LTC1426IS8 查看數據表（PDF） - Linear Technology
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LTC1426IS8 Datasheet PDF : 8 Pages
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LTC1426
TYPICAL PERFORMANCE CHARACTERISTICS
Minimum Clock High Time
vs Temperature
600
500
400
VCC = 3V
300
200
VCC = 5V
100
0
– 40
– 15 10
35
60
85
TEMPERATURE (°C)
1426 G04
Supply Current
vs Logic Input Voltage
38.5
PUSHBUTTON
36.5
MODE
34.5
32.5
PULSE
30.5
MODE
28.5
26.5
24.5
22.5
0
TA = 25°C
CLK1 AND CLK2
TIED TOGETHER
1
2
3
4
LOGIC INPUT VOLTAGE (V)
5
1426 F05
Supply Current vs Temperature
60
VCC = 5V
50
PUSHBUTTON
40
MODE
30
PULSE
20
MODE
10
0
– 40
– 15 10
35
60
85
TEMPERATURE (°C)
1426 G06
PIN FUNCTIONS
CLK1 (Pin 1): Channel 1 Clock/Pushbutton Input.
CLK2 (Pin 2): Channel 2 Clock/Pushbutton Input.
GND (Pin 3): Ground. It is recommended that GND be tied
to a ground plane.
PWM1 (Pin 4): Channel 1 PWM Output.
PWM2 (Pin 5): Channel 2 PWM Output.
VREF (Pin 6): Voltage Reference Input. VREF powers the
DAC output buffers and can be used to control the output
span. Bypass VREF to GND with an external capacitor to
minimize output errors. VREF can be tied to VCC if desired.
VCC (Pin 7): Voltage Supply. This supply must be kept free
from noise and ripple by bypassing directly to the ground
plane.
SHDN (Pin 8): Shutdown. A logic low puts the chip into
shutdown mode with the PWM outputs in high imped-
ance. The digital settings for the DACs are retained in
shutdown.
WU
W
TI I G DIAGRA S
CLK1
CLK2
Pulse Mode Timing
tCKL0
tCKHI
1426 TC01
Pushbutton Mode Timing
tPW
CLK1
CLK2
1426 TC02
4
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