3
LTC1448
VCC = 2.7V to 5.5V, VOUT A and VOUT B unloaded, REF ≤ VCC, TA = TMIN to TMAX, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
Note 4: Digital inputs at 0V or VCC.
Note 5: VOUT can only swing from (GND + VOS) to (VCC – VOS) when
output is unloaded.
Note 6. Guaranteed by design, not subject to test.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
AC Performance
Voltage Output Slew Rate
q
0.5
1.0
V/s
Voltage Output Settling Time
(Notes 2, 3) to ± 0.5LSB
14
s
Digital Feedthrough
0.3
nV s
Reference Input
RIN
REF Input Resistance
q
7.5
12.5
18
k
REF
REF Input Range
(Notes 5, 6)
q
0VCC
V
Digital I/O
VIH
Digital Input High Voltage
VCC = 5V
q
2.4
V
VCC = 3V
q
2.0
V
VIL
Digital Input Low Voltage
VCC = 5V
q
0.8
V
VCC = 3V
q
0.6
V
ILEAK
Digital Input Leakage
VIN = GND to VCC
q
±10
A
CIN
Digital Input Capacitance
(Note 6)
q
10
pF
Switching (VCC = 4.5V to 5.5V)
t1
DIN Valid to CLK Setup
q
40
ns
t2
DIN Valid to CLK Hold
q
0ns
t3
CLK High Time
(Note 6)
q
40
ns
t4
CLK Low Time
(Note 6)
q
40
ns
t5
CS/LD Pulse Width
(Note 6)
q
50
ns
t6
LSB CLK to CS/LD
(Note 6)
q
40
ns
t7
CS/LD Low to CLK
(Note 6)
q
20
ns
t8
CLK Low to CS/LD Low
(Note 6)
q
20
ns
Switching (VCC = 2.7V to 5.5V)
t1
DIN Valid to CLK Setup
q
60
ns
t2
DIN Valid to CLK Hold
q
0ns
t3
CLK High Time
(Note 6)
q
60
ns
t4
CLK Low Time
(Note 6)
q
60
ns
t5
CS/LD Pulse Width
(Note 6)
q
80
ns
t6
LSB CLK to CS/LD
(Note 6)
q
60
ns
t7
CS/LD Low to CLK
(Note 6)
q
30
ns
t8
CLK Low to CS/LD Low
(Note 6)
q
30
ns
The q denotes specifications which apply over the full operating
temperature range.
Note 1: Nonlinearity is defined from code 20 to code 4095 (full scale).
See Applications Information.
Note 2: Load is 5k in parallel with 100pF.
Note 3: DAC switched between all 1s and the code corresponding to VOS
for the part.