LTC2449_15 Datasheet, PDF (4/28 Pages) Linear Technology – 24-Bit High Speed 8-/16-Channel ADCs with Selectable Speed/Resolution

LTC2444/LTC2445/
LTC2448/LTC2449
DIGITAL I PUTS A D DIGITAL OUTPUTS _{The ● denotes 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
V_IL
Low Level Input Voltage
CS, F_O
V_IH
High Level Input Voltage
SCK
4.5V ≤ V_CC ≤ 5.5V
4.5V ≤ V_CC ≤ 5.5V
4.5V ≤ V_CC ≤ 5.5V (Note 8)
●
2.5
●
●
2.5
V
0.8
V
V
V_IL
Low Level Input Voltage
SCK
4.5V ≤ V_CC ≤ 5.5V (Note 8)
●
0.8
V
I_IN
Digital Input Current
CS, F_O, EXT, SOI
I_IN
Digital Input Current
SCK
0V ≤ V_IN ≤ V_CC
0V ≤ V_IN ≤ V_CC (Note 8)
●
–10
●
–10
10
µA
10
µA
C_IN
Digital Input Capacitance
CS, F_O
C_IN
Digital Input Capacitance
SCK
(Note 8)
10
pF
10
pF
V_OH
High Level Output Voltage
I_O = –800µA
● V_CC – 0.5V
V
SDO, BUSY
V_OL
Low Level Output Voltage
I_O = 1.6mA
●
SDO, BUSY
0.4V
V
V_OH
High Level Output Voltage
I_O = –800µA (Note 9)
● V_CC – 0.5V
V
SCK
V_OL
Low Level Output Voltage
I_O = 1.6mA (Note 9)
●
SCK
0.4V
V
I_OZ
Hi-Z Output Leakage
SDO
●
–10
10
µA
POWER REQUIRE E TS _{The ● denotes 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_CC
Supply Voltage
●
4.5
5.5
V
I_CC
Supply Current
Conversion Mode
CS = 0V (Note 7)
●
8
11
mA
Sleep Mode
CS = V_CC (Note 7)
●
8
30
µA
WU
TI I G CHARACTERISTICS _{The ● denotes 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
f_EOSC
t_HEO
t_LEO
t_CONV
External Oscillator Frequency Range
External Oscillator High Period
External Oscillator Low Period
Conversion Time
OSR = 256 (SDI = 0)
OSR = 32768 (SDI = 1)
●
0.1
●
25
●
25
●
0.99
●
126
20
MHz
10000
ns
10000
ns
1.13
1.33
ms
145
170
ms
40 • OSR +170
External Oscillator (Notes 10, 13)
●
f_EOSC (kHz)
ms
f_ISCK
Internal SCK Frequency
Internal Oscillator (Note 9)
●
0.8
0.9
1
MHz
External Oscillator (Notes 9, 10)
f_EOSC/10
Hz
2444589fb
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