LTC2494_15 Datasheet, PDF (4/38 Pages) Linear Technology – 16-Bit 8-/16-Channel ADC with PGA and Easy Drive Input Current Cancellation

LTC2494
Analog Input and Reference The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. (Note 3)
SYMBOL PARAMETER
IN⁺
Absolute/Common Mode IN⁺ Voltage
(IN⁺ Corresponds to the Selected Positive Input Channel)
IN^–
Absolute/Common Mode IN^– Voltage
(IN^– Corresponds to the Selected Negative Input Channel or COM)
V_IN
Input Voltage Range (IN⁺ – IN^–)
FS
Full-Scale of the Input (IN⁺ – IN^–)
LSB
Least Significant Bit of the Output Code
REF⁺
Absolute/Common Mode REF⁺ Voltage
REF^–
Absolute/Common Mode REF^– Voltage
V_REF
C_S(IN+)
C_S(IN–)
Reference Voltage Range (REF⁺ – REF^–)
IN⁺ Sampling Capacitance
IN^– Sampling Capacitance
C_S(VREF)
V_REF Sampling Capacitance
I_{DC_LEAK(IN+)} IN⁺ DC Leakage Current
I_{DC_LEAK(IN–)} IN^– DC Leakage Current
I_{DC_LEAK(REF+)} REF⁺ DC Leakage Current
I_{DC_LEAK(REF–)} REF^– DC Leakage Current
t_OPEN
MUX Break-Before-Make
QIRR
MUX Off Isolation
CONDITIONS
Differential/Single-Ended
Differential/Single-Ended
Sleep Mode, IN⁺ = GND
Sleep Mode, IN^– = GND
Sleep Mode, REF⁺ = V_CC
Sleep Mode, REF^– = GND
V_IN = 2V_P-P DC to 1.8MHz
MIN TYP MAX UNITS
GND – 0.3V
V_CC + 0.3V
V
GND – 0.3V
V_CC + 0.3V
V
l
–FS
+FS
V
l 0.5V_REF/Gain
V
l FS/2¹⁶
l
0.1
l GND
V_CC
V
REF⁺ – 0.1V
V
l
0.1
V_CC
V
11
pF
11
pF
11
pF
l
–10
1
10
nA
l
–10
1
10
nA
l –100
1
100
nA
l –100
1
100
nA
50
ns
120
dB
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 3)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V_IH
High Level Input Voltage (CS, f_O, SDI)
2.7V ≤ V_CC ≤ 5.5V (Note 18)
l V_CC – 0.5
V
V_IL
Low Level Input Voltage (CS, f_O, SDI)
2.7V ≤ V_CC ≤ 5.5V
l
0.5
V
V_IH
High Level Input Voltage (SCK)
2.7V ≤ V_CC ≤ 5.5V (Notes 10, 15)
l V_CC – 0.5
V
V_IL
Low Level Input Voltage (SCK)
2.7V ≤ V_CC ≤ 5.5V (Notes 10, 15) l
0.5
V
I_IN
Digital Input Current (CS, f_O, SDI)
0V ≤ V_IN ≤ V_CC
l –10
10
µA
I_IN
Digital Input Current (SCK)
0V ≤ V_IN ≤ V_CC (Notes 10, 15)
l –10
10
µA
C_IN
Digital Input Capacitance (CS, f_O, SDI)
10
pF
C_IN
Digital Input Capacitance (SCK)
(Notes 10, 15)
10
pF
V_OH
High Level Output Voltage (SDO)
I_O = –800µA
l V_CC – 0.5
V
V_OL
Low Level Output Voltage (SDO)
I_O = 1.6mA
l
0.4
V
V_OH
High Level Output Voltage (SCK)
I_O = –800µA (Notes 10, 17)
l V_CC – 0.5
V
V_OL
Low Level Output Voltage (SCK)
I_O = 1.6mA (Notes 10, 17)
l
0.4
V
I_OZ
Hi-Z Output Leakage (SDO)
l –10
10
µA
Power Requirements The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T_A = 25°C. (Note 3)
SYMBOL
V_CC
I_CC
PARAMETER
Supply Voltage
Supply Current
CONDITIONS
Conversion Current (Note 12)
Temperature Measurement (Note 12)
Sleep Mode (Note 12)
MIN
TYP
MAX
l 2.7
5.5
l
160
275
l
200
300
l
1
2
UNITS
V
µA
µA
µA
2494fe
4
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