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参数资料
| 型号： | ADS1225IRGVRG4 |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | 24-Bit Analog-to-Digital Converter with One- and Two-Channel Differential Inputs and Internal Oscillator |
| 中文描述： | 24位模拟数字转换器与单和双通道差分输入和内部振荡器 |
| 文件页数： | 17/24页 |
| 文件大小： | 398K |
| 代理商： | ADS1225IRGVRG4 |
www.ti.com
APPLICATION INFORMATION
GENERAL RECOMMENDATIONS
The ADS1225 and ADS1226 are high-resolution A/D
converters. Achieving optimal device performance
requires careful attention to the support circuitry and
printed circuit board (PCB) design.
Figure 31
shows
the
basic
connections
ADS1226. As with any precision circuit, be sure to
use good supply bypassing capacitor techniques. A
smaller value ceramic capacitor in parallel with a
larger value tantalum capacitor works well. Place the
capacitors, in particular the ceramic ones, close to
the supply pins. Use a ground plane and tie the
ADS1225 and ADS1226 GND pin and bypass
capacitors directly to it. Avoid ringing on the digital
inputs. Small resistors (
≈
100
) in series with the
digital
pins
can
help
by
impedance. Place these resistors at the source end.
ADS1226
START
SCLK
DRDY/DOUT
BUFEN
GND
AINN1
AINP1
AINN2
1
2
3
4
12
11
10
9
100
W
100
W
100
W
100
W
100
W
100
W
100
W
Same as shown
for AINP1 and AINN1.
10 F
m
16
15
A
D
V
V
T
M
M
A
0.1 F
m
0.1 F
m
+5V
+3V
10 F
m
14
13
5
6
7
8
0.1 F
m
REF1004
301
W
220pF
0.1 F
m
220pF
301
W
ADS1225
ADS1226
SBAS346–MAY 2006
Pay special attention to the reference and analog
inputs. These inputs are critical to performance.
Bypass
the
voltage
reference
techniques to the supply voltages. The quality of the
reference directly affects the overall accuracy of the
device. Make sure to use a low noise and low drift
reference such as the
REF1004
. Often, only a simple
RC filter is needed on the inputs. The circuit limits
the
higher
frequency
dielectrics for the capacitors and place them as close
as possible to the input pins. Keep the traces to the
input pins short, and carefully watch how they are
routed on the PCB.
using
similar
for
the
ADS1225
and
noise.
Avoid
low-grade
After the power supplies and reference voltage have
stabilized,
issue
a
self-calibration
minimize offset and gain errors.
command
to
controlling
the
trace
Figure 31. Basic Connections
17
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相关PDF资料 |
PDF描述 |
|---|---|
| ADS1225IRGVT | 24-Bit Analog-to-Digital Converter with One- and Two-Channel Differential Inputs and Internal Oscillator |
| ADS1225IRGVTG4 | 24-Bit Analog-to-Digital Converter with One- and Two-Channel Differential Inputs and Internal Oscillator |
| ADS1226 | 24-Bit Analog-to-Digital Converter with One- and Two-Channel Differential Inputs and Internal Oscillator |
| ADS1226IRGVR | 24-Bit Analog-to-Digital Converter with One- and Two-Channel Differential Inputs and Internal Oscillator |
| ADS1226IRGVRG4 | 24-Bit Analog-to-Digital Converter with One- and Two-Channel Differential Inputs and Internal Oscillator |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADS1225IRGVT | 功能描述:模数转换器 - ADC 24-Bit 100SPS 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 |
| ADS1225IRGVT | 制造商:Texas Instruments 功能描述:A/D Converter (A-D) IC |
| ADS1225IRGVTG4 | 功能描述:模数转换器 - ADC 24-Bit 100SPS 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 |
| ADS1226 | 制造商:AD 制造商全称:Analog Devices 功能描述:24-Bit Analog-to-Digital Converter with One- and Two-Channel Differential Inputs and Internal Oscillator |
| ADS1226IRGVR | 功能描述:模数转换器 - ADC 24-Bit 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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