The Intersil HI7191 is a monolithic instrumentation, sigma delta A/D converter which operates from ?5V supplies. Both the signal and reference inputs are fully differential for maximum flexibility and performance. An internal Programmable Gain Instrumentation Amplifier (PGIA) provides input gains from 1 to 128 eliminating the need for external pre-amplifiers. The on-demand converter auto-calibrate function is capable of removing offset and gain errors existing in external and internal circuitry. The on-board user programmable digital filter provides over 120dB of 60/50Hz noise rejection and allows fine tuning of resolution and conversion speed over a wide dynamic range. The HI7190 and HI7191 are functionally the same device, but the HI7190 has tighter linearity specs.

Features

? 20-Bit Resolution with No Missing Code

? 0.0015 Integral Non-Linearity (Typ)

? 20mV to ±2.5V Full Scale Input Ranges

? Internal PGIA with Gains of 1 to 128

? Serial Data I/O Interface, SPI Compatible

? Differential Analog and Reference Inputs

? Internal or System Calibration

? 120dB Rejection of 60/50Hz Line Noise

? Settling Time of 4 Conversions (Max) for a Step Input

? Pb-Free Plus Anneal Available (RoHS Compliant)

Applications

? Process Control and Measurement

? Industrial Weight Scales

? Part Counting Scales

? Laboratory Instrumentation

? Seismic Monitoring

? Magnetic Field Monitoring

HI7191IBZ-T屬于集成電路（IC） > 模數(shù)轉(zhuǎn)換器（ADC）。瑞薩科技有限公司制造生產(chǎn)的HI7191IBZ-T模數(shù)轉(zhuǎn)換器（ADC）模數(shù)轉(zhuǎn)換器（ADC、A/D 或 A 轉(zhuǎn) D）對模擬信號進行采樣，例如由麥克風采集的聲音或傳感器的輸出，然后將其轉(zhuǎn)換為數(shù)字信號。一般來說，數(shù)字輸出是二進制補碼二進制數(shù)，與輸入成比例。輸入類型可能是差分、偽差分或單端輸入。模數(shù)轉(zhuǎn)換器可按照位數(shù)、采樣率、輸入數(shù)、接口、轉(zhuǎn)換器數(shù)和架構（例如自適應增量、雙斜率、折疊、流水線、SAR、三角積分、兩步式）進行選擇。