5
LTC1446/LTC1446L
1446L G13
TIME (10
s/DIV)
VOUT
(2V/DIV)
CS/LD
(5V/DIV)
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
LTC1446L Supply Current vs Logic
Input Voltage
LOGIC INPUT VOLTAGE (V)
0.5
1.0
1.1
1.2
1446/46L G10
0.9
0.8
1.0
1.5
2.0
2.5
3.0
0.7
0.6
0.5
SUPPLY
CURRENT
(mA)
LTC1446 Supply Current vs
Temperature
TEMPERATURE (
°C)
–55
SUPPLY
CURRENT
(
A)
660
670
680
105
1446/46L G12
650
640
620
–15
25
65
– 35
125
5
45
85
630
700
690
VCC = 3.3V
VCC = 2.7V
VCC = 3V
LTC1446L Supply Current
vs Temperature
PIN FUNCTIONS
UU
U
CLK: The Serial Interface Clock.
DIN: 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.
DOUT: The output of the shift register which becomes valid
on the rising edge of the serial clock.
GND: Ground.
VOUT A,VOUT B: Buffered DAC Outputs.
VCC: Positive Supply Input.
4.5V
≤ VCC ≤ 5.5V (LTC1446), 2.7V ≤ VCC ≤ 5.5V
(LTC1446L). Requires a 0.1
F bypass capacitor to
ground.
TEMPERATURE (
°C)
–55 –35 –15
5
25
45
65
85 105
900
SUPPLY
CURRENT
(
A)
910
930
940
970
1446/46L G11
920
125
950
960
VCC = 5.5V
VCC = 4.5V
VCC = 5V
Large Signal Transient Response