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LTC1290CCSW Datasheet(PDF) 7 Page - Linear Technology

Part # LTC1290CCSW
Description  Single Chip 12-Bit Data Acquisition System
Download  32 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC1290CCSW Datasheet(HTML) 7 Page - Linear Technology

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LTC1290
1290fe
Sample-and-Hold Acquisition
Time vs Source Resistance
RSOURCE+ (Ω)
100
1
10
100
1k
10k
LTC1290 • TPC11
+
VIN
RSOURCE+
VREF = 5V
VCC = 5V
TA = 25°C
0V TO 5V INPUT STEP
ACLK FREQUENCY (MHz)
0
1.00
2.00
3.00
4.00
1290 • TPC13
200
180
160
140
120
100
80
60
40
20
VCC = 5V
CMOS LEVELS
Supply Current (Power Shutdown)
vs ACLK
Supply Current (Power Shutdown)
vs Temperature
AMBIENT TEMPERATURE, TA (°C)
–50
10
9
8
7
6
5
4
3
2
1
0
–10
30
50
130
1290 • TPC12
–30
10
70
90 110
ACLK OFF DURING
POWER SHUTDOWN
Input Channel Leakage Current
vs Temperature
AMBIENT TEMPERATURE, TA (°C)
–50
0
100
300
400
500
1000
700
–10
30
50
130
1290 • TPC14
200
800
900
600
–30
10
70
90 110
ON CHANNEL
OFF CHANNEL
GUARANTEED
Noise Error vs Reference Voltage
REFERENCE VOLTAGE, VREF (V)
0
0
0.25
0.75
1.00
1.25
2
4
5
2.25
1290 • TPC15
0.50
13
1.50
1.75
2.00
LTC1290 NOISE 200
µVP-P
CH0 to CH7 (Pin 1 to Pin 8): Analog Inputs. The analog
inputs must be free of noise with respect to AGND.
COM (Pin 9): Common. The common pin defines the zero
reference point for all single-ended inputs. It must be free
of noise and is usually tied to the analog ground plane.
DGND (Pin 10): Digital Ground. This is the ground for the
internal logic. Tie to the ground plane.
AGND (Pin 11): Analog Ground. AGND should be tied
directly to the analog ground plane.
V (Pin 12): Negative Supply. Tie V to most negative
potential in the circuit. (Ground in single supply applica-
tions.)
REF , REF + (Pins 13, 14): Reference Inputs. The refer-
ence inputs must be kept free of noise with respect to
AGND.
CS (Pin 15): Chip Select Input. A logic low on this input
enables data transfer.
DOUT (Pin 16): Digital Data Output. The A/D conversion
result is shifted out of this output.
Maximum Filter Resistor vs
Cycle Time
CYCLE TIME, tCYC (µs)
10
100
1k
10k
10
1000
10000
1290 • TPC10
1.0
100
+
VIN
CFILTER ≥ 1µF
RFILTER
** MAXIMUM RFILTER REPRESENTS THE FILTER RESISTOR
VALUE AT WHICH A 0.1LSB CHANGE IN FULL-SCALE
ERROR FROM ITS VALUE AT RFILTER = 0 IS FIRST DETECTED.
TYPICAL PERFOR A CE CHARACTERISTICS
PI FU CTIO S


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