Datasheet
2
LTC1274/LTC1277
(Notes 1, 2)
Supply Voltage (V
DD
) ................................................ 7V
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
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
LTC1274CSW
LTC1274ISW
ORDER
PART NUMBER
LTC1277CSW
LTC1277ISW
Digital Output Voltage
Unipolar Operation ................... – 0.3V to V
DD
+ 0.3V
Bipolar Operation...................... – 0.3V to V
DD
+ 0.3V
Power Dissipation............................................. 500mW
Operating Temperature Range
Commercial ............................................ 0°C to 70°C
Industrial ........................................... –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
T
JMAX
= 110°C, θ
JA
= 130°C/W
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
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
V
DD
V
SS
BUSY
CS
RD
CONVST
SLEEP
REFRDY
D0
D1
D2
D3
SW PACKAGE
24-LEAD PLASTIC SO WIDE
T
JMAX
= 110°C, θ
JA
= 130°C/W
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
24
23
22
21
20
19
18
17
16
15
14
13
A
IN
+
A
IN
–
V
REF
AGND
REFRDY
SLEEP
NAP
D7
D6
D5
D4
DGND
V
DD
V
SS
BUSY
CS
RD
CONVST
HBEN
V
LOGIC
D0/8
D1/9
D2/10
D3/11
(D11 = MSB)
SW PACKAGE
24-LEAD PLASTIC SO WIDE
Consult factory for Military grade parts.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes) ● 12 Bits
Integral Linearity Error (Note 7) ● ±1 LSB
Differential Linearity Error ● ±1 LSB
Unipolar Offset Error ±6 LSB
● ±8 LSB
Bipolar Offset Error (Note 8) ±8 LSB
● ±10 LSB
Gain Error ±20 LSB
Gain Error Tempco I
OUT(REF)
= 0 ● ±10 ±45 ppm/°C
CCHARA TERIST
ICS
CO
U
VERTER
With Internal Reference (Notes 5, 6)