參數(shù)資料
型號： LTC1293
廠商： Linear Technology Corporation
英文描述： Single Chip 12-Bit Data Acquisition System(單片，12位數(shù)據(jù)采集系統(tǒng))
中文描述： 單芯片12位數(shù)據(jù)采集系統(tǒng)（單片，12位數(shù)據(jù)采集系統(tǒng)）
文件頁數(shù)： 4/28頁
文件大小： 403K
代理商： LTC1293
4
LTC1293/LTC1294/LTC1296
SYMBOL
V
IH
PARAMETER
High Level Input Voltage
CONDITIONS
V
CC
= 5.25V
MIN
2.0
TYP
MAX
UNITS
G
V
V
IL
Low Level Input Voltage
V
CC
= 4.75V
G
0.8
V
I
IH
High Level Input Current
V
IN
= V
CC
G
2.5
μ
A
μ
A
I
IL
V
OH
Low Level Input Current
V
IN
= 0V
V
CC
= 4.75V, I
O
= –10mA
I
O
= 360
μ
A
V
CC
= 4.75V, I
O
= 1.6mA
V
OUT =
V
CC
,
CS High
V
OUT
= 0V, CS High
V
OUT
= 0V
V
OUT
= V
CC
CS High
G
–2.5
High Level Output Voltage
4.7
4.0
V
G
2.4
V
OL
I
OZ
Low Level Output Voltage
G
0.4
V
High Z Output Leakage
G
G
3
μ
A
–3
I
SOURCE
I
SINK
I
CC
I
CC
Output Source Current
–20
mA
Output Sink Current
20
mA
Positive Supply Current
G
6
12
mA
Positive Supply Current
CS High,
Power
Shutdown
LTC1294BC, LTC1294CC,
LTC1294DC, LTC1294BI,
LTC1294CI, LTC1294DI,
G
5
10
μ
A
CLK Off
LTC1294BM, LTC1294CM,
LTC1294DM
G
5
15
μ
A
I
REF
I
–
Reference Current
CS High
G
10
50
μ
A
μ
A
mA
Negative Supply Current
CS High
G
1
50
I
SOURCEs
I
SINKs
SSO Source Current
V
SSO
= 0V
V
SSO
= V
CC
G
0.8
1.5
SSO Sink Current
G
0.5
1.0
mA
ELECTRICAL C
HARA TER STICS
DIGITAL A D
U
DC
(Note 3)
LTC1293/4/6B
LTC1293/4/6C
LTC1293/4/6D
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
All voltage values are with respect to DGND, AGND and REF
–
wired
together (unless otherwise noted).
Note 3:
V
CC
= 5V, V
REF
+
= 5V, V
REF
–
= 0V, V
–
= 0V for unipolar mode and
–5V for bipolar mode, CLK = 1.0MHz unless otherwise specified. The
G
denotes specifications which apply over the full operating temperature
range; all other limits and typicals T
A
= 25
°
C.
Note 4:
These specs apply for both unipolar and bipolar modes. In bipolar
mode, one LSB is equal to the bipolar input span (2V
REF
) divided by 4096.
For example, when V
REF
= 5V, 1LSB (bipolar) = 2 (5V)/4096 = 2.44mV.
Note 5:
Linearity error is specified between the actual end points of the
A/D transfer curve. The deviation is measured from the center of the
quantization band.
Note 6:
Recommended operating conditions.
Note 7:
Two on-chip diodes are tied to each reference and analog input
which will conduct for reference or analog input voltages one diode drop
below V
–
or one diode drop above V
CC
. Be careful during testing at low
V
CC
levels (4.5V), as high level reference or analog inputs (5V) can cause
this input diode to conduct, especially at elevated temperatures, and cause
errors for inputs near full scale. This spec allows 50mV forward bias of
either diode. This means that as long as the reference or analog input
does not exceed the supply voltage by more than 50mV, the output code
will be correct. To achieve an absolute 0V to 5V input voltage range will
therefore require a minimum supply voltage of 4.950V over initial
tolerance, temperature variations and loading.
Note 8
: Channel leakage current is measured after the channel selection.
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