|
LTC1274 Datasheet, PDF (4/20 Pages) Linear Technology – 12-Bit, 10mW, 100ksps ADCs with 1uA Shutdown | |||
|
◁ |
LTC1274/LTC1277
U
U
DIGITAL I PUTS A D DIGITAL OUTPUTS (Note 5)
SYMBOL PARAMETER
CONDITIONS
IOZ
High-Z Output Leakage D11 to D0/8
VOUT = 0V to VDD, CS High
COZ
High-Z Output Capacitance D11 to D0/8 CS High (Note 10)
ISOURCE Output Source Current
VOUT = 0V
ISINK
Output Sink Current
VOUT = VDD
WU
POWER REQUIRE E TS (Note 5)
SYMBOL PARAMETER
CONDITIONS
VDD
VLOGIC
VSS
IDD
Positive Supply Voltage (Notes 11, 12)
Logic Supply (Notes 11,12)
Negative Supply Voltage (Note 11)
Positive Supply Current
Unipolar and Bipolar Mode
Unipolar and Bipolar Mode (LTC1277)
Bipolar Mode Only
fSAMPLE = 100ksps
NAP = 0V (LTC1277 Only)
SLEEP = 0V
ISS
Negative Supply Current
fSAMPLE = 100ksps, Bipolar Mode Only
SLEEP = 0V
PDISS Power Dissipation
fSAMPLE = 100ksps
NAP = 0V (LTC1277 Only)
SLEEP = 0V (Unipolar/Bipolar)
WU
TI I G CHARACTERISTICS (Note 5) See Figures 13 to 17.
SYMBOL
fSAMPLE(MAX)
tCONV
tACQ
t1
t2
t3
t4
t5
t6
t7
t8
t9
PARAMETER
Maximum Sampling Frequency
Conversion Time
Acquisition Time
CSâ to RDâ Setup Time
CSâ to CONVSTâ Setup Time
NAPâ to CONVSTâ Wake-Up Time
CONVST Low Time
CONVSTâ to BUSYâ Delay
Data Ready Before BUSYâ
Delay Between Conversions
Wait Time RDâ After BUSYâ
Data Access Time After RDâ
CONDITIONS
(Note 11)
(Note 10)
(Note 10)
(LTC1277 Only) (Note 11)
(Note 13)
CL = 100pF
CL = 100pF
(Note 11)
(Note 10)
CL = 20pF (Note 10)
CL = 100pF
t10
Bus Relinquish Time
CL = 100pF
t11
RD Low Time
(Note 10)
t12
CONVST High Time
(Notes 10, 13)
t13
Aperture Delay of Sample-and-Hold
t14
SLEEPâ to REFRDYâ Wake-Up Time 10µF Bypass at VREF Pin
4.7µF Bypass at VREF Pin
t15
HBENâ to High Byte Data Valid
CL = 100pF (LTC1277 Only)
4
MIN
q
q
TYP MAX UNITS
±10
µA
15
pF
â 10
mA
10
mA
MIN TYP MAX
4.75
5.25
2.7 to 5.25
â 2.45
â 5.25
q
2
4
q
180
320
q
0.3
5
q
40
70
q
0.3
5
q
10
20
q
0.9
1.8
q
25/50
UNITS
V
V
V
mA
µA
µA
µA
µA
mW
mW
µW
MIN TYP MAX UNITS
q 100
ksps
q
6
8
µs
q
0.35
2
µs
q0
ns
q 30
ns
620
ns
q 40
ns
q
70
150
ns
q 20
65
ns
q
0.35
2
µs
q â 20
ns
50
110
ns
q
140
ns
65
125
ns
q
170
ns
20
60
90
ns
q 20
100
ns
q t9
ns
q 40
ns
35
ns
4.2
ms
3.3
ms
q
35
100
ns
|
▷ |