LTC1857/LTC1858/LTC1859
A ALOG I PUT The ● denotes the specifications which apply over the full operating temperature range, otherwise
U
U
specifications are at TA = 25°C. (Note 5)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Analog Input Range
CH0 to CH7, COM
0 to 5, 0 to 10
V
V
±5, ±10
+
–
ADC , ADC (Note 3)
0 to 2.048
0 to 4.096
V
V
V
V
–
ADC ±1.024
–
ADC ±2.048
Impedance
Capacitance
CH0 to CH7, COM
Unipolar
Bipolar
42
31
kΩ
kΩ
+
–
MUXOUT , MUXOUT
Unipolar
Bipolar
10
5
kΩ
kΩ
+
–
ADC , ADC
CH0 to CH7, COM
Hi-Z
5
kΩ
pF
+
–
Sample Mode ADC , ADC
0V to 2.048V, ±1.024V
0V to 4.096V, ±2.048V
24
12
pF
pF
+
–
Hold Mode ADC , ADC
4
pF
+
–
Input Leakage Current
ADC , ADC , CONVST = Low
●
±1
µA
U W
DY A IC ACCURACY The ● denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at TA = 25°C. MUXOUT connected to ADC inputs. (Notes 5 and 12)
LTC1857
MIN TYP MAX MIN
LTC1858
TYP MAX MIN
LTC1859
TYP MAX
SYMBOL PARAMETER
CONDITIONS
UNITS
dB
S/(N + D) Signal-to-(Noise + Distortion) Ratio 1kHz Input Signal
74
83
87
THD
Total Harmonic Distortion
1kHz Input Signal,
First Five Harmonics
–101
–101
–101
dB
Peak Harmonic or Spurious Noise
Channel-to-Channel Isolation
–3dB Input Bandwidth
Aperture Delay
1kHz Input Signal
1kHz Input Signal
–103
–120
1
–103
–120
1
–103
–120
1
dB
dB
MHz
ns
–70
60
–70
60
–70
60
Aperture Jitter
ps
Transient Response
Full-Scale Step
(Note 9)
4
4
4
µs
Overvoltage Recovery
(Note 13)
150
150
150
ns
185789f
3
Linear Systems [ Linear Systems ]
