Consult ADI Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
IN0–
IN0+
GND
V
CC
V
EE
GND
REFIN
GND
REFBUF
PD
LVDS/CMOS
CNV
13
14
15
16
17
18
19
20
21
22
23
24
2
235718f
For more information
www.linear.com/LTC2357-18
LTC2357-18
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 6)
SYMBOL
V
IN
+
V
IN
–
PARAMETER
Absolute Input Range
(IN0
+
to IN3
+
)
Absolute Input Range
(IN0
–
to IN3
–
)
CONDITIONS
(Note 7)
(Note 7)
SoftSpan 7: ±2.5 • V
REFBUF
Range (Note 7)
SoftSpan 6: ±2.5 • V
REFBUF
/1.024 Range (Note 7)
SoftSpan 5: 0V to 2.5 • V
REFBUF
Range (Note 7)
SoftSpan 4: 0V to 2.5 • V
REFBUF
/1.024 Range (Note 7)
SoftSpan 3: ±1.25 • V
REFBUF
Range (Note 7)
SoftSpan 2: ±1.25 • V
REFBUF
/1.024 Range (Note 7)
SoftSpan 1: 0V to 1.25 • V
REFBUF
Range (Note 7)
(Note 7)
(Note 8)
V
IN
+ > V
CC
, V
IN
– > V
CC
(Note 8)
V
IN
+ < V
EE
, V
IN
– < V
EE
(Note 8)
C-Grade and I-Grade
H-Grade
V
IN+
= V
IN–
V
IN+
= V
IN–
, C-Grade and I-Grade
V
IN+
= V
IN–
, H-Grade
l
l
ELECTRICAL CHARACTERISTICS
MIN
V
EE
+ 4
V
EE
+ 4
TYP
MAX
V
CC
– 4
V
CC
– 4
2.5 • V
REFBUF
2.5 • V
REFBUF
/1.024
2.5 • V
REFBUF
2.5 • V
REFBUF
/1.024
1.25 • V
REFBUF
1.25 • V
REFBUF
/1.024
1.25 • V
REFBUF
V
CC
– 4
(V
CC
− V
EE
)
10
UNITS
V
V
V
V
V
V
V
V
V
V
V
mA
mA
pA
pA
nA
pA
pA
nA
GΩ
pF
dB
V
V
IN
+ – V
IN
– Input Differential
Voltage Range
l
–2.5 • V
REFBUF
l
–2.5 • V
REFBUF
/1.024
l
0
l
0
l
–1.25 • V
REFBUF
l
–1.25 • V
REFBUF
/1.024
l
0
l
l
l
l
l
l
l
l
V
CM
Input Common Mode
Voltage Range
V
EE
+ 4
−(V
CC
− V
EE
)
0
5
V
IN
+ – V
IN
– Input Differential
Overdrive Tolerance
I
OVERDRIVE
I
IN
I
IN+
– I
IN–
R
IN
C
IN
CMRR
V
IHCNV
V
ILCNV
I
INCNV
Input Overdrive
Current Tolerance
Analog Input Leakage
Current
Analog Input Leakage
Offset Current
500
12
100
1.2
–100
–1.2
±1
Analog Input Resistance For Each Pin
Analog Input
Capacitance
Input Common Mode
Rejection Ratio
CNV High Level Input
Voltage
CNV Low Level Input
Voltage
CNV Input Current
V
IN
= 0V to V
DD
V
IN
+ = V
IN
− = 18V
P-P
200Hz Sine
l
l
l
l
>1000
3
105
1.3
0.5
–10
10
128
V
μA
temperature range, otherwise specifications are at T
A
= 25°C. (Note 9)
SYMBOL
PARAMETER
Resolution
No Missing Codes
Transition Noise
CONDITIONS
CONVERTER CHARACTERISTICS
The
l
denotes the specifications which apply over the full operating
MIN
l
l
TYP
MAX
UNITS
Bits
Bits
18
18
1.4
2.8
2.1
4.2
SoftSpans 7 and 6: ±10.24V and ±10V Ranges
SoftSpans 5 and 4: 0V to 10.24V and 0V to 10V Ranges
SoftSpans 3 and 2: ±5.12V and ±5V Ranges
SoftSpan 1: 0V to 5.12V Range
SoftSpans 7 and 6: ±10.24V and ±10V Ranges (Note 10)
SoftSpans 5 and 4: 0V to 10.24V and 0V to 10V Ranges (Note 10)
SoftSpans 3 and 2: ±5.12V and ±5V Ranges (Note 10)
SoftSpan 1: 0V to 5.12V Range (Note 10)
l
l
l
l
l
LSB
RMS
LSB
RMS
LSB
RMS
LSB
RMS
3.5
5
4
6
0.9
LSB
LSB
LSB
LSB
LSB
235718f
INL
Integral Linearity Error
–3.5
–5
–4
–6
−0.9
±1
±1
±1.5
±1
±0.2
DNL
Differential Linearity Error (Note 11)
For more information
www.linear.com/LTC2357-18
3
LTC2357-18
temperature range, otherwise specifications are at T
A
= 25°C. (Note 9)
SYMBOL
ZSE
FSE
PARAMETER
Zero-Scale Error
Zero-Scale Error Drift
Full-Scale Error
Full-Scale Error Drift
V
REFBUF
= 4.096V (REFBUF Overdriven) (Note 12)
V
REFBUF
= 4.096V (REFBUF Overdriven) (Note 12)
l
CONVERTER CHARACTERISTICS
The
l
denotes the specifications which apply over the full operating
CONDITIONS
(Note 12)
l
MIN
−900
−0.1
TYP
±80
±4
±0.025
±2.5
MAX
900
0.1
UNITS
μV
μV/°C
%FS
ppm/°C
DYNAMIC ACCURACY
SYMBOL PARAMETER
SINAD
Signal-to-(Noise +
Distortion) Ratio
The
l
denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C. A
IN
= –1dBFS. (Notes 9, 13)
CONDITIONS
SoftSpans 7 and 6: ±10.24V and ±10V Ranges, f
IN
= 2kHz
SoftSpans 5 and 4: 0V to 10.24V and 0V to 10V Ranges, f
IN
= 2kHz
SoftSpans 3 and 2: ±5.12V and ±5V Ranges, f
IN
= 2kHz
SoftSpan 1: 0V to 5.12V Range, f
IN
= 2kHz
SoftSpans 7 and 6: ±10.24V and ±10V Ranges, f
IN
= 2kHz
SoftSpans 5 and 4: 0V to 10.24V and 0V to 10V Ranges, f
IN
= 2kHz
SoftSpans 3 and 2: ±5.12V and ±5V Ranges, f
IN
= 2kHz
SoftSpan 1: 0V to 5.12V Range, f
IN
= 2kHz
SoftSpans 7 and 6: ±10.24V and ±10V Ranges, f
IN
= 2kHz
SoftSpans 5 and 4: 0V to 10.24V and 0V to 10V Ranges, f
IN
= 2kHz
SoftSpans 3 and 2: ±5.12V and ±5V Ranges, f
IN
= 2kHz
SoftSpan 1: 0V to 5.12V Range, f
IN
= 2kHz
SoftSpans 7 and 6: ±10.24V and ±10V Ranges, f
IN
= 2kHz
SoftSpans 5 and 4: 0V to 10.24V and 0V to 10V Ranges, f
IN
= 2kHz
SoftSpans 3 and 2: ±5.12V and ±5V Ranges, f
IN
= 2kHz
SoftSpan 1: 0V to 5.12V Range, f
IN
= 2kHz
One Channel Converting 18V
P-P
200Hz Sine in ±10.24V Range,
Crosstalk to All Other Channels
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
MIN
92.7
86.9
89.3
83.6
92.8
87.0
89.5
83.6
TYP
96.2
90.3
92.5
86.6
96.4
90.4
92.5
86.6
–110
–111
–112
–113
MAX
UNITS
dB
dB
dB
dB
dB
dB
dB
dB
SNR
Signal-to-Noise Ratio
THD
Total Harmonic Distortion
–101
–99
–102
–99
dB
dB
dB
dB
dB
dB
dB
dB
dB
MHz
ns
ps
ps
RMS
ns
SFDR
Spurious Free Dynamic
Range
101
99
103
99
112
113
114
114
−109
6
1
150
3
Channel-to-Channel
Crosstalk
–3dB Input Bandwidth
Aperture Delay
Aperture Delay Matching
Aperture Jitter
Transient Response
Full-Scale Step, 0.005% Settling
420
operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 9)
SYMBOL
V
REFIN
PARAMETER
Internal Reference Output Voltage
Internal Reference Temperature Coefficient
Internal Reference Line Regulation
Internal Reference Output Impedance
V
REFIN
REFIN Voltage Range
REFIN Overdriven (Note 7)
(Note 14)
V
DD
= 4.75V to 5.25V
CONDITIONS
INTERNAL REFERENCE CHARACTERISTICS
The
l
denotes the specifications which apply over the full
MIN
2.043
l
TYP
2.048
5
0.1
20
MAX
2.053
20
UNITS
V
ppm/°C
mV/V
kΩ
1.25
2.2
V
4
235718f
For more information
www.linear.com/LTC2357-18
LTC2357-18
The
l
denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 9)
SYMBOL
V
REFBUF
PARAMETER
Reference Buffer Output Voltage
REFBUF Voltage Range
REFBUF Input Impedance
I
REFBUF
REFBUF Load Current
CONDITIONS
REFIN Overdriven, V
REFIN
= 2.048V
REFBUF Overdriven (Notes 7, 15)
V
REFIN
= 0V, Buffer Disabled
V
REFBUF
= 5V, 4 Channels Enabled (Notes 15, 16)
V
REFBUF
= 5V, Acquisition or Nap Mode (Note 15)
l
l
l
REFERENCE BUFFER CHARACTERISTICS
MIN
4.091
2.5
TYP
4.096
13
1.4
0.36
MAX
4.101
5
1.5
UNITS
V
V
kΩ
mA
mA
The
l
denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
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