参数资料
型号: AD9608BCPZ-105
厂商: Analog Devices Inc
文件页数: 17/40页
文件大小: 0K
描述: IC ADC DUAL 10BIT 64-LFCSP
标准包装: 1
位数: 10
采样率(每秒): 105M
数据接口: LVDS,并联,串行,SPI
转换器数目: 2
电压电源: 模拟和数字
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-VFQFN 裸露焊盘,CSP
供应商设备封装: 64-LFCSP-VQ(9x9)
包装: 托盘
输入数目和类型: 4 个单端,2 个差分
AD9608
Rev. 0 | Page 24 of 40
Input Common Mode
The analog inputs of the AD9608 are not internally dc-biased.
Therefore, in ac-coupled applications, the user must provide
a dc bias externally. Setting the device so that VCM = AVDD/2
is recommended for optimum performance, but the device can
function over a wider range with reasonable performance, as
shown in Figure 43.
An on-board, common-mode voltage reference is included in
the design and is available from the VCM pin. The VCM pin
must be decoupled to ground by a 0.1 μF capacitor, as described
0
10
20
30
40
50
60
70
80
90
100
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
S
NR/
S
F
D
R
(
d
BF
S
/d
B
c)
INPUT COMMON-MODE VOLTAGE (V)
SFDR (dBc)
SNR (dBFS)
099
77-
056
Figure 43. SNR/SFDR vs. Input Common-Mode Voltage,
fIN = 70 MHz, fS = 125 MSPS
Differential Input Configurations
Optimum performance is achieved while driving the AD9608 in
a differential input configuration. For baseband applications,
the AD8138, ADA4937-2, and ADA4938-2 differential drivers
provide excellent performance and a flexible interface to the ADC.
The output common-mode voltage of the ADA4938-2 is easily
set with the VCM pin of the AD9608 (see Figure 44), and the
driver can be configured in a Sallen-Key filter topology to
provide band limiting of the input signal.
AVDD
VIN
76.8
120
0.1F
33
10pF
200
90
ADA4938
ADC
VIN–x
VIN+x
VCM
09
977
-0
50
Figure 44. Differential Input Configuration Using the ADA4938-2
For baseband applications below ~10 MHz where SNR is a key
parameter, differential transformer coupling is the recommended
input configuration (see Figure 45). To bias the analog input,
the VCM voltage can be connected to the center tap of the
secondary winding of the transformer.
2V p-p
49.9
0.1F
R
C
ADC
VCM
VIN+x
VIN–x
0997
7-
051
Figure 45. Differential Transformer-Coupled Configuration
The signal characteristics must be considered when selecting
a transformer. Most RF transformers saturate at frequencies that
are below a few megahertz (MHz). Excessive signal power can
also cause core saturation, which leads to distortion.
At input frequencies in the second Nyquist zone and above, the
noise performance of most amplifiers is not adequate to achieve
the true SNR performance of the AD9608. For applications above
~10 MHz where SNR is a key parameter, differential double balun
coupling is the recommended input configuration (see Figure 46).
An alternative to using a transformer-coupled input at frequencies
in the second Nyquist zone is to use the AD8352 differential driver
(see Figure 47). See the AD8352 data sheet for more information.
ADC
R
0.1F
2V p-p
VCM
C
R
0.1F
S
0.1F
25
S
PA
P
VIN+x
VIN–x
099
77-
053
Figure 46. Differential Double Balun Input Configuration
AD8352
0
CD
RD
RG
0.1F
16
1
2
3
4
5
11
0.1F
10
14
0.1F
8, 13
VCC
200
ANALOG INPUT
R
C
ADC
VCM
VIN+x
VIN–x
099
77-
054
Figure 47. Differential Input Configuration Using the AD8352
相关PDF资料
PDF描述
VI-BTK-IV-F2 CONVERTER MOD DC/DC 40V 150W
LTC1278-5CSW#PBF IC A/DCONV SAMPLNG W/SHTDN24SOIC
LTC1278-5CSW IC A/DCONV SAMPLNG W/SHTDN24SOIC
VI-BTJ-IV-F4 CONVERTER MOD DC/DC 36V 150W
AD7777ARZ IC ADC 10BIT 4CH HS 28SOIC
相关代理商/技术参数
参数描述
AD9608BCPZ-125 功能描述:IC ADC DUAL 10BIT 64-LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 其它有关文件:TSA1204 View All Specifications 标准包装:1 系列:- 位数:12 采样率(每秒):20M 数据接口:并联 转换器数目:2 功率耗散(最大):155mW 电压电源:模拟和数字 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-TQFP 供应商设备封装:48-TQFP(7x7) 包装:Digi-Reel® 输入数目和类型:4 个单端,单极;2 个差分,单极 产品目录页面:1156 (CN2011-ZH PDF) 其它名称:497-5435-6
AD9608BCPZRL7-105 功能描述:IC ADC 10BIT 105MSPS 64LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:12 采样率(每秒):300k 数据接口:并联 转换器数目:1 功率耗散(最大):75mW 电压电源:单电源 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-SOIC(0.295",7.50mm 宽) 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端,单极;1 个单端,双极
AD9608BCPZRL7-125 功能描述:IC ADC 10BIT 125MSPS 64LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:- 位数:14 采样率(每秒):83k 数据接口:串行,并联 转换器数目:1 功率耗散(最大):95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP(0.600",15.24mm) 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端,双极
AD9609 制造商:AD 制造商全称:Analog Devices 功能描述:10-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS 1.8 V Analog-to-Digital Converter
AD9609-20EBZ 功能描述:BOARD EVALUATION AD9609 20MSPS RoHS:是 类别:编程器,开发系统 >> 评估板 - 模数转换器 (ADC) 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- ADC 的数量:1 位数:12 采样率(每秒):94.4k 数据接口:USB 输入范围:±VREF/2 在以下条件下的电源(标准):- 工作温度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板,软件