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參數(shù)資料
| 型號： | LTC1287BIN |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | 3V Single Chip 12-Bit Data Acquisition System |
| 中文描述： | 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP8 |
| 封裝： | PLASTIC, DIP-8 |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 324K |
| 代理商： | LTC1287BIN |
LTC1287
5
C
HARA TERISTICS
U
A
TYPICAL PERFOR
CE
R
SOURCE
– (
)
100
0
M
300
400
500
1k
10k
100k
LTC G10
200
100
V
CC
= 3V
V
REF
= 2.5V
CLK = 500kHz
+IN
–IN
+V
IN
R
SOURCE
–
R
SOURCE
+ (
)
100
1k
10k
LTC1287 G13
1
S
μ
s
10
100
+
–
V
IN
R
SOURCE
+
V
REF
= 2.5V
V
CC
= 3V
T
A
= 25°C
0V TO 2.5V INPUT STEP
Sample-and-Hold Acquisition
Time vs Source Resistance
AMBIENT TEMPERATURE (°C)
–50
0
I
100
300
400
500
1000
700
–10
30
50
130
LTC1287 G14
200
800
900
600
–30
10
70
90 110
ON CHANNEL
OFF CHANNEL
GUARANTEED
Input Channel Leakage Current vs
Temperature
REFERENCE VOLTAGE (V)
0
0
P
0.2
0.3
0.4
0.5
0.6
0.7
0.5
1.0
1.5
2.0
LTC1287 G15
2.5
0.8
0.9
1.0
0.1
3.0
LTC1287 NOISE = 200
μ
V
P-P
Noise Error vs Reference Voltage
Maximum Clock Rate vs Source
Resistance
Minimum Clock Rate for 0.1LSB
Error**
Maximum Filter Resistor vs Cycle
Time
*** MAXIMUM R
FILTER
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.
*
MAXIMUM CLK FREQUENCY REPRESENTS THE CLK FREQUENCY AT WHICH A 0.1LSB
SHIFT IN THE ERROR AT ANY CODE TRANSITION FROM ITS 500kHz VALUE IS FIRST
DETECTED.
AS THE CLK FREQUENCY IS DECREASED FROM 1MHz, MINIMUM CLK FREQUENCY
(
ERROR
≤
0.1LSB) REPRESENTS THE FREQUENCY AT WHICH A 0.1LSB SHIFT IN ANY
CODE TRANSITION FROM ITS 500kHz VALUE IS FIRST DETECTED.
**
#
PIN
FUNCTION
DESCRIPTION
1
2, 3
4
5
6
7
8
CS
+IN, –IN
GND
V
REF
D
OUT
CLK
V
CC
Chip Select Input
Analog Inputs
Analog Ground
Reference Input
Digital Data Output
Shift Clock
Positive Supply
A logic low on this input enables the LTC1287.
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.
PI FUU
U
CYCLE TIME (
μ
s)
10
M
F
*
)
100
1k
10k
10
1000
10000
LTC1287 G12
1
100
+
–
V
IN
C
FILTER
≥
1
μ
F
R
FILTER
AMBIENT TEMPERATURE (°C)
–50
M
0.05
0.10
0.15
0.20
–25
0
25
50
LTC1287 G11
75
100
0.25
V
CC
= 3V
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