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MAX11284 PDF预览

MAX11284

更新时间: 2024-11-05 14:58:11
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
44页 1466K
描述
双路、24位、低功耗、高SNR、4ksps、Δ-Σ ADC,内置PGA

MAX11284 数据手册

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MAX11284  
Dual 24-Bit, Low-Power, High-SNR,  
4ksps Delta-Sigma ADCs with Integrated PGAs  
General Description  
Benefits and Features  
High Resolution for Instrumentation Applications That  
The MAX11284 is a dual 24-bit delta sigma ADC that  
achieves excellent SNR while dissipating a low 3.6mW per  
ADC. Precision DC and AC measurements can be made at  
sample rates up to 4ksps. Integral nonlinearity is guaranteed  
to 4ppm maximum and the THD is -120dB. The MAX11284  
communicates through an SPI-compatible serial interface  
and is available in a small, 40-pin TQFN package.  
Require a Wide Dynamic Range  
• 131dB SNR at 31.25sps in Buffer Mode  
• 114dB SNR at 2000sps in Buffer Mode  
Low Power  
• Digital Current with FIR Filter, 1ksps: 500µA  
• Analog Current PGA Low-Power Mode: 2.1mA  
Sleep Current: 1.2μA  
The PGAs can operate in either low-noise (9.1nV/√Hz)  
or low-power (13.6nV/√Hz) mode, and have selectable  
gain values ranging from 1x to 128x. Optional buffers are  
also included to provide isolation of the signal inputs from  
the switched capacitor sampling network. This allows the  
ADCs to be used with high-impedance sources without  
compromising available dynamic range.  
High Accuracy for DC Measurements  
• 1ppm INL (typ), 4ppm (max)  
Single/Split Analog Supplies Provide Input Voltage  
Range Flexibility  
• 2.7V to 3.6V (Single-Supply) or ±1.8V (Split Supplies)  
Digital Filters  
The MAX11284 operates from a single 2.7V to 3.6V  
analog supply, or split ±1.8V analog supplies, allowing  
the analog input to be sampled below ground. The digital  
supply range is 2.0V to 3.6V, allowing communication with  
2.5V, 3V, or 3.3V logic.  
• Programmable SINC + FIR + IIR  
• Linear/Minimum Phase Response  
• Programmable High-Pass Filter  
• Selectable FIR Data Rates: 31.25sps to 4ksps  
Enables System Integration  
• Low-Noise and Low-Power mode PGA with Gains  
of 1, 2, 4, 8, 16, 32, 64, 128  
Applications  
Seismic Data Acquisition  
● Scientific Instrumentation  
High-Precision Portable Sensors  
Medical Equipment  
ATE  
• Signal Buffer Optional  
• 2 General-Purpose I/Os  
Integrated Offset and Gain Self-Calibration and  
System Gain and Offset Calibration Registers  
Small 40-Pin TQFN Package  
Ordering Information appears at end of data sheet.  
19-8268; Rev 0; 4/16  

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