4
LTC1450/LTC1450L
ELECTRICAL CHARACTERISTICS
V
CC
= 4.5V to 5.5V (LTC1450), V
CC
= 2.7V to 3.6V (LTC1450L), T
A
= T
MIN
to T
MAX
, unless otherwise noted.
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
LOAD CURRENT (mA)
4.4
LTC1450 MINIMUM SUPPLY VOLTAGE (V)
LTC1450L MINIMUM SUPPLY VOLTAGE (V)
4.8
5.0
5.4
5.8
0.01 1 10 100
1450/50L G01
4.0
0.1
5.2
4.6
4.2
5.6
2.8
3.2
3.4
3.8
4.2
2.4
3.6
3.0
2.6
4.0
∆V
OUT
< 1LSB
LTC1450
LTC1450L
Minimum Supply Voltage
vs Load Current
TEMPERATURE (°C)
–55
350
SUPPLY CURRENT (µA)
360
380
390
400
450
420
–15
25
45 125
1450/50L G02
370
430
440
410
–35 5
65
85
105
V
CC
= 5.5V
V
CC
= 4.5V
V
CC
= 5V
LOGIC INPUT VOLTAGE (V)
0 0.5 1.0 1.5 2.0 3.0 4.03.5 4.5
SUPPLY CURRENT (mA)
6
8
1450/50L G03
4
2
0
7
5
3
1
2.5
5.0
V
CC
= 5V
ALL LOGIC INPUTS
TIED TOGETHER
LTC1450
LTC1450L
LTC1450 Supply Current
vs Temperature
Supply Current
vs Logic Input Voltage
The ● denotes specifications which apply over the full operating
temperature range.
Note 1: Nonlinearity is defined from the first code that is greater than or
equal to the maximum offset specification to code 4095 (full-scale).
Note 2: Load is 5kΩ in parallel with 100pF.
Note 3: DAC switched all 1’s and the code corresponding to V
OS(MAX)
for
the part.
Note 4: Digital inputs at 0V or V
CC
.
Note 5: Digital inputs swing 10% to 90% of V
CC
, t
r
= t
f
= 5ns and timing
measurements are from V
CC
/2.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Switching Characteristics (Note 5)
t
CS
CS (MSB or LSB) Pulse Width ● 40 ns
t
WR
WR Pulse Width ● 40 ns
t
CWS
CS to WR Setup ● 0ns
t
CWH
CS to WR Hold ● 0ns
t
DWS
Data Valid to WR Setup V
CC
= 4.5V to 5.5V (LTC1450) ● 40 15 ns
V
CC
= 2.7V to 3.6V (LTC1450L) ● 40 15 ns
V
CC
= 5V (LTC1450L) 10 ns
t
DWH
Data Valid to WR Hold V
CC
= 4.5V to 5.5V (LTC1450) ● 0–10 ns
V
CC
= 2.7V to 3.6V (LTC1450L) ● 0–10 ns
V
CC
= 5V (LTC1450L) –5 ns
t
LDAC
LDAC Pulse Width ● 40 ns
t
CLR
CLR Pulse Width ● 40 ns
