Datasheet

2
LTC1278
A
U
G
W
A
W
U
W
ARB
S
O
LU
T
EXI T
I
S
WU
U
PACKAGE
/
O
RDER I FOR ATIO
ORDER
PART NUMBER
AV
DD
= DV
DD
= V
DD
(Notes 1, 2)
Supply Voltage (V
DD
).............................................. 12V
Negative Supply Voltage (V
SS
)
Bipolar Operation Only .......................... –6V to GND
Total Supply Voltage (V
DD
to V
SS
)
Bipolar Operation Only ....................................... 12V
Analog Input Voltage (Note 3)
Unipolar Operation ................... – 0.3V to V
DD
+ 0.3V
Bipolar Operation............... V
SS
– 0.3V to V
DD
+ 0.3V
Digital Input Voltage (Note 4)
Unipolar Operation ................................–0.3V to 12V
Bipolar Operation........................... V
SS
– 0.3V to 12V
Digital Output Voltage
Unipolar Operation ................... –0.3V to V
DD
+ 0.3V
Bipolar Operation................ V
SS
– 0.3V to V
DD
+ 0.3V
Power Dissipation............................................. 500mW
Operating Temperature Range
LTC1278-4C, LTC1278-5C ..................... 0°C to 70°C
LTC1278-4I ....................................... –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
SW PACKAGE
24-LEAD PLASTIC SO WIDE
N PACKAGE
24-LEAD PDIP
24
23
22
21
20
19
18
17
16
15
14
13
A
IN

V
REF

AGND
D11 (MSB)
D10
D9
D8
D7
D6
D5
D4
DGND
AV
DD

V
SS

BUSY
CS
RD
CONVST
SHDN
DV
DD

D0
D1
D2
D3
T
JMAX
= 110°C, θ
JA
= 100°C/W (N)
T
JMAX
= 110°C, θ
JA
= 130°C/W (SW)
Consult factory for Military grade parts.
LTC1278-4CN
LTC1278-5CN
LTC1278-4IN
LTC1278-4CSW
LTC1278-5CSW
LTC1278-4ISW
LTC1278-4/LTC1278-5
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes) ● 12 Bit
Integral Linearity Error (Note 7) ● ±1 LSB
Differential Linearity Error ● ±1 LSB
Offset Error (Note 8) ±4 LSB
● ±6 LSB
Gain Error ±15 LSB
Gain Error Tempco I
OUT(REF)
= 0 ● ±10 ±45 ppm/°C
CCHARA TERIST
ICS
CO
U
VERTER
With Internal Reference (Notes 5, 6)
LTC1278-4/LTC1278-5
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Analog Input Range (Note 9) 4.95V ≤ V
DD
≤ 5.25V (Unipolar) ● 0 to 5 V
4.75V ≤ V
DD
≤ 5.25V, –5.25V ≤ V
SS
≤ – 2.45V (Bipolar) ● ±2.5 V
I
IN
Analog Input Leakage Current CS = High ● ±1 µA
C
IN
Analog Input Capacitance Between Conversions (Sample Mode) 45 pF
During Conversions (Hold Mode) 5 pF
PUT
U
IA
A
U
LOG
(Note 5)