参数资料
型号: ADS7945SRTER
厂商: TEXAS INSTRUMENTS INC
元件分类: ADC
英文描述: 2-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQCC16
封装: GREEN, PLASTIC, QFN-16
文件页数: 36/49页
文件大小: 1322K
代理商: ADS7945SRTER
A
V
D
DVDD
C
H
S
E
L
SCLK
SDO
4
3
2
1
5
6
7
8
9
10
11
12
16
15
14
13
P
D
E
N
C
G
N
D
R
E
F
R
E
F
G
N
D
AIN0P
AIN1P
AIN0GND
AIN1GND
N
C
470 pF
C2
470 pF
C1
5
Input
Signal
Input
Signal
1 F
C3
Common Analog/
Digital Ground Plane
Reference
Input
Analog
Supply
1 F
C4
47
R1
0.1 F
C5
1 F
C6
Digital
Supply
D
ig
it
a
l
S
ig
n
a
ls
F
ro
m
H
o
st
ADS7946
U0
CS
SBAS539B
– JUNE 2011 – REVISED SEPTEMBER 2011
PCB LAYOUT/SCHEMATIC GUIDELINES: ADS7946
The ADS7946 is a mixed-signal device. For maximum performance, proper decoupling, grounding, and proper
termination of digital signals are essential. Figure 92 shows the essential components around the ADC. All
capacitors shown are ceramic. These decoupling capacitors must be placed close to the respective signal pins.
There is a 47
Ω source series termination resistor shown on the SDO signal. This resistor must be placed as
close to pin 15 as possible. Series terminations for SCLK and CS must be placed close to the host.
Figure 92. Recommended ADS7946 ADC Schematic
Copyright
2011, Texas Instruments Incorporated
41
Product Folder Link(s): ADS7945 ADS7946
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ADS7945SRTET 功能描述:模数转换器 - ADC 14B,2MSPS,DUAL-CH, UNIPOLAR,DIF,SAR ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32
ADS7946 制造商:TI 制造商全称:Texas Instruments 功能描述:14-Bit, 2 MSPS, Dual-Channel, Differential/Single-Ended, Ultralow-Power Analog-to-Digital Converters
ADS7946EVM-PDK 功能描述:数据转换 IC 开发工具 ADS7946 PERF DEM KIT RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V
ADS7946SRTER 功能描述:模数转换器 - ADC 14B,2MSPS,DUAL-CH, UNIP,PSE-DIF,SAR ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32
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