LTC1867CGN Просмотр технического описания (PDF) - Linear Technology
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LTC1867CGN Datasheet PDF : 18 Pages
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APPLICATIONS INFORMATION
LTC1863/LTC1867
CS/CONV
SCK
tACQ
NOT NEEDED FOR LTC1863
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
DON'T CARE
SDI
SDO
(LTC1863)
SDO
(LTC1867)
DON'T CARE
tCONV
Hi-Z
tCONV
Hi-Z
SD 0S S1 S0 COM UNI SLP
DON'T CARE
MSB = D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
MSB = D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
1867 F07
Figure 7. Example 2, CS/CONV Starts a Conversion With Short Active HIGH Pulse.
With CS/CONV Returning LOW Before the Conversion, the ADC Remains Powered Up.
011...111
011...110
BIPOLAR
ZERO
000...001
000...000
111...111
111...110
100...001
100...000
–FS/2
FS = 4.096
1LSB = FS/2n
1LSB = (LTC1863) = 1mV
1LSB = (LTC1867) = 62.5µV
–1 0V 1
LSB LSB
INPUT VOLTAGE (V)
FS/2 – 1LSB
1867 F08
Figure 8. LTC1863/LTC1867 Bipolar Transfer
Characteristics (Two’s Complement)
111...111
111...110
100...001
100...000
011...111
011...110
UNIPOLAR
ZERO
000...001
000...000
FS = 4.096
1LSB = FS/2n
1LSB = (LTC1863) = 1mV
1LSB = (LTC1867) = 62.5µV
0V
FS – 1LSB
INPUT VOLTAGE (V)
1867 F09
Figure 9. LTC1863/LTC1867 Unipolar Transfer
Characteristics (Straight Binary)
For more information www.linear.com/LTC1863
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