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MAX1400

更新时间： 2023-12-20 18:46:34
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
34页 488K
描述
+5V、18位、低功耗、多通道、过采样(Σ-Δ) ADC

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MAX1400 数据手册

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19-1430; Rev 1; 7/02  
+5V, 18-Bit, Low-Power, Multichannel,  
Oversampling (Sigma-Delta) ADC  
General Description  
Features  
The MAX1400 18-bit, low-power, multichannel, serial-  
output ADC uses a sigma-delta modulator with a digital  
decimation filter to achieve true 16-bit accuracy. The  
user-selectable decimation factor of the digital filter  
allows the conversion resolution to be reduced in  
exchange for a higher output data rate. The device  
achieves true 16-bit performance at an output data rate of  
up to 480sps. In addition, the modulator sampling  
frequency may be optimized for either lowest power  
dissipation or highest throughput rate. The MAX1400  
operates from +5V.  
o 18-Bit Resolution, Sigma-Delta ADC  
o 16-Bit Performance with No Missing Codes  
to 480sps  
o Low Quiescent Current  
250µA (operating mode)  
2µA (power-down mode)  
o 3 Fully Differential or 5 Pseudo-Differential Signal  
Input Channels  
o 2 Additional Fully Differential Calibration  
This device offers three fully differential input channels  
that can be independently programmed with a gain  
between +1V/V and +128V/V. Furthermore, it can com-  
pensate an input-referred DC offset (such as system off-  
set) up to 117% of the selected full-scale range. These  
three differential channels may also be configured to  
operate as five pseudo-differential input channels. Two  
additional, fully differential system-calibration channels  
are provided for gain and offset error correction. External  
access is provided to the multiplexer (mux) output to  
facilitate additional signal processing.  
Channels/Auxiliary Input Channels  
o Access to the Mux Output/ADC Input  
o Programmable Gain and Offset  
o Fully Differential Reference Inputs  
o Converts Continuously or On Command  
o Automatic Channel Scanning and Continuous  
Data Output Mode  
o Operates with +5V Analog Supply and  
+3V or +5V Digital Supply  
The MAX1400 can be configured to scan all signal inputs  
sequentially and provide the results through the serial  
interface with minimum communications overhead. When  
used with a 2.4576MHz or 1.024MHz master clock, the  
digital decimation filter can be programmed to produce  
zeros in its frequency response at the line fre-  
quency and associated harmonics, ensuring excellent  
line rejection without the need for further post-filtering.  
o SPI™/QSPI™-Compatible 3-Wire Serial Interface  
o 28-Pin SSOP Package  
Pin Configuration  
TOP VIEW  
The MAX1400 comes in a 28-pin SSOP package.  
CLKIN  
CLKOUT  
CS  
1
2
3
4
5
6
7
8
9
28 SCLK  
27 DIN  
Applications  
Portable Industrial Instruments  
Portable Weigh Scales  
26 DOUT  
25 INT  
RESET  
MUXOUT+  
MUXOUT-  
ADCIN+  
ADCIN-  
AGND  
24 V  
DD  
Loop-Powered Systems  
MAX1400  
23 DGND  
Pressure Transducers  
22 CALOFF+  
21 CALOFF-  
20 REFIN+  
19 REFIN-  
18 CALGAIN+  
17 CALGAIN-  
16 AIN6  
Ordering Information  
V+ 10  
AIN1 11  
AIN2 12  
AIN3 13  
AIN4 14  
PART  
TEMP RANGE  
0°C to +70°C  
-40°C to +85°C  
PIN-PACKAGE  
28 SSOP  
MAX1400CAI  
MAX1400EAI  
28 SSOP  
15 AIN5  
SSOP  
SPI and QSPI are trademarks of Motorola, Inc.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
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