LTC2369-18 Datasheet, PDF (4/24 Pages) Linear Technology – 18-Bit, 1.6Msps, Pseudo-Differential Unipolar SAR

LTC2369-18
REFERENCE INPUT The l denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at T_A = 25°C. (Note 4)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
V_REF
Reference Voltage
I_REF
Reference Input Current
(Note 5)
(Note 9)
l 2.5
5.1
V
l
0.85
1.1
mA
DIGITAL INPUTS AND DIGITAL OUTPUTS The l denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T_A = 25°C. (Note 4)
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
POWER REQUIREMENTS The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T_A = 25°C. (Note 4)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
V_DD
OV_DD
I_VDD
I_OVDD
I_PD
I_PD
Supply Voltage
Supply Voltage
Supply Current
Supply Current
Power Down Mode
Power Down Mode
l 2.375
2.5
2.625
V
l 1.71
5.25
V
1.6Msps Sample Rate
l
1.6Msps Sample Rate (C_L = 20pF)
Conversion Done (I_VDD + I_OVDD + I_REF, V_REF > 2V)
l
Conversion Done (I_VDD + I_OVDD + I_REF, V_REF > 2V, H-Grade) l
7.2
8.6
mA
0.7
mA
0.9
90
μA
0.9
140
μA
P_D
Power Dissipation
1.6Msps Sample Rate
Power Down Mode
Conversion Done (I_VDD + I_OVDD + I_REF, V_REF > 2V)
Power Down Mode
Conversion Done (I_VDD + I_OVDD + I_REF, V_REF > 2V, H-Grade)
18
21.5
mW
2.25
225
μW
2.25
315
μW
ADC TIMING CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. (Note 4)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
f_SMPL
Maximum Sampling Frequency
l
1.6
Msps
t_CONV
Conversion Time
l 360
412
ns
t_ACQ
Acquisition Time
t_ACQ = t_CYC – t_CONV – t_BUSYLH (Note 10) l 200
ns
t_CYC
Time Between Conversions
l 625
ns
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
t_SCKH
SCK High Time
l
4
ns
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