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.
SYMBOL PARAMETER
Switching Characteristics (Note 5)
t
CS
t
WR
t
CWS
t
CWH
t
DWS
CS (MSB or LSB) Pulse Width
WR Pulse Width
CS to WR Setup
CS to WR Hold
Data Valid to WR Setup
V
CC
= 4.5V to 5.5V (LTC1450)
V
CC
= 2.7V to 3.6V (LTC1450L)
V
CC
= 5V (LTC1450L)
V
CC
= 4.5V to 5.5V (LTC1450)
V
CC
= 2.7V to 3.6V (LTC1450L)
V
CC
= 5V (LTC1450L)
q
q
q
q
q
q
q
q
q
q
CONDITIONS
MIN
40
40
0
0
40
40
0
0
40
40
TYP
MAX
UNITS
ns
ns
ns
ns
15
15
10
– 10
– 10
–5
ns
ns
ns
ns
ns
ns
ns
ns
t
DWH
Data Valid to WR Hold
t
LDAC
t
CLR
LDAC Pulse Width
CLR Pulse Width
The
q
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.
TYPICAL PERFORMANCE CHARACTERISTICS
Minimum Supply Voltage
vs Load Current
5.8
LTC1450 MINIMUM SUPPLY VOLTAGE (V)
5.6
5.4
5.2
5.0
4.8
4.6
4.4
4.2
∆V
OUT
< 1LSB
LTC1450
LTC1450L
3.6
3.4
3.2
3.0
2.8
2.6
0.1
1
10
LOAD CURRENT (mA)
2.4
100
1450/50L G01
420
410
400
390
380
370
360
350
– 55 – 35 –15
V
CC
= 5.5V
V
CC
= 5V
V
CC
= 4.5V
SUPPLY CURRENT (mA)
SUPPLY CURRENT (µA)
4.0
0.01
4
U W
LTC1450 Supply Current
vs Temperature
4.2
Supply Current
vs Logic Input Voltage
8
7
6
LTC1450
5
LTC1450L
4
3
2
1
V
CC
= 5V
ALL LOGIC INPUTS
TIED TOGETHER
450
LTC1450L MINIMUM SUPPLY VOLTAGE (V)
4.0
3.8
440
430
5 25 45 65 85 105 125
TEMPERATURE (°C)
1450/50L G02
0
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
LOGIC INPUT VOLTAGE (V)
1450/50L G03
LINER [ LINEAR TECHNOLOGY ]
