LTC1274CS Datasheet

  • LTC1274CS

  • Linear Technology [12-Bit, 10mW, 100ksps ADCs with 1uA Shut...

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LTC1274/LTC1277
DIGITAL I PUTS A D DIGITAL OUTPUTS
SYMBOL PARAMETER
I
OZ
C
OZ
I
SOURCE
I
SINK
High-Z Output Leakage D11 to D0/8
High-Z Output Capacitance D11 to D0/8
Output Source Current
Output Sink Current
CONDITIONS
V
OUT
= 0V to V
DD
, CS High
CS High (Note 10)
V
OUT
= 0V
V
OUT
= V
DD
q
q
POWER REQUIRE E TS
SYMBOL PARAMETER
V
DD
V
LOGIC
V
SS
I
DD
Positive Supply Voltage (Notes 11, 12)
Logic Supply (Notes 11,12)
Negative Supply Voltage (Note 11)
Positive Supply Current
I
SS
P
DISS
Negative Supply Current
Power Dissipation
TI I G CHARACTERISTICS
SYMBOL
f
SAMPLE(MAX)
t
CONV
t
ACQ
t
1
t
2
t
3
t
4
t
5
t
6
t
7
t
8
t
9
PARAMETER
Maximum Sampling Frequency
Conversion Time
Acquisition Time
CS鈫?to RD鈫?Setup Time
CS鈫?to CONVST鈫?Setup Time
NAP鈫?to CONVST鈫?Wake-Up Time
CONVST Low Time
CONVST鈫?to BUSY鈫?Delay
Data Ready Before BUSY鈫?/div>
Delay Between Conversions
Wait Time RD鈫?After BUSY鈫?/div>
Data Access Time After RD鈫?/div>
t
10
t
11
t
12
t
13
t
14
t
15
Bus Relinquish Time
RD Low Time
CONVST High Time
Aperture Delay of Sample-and-Hold
SLEEP鈫?to REFRDY鈫?Wake-Up Time 10碌F Bypass at V
REF
Pin
4.7碌F Bypass at V
REF
Pin
HBEN鈫?to High Byte Data Valid
C
L
= 100pF (LTC1277 Only)
q
4
U W
U
U
(Note 5)
MIN
TYP
MAX
卤10
15
鈥?10
10
UNITS
碌A
pF
mA
mA
(Note 5)
CONDITIONS
Unipolar and Bipolar Mode
Unipolar and Bipolar Mode (LTC1277)
Bipolar Mode Only
f
SAMPLE
= 100ksps
NAP = 0V (LTC1277 Only)
SLEEP = 0V
f
SAMPLE
= 100ksps, Bipolar Mode Only
SLEEP = 0V
f
SAMPLE
= 100ksps
NAP = 0V (LTC1277 Only)
SLEEP = 0V (Unipolar/Bipolar)
q
q
q
q
q
q
q
q
MIN
4.75
TYP
2.7 to 5.25
MAX
5.25
鈥?5.25
UNITS
V
V
V
mA
碌A
碌A
碌A
碌A
mW
mW
碌W
鈥?2.45
2
180
0.3
40
0.3
10
0.9
4
320
5
70
5
20
1.8
25/50
UW
(Note 5) See Figures 13 to 17.
MIN
q
q
q
CONDITIONS
(Note 11)
TYP
6
0.35
MAX
8
2
UNITS
ksps
碌s
碌s
ns
ns
100
(Note 10)
(Note 10)
(LTC1277 Only) (Note 11)
(Note 13)
C
L
= 100pF
C
L
= 100pF
(Note 11)
(Note 10)
C
L
= 20pF (Note 10)
q
q
0
30
620
40
70
20
鈥?20
50
110
140
125
170
90
100
65
0.35
2
150
ns
ns
ns
ns
碌s
ns
ns
ns
ns
ns
ns
ns
ns
ns
q
q
q
q
q
q
C
L
= 100pF
q
65
20
20
t
9
40
35
4.2
3.3
35
60
C
L
= 100pF
q
(Note 10)
(Notes 10, 13)
q
q
ns
ms
ms
100
ns

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