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參數(shù)資料
| 型號： | HI7191IP |
| 廠商： | HARRIS SEMICONDUCTOR |
| 元件分類： | ADC |
| 英文描述： | 24-Bit, High Precision, Sigma Delta A/D Converter |
| 中文描述： | 1-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDIP20 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大?。?/td> | 187K |
| 代理商： | HI7191IP |
1897
March 1998
HI7191
24-Bit, High Precision,
Sigma Delta A/D Converter
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 Conversion”
- TB329 “Intersil Sigma Delta Calibration Technique”
- AN9505 “Using the HI7190 Evaluation Kit”
- TB331 “Using the HI7190 Serial Interface”
- AN9527 “Interfacing HI7190 to a Microcontroller”
- AN9532 “Using HI7190 in a Multiplexed System”
- AN9601 “Using HI7190 with a Single +5V Supply”
Description
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.
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.
Pinout
HI7191
(PDIP, SOIC)
TOP VIEW
Ordering Information
PART NUMBER
TEMP.
RANGE (
o
C)
PACKAGE
PKG.
NO.
HI7191IP
-40 to 85
20 Ld PDIP
E20.3
HI7191IB
-40 to 85
20 Ld SOIC
M20.3
HI7190EVAL
Evaluation Kit
11
12
13
14
15
16
17
18
20
19
10
9
8
7
6
5
4
3
2
1
SCLK
SDO
SDIO
CS
DRDY
DGND
V
RLO
V
RHI
V
CM
AV
SS
MODE
RESET
OSC
1
OSC
2
DV
DD
AGND
SYNC
AV
DD
V
INHI
V
INLO
File Number
4138.3
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
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