
3
LTC2424/LTC2428
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input Voltage Range (Note 14) ● –0.125 • V
REF
1.125 • V
REF
V
V
REF
Reference Voltage Range ● 0.1 V
CC
V
C
S(IN)
Input Sampling Capacitance 1 pF
C
S(REF)
Reference Sampling Capacitance 1.5 pF
I
IN(LEAK)
Input Leakage Current CS = V
CC
● –100 1 100 nA
I
REF(LEAK)
Reference Leakage Current V
REF
= 2.5V, CS = V
CC
● –100 1 100 nA
I
IN(MUX)
On Channel Leakage Current V
S
= 2.5V (Note 15) ● ±20 nA
R
ON
MUX On-Resistance I
OUT
= 1mA, V
CC
= 2.7V ● 250 300 Ω
I
OUT
= 1mA, V
CC
= 5V ● 120 250 Ω
MUX ∆R
ON
vs Temperature 0.5 %/°C
∆R
ON
vs V
S
(Note 15) 20 %
I
S(OFF)
MUX Off Input Leakage Channel Off, V
S
= 2.5V ● ±20 nA
I
D(OFF)
MUX Off Output Leakage Channel Off, V
D
= 2.5V ● ±20 nA
t
OPEN
MUX Break-Before-Make Interval 290 ns
t
ON
Enable Turn-On Time V
S
= 1.5V, R
L
= 3.4k, C
L
= 15pF 490 ns
t
OFF
Enable Turn-Off Time V
S
= 1.5V, R
L
= 3.4k, C
L
= 15pF 190 ns
C
S(OFF)
Input Off Capacitance (MUX) 10 pF
C
D(OFF)
Output Off Capacitance (MUX) 10 pF
MUX OFF Isolation Channel-to-Channel DC 120 dB
at 1Hz 120 dB
at f
S
= 15,360Hz 120 dB
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 3)
A ALOG I PUT A D REFERE CE
UU
U
U
PARAMETER CONDITIONS MIN TYP MAX UNITS
Total Unadjusted Error V
REF
= 2.5V 8 ppm of V
REF
V
REF
= 5V 16 ppm of V
REF
Output Noise V
IN
= 0V, V
REF
= 5V (Note 13) 6 µV
RMS
Output Noise (Fast Mode) V
REF
= 5V, 100 Samples/Second, f
O
= 2.051MHz 20 µV
RMS
Normal Mode Rejection 60Hz ±2% (Note 7) ● 110 130 dB
Normal Mode Rejection 50Hz ±2% (Note 8) ● 110 130 dB
Power Supply Rejection, DC V
REF
= 2.5V, V
IN
= 0V 100 dB
Power Supply Rejection, 60Hz ±2% V
REF
= 2.5V, V
IN
= 0V, (Notes 7, 16) 110 dB
Power Supply Rejection, 50Hz ±2% V
REF
= 2.5V, V
IN
= 0V, (Notes 8, 16) 110 dB
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Notes 3, 4)
CONVERTER CHARACTERISTICS
U
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