- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄2063 > ADA4937-2YCPZ-RL (Analog Devices Inc)IC ADC DRIVER DUAL DIFF 24LFCSP PDF資料下載
參數(shù)資料
| 型號(hào)： | ADA4937-2YCPZ-RL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 18/29頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC DRIVER DUAL DIFF 24LFCSP |
| 標(biāo)準(zhǔn)包裝： | 5,000 |
| 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： | 24-VFQFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 24-LFCSP-VQ（4x4） |
| 包裝： | 帶卷 (TR) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當(dāng)前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁
ADA4937-1/ADA4937-2
Data Sheet
Rev. D | Page 24 of 28
The circuit in Figure 66 shows a simplified front-end connection
for an ADA4937-1 driving an AD9246, 14-bit, 125 MSPS ADC.
The AD9246 achieves its optimum performance when driven
differentially. The ADA4937-x performs the single-ended-to-
differential conversion, eliminating the need for a transformer
to drive the ADC.
The ADA4937-x is configured with a single 5 V supply and a
gain of ~2 V/V for a single-ended input to differential output.
The 76.8 Ω termination resistor, in parallel with the single-ended
input impedance of 137 Ω, provides a 50 Ω ac termination for the
source. The additional 30 Ω (120 Ω total) at the inverting input
balances the parallel ac impedance of the 50 Ω source and the
termination resistor driving the noninverting input.
The signal generator has a symmetric, ground-referenced bipolar
therefore, the internal pull-ups set the output common-mode
voltage to midsupply. A portion of this is fed back to the summing
nodes, biasing IN and +IN at 0.55 V. For a common-mode vol-
tage of 2.5 V, each ADA4937-x output swings between 2.0 V and
3.0 V, providing a 2 V p-p differential output.
The output is ac-coupled to a single-pole, low-pass filter. This
reduces the noise bandwidth of the amplifier and provides some
level of isolation from the switched capacitor inputs of the ADC.
The AD9246 is set for a 2 V p-p full-scale input by connecting
the SENSE pin to AGND. The inputs of the AD9246 are biased
at 1 V by connecting the CML output, as shown in Figure 66.
The circuit was tested with a 1 dBFS signal at various frequencies.
Figure 65 shows a plot of the second- and third-order harmonic
distortion (HD2/HD3) vs. frequency.
–75
–80
–85
–90
–95
–100
0
120
80
40
100
60
20
HARM
O
NI
C
DI
S
T
O
R
T
IO
N
(
d
Bc)
FREQUENCY (MHz)
HD2
HD3
G = +2
06
59
1-
055
Figure 65. HD2/HD3 for Combination of ADA4937-x and AD9246 ADC
1.8V
DRVDD
AVDD
VIN–
VIN+
AD9246
AGND
CML
SENSE
D13 TO
D0
10pF
10F
33
200
50
VIN
90
76.8
5V
ADA4937-1
+
200
50
76.8
10F
06
59
1-
05
6
Figure 66. Driving an AD9246, 14-Bit, 125 MSPS ADC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADA4938-2ACPZ-RL | IC ADC DRIVER DUAL DIFF 24LFCSP |
| ADA4941-1YRZ-R7 | IC DIFF ADC DRIVER 18BIT 8SOIC |
| ADA4960-1ACPZ-R2 | IC ADC DRIVER DIFF 16LFCSP |
| ADATE205BSVZ | IC DCL DUAL 250MHZ ATE 100TQFP |
| ADATE206BSVZ | IC DCL DUAL 500MHZ ATE 100TQFP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADA4938-1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Ultra-Low Distortion Differential ADC Driver |
| ADA4938-1_06 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Ultra-Low Distortion Differential ADC Driver |
| ADA4938-1_07 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Ultra-Low Distortion Differential ADC Driver |
| ADA4938-1ACPZ-R2 | 制造商:Analog Devices 功能描述:SP Amp DIFF AMP Single ±5.5V/11V 16-Pin LFCSP EP T/R 制造商:Analog Devices 功能描述:SP AMP DIFF AMP SGL 5.5V/11V 16LFCSP EP - Tape and Reel 制造商:Analog Devices 功能描述:SP Amp DIFF AMP Single }5.5V/11V 16-Pin LFCSP EP Tape & Reel 制造商:Analog Devices 功能描述:IC AMP DIFFADCDR16BIT16LFCSP |
| ADA4938-1ACPZ-R2 | 制造商:Analog Devices 功能描述:IC DIFF AMP 1GHZ 4700V/S LFCSP-16 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。