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HI7190

Intersil Corporation
Part Number HI7190
Manufacturer Intersil Corporation
Description Sigma Delta A/D Converter
Published May 16, 2007
Detailed Description Semiconductor HI7190 24-Bit, High Precision, Sigma Delta A/D Converter Description The Harris HI7190 is a monolithic in...
Datasheet PDF File HI7190 PDF File

HI7190
HI7190

Overview
Semiconductor HI7190 24-Bit, High Precision, Sigma Delta A/D Converter Description The Harris 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 ondemand 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 so all discussion will refer to the HI7190 for simplicity.
The HI7190 contains a serial I/O port and is compatible with most synchronous transfer formats including both the Motorola 6805/11 series SPI and Intel 8051 series SSR protocols.
A sophisticated set of commands gives the user control over calibration, PGIA gain, device selection, standby mode, and several other features.
The On-chip Calibration Registers allow the user to read and write calibration data.
March 1998 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 Applications • Process Control and Measurement • Industrial Weight Scales • Part Counting Scales • Laboratory Instrumentation • Seismic Monitoring • Magnetic Field Monitoring • Additional Reference Literature - TB348 “HI7190/1 Negative Full Scale Error vs Conversion Frequency” - AN9504 “A Brief Intro to Sigma Delta Conver...


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