HI7190集成電路（IC）的模數(shù)轉(zhuǎn)換器（ADC）規(guī)格書PDF中文資料

The Intersil HI7190 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 autocalibrate 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 specifications.

Features

? 22-Bit Resolution with No Missing Code

? 0.0007 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

? Additional Reference Literature

- Technical Brief, TB348 “HI7190/1 Negative Full Scale Error vs Conversion Frequency”

- Application Note, AN9504 “A Brief Intro to Sigma Delta Conversion”

- Technical Brief, TB329 “Intersil Sigma Delta Calibration Technique”

- Application Note, AN9505 “Using the HI7190 Evaluation Kit”

- Technical Brief, TB331 “Using the HI7190 Serial Interface”

- Application Note, AN9527 “Interfacing HI7190 to a Microcontroller”

- Application Note, AN9532 “Using HI7190 in a Multiplexed System”

- Application Note, AN9601 “Using HI7190 with a Single +5V Supply”