DATASHEET HI7190 FN3612 Rev 10.00 24-Bit, High Precision, Sigma Delta A/D Converter June 27, 2006 The Intersil HI7190 is a monolithic instrumentation, sigma Features delta A/D converter which operates from 5V supplies. Both 22-Bit Resolution with No Missing Code the signal and reference inputs are fully differential for maximum flexibility and performance. An internal 0.0007% Integral Non-Linearity (Typ) Programmable Gain Instrumentation Amplifier (PGIA) 20mV to 2.5V Full Scale Input Ranges provides input gains from 1 to 128 eliminating the need for Internal PGIA with Gains of 1 to 128 external pre-amplifiers. The on-demand converter auto- calibrate function is capable of removing offset and gain Serial Data I/O Interface, SPI Compatible errors existing in external and internal circuitry. The on-board Differential Analog and Reference Inputs user programmable digital filter provides over 120dB of 60/50Hz noise rejection and allows fine tuning of resolution Internal or System Calibration and conversion speed over a wide dynamic range. The 120dB Rejection of 60/50Hz Line Noise HI7190 and HI7191 are functionally the same device, but the HI7190 has tighter linearity specifications. Settling Time of 4 Conversions (Max) for a Step Input Pb-Free Plus Anneal Available (RoHS Compliant) The HI7190 contains a serial I/O port and is compatible with most synchronous transfer formats including both the Applications Motorola 6805/11 series SPI and Intel 8051 series SSR protocols. A sophisticated set of commands gives the user Process Control and Measurement control over calibration, PGIA gain, device selection, standby Industrial Weight Scales mode, and several other features. The On-chip Calibration Registers allow the user to read and write calibration data. Part Counting Scales Laboratory Instrumentation Pinout Seismic Monitoring HI7190 20 LD SOIC, PDIP Magnetic Field Monitoring TOP VIEW Additional Reference Literature 1 MODE SCLK 20 - Technical Brief, TB348 HI7190/1 Negative Full Scale SDO 2 SYNC 19 Error vs Conversion Frequency SDIO 3 18 RESET - Application Note, AN9504 A Brief Intro to Sigma Delta CS 4 17 OSC 1 Conversion DRDY 5 16 OSC 2 - Technical Brief, TB329 Intersil Sigma Delta Calibration DGND 6 15 DV Technique DD AV 7 14 AGND - Application Note, AN9505 Using the HI7190 Evaluation SS Kit V 8 13 AV RLO DD - Technical Brief, TB331 Using the HI7190 Serial V 9 12 V RHI INHI Interface V 10 11 V CM INLO - 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 FN3612 Rev 10.00 Page 1 of 25 June 27, 2006HI7190 Ordering Information TEMP. PART PART RANGE PKG. NUMBER MARKING (C) PACKAGE DWG. HI7190IP HI7190IP -40 to 85 20 Ld PDIP E20.3 HI7190IPZ HI7190IPZ -40 to 85 20 Ld PDIP* E20.3 (Pb-free) HI7190IB HI7190IB -40 to 85 20 Ld SOIC M20.3 HI7190IBZ HI7190IBZ -40 to 85 20 Ld SOIC M20.3 (Note) (Pb-free) HI7190IBZ-T HI7190IBZ -40 to 85 20 Ld SOIC M20.3 (Note) Tape and Reel (Pb-free) HI7190EVAL Evaluation Kit *Pb-free PDIPs can be used for through hole wave solder processing only. They are not intended for use in Reflow solder processing applications. NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. Functional Block Diagram V V RHI RLO AV DD REFERENCE INPUTS TRANSDUCER BURN-OUT CURRENT MODULATOR PGIA DIGITAL FILTER V INHI V 1 INLO 1-BIT D/A V CM CONTROL AND SERIAL INTERFACE UNIT SERIAL INTERFACE UNIT CONTROL REGISTER CLOCK GENERATOR OSC OSC DRDY RESET SYNC CS MODE S SDIO SDO 1 2 CLK FN3612 Rev 10.00 Page 2 of 25 June 27, 2006