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LTC1098AI Folha de dados(PDF) 28 Page - Linear Technology

Nome de Peças LTC1098AI
Descrição Electrónicos  Micropower Sampling 8-Bit Serial I/O A/D Converters
PDF  28 Pages
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Fabricante Electrônico  LINER [Linear Technology]
Página de início  http://www.linear.com
Logo LINER - Linear Technology

LTC1098AI Folha de dados(HTML) 28 Page - Linear Technology

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LTC1096/LTC1096L
LTC1098/LTC1098L
© LINEAR TECHNOLOGY CORPORATION 1994
10968fb LT/TP 0397 5K REV B • PRINTED IN USA
APPLICATI
TYPICAL
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417q (408)432-1900
FAX: (408) 434-0507qTELEX: 499-3977q www.linear-tech.com
RELATED PARTS
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
70
µA from the battery it monitors. The battery current is
sensed with the 0.02
Ω 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 70
µA 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 70
µA from a 3V Battery
–
+
750k
0.1
µF
0.02
Ω FOR 2A FULL SCALE
0.2
Ω 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
0.1
µF
+
–
3V TO 6V
TO
µP
–
+
1/2 LT1178
LTC1096/8 • F17



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