Datasheet

4
LTC1654
1654fb
Note 4: DAC switched between code 2 k
L
and code 16383. See
Applications Information (page 11) for definition of low code k
L
.
Note 5: Digital inputs at 0V or V
CC
.
Note 6: Guaranteed by design.
Note 7: CS/LD = 0, V
OUT
= 4.096V and data is being clocked in.
Note 8: 100pF load capacitor.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Nonlinearity is defined from low code k
L
to code 16383. See
Applications Information (page 11).
Note 3: Offset error is measured at low code k
L
. See Applications
Information (page 11).
ELECTRICAL CHARACTERISTICS
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Integral Nonlinearity (INL)
vs Input Code
INPUT CODE
0
INL (LSB)
0
0.5
1.0
16383
1654 G01
–0.5
–1.0
–2.0
8192
–1.5
2.0
1.5
INPUT CODE
0
DNL (LSB)
0
0.5
1.0
16383
1654 G02
–0.5
–1.0
–2.0
8192
–1.5
2.0
1.5
TEMPERATURE (°C)
–55
OFFSET ERROR (mV)
–1.25
1.25
125
1654 G03
–2.50
–25
535
65 95
2.50
0
Differential Nonlinearity (DNL)
vs Input Code
Offset vs Temperature
Gain Error vs Temperature
Minimum Output Voltage
vs Load Current (Output Sinking)
Minimum Supply Headroom vs
Load Current (Output Sourcing)
TEMPERATURE (°C)
–55
GAIN ERROR (LSB)
–2.5
2.5
125
1654 G04
–5.0
–25
535
65 95
5.0
0
OUTPUT SINK CURRENT (mA)
0
OUTPUT PULL-DOWN VOLTAGE (V)
0.6
0.8
1.0
10
1645 G05
0.4
0.2
0.5
0.7
0.9
0.3
0.1
0
5
15
CODE: ALL ZEROS
T
A
= 125°C
T
A
= 25°C
T
A
= –55°C
LOAD CURRENT (mA)
0
V
CC
– V
OUT
(V)
0.6
0.8
1.0
10
1645 G06
0.4
0.2
0.5
0.7
0.9
0.3
0.1
0
5
15
T
A
= 125°C
CODE: ALL 1s
V
REFHI
= 4.096V
T
A
= 25°C
T
A
= –55°C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Switching Characteristics (V
CC
= 2.7V to 5.5V)
t
8
SDO Output Delay C
LOAD
= 100pF ● 5 150 ns
t
9
SCK Low to CS/LD Low (Note 6) ● 15 ns
t
10
CLR Pulse Width (Note 6) ● 45 ns
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. Unless otherwise noted, V
CC
= 2.7V to 5.5V, V
OUT A
, V
OUT B
unloaded,
REFHI A, REFHI B = 4.096V (V
CC
= 5V), REFHI A, REFHI B = 2.048V (V
CC
= 2.7V), REFLO = 0V, X
1
/X
1/2
= 0V.