LTC1857/LTC1858/LTC1859
3
185789fa
The
l denotes the specications which
apply over the full operating temperature range, otherwise specications are at TA = 25°C. MUXOUT connected to ADC inputs. (Notes 5, 6)
CONVERTER AND MULTPLEXER CHARACTERISTICS
PARAMETER
CONDITIONS
LTC1857
LTC1858
LTC1859
UNITS
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
Resolution
l
12
14
16
Bits
No Missing Codes
l
12
14
15
Bits
Transition Noise
0.06
0.26
1
LSBRMS
Integral Linearity Error
(Notes 7, 15)
l
±1
±1.5
±3
LSB
Differential Linearity Error
(Note 15)
l
–1
1
–1
1.5
–2
4
LSB
Bipolar Zero Error
(Note 8)
l
±9
±17
±28
LSB
Bipolar Zero Error Drift
±0.1
ppm/°C
Bipolar Zero Error Match
±4
±6
±10
LSB
Unipolar Zero Error
(Note 8)
l
±6
±15
±25
LSB
Unipolar Zero Error Drift
±1
ppm/°C
Unipolar Zero Error Match
±1.2
±2
±8
LSB
Bipolar Full-Scale Error
External Reference (Note 11)
Internal Reference (Note 11)
l
±0.35
±0.45
±0.15
±0.4
±0.1
±0.4
%
Bipolar Full-Scale Error Drift
External Reference
Internal Reference
±2.5
±7
±2.5
±7
±2.5
±7
ppm/°C
Bipolar Full-Scale Error Match
±5
±10
±15
LSB
Unipolar Full-Scale Error
External Reference (Note 11)
Internal Reference (Note 11)
l
±0.45
±0.75
±0.25
±0.85
±0.2
±0.75
%
Unipolar Full-Scale Error Drift
External Reference
Internal Reference
±2.5
±7
±2.5
±7
±2.5
±7
ppm/°C
Unipolar Full-Scale Error Match
±5
±12
±15
LSB
Input Common Mode Range
Unipolar Mode
Bipolar Mode
l
0 to 10
±10
0 to 10
±10
0 to 10
±10
V
Input Common Mode Rejection Ratio
96
dB
The
l denotes the specications which apply over the full operating temperature range, otherwise
specications are at TA = 25°C. (Note 5)
ANALOG INPUT
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Analog Input Range
CH0 to CH7, COM
0 to 5, 0 to 10
±5, ±10
V
ADC+, ADC– (Note 3)
0 to 2.048
0 to 4.096
ADC– ±1.024
ADC– ±2.048
V
Impedance
CH0 to CH7, COM
Unipolar
Bipolar
42
31
kΩ
MUXOUT+, MUXOUT–
Unipolar
Bipolar
10
5
kΩ
ADC+, ADC–
Hi-Z
kΩ
Capacitance
CH0 to CH7, COM
5
pF
Sample Mode ADC+, ADC–
0V to 2.048V, ±1.024V
0V to 4.096V, ±2.048V
24
12
pF
Hold Mode ADC+, ADC–
4pF
Input Leakage Current
ADC+, ADC–, CONVST = Low
l
±1
μA