LTC1446/LTC1446L
TYPICAL PERFORMANCE CHARACTERISTICS
LTC1446L Supply Current vs Logic
Input Voltage
1.2
1.1
SUPPLY CURRENT (mA)
970
960
SUPPLY CURRENT (µA)
SUPPLY CURRENT (µA)
1.0
0.9
0.8
0.7
0.6
0.5
0.5
1.0
1.5
2.0
LOGIC INPUT VOLTAGE (V)
1446/46L G10
PIN FUNCTIONS
CLK:
The Serial Interface Clock.
D
IN
:
The Serial Interface Data.
CS/LD:
The Serial Interface Enable and Load Control.
When CS/LD is low the CLK signal is enabled, so the data
can be clocked in. When CS/LD is pulled high data is
loaded from the shift register into the DAC registers,
updating the DAC outputs.
D
OUT
:
The output of the shift register which becomes valid
on the rising edge of the serial clock.
GND:
Ground.
V
OUT A
,V
OUT B
:
Buffered DAC Outputs.
V
CC
:
Positive Supply Input.
4.5V
≤
V
CC
≤
5.5V (LTC1446), 2.7V
≤
V
CC
≤
5.5V
(LTC1446L). Requires a 0.1µF bypass capacitor to
ground.
U W
2.5
LTC1446 Supply Current vs
Temperature
700
690
680
670
660
650
640
630
LTC1446L Supply Current
vs Temperature
950
940
930
920
910
V
CC
= 5.5V
V
CC
= 3.3V
V
CC
= 3V
V
CC
= 5V
V
CC
= 2.7V
V
CC
= 4.5V
5 25 45 65 85 105 125
TEMPERATURE (°C)
1446/46L G11
3.0
900
–55 –35 –15
620
– 55 – 35 –15
5 25 45 65 85 105 125
TEMPERATURE (°C)
1446/46L G12
Large Signal Transient Response
V
OUT
(2V/DIV)
CS/LD
(5V/DIV)
TIME (10µs/DIV)
1446L G13
U
U
U
5
LINER [ LINEAR TECHNOLOGY ]
