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參數(shù)資料
| 型號： | LTC1297DC |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Single Chip 12-Bit Data Acquisition Systems |
| 中文描述： | 單芯片12位數(shù)據(jù)采集系統(tǒng) |
| 文件頁數(shù)： | 6/24頁 |
| 文件大小： | 466K |
| 代理商： | LTC1297DC |
6
LTC1292/LTC1297
C
HARA TERISTICS
U
A
TYPICAL PERFOR
CE
100
0.2
M
0.4
0.6
0.8
1.0
1k
10k
100k
LTC1292/7G13
0
V
CC
= 5V
V
= 5V
CLK = 1MHz
R
SOURCE
– (
)
+
–
+IN
–IN
+V
IN
R
SOURCE
Maximum Filter Resistor vs
Cycle Time
PI FU
U
#
PIN
FUNCTION
DESCRIPTION
1
CS
Chip Select Input
A logic low on this input enables the LTC1292/LTC1297. Power shutdown is activated on the LTC1297 when
CS is brought high.
These inputs must be free of noise with respect to GND.
GND should be tied directly to an analog ground plane.
The reference input defines the span of the A/D converter and must be kept free of noise with respect to GND.
The A/D conversion result is shifted out of this output.
This clock synchronizes the serial data transfer.
This supply must be kept free of noise and ripple by bypassing directly to the analog ground plane.
2, 3
4
5
6
7
8
+IN, –IN
GND
V
REF
D
OUT
CLK
V
CC
Analog Inputs
Analog Ground
Reference Input
Digital Data Output
Shift Clock
Positive Supply
* MAXIMUM CLK FREQUENCY REPRESENTS THE
CLK FREQUENCY AT WHICH A 0.1LSB SHIFT IN
THE ERROR AT ANY CODE TRANSITION FROM ITS
1MHz VALUE IS FIRST DETECTED.
** MAXIMUM R
REPRESENTS THE FILTER
RESISTOR VALUE AT WHICH A 0.1LSB CHANGE IN
FULL SCALE ERROR FROM ITS VALUE AT
R
FILTER
= 0
IS FIRST DETECTED.
CYCLE TIME (μs)
10
M
F
*
)
100
1k
10k
10
1k
10k
LTC1292/7 G14
1
100
+
–
+V
IN
C
FILTER
≥
1μF
R
FILTER
Maximum Clock Rate vs
Source Resistance
R
SOURCE
+ (
)
100
1
S
10
100
1000
10000
LTC1292/7 G15
+
–
+V
IN
R
SOURCE
V
REF
= 5V
V
CC
= 5V
T
A
= 25°C
0V TO 5V INPUT STEP
Sample-and-Hold Acquisition
Time vs Source Resistance
Input Channel Leakage Current vs
Temperature
AMBIENT TEMPERATURE (°C)
–50
0
I
100
300
400
500
1000
700
–10
30
50
130
LTC1292/7 G16
200
800
900
600
–30
10
70
90 110
ON CHANNEL
OFF CHANNEL
GUARANTEED
Noise Error vs Reference Voltage
REFERENCE VOLTAGE (V)
0
0
P
0.25
0.75
1.00
1.25
2
4
5
2.25
0.50
1
3
1.50
1.75
2.00
LTC1292/7 G17
LTC1292/LTC1297
NOISE = 200μV
P-P
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