LTC1274 Linear Technology, LTC1274 Datasheet - Page 4

• Manufacturer Part Number: LTC1274
• Description: 12-Bit/ 10mW/ 100ksps ADCs with 1uA Shutdown
• Manufacturer: Linear Technology

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