Техническая Спецификация для Linear Technology LTC2378-20, 20-Bit, 1Msps, SAR ADC with 104dB SNR. Req DC590 or DC890 DC1925A-A DC1925A-A
Модели
DC1925A-A
LTC2378-20
4
237820f
aDc TiMing characTerisTics
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
f
SMPL
Maximum Sampling Frequency
l
1
Msps
t
CONV
Conversion Time
l
615
675
ns
t
ACQ
Acquisition Time
t
ACQ
= t
CYC
– t
CONV
– t
BUSYLH
(Note 10)
l
312
ns
t
CYC
Time Between Conversions
l
1
µs
t
CNVH
CNV High Time
l
20
ns
t
BUSYLH
CNV
↑ to BUSY Delay
C
L
= 20pF
l
13
ns
t
CNVL
Minimum Low Time for CNV
(Note 11)
l
20
ns
t
QUIET
SCK Quiet Time from CNV
↑
(Note 10)
l
20
ns
t
SCK
SCK Period
(Notes 11, 12)
l
10
ns
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)
power requireMenTs
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
DD
Supply Voltage
l
2.375
2.5
2.625
V
OV
DD
Supply Voltage
l
1.71
5.25
V
I
VDD
I
OVDD
I
PD
Supply Current
Supply Current
Power Down Mode
1Msps Sample Rate
1Msps Sample Rate (C
L
= 20pF)
Conversion Done (I
VDD
+ I
OVDD
+ I
REF
)
l
l
8.4
0.2
1
10
90
mA
mA
µA
P
D
Power Dissipation
Power Down Mode
1Msps Sample Rate
Conversion Done (I
VDD
+ I
OVDD
+ I
REF
)
21
2.5
25
225
mW
µW
The
l
denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 4)
reFerence inpuT
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
REF
Reference Voltage
(Note 5)
l
2.5
5.1
V
I
REF
Reference Input Current
(Note 9)
l
0.94
1.1
mA
V
IHDGC
High Level Input Voltage REF/DGC Pin
l
0.8V
REF
V
V
ILDGC
Low Level Input Voltage REF/DGC Pin
l
0.2V
REF
V
The
l
denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at T
A
= 25°C. (Note 4)
DigiTal inpuTs anD DigiTal ouTpuTs
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
IH
High Level Input Voltage
l
0.8 • OV
DD
V
V
IL
Low Level Input Voltage
l
0.2 • OV
DD
V
I
IN
Digital Input Current
V
IN
= 0V to OV
DD
l
–10
10
µA
C
IN
Digital Input Capacitance
5
pF
V
OH
High Level Output Voltage
I
O
= –500µA
l
OV
DD
–
0.2
V
V
OL
Low Level Output Voltage
I
O
= 500µA
l
0.2
V
I
OZ
Hi-Z Output Leakage Current
V
OUT
= 0V to OV
DD
l
–10
10
µA
I
SOURCE
Output Source Current
V
OUT
= 0V
–10
mA
I
SINK
Output Sink Current
V
OUT
= OV
DD
10
mA
The
l
denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)