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Linear Technology LTC2377-18 with LTC6655-5/LT6350: 18-Bit, 500ksps, SAR ADC with 102dB SNR. Req DC718 or DC590 DC1783A- DC1783A-G Fiche De Données

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DC1783A-G
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LTC2377-18
4
237718f
ADC TIMING CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
f
SMPL
Maximum Sampling Frequency
l
500
ksps
t
CONV
Conversion Time  
l
1
1.5
μs
t
ACQ
Acquisition Time
t
ACQ
 = t
CYC
 – t
HOLD 
(Note 10)
l
1.460
μs
t
HOLD
Maximum Time Between Acquisitions
l
540
ns
t
CYC
Time Between Conversions
l
2
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
 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
I
PD
Supply Current
Supply Current
Power Down Mode
Power Down Mode
500ksps Sample Rate
500ksps Sample Rate (C
L
 = 20pF)
Conversion Done (I
VDD
 + I
OVDD
 + I
REF
)
Conversion Done (I
VDD
 + I
OVDD
 + I
REF
, H-Grade)
l
l
l
2.7
0.1
0.9
0.9
3.2
90
140
mA
mA
μA
μA
P
D
Power Dissipation
Power Down Mode
Power Down Mode
500ksps Sample Rate
Conversion Done (I
VDD
 + I
OVDD
 + I
REF
)
Conversion Done (I
VDD
 + I
OVDD
 + I
REF
, H-Grade)
6.75
2.25
2.25
8
225
315
mW
μW
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
0.32
0.4
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)