參數(shù)資料
型號(hào)： AD8138SRMZ-EP-R7
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 16/25頁(yè)
文件大?。?/td> 0K
描述： IC ADC DRIVER DIFF 8MSOP
設(shè)計(jì)資源： DC-Coupled, Single-Ended-to-Differential Conversion Using AD8138 and AD7352 (CN0040)
DC-Coupled, Single-Ended-to-Differential Conversion Using AD8138 and AD7356 (CN0041)
DC-Coupled, Single-Ended-to-Differential Conversion Using AD8138 and AD7357 (CN0061)
標(biāo)準(zhǔn)包裝： 1
類(lèi)型： ADC 驅(qū)動(dòng)器
應(yīng)用： 數(shù)據(jù)采集
安裝類(lèi)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： 標(biāo)準(zhǔn)包裝
其它名稱(chēng)： AD8138SRMZ-EP-R7DKR
AD8138
Rev. F | Page 22 of 24
3 V OPERATION
The circuit in Figure 47 shows a simplified front-end
connection for an AD8138 driving an AD9203, a 10-bit,
40 MSPS ADC that is specified to work on a single 3 V supply.
The ADC works best when driven differentially to make the
best use of the signal swing available within the 3 V supply.
The appropriate outputs of the AD8138 are connected to the
appropriate differential inputs of the AD9203 via a low-pass filter.
The AD8138 is configured for unity gain for a single-ended
input to differential output. The additional 23 Ω at the input to
IN is to balance the impedance of the 50 Ω source and its 50 Ω
termination that drives the noninverting input.
The signal generator has ground-referenced, bipolar output,
that is, it can drive symmetrically above and below ground.
Even though the AD8138 has ground as its negative supply, it
can still function as a level-shifter with such an input signal.
The output common mode is raised up to midsupply by the
voltage divider that biases VOCM. In this way, the AD8138
provides dc coupling and level-shifting of a bipolar signal,
without inverting the input signal.
The low-pass filter between the AD8138 and the AD9203
provides filtering that helps to improve the signal-to-noise ratio
(SNR). Lower noise can be realized by lowering the pole
frequency, but the bandwidth of the circuit is lowered.
49.9
0.1F
10k
523
499
10k
20pF
49.9
20pF
499
0.1F
3V
DRVDD
AVDD
AINN
AINP
0.1F
3V
49.9
AD8138
+
AD9203
8
2
1
3
5
4
6
28
2
27
25
26
1
AVSS DRVSS
DIGITAL
OUTPUTS
0
107
3-
0
46
Figure 47. AD8138 Driving an AD9203, a 10-Bit, 40 MSPS A/D Converter
The circuit was tested with a 0.5 dBFS signal at various
frequencies. Figure 48 shows a plot of the total harmonic
distortion (THD) vs. frequency at signal amplitudes of 1 V and
2 V differential drive levels.
FREQUENCY (MHz)
–40
T
H
D
(
d
Bc)
–45
–50
–55
–60
–65
–70
–75
–80
AD8138–2V
AD8138–1V
0
5
10
15
20
25
01
07
3-
0
4
7
Figure 48. AD9203 THD @ 0.5 dBFS AD8138
Figure 49 shows the signal-to-noise-plus distortion (SINAD)
under the same conditions as above. For the smaller signal
swing, the AD8138 performance is quite good, but its
performance degrades when trying to swing too close to the
supply rails.
FREQUENCY (MHz)
65
S
INA
D
(
d
Bc)
63
61
59
57
55
53
51
45
49
47
AD8138–1V
AD8138–2V
0
5
10
15
20
25
01
07
3-
0
48
Figure 49. AD9203 SINAD @ 0.5 dBFS AD8138
相關(guān)PDF資料
PDF描述
LTC2610IGN#PBF IC DAC R-R 14-BIT OCTAL 16-SSOP
SY88893VKG TR IC POST AMP PECL LP LIMIT 10MSOP
LTC6405IMS8E#TRPBF IC AMP/DVR DIFF R-R 5V 8-MSOP
AD5044BRUZ-REEL7 IC DAC QUAD 14BIT SPI 16TSSOP
SY88973BLMG TR IC CML POST AMP 3.2GBPS 16-MLF
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD8139 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:Low Noise, Rail-to-Rail, Differential ADC Driver
AD8139_07 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:Low Noise, Rail-to-Rail, Differential ADC Driver
AD8139ACP 制造商:Analog Devices 功能描述:ULTRA LOW NOISE FULLY DIFFERENTIAL ADC DRIVER - Bulk
AD8139ACP-EBZ 功能描述:BOARD EVAL FOR AD8139ACP RoHS:是 類(lèi)別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估板 - 運(yùn)算放大器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:-
AD8139ACP-R2 制造商:Analog Devices 功能描述:SP Amp DIFF AMP Single R-R O/P ±6V/12V 8-Pin LFCSP EP T/R 制造商:Rochester Electronics LLC 功能描述:HIGH PERFORMANCE LOW NOISE ADC DRIVER - Bulk
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*