參數(shù)資料
型號(hào): LTC1297
廠商: Linear Technology Corporation
英文描述: Single Chip 12-Bit Data Acquisition Systems(5V,單片,12位數(shù)據(jù)采集系統(tǒng)(內(nèi)置采樣和保持))
中文描述: 單芯片12位數(shù)據(jù)采集系統(tǒng)(5V的,單片,12位數(shù)據(jù)采集系統(tǒng)(內(nèi)置采樣和保持))
文件頁數(shù): 4/24頁
文件大小: 398K
代理商: LTC1297
4
LTC1292/LTC1297
DIGITAL U
(Note 3)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
I
CC
Positive Supply Current
CS High
LTC1292
G
6
12
mA
CS Low
LTC1297
G
6
12
mA
LTC1297BC, LTC1297CC, LTC1297DC
G
5
10
μ
A
LTC1297BI, LTC1297CI, LTC1297DI
LTC1297BM, LTC1297CM, LTC1297DM
G
5
15
μ
A
I
REF
Reference Current
CS High
G
10
50
μ
A
LTC1292B/LTC1297B
LTC1292C/LTC1297C
LTC1292D/LTC1297D
C
HARA TERISTICS
U
A
TYPICAL PERFOR
CE
CS High
Power
Shutdown
CLK Off
AMBIENT TEMPERATURE (°C)
–50
S
7
8
9
30
70
LTC1292/7 G02
6
5
–30 –10
50
90 110
4
3
10
10
130
CLK = 1MHz
V
CC
= 5V
SUPPLY VOLTAGE (V)
4
S
4
6
6
LTC1292/7 G01
2
0
5
10
8
CLK = 1MHz
T
A
= 25°C
LTC1297 Supply Current (Power
Shutdown) vs Temperature
AMBIENT TEMPERATURE (°C)
–50
0
S
μ
A
1
3
4
5
10
7
0
50
75
LTC1292/7 G03
2
8
9
6
–25
25
100
125
V
CC
= 5V
V
REF
= 5V
CS HIGH
CLK OFF
Supply Current vs Temperature
Supply Current vs Supply Voltage
below GND 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.
Note 9:
Increased leakage currents at elevated temperatures cause the S/
H to droop, therefore it is recommended that f
CLK
125kHz at 125
°
C, f
CLK
31kHz at 85
°
C, and f
CLK
3kHz at 25
°
C.
The
G
denotes specifications which apply over the operating temperature
range; all other limits and typicals T
A
= 25
°
C.
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 ground (unless otherwise
noted).
Note 3:
V
CC
= 5V, V
REF
= 5V, CLK = 1.0MHz unless otherwise specified.
Note 4:
One LSB is equal to V
REF
divided by 4096. For example, when V
REF
= 5V, 1LSB = 5V/4096 = 1.22mV.
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
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