shown in
the Block Diagram: at the input is one fully uncommitted
op amp with both inputs and output brought out to pins.
This is followed by an op amp internally hardwired and
optimally compensated as a unity-gain inverter with its
input connected to the output of the first op amp. The
noninvertinginputoftheinvertingopampisbroughtoutto
a pin and is used to set the output common mode voltage
level. The outputs of the two op amps are therefore 180°
out-of-phase and provide a low impedance differential
drive for differential-input analog to digital converters.
The outputs of the LT6350 can swing rail-to-rail and can
source or sink a transient 45mA of current. The outputs
are designed to drive 40pF to ground or 20pF differentially.
Load capacitances larger than 40pF should be decoupled
from each output with at least 25Ω of series resistance.
The LT6350 features very low noise op amps to support
signal-to-noise ratios >110dB.
BASIC CONNECTIONS
A typical use of the LT6350 is to convert a high impedance,
single-ended input signal into a low impedance differential
output. The configuration for such an application is shown
in Figure 2. Here, the input op amp is wired as a non-
inverting buffer with a high input impedance at +IN1. At
the outputs, VOUT1 follows the input, and VOUT2 provides
an inverted copy of VOUT1 for an overall differential gain
of two. The input op amp has a rail-to-rail input stage, and
both outputs are rail-to-rail, typically swinging to within
55mV of the rails at each output in this configuration
allowing 8VP-P differential outputs from a single 5V rail.
This provides a simple interface to differential input ADCs
that accept a mid-rail input common mode voltage.
+–
+
–
+IN1
–IN1
V+
V–
OUT2
OUT1
SHDN
+IN2
0.5V
5V
4.5V
0.1F
2.5V
LT6350
6350 F02
+
–
VOUT1
VIN
0.5V-4.5V
VOUT2
0.5V
4.5V
0.5V
4.5V
Figure 2. Basic Connections
DESIGN EQUATIONS AND ALTERNATIVE CONNECTIONS
Because the input op amp presents its output and both
its inputs to LT6350 pins, alternative configurations are
possible. Consider the general configuration shown in
Figure 3.
Ordinary op amp analysis gives the equations for VOUT1
and VOUT2 given the input voltages V1, V2, VIN and VA:
VOUT1 = VIN (1+RF/RG) – V1 (RF/RG)
VOUT1 = VA (1+RF/RG) + V1
VOUT2 = –VOUT1 + 2 V2
If we define the differential and common mode output
voltages as:
VOUTDIFF ≡ VOUT1 – VOUT2
and
VOUTCM ≡ (VOUT1 + VOUT2)/2,
then combining the expressions for VOUT1 and VOUT2 with
the definitions gives the resulting differential and common
mode output voltages:
VOUTDIFF = 2 (VIN(1+RF/RG)–V1(RF/RG)–V2) (1)
VOUTDIFF = 2 (VA (1+RF/RG) + V1 – V2)
(2)
VOUTCM = V2
(3)
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| LTC6360HMS8E#TRPBF | IC ADC DRIVER TRUE ZERO 8MSOP |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT6350IMS8TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Low Noise Single-Ended to Differential Converter/ADC Driver |
| LT6360 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:18-Bit, 1.6Msps, Pseudo-Differential Unipolar SAR |
| LT63H-SERIES | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Optoelectronic |
| LT63HXX-SERIES | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Optoelectronic |
| LT6402-12 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.3GHz Low Noise, Low Distortion Differential ADC Driver for 140MHz IF |
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