HI7190| Datasheet

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HI7190
Data Sheet June 27, 2006 FN3612.10

24-Bit, High Precision, Sigma Delta A/D Converter
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. 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 ov
er 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.

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

Pinout
HI7190 20 LD SOIC, PDIP TOP VIEW
SCLK SDO SDIO CS DRDY DGND AVSS VRLO VRHI 1 2 3 4 5 6 7 8 9 20 MODE 19 SYNC 18 RESET 17 OSC1 16 OSC2 15 DVDD 14 AGND 13 AVDD 12 VINHI 11 VINLO

VCM 10

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"

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2003, 2005-2006. All Rights Reserved. All other trademarks mentioned are the property of their respective owners.