Datasheet

2
LTC1854/LTC1855/LTC1856
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Consult LTC Marketing for parts specified with wider operating temperature ranges.
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TOP VIEW
G PACKAGE
28-LEAD PLASTIC SSOP
28
27
26
25
24
23
22
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19
18
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16
15
COM
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
MUXOUT
+
MUXOUT
–
ADC
+
ADC
–
AGND1
CONVST
RD
SCK
SDI
DGND
SDO
BUSY
OV
DD
DV
DD
AV
DD
AGND3
AGND2
REFCOMP
V
REF
A
U
G
W
A
W
U
W
ARB
S
O
LU
T
EXI T
I
S
Supply Voltage (OV
DD
= DV
DD
= AV
DD
= V
DD
) ........... 6V
Ground Voltage Difference
DGND, AGND1, AGND2, AGND3 ...................... ±0.3V
Analog Input Voltage
ADC
+
, ADC
–
(Note 3) ...................(AGND1 – 0.3V) to (AV
DD
+ 0.3V)
CH0-CH7, COM .................................................. ±30V
Digital Input Voltage (Note 4) ...... (DGND – 0.3V) to 10V
Digital Output Voltage .... (DGND – 0.3V) to (DV
DD
+ 0.3V)
Power Dissipation .............................................. 500mW
Operating Temperature Range
LTC1854C/LTC1855C/LTC1856C ............ 0∞C to 70∞C
LTC1854I/LTC1855I/LTC1856I .......... –40∞C to 85∞C
Storage Temperature Range ................. – 65∞C to 150∞C
Lead Temperature (Soldering, 10 sec) ................. 300∞C
T
JMAX
= 110∞C, q
JA
= 95∞C/W
(Notes 1, 2)
ORDER PART NUMBER
LTC1855CG
LTC1855IG
PACKAGE/ORDER I FOR ATIO
UU
W
The ● denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25∞C.
MUXOUT connected to ADC inputs. (Notes 5, 6)
CO VERTER A D ULTIPLEXER CHARACTERISTICS
U
W U
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
LTC1854CG
LTC1854IG
LTC1856CG
LTC1856IG
LTC1854 LTC1855 LTC1856
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
Resolution ● 12 14 16 Bits
No Missing Codes ● 12 14 15 Bits
Transition Noise 0.06 0.25 1 LSB
RMS
Integral Linearity Error (Note 7) ● ±1 ±1.5 ±3LSB
Differential Linearity Error ● –1 1 –1 1.5 –2 4 LSB
Bipolar Zero Error (Note 8) ● ±5 ±8 ±23 LSB
Bipolar Zero Error Drift ±0.1 ±0.1 ±0.1 ppm/∞C
Bipolar Zero Error Match 3 4 10 LSB
Bipolar Full-Scale Error External Reference (Note 11) ● ±0.34 ±0.14 ±0.1 %
Internal Reference (Note 11) ±0.45 ±0.40 ±0.4 %
Bipolar Full-Scale Error Drift External Reference ±2.5 ±2.5 ±2.5 ppm/∞C
Internal Reference ±7 ±7 ±7 ppm/∞C
Bipolar Full-Scale Error Match 5 10 15 LSB
Input Common Mode Range ● ±10 ±10 ±10 V
Input Common Mode Rejection Ratio 96 96 96 dB