LTC1288CS8 Просмотр технического описания (PDF) - Linear Technology
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LTC1288CS8 Datasheet PDF : 24 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS
LTC1285/LTC1288
Minimum Clock Frequency
for 0.1 LSB Error vs Temperature
120
VCC = 2.7V
VREF = 2.5V
100
80
60
40
20
2
0
0
10 20 30 40 50 60 70
TEMPERATURE (°C)
LTC1285/88 • TPC22
Digital Input Logic Threshold
vs Supply Voltage
3.0
TA = 25°C
2.5
2.0
1.5
1.0
0.5
0
2.5 3.0
3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY VOLTAGE (V)
LTC1285/88 • TPC23
Input Channel Leakage Current
vs Temperature
1000
100
VCC = 2.7V
VREF = 2.5V
10
1
ON CHANNEL
OFF CHANNEL
0.1
0.01
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
LTC1285/88 • TPC24
PIN FUNCTIONS
LTC1285
VREF (Pin 1): Reference Input. The reference input defines
the span of the A/D converter.
IN+ (Pin 2): Positive Analog Input.
IN – (Pin 3): Negative Analog Input.
GND (Pin 4): Analog Ground. GND should be tied directly
to an analog ground plane.
CS/SHDN (Pin 5): Chip Select Input. A logic low on this
input enables the LTC1285. A logic high on this input
disables and powers down the LTC1285.
DOUT (Pin 6): Digital Data Output. The A/D conversion
result is shifted out of this output.
CLK (Pin 7): Shift Clock. This clock synchronizes the serial
data transfer and determines conversion speed.
VCC (Pin 8): Power Supply Voltage. This pin provides
power to the A/D converter. It must be kept free of noise
and ripple by bypassing directly to the analog ground
plane.
LTC1288
CS/SHDN (Pin 1): Chip Select Input. A logic low on this
input enables the LTC1288. A logic high on this input
disables and powers down the LTC1288.
CH0 (Pin 2): Analog Input.
CH1 (Pin 3): Analog Input.
GND (Pin 4): Analog Ground. GND should be tied directly
to an analog ground plane.
DIN (Pin 5): Digital Data Input. The multiplexer address is
shifted into this input.
DOUT (Pin 6): Digital Data Output. The A/D conversion
result is shifted out of this output.
CLK (Pin 7): Shift Clock. This clock synchronizes the
serial data transfer and determines conversion speed.
VCC/VREF (Pin 8): Power Supply and Reference Voltage.
This pin provides power and defines the span of the A/D
converter. It must be kept free of noise and ripple by
bypassing directly to the analog ground plane.
7
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