參數(shù)資料
型號： LTC1291DCN8
廠商： LINEAR TECHNOLOGY CORP
元件分類： ADC
英文描述： Single Chip 12-Bit Data Acquisition System
中文描述： 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP8
封裝： 0.300 INCH, PLASTIC, DIP-8
文件頁數(shù)： 5/20頁
文件大小： 376K
代理商： LTC1291DCN8
5
LTC1291
C
HARA TERISTICS
U
A
TYPICAL PERFOR
CE
D
OUT
Delay Time vs Temperature
Maximum Clock Rate vs Source
Resistance
Maximum Filter Resistor vs
Cycle Time
CYCLE TIME (μs)
10
M
F
*
)
100
1k
10k
10
1k
10k
1291 G12
1
100
+
–
+V
IN
C
FILTER
≥
1μF
R
FILTER
100
0.2
M
0.4
0.6
0.8
1.0
1k
10k
100k
1291 G11
0
V
= 5V
CLK = 1MHz
R
SOURCE–
(
)
+
–
+IN
–IN
+V
IN
R
SOURCE
–
AMBIENT TEMPERATURE (°C)
–50
0
I
100
300
400
500
1000
700
–10
30
50
130
1291 G14
200
800
900
600
–30
10
70
90 110
ON CHANNEL
OFF CHANNEL
GUARANTEED
Input Channel Leakage Current
vs Temperature
Sample-and-Hold Acquisition
Time vs Source Resistance
* 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.
PI FU
U
#
PIN
FUNCTION
DESCRIPTION
1
2, 3
4
5
6
7
8
CS
CH0, CH1
GND
D
IN
D
OUT
CLK
V
CC
(V
REF
)
Chip Select Input
Analog Inputs
Analog Ground
Digital Data Input
Digital Data Output
Shift Clock
Positive Supply and
Reference Voltage
A logic low on this input enables the LTC1291.
These inputs must be free of noise with respect to GND.
GND should be tied directly to an analog ground plane.
The multiplexer address is shifted into this input.
The A/D conversion result is shifted out of this output.
This clock synchronizes the serial data transfer.
This pin provides power and defines the span of the A/D converter. This supply must be kept free of noise and
ripple by bypassing directly to the analog ground plane.
AMBIENT TEMPERATURE (°C)
–50
D
O
↓
150
200
250
50
1291 G10
100
0
–25
0
25
75
125
100
V
CC
= 5V
50
MSB-FIRST DATA
LSB-FIRST DATA
R
SOURCE
+ (
)
100
1
S
10
100
1k
10k
1291 G13
+
–
V
IN
R
SOURCE
+
V
CC
= 5V
T
= 25°C
0V TO 5V INPUT STEP
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