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HI-674A/883

更新时间： 2024-09-25 14:57:31
品牌 Logo 应用领域
瑞萨 - RENESAS /
页数 文件大小 规格书
18页 626K
描述
Complete, 12-Bit A/D Converters with Microprocessor Interface

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HI-674A/883 数据手册

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DATASHEET  
HI-574A, HI-674A  
Complete, 12-Bit A/D Converters with Microprocessor Interface  
FN3096  
Rev 6.00  
Aug 7, 2008  
The HI-X74(A) is a complete 12-bit, Analog-to-Digital  
Features  
Converter, including a +10V reference clock, three-state  
outputs and a digital interface for microprocessor control.  
Successive approximation conversion is performed by two  
monolithic dice housed in a 28 lead package. The bipolar  
analog die features the Intersil Dielectric Isolation process,  
which provides enhanced AC performance and freedom  
from latch-up.  
• Complete 12-Bit A/D Converter with Reference and Clock  
• Full 8-Bit, 12-Bit or 16-Bit Microprocessor Bus Interface  
• Bus Access Time . . . . . . . . . . . . . . . . . . . . . . . . . . . 150ns  
• No Missing Codes Over Temperature  
• Minimal Setup Time for Control Signals  
Custom design of each IC (bipolar analog and CMOS digital)  
has yielded improved performance over existing versions of  
this converter. The voltage comparator features high PSRR  
plus a high speed current-mode latch, and provides precise  
decisions down to 0.1 LSB of input overdrive. More than 2X  
reduction in noise has been achieved by using current  
instead of voltage for transmission of all signals between the  
analog and digital ICs. Also, the clock oscillator is current  
controlled for excellent stability over temperature.  
• Fast Conversion Times  
- HI-574A (Max) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25µs  
- HI-674A (Max) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15µs  
• Low Noise, via Current-Mode Signal Transmission  
Between Chips  
• Byte Enable/Short Cycle (A Input)  
O
- Guaranteed Break-Before-Make Action, Eliminating Bus  
Contention During Read Operation. Latched by Start  
Convert Input (To Set the Conversion Length)  
The HI-X74(A) offers standard unipolar and bipolar input  
ranges, laser trimmed for specified linearity, gain and offset  
accuracy. The low noise buried zener reference circuit is  
trimmed for minimum temperature coefficient.  
• Supply Voltage . . . . . . . . . . . . . . . . . . . . . . ±12V to ±15V  
• Pb-Free Available (RoHS Compliant)  
Applications  
Power requirements are +5V and ±12V to ±15V, with typical  
dissipation of 385mW (HI-574A, HI-674A) at 12V.  
• Military and Industrial Data Acquisition Systems  
• Electronic Test and Scientific Instrumentation  
• Process Control Systems  
Pinout  
HI-574A, HI-674A  
(28 LD PDIP, SBDIP)  
TOP VIEW  
+5V SUPPLY, V  
LOGIC  
1
2
28  
STATUS, STS  
DB11 MSB  
DB10  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
DATA MODE SEL, 12/8  
3
CHIP SEL, CS  
BYTE ADDR/SHORT  
4
DB9  
CYCLE, A  
O
5
DB8  
READ/CONVERT, R/C  
CHIP ENABLE, CE  
6
DB7  
DIGITAL  
+12V/+15V SUPPLY, V  
CC  
7
DATA  
DB6  
DB5  
DB4  
DB3  
DB2  
DB1  
DB0  
OUTPUTS  
+10V REF, REF OUT  
8
ANALOG  
COMMON, AC  
9
10  
11  
12  
REFERENCE INPUT  
-12V/-15V SUPPLY, V  
EE  
BIPOLAR OFFSET  
BIP OFF  
10V INPUT 13  
LSB  
DIG COMMON,  
DC  
14  
20V INPUT  
FN3096 Rev 6.00  
Aug 7, 2008  
Page 1 of 18  
1234567...18

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