LTC1392C View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1392C' PDF : 12 Pages View PDF
TYPICAL PERFORMANCE CHARACTERISTICS
Thermal Response in Stirred
Oil Bath
70
65
VCC = 5V
60
55
50
45
40
N8
35
S8
30
25
20
0
5 10 15 20 25 30
TIME (SEC)
1392 G07
Thermal Response in Still Air
70
65
VCC = 5V
60
55
50
45
40
35
N8
30
S8
25
20
0
50 100 150 200 250 300
TIME (SEC)
1392 G08
LTC1392
Supply Current vs Sample Rate
1000
CS LOW BETWEEN SAMPLES
100
CS HIGH BETWEEN
SAMPLES
10
1
0.1
0.1
VCC = 5V
fCLK = 250kHz
TA = 25°C
1 10 100 1k 10k 100k
SAMPLE FREQUENCY (Hz)
1392 G09
PIN FUNCTIONS
DIN (Pin 1): Digital Input. The A/D configuration word is
shifted into this input.
DOUT (Pin 2): Digital Output. The A/D result is shifted out
of this output.
CLK (Pin 3): Shift Clock. This clock synchronizes the serial
data.
CS (Pin 4): Chip Select Input. A logic low on this input
enables the LTC1392.
GND (Pin 5): Ground Pin. GND should be tied directly to
an analog ground plane.
+VIN (Pin 6): Positive Analog Differential Input. The pin
can be used as a single-ended input by grounding – VIN.
– VIN (Pin 7): Negative Analog Differential Input. The input
must be free from noise.
VCC (Pin8): Positive Supply. This supply must be kept free
from noise and ripple by bypassing directly to the ground
plane.
BLOCK DIAGRAM
1
DIN
INPUT
SHIFT
REGISTER
BANDGAP
VREF = 2.42V
VREF = 1V
VREF = 0.5V
TEMPERATURE
SENSOR
GND
+VIN 6
–VIN 7
VCC
VREF
+
–
+ ANALOG
–
INPUT
MUX
+
–
CSAMPLE
8
VCC
COMP
5
GND
10-BIT
CAPACITIVE DAC
3 CLK
SERIAL
PORT
10
BITS
10-BIT
SAR
2 DOUT
CONTROL
AND TIMING
4 CS
LTC1392 • BD
5
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