Datasheet

2
LTC1257
V
CC
to GND ............................................ –0.5V to 16.5V
TTL Input Voltage .......................... –0.5V to V
CC
+ 0.5V
V
OUT
.............................................. –0.5V to V
CC
+ 0.5V
REF ................................................ –0.5V to V
CC
+ 0.5V
Operating Temperature Range
LTC1257C ............................................. 0°C to 70°C
LTC1257I......................................... –40°C to 85°C
Maximum Junction Temperature
Plastic Package ............................. –65°C to 125°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
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
LTC1257CN8
LTC1257IN8
Consult factory for Military grade parts.
S8 PART MARKING
T
JMAX
= 125°C, θ
JA
= 100°C/W
T
JMAX
= 125°C, θ
JA
= 150°C/W
LTC1257CS8
LTC1257IS8
E
LECTR
IC
AL C CHARA TERIST
ICS
V
CC
= 4.75V to 15.75V, internal or external reference
(2.475V ≤ V
REF
≤ V
CC
– 2.7V), I
OUT
≤ 2mA, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
DAC
Resolution ● 12 Bits
DNL Differential Nonlinearity Guaranteed Monotonic ● ±0.5 LSB
INL Integral Nonlinearity LTC1257C
● ±3.5 LSB
LTC1257I ● ±4.0 LSB
OFF Offset Error When Using Internal Reference, LTC1257C
● ±8 LSB
When Using Internal Reference, LTC1257I ● ±10 LSB
When Using External Reference, LTC1257C
● ±4mV
When Using External Reference, LTC1257I ● ±5mV
OFF
TC
Offset Error Tempco When Using Internal Reference (Note 1) ● ±0.02 ±0.066 LSB/°C
When Using External Reference (Note 1) ● ±15 ±30 µV/°C
FSE Full-Scale Error ● 0.5 ±2 LSB
FSE
TC
Full-Scale Error Tempco (Note 1) ● ± 0.01 ±0.02 LSB/°C
Reference
Reference Output Voltage I
OUT
= 0, LTC1257C ● 2.028 2.048 2.068 V
I
OUT
= 0, LTC1257I ● 2.018 2.078 V
Reference Output Tempco I
OUT
= 0 ● ±0.06 LSB/°C
Reference Line Regulation I
OUT
= 0, LTC1257C ● ±0.4 LSB/V
I
OUT
= 0, LTC1257I ● ±0.7 LSB/V
Reference Load Regulation 0 ≤ I
OUT
≤ 100µA ● ±1 LSB
Reference Input Range V
CC
> V
REF
+ 2.7V ● 2.475 12 V
Reference Input Resistance ● 81418 kΩ
Reference Input Capacitance (Note 1) 15 pF
Short-Circuit Current V
OUT
Shorted to GND ● 90 mA
1
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4
8
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5
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TOP VIEW
N8 PACKAGE
8-LEAD PDIP
V
CC

V
OUT

REF
GND
CLK
D
IN

LOAD
D
OUT
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2
3
4
8
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6
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TOP VIEW
S8 PACKAGE
8-LEAD PLASTIC SO
V
CC

V
OUT

REF
GND
CLK
D
IN

LOAD
D
OUT
1257
1257I