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LTC1098ACS8 データシート(PDF) 32 Page - Linear Technology

部品番号 LTC1098ACS8
部品情報  Micropower Sampling 8-Bit Serial I/O A/D Converters
PDF  32 Pages
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メーカー  LINER [Linear Technology]
ホームページ  http://www.linear.com
Logo LINER - Linear Technology

LTC1098ACS8 データシート(HTML) 32 Page - Linear Technology

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LTC1096/LTC1096L
LTC1098/LTC1098L
32
10968fc
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
© LINEAR TECHNOLOGY CORPORATION 1994
LT 0708 REV C • PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER
DESCRIPTION
COMMENTS
LTC1196/LTC1198
8-Pin SO, 1Msps, 8-Bit ADCs
Low Power, Small Size, Low Cost
LTC1286/LTC1298
8-Pin SO, 5V Micropower, 12-Bit ADCs
1- or 2-Channel, Auto Shutdown
LTC1285/LTC1298
8-Pin SO, 3V Micropower, 12-Bit ADCs
1- or 2-Channel, Auto Shutdown
LTC1400
5V High Speed,Serial 12-Bit ADC
400ksps, Complete with VREF, CLK, Sample-and-Hold
LTC1594/LTC1598
4- and 8-Channel, 5V Micropower, 12-Bit ADCs
Low Power, Small Size, Low Cost
LTC1594L/LTC1598L
4- and 8-Channel, 3V Micropower, 12-Bit ADCs
Low Power, Small Size, Low Cost
A/D Conversion for 3V Systems
The LTC1096/LTC1098 are ideal for 3V systems. Figure
17 shows a 3V to 6V battery current monitor that draws
only 70μA from the battery it monitors. The battery cur-
rent is sensed with the 0.02Ω resistor and amplified by
the LT1178. The LTC1096 digitizes the amplifier output
and sends it to the microprocessor in serial format. The
LT1004 provides the full-scale reference for the ADC. The
other half of the LTC1178 is used to provide low battery
detection. The circuit’s 70μA supply current is dominated
by the op amps and the reference. The circuit can be
located near the battery and data transmitted serially to
the microprocessor.
Figure 17. This 0A to 2A Battery Current Monitor Draws Only 70μA from a 3V Battery
–
+
750k
0.1μF
0.02Ω FOR 2A FULL SCALE
0.2Ω FOR 0.2A FULL SCALE
24.9k
L
O
A
D
1/2 LT1178
LTC1096
CS
GND
VCC
CLK
DOUT
VREF
LT1004-1.2
73.2k
470k
20M
470k
LO BATTERY
0.1μF
+
–
3V TO 6V
TO μP
–
+
1/2 LT1178
10968 F17



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