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LTC1274IS Datasheet(PDF) 4 Page - Linear Technology

Part # LTC1274IS
Description  12-Bit, 10mW, 100ksps ADCs with 1uA Shutdown
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1274IS Datasheet(HTML) 4 Page - Linear Technology

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LTC1274/LTC1277
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IOZ
High-Z Output Leakage D11 to D0/8
VOUT = 0V to VDD, CS High
q
±10
µA
COZ
High-Z Output Capacitance D11 to D0/8
CS High (Note 10)
q
15
pF
ISOURCE
Output Source Current
VOUT = 0V
– 10
mA
ISINK
Output Sink Current
VOUT = VDD
10
mA
(Note 5)
DIGITAL I PUTS A D DIGITAL OUTPUTS
(Note 5)
POWER REQUIRE E TS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VDD
Positive Supply Voltage (Notes 11, 12)
Unipolar and Bipolar Mode
4.75
5.25
V
VLOGIC
Logic Supply (Notes 11,12)
Unipolar and Bipolar Mode (LTC1277)
2.7 to 5.25
V
VSS
Negative Supply Voltage (Note 11)
Bipolar Mode Only
– 2.45
– 5.25
V
IDD
Positive Supply Current
fSAMPLE = 100ksps
q
24
mA
NAP = 0V (LTC1277 Only)
q
180
320
µA
SLEEP = 0V
q
0.3
5
µA
ISS
Negative Supply Current
fSAMPLE = 100ksps, Bipolar Mode Only
q
40
70
µA
SLEEP = 0V
q
0.3
5
µA
PDISS
Power Dissipation
fSAMPLE = 100ksps
q
10
20
mW
NAP = 0V (LTC1277 Only)
q
0.9
1.8
mW
SLEEP = 0V (Unipolar/Bipolar)
q
25/50
µW
(Note 5) See Figures 13 to 17.
TI I G CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
fSAMPLE(MAX)
Maximum Sampling Frequency
(Note 11)
q
100
ksps
tCONV
Conversion Time
q
68
µs
tACQ
Acquisition Time
q
0.35
2
µs
t1
CS
↓ to RD↓ Setup Time
(Note 10)
q
0ns
t2
CS
↓ to CONVST↓ Setup Time
(Note 10)
q
30
ns
t3
NAP
↑ to CONVST↓ Wake-Up Time
(LTC1277 Only) (Note 11)
620
ns
t4
CONVST Low Time
(Note 13)
q
40
ns
t5
CONVST
↓ to BUSY↓ Delay
CL = 100pF
q
70
150
ns
t6
Data Ready Before BUSY
↑
CL = 100pF
q
20
65
ns
t7
Delay Between Conversions
(Note 11)
q
0.35
2
µs
t8
Wait Time RD
↓ After BUSY↑
(Note 10)
q
–20
ns
t9
Data Access Time After RD
↓
CL = 20pF (Note 10)
50
110
ns
q
140
ns
CL = 100pF
65
125
ns
q
170
ns
t10
Bus Relinquish Time
CL = 100pF
20
60
90
ns
q
20
100
ns
t11
RD Low Time
(Note 10)
q
t9
ns
t12
CONVST High Time
(Notes 10, 13)
q
40
ns
t13
Aperture Delay of Sample-and-Hold
35
ns
t14
SLEEP
↑ to REFRDY↑ Wake-Up Time 10µF Bypass at VREF Pin
4.2
ms
4.7
µF Bypass at VREF Pin
3.3
ms
t15
HBEN
↑ to High Byte Data Valid
CL = 100pF (LTC1277 Only)
q
35
100
ns


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