参数资料
型号: AD9637BCPZRL7-80
厂商: Analog Devices Inc
文件页数: 11/40页
文件大小: 0K
描述: IC ADC 12BIT SRL 80MSPS 64LFCSP
标准包装: 750
位数: 12
采样率(每秒): 80M
数据接口: LVDS,串行,SPI?
转换器数目: 8
功率耗散(最大): 574mW
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: *
输入数目和类型: 8 个差分
Data Sheet
AD9637
Rev. A | Page 19 of 40
Differential Input Configurations
There are several ways to drive the AD9637 either actively or
passively. However, optimum performance is achieved by driving
the analog input differentially. Using a differential double balun
configuration to drive the AD9637 provides excellent performance
and a flexible interface to the ADC (see Figure 46) for baseband
applications.
For applications where SNR is a key parameter, differential trans-
former coupling is the recommended input configuration (see
Figure 47), because the noise performance of most amplifiers is
not adequate to achieve the true performance of the AD9637.
Regardless of the configuration, the value of the shunt capacitor,
C, is dependent on the input frequency and may need to be
reduced or removed.
It is not recommended to drive the AD9637 input single-ended.
VOLTAGE REFERENCE
A stable and accurate 1.0 V voltage reference is built into the
AD9637. VREF can be configured using either the internal 1.0 V
reference or an externally applied 1.0 V reference voltage. The
various reference modes are summarized in the sections that
follow. The VREF pin should be externally decoupled to ground
with a low ESR, 1.0 μF capacitor in parallel with a low ESR,
0.1 μF ceramic capacitor.
Internal Reference Connection
A comparator within the AD9637 detects the potential at the
SENSE pin and configures the reference into two possible modes,
which are summarized in Table 9. If SENSE is grounded, the
reference amplifier switch is connected to the internal resistor
divider (see Figure 45), setting VREF to 1.0 V.
Table 9. Reference Configuration Summary
Selected Mode
SENSE
Voltage (V)
Resulting
VREF (V)
Resulting
Differential
Span (V p-p)
Fixed Internal
Reference
AGND to 0.2
1.0 internal
2.0
Fixed External
Reference
AVDD
1.0 applied
to external
VREF pin
2.0
VREF
SENSE
0.5V
ADC
SELECT
LOGIC
0.1F
1.0F
VIN– x
VIN+ x
ADC
CORE
10215-
044
Figure 45. Internal Reference Configuration
ADC
R
0.1F
2V p-p
VCM
C
*C1
C
R
0.1F
33
200
33
VIN+ x
VIN– x
ET1-1-I3
C
5pF
R
*C1 IS OPTIONAL
10215-
045
Figure 46. Differential Double Balun Input Configuration for Baseband Applications
2V p-p
R
*C1
*C1 IS OPTIONAL
49.9Ω
0.1μF
ADT1-1WT
1:1 Z RATIO
VIN– x
ADC
VIN+ x
*C1
C
VCM
33
200
0.1F
5pF
10215-
046
Figure 47. Differential Transformer-Coupled Configuration for Baseband Applications
相关PDF资料
PDF描述
AD9639BCPZ-170 IC ADC 12B 170MSPS QUAD 72LFCSP
AD9640ABCPZ-125 IC ADC 14BIT 125MSPS 64LFCSP
AD9641BCPZ-80 IC ADC 14BIT SRL 80MSPS 32LFCSP
AD9644BCPZ-80 IC ADC 14BIT 80MSPS 3V 48LFCSP
AD9648BCPZRL7-125 IC ADC 14BIT 125MSPS 64LFCSP
相关代理商/技术参数
参数描述
AD9639-210KITZ 功能描述:模数转换器 - ADC Quad 12 Bit 210 MSPS Seria 1.8V ADC EB RoHS:否 制造商:Analog Devices 通道数量: 结构: 转换速率: 分辨率: 输入类型: 信噪比: 接口类型: 工作电源电压: 最大工作温度: 安装风格: 封装 / 箱体:
AD9639BCPZ-170 功能描述:IC ADC 12B 170MSPS QUAD 72LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:250 系列:- 位数:12 采样率(每秒):1.8M 数据接口:并联 转换器数目:1 功率耗散(最大):1.82W 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-LQFP 供应商设备封装:48-LQFP(7x7) 包装:管件 输入数目和类型:2 个单端,单极
AD9639BCPZ-210 功能描述:IC ADC 12B 170MSPS QUAD 72LFCSP 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:microPOWER™ 位数:8 采样率(每秒):1M 数据接口:串行,SPI? 转换器数目:1 功率耗散(最大):- 电压电源:模拟和数字 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-VQFN 裸露焊盘(4x4) 包装:Digi-Reel® 输入数目和类型:8 个单端,单极 产品目录页面:892 (CN2011-ZH PDF) 其它名称:296-25851-6
AD9639BCPZRL-170 功能描述:IC ADC 12B 170MSPS QUAD 72LFCSP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:250 系列:- 位数:12 采样率(每秒):1.8M 数据接口:并联 转换器数目:1 功率耗散(最大):1.82W 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-LQFP 供应商设备封装:48-LQFP(7x7) 包装:管件 输入数目和类型:2 个单端,单极
AD9639BCPZRL-210 功能描述:模数转换器 - ADC Quad 12 Bit 210 MSPS Seria 1.8V ADC RoHS:否 制造商:Analog Devices 通道数量: 结构: 转换速率: 分辨率: 输入类型: 信噪比: 接口类型: 工作电源电压: 最大工作温度: 安装风格: 封装 / 箱体: