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参数资料
| 型号： | MAX1403EAI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 29/36页 |
| 文件大小： | 0K |
| 描述： | IC ADC 18BIT LP 28-SSOP |
| 产品培训模块： | MAX11200 ADC Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 46 |
| 位数： | 18 |
| 采样率（每秒）： | 480 |
| 数据接口： | QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 21.45mW |
| 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： | 28-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 28-SSOP |
| 包装： | 管件 |
| 输入数目和类型： | 3 个差分，单极；3 个差分，双极；5 个伪差分，单极；5 个伪差分，双极 |
| 产品目录页面： | 1396 (CN2011-ZH PDF) |
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MAX1403
+3V, 18-Bit, Low-Power, Multichannel,
Oversampling (Sigma-Delta) ADC
______________________________________________________________________________________
35
Unlike the 3-wire configuration, the 4-wire configuration
(Figure 18) has no error associated with lead resis-
tances, as no current flows in the measurement leads
connected to AIN1 and AIN2. Current source OUT1
provides the excitation current for the RTD, and current
source OUT2 provides current to generate the refer-
ence voltage. This reference voltage, developed across
RREF, ensures that the analog input voltage span
remains ratiometric to the reference voltage. RTD temp-
co errors in the analog input voltage are due to the tem-
perature drift of the RTD current source and are
compensated for by the variation in the reference volt-
age. A common resistance value for the RTD is 100
,
generating a 20mV signal directly handled at the ana-
log input of the MAX1403. The voltage at OUT1 and
OUT2 can go to within 1.0V of the V+ supply.
Power Supplies
No specific power sequence is required for the
MAX1403; either the V+ or the VDD supply can come
up first. While the latchup performance of the MAX1403
is good, to avoid latchup it is important that power be
applied to the MAX1403 before the analog input signals
(AIN_) or the CLKIN inputs. If this is not possible, then
the current flow into any of these pins should be limited
to 50mA. If separate supplies are used for the
MAX1403 and the system digital circuitry, then the
MAX1403 should be powered up first.
Grounding and Layout
For best performance, use printed circuit boards with
separate analog and digital ground planes. Wire-wrap
boards are not recommended.
Design the printed circuit board so that the analog and
digital sections are separated and confined to different
areas of the board. Join the digital and analog ground
planes at only one point. If the MAX1403 is the only
device requiring an AGND to DGND connection, then
the ground planes should be connected at the AGND
and DGND pins of the MAX1403. In systems where mul-
tiple devices require AGND to DGND connections, the
connection should still be made at only one point. Make
the star ground as close to the MAX1403 as possible.
Avoid running digital lines under the device because
these may couple noise onto the die. Run the analog
ground plane under the MAX1403 to minimize coupling
of digital noise. Make the power-supply lines to the
MAX1403 as wide as possible to provide low-imped-
ance paths and reduce the effects of glitches on the
power-supply line.
Figure 18. 4-Wire RTD Application
V+
200
A
+3V
VDD
OUT2
REFIN+
AIN1
AIN2
AGND
DGND
PGA
MODULATOR
GAIN = 1 TO 128
200
A
RTD
RREF
REFIN-
OUT1
MAX1403
DGND
GAIN = 1 TO 128
PGA
MODULATOR
MAX1403
200
A
200
A
OUT1
AIN1
12.5k
AIN2
OUT2
AGND
RL3
RL2
RL1
V+
VDD
REFIN- REFIN+
RTD
Figure 17. 3-Wire RTD Application
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1403EAI+ | 功能描述:模数转换器 - ADC 18-Bit 5Ch 4.8ksps 1.25V Precision 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 |
| MAX1403EAI+T | 功能描述:模数转换器 - ADC 18-Bit 5Ch 4.8ksps 1.25V Precision 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 |
| MAX1403EAI-T | 功能描述:模数转换器 - 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 |
| MAX1403EVKIT | 功能描述:数据转换 IC 开发工具 MAX1403 Eval 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 |
| MAX1403EVL11 | 功能描述:数据转换 IC 开发工具 MAX1403 Eval 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 |
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