LTC1098IS8 Ver la hoja de datos (PDF) - Linear Technology
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LTC1098IS8 Datasheet PDF : 32 Pages
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LTC1096/LTC1096L
LTC1098/LTC1098L
TYPICAL APPLICATION
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.
0.1μF
3V TO 6V
0.1μF
750k
24.9k
L
O
A
0.02Ω FOR 2A FULL SCALE
D
0.2Ω FOR 0.2A FULL SCALE
+
1/2 LT1178
–
73.2k 470k
CS
+
– LTC1096
GND
VCC
CLK
DOUT
VREF
LT1004-1.2
20M
+
1/2 LT1178
470k –
TO μP
LO BATTERY
10968 F17
Figure 17. This 0A to 2A Battery Current Monitor Draws Only 70μA from a 3V Battery
RELATED PARTS
PART NUMBER
LTC1196/LTC1198
LTC1286/LTC1298
LTC1285/LTC1298
LTC1400
LTC1594/LTC1598
LTC1594L/LTC1598L
DESCRIPTION
8-Pin SO, 1Msps, 8-Bit ADCs
8-Pin SO, 5V Micropower, 12-Bit ADCs
8-Pin SO, 3V Micropower, 12-Bit ADCs
5V High Speed,Serial 12-Bit ADC
4- and 8-Channel, 5V Micropower, 12-Bit ADCs
4- and 8-Channel, 3V Micropower, 12-Bit ADCs
COMMENTS
Low Power, Small Size, Low Cost
1- or 2-Channel, Auto Shutdown
1- or 2-Channel, Auto Shutdown
400ksps, Complete with VREF, CLK, Sample-and-Hold
Low Power, Small Size, Low Cost
Low Power, Small Size, Low Cost
32 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
10968fc
LT 0708 REV C • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1994
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