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HI7191

更新时间： 2024-11-11 22:33:31
品牌 Logo 应用领域
英特矽尔 - INTERSIL 转换器
页数 文件大小 规格书
24页 189K
描述
24-Bit, High Precision, Sigma Delta A/D Converter

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HI7191 数据手册

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HI7191  
24-Bit, High Precision,  
Sigma Delta A/D Converter  
March 1998  
Features  
Description  
• 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  
The Intersil HI7191 is a monolithic instrumentation, sigma delta  
A/D converter which operates from ±5V supplies. Both the sig-  
nal and reference inputs are fully differential for maximum flexi-  
bility 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 remov-  
ing offset and gain errors existing in external and internal cir-  
cuitry. 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 HI7191 and HI7191 are functionally the same device so all  
discussion will refer to the HI7191 for simplicity.  
• -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  
The HI7191 contains a serial I/O port and is compatible with  
most synchronous transfer formats including both the Motor-  
ola 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.  
• Laboratory Instrumentation  
• Seismic Monitoring  
• Magnetic Field Monitoring  
• Additional Reference Literature  
- TB348 “HI7190/1 Negative Full Scale Error vs  
Conversion Frequency”  
Ordering Information  
TEMP.  
PKG.  
NO.  
- AN9504 “A Brief Intro to Sigma Delta Conversion”  
- TB329 “Intersil Sigma Delta Calibration Technique”  
- AN9505 “Using the HI7190 Evaluation Kit”  
o
PART NUMBER RANGE ( C)  
PACKAGE  
20 Ld PDIP  
20 Ld SOIC  
HI7191IP  
-40 to 85  
-40 to 85  
E20.3  
M20.3  
- TB331 “Using the HI7190 Serial Interface”  
HI7191IB  
- AN9527 “Interfacing HI7190 to a Microcontroller”  
- AN9532 “Using HI7190 in a Multiplexed System”  
- AN9601 “Using HI7190 with a Single +5V Supply”  
HI7190EVAL  
Evaluation Kit  
Pinout  
HI7191  
(PDIP, SOIC)  
TOP VIEW  
1
2
MODE  
SYNC  
20  
19  
SCLK  
SDO  
SDIO  
CS  
3
18 RESET  
4
17 OSC  
16 OSC  
1
DRDY  
DGND  
5
2
6
15 DV  
DD  
14 AGND  
AV  
V
7
SS  
8
13 AV  
DD  
RLO  
9
12  
V
V
RHI  
INHI  
V
10  
11 V  
INLO  
CM  
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.  
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999  
File Number 4138.3  
1897  
1234567...24

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