
4
LTC1458/LTC1458L
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Nonlinearity is defined from the first code that is greater than or
equal to the maximum offset specification to code 4095 (full scale).
Note 3: Load is 5k
in parallel with 100pF.
Note 4: DAC switched between all 1s and the code corresponding to VOS
for the part.
Note 5: Digital inputs at 0V or VCC.
LTC1458
Integral Nonlinearity (INL)
LTC1458
Differential Nonlinearity (DNL)
CODE
0
DNL
(LSB)
0.5
0.4
0.3
0.2
0.1
0
–0.1
–0.2
–0.3
–0.4
–0.5
1024
2048 2560
1458 G09
512
1536
3072 3584 4095
CODE
0
INL
ERROR
(LSB)
2.0
1.6
1.2
0.8
0.4
0
–0.4
–0.8
–1.2
–1.6
–2.0
1024
2048 2560
1458 G08
512
1536
3072 3584 4095
Minimum Supply Headroom for
Full Output Swing vs Load Current
LOAD CURRENT (mA)
V
CC
–
V
OUT
(V)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
1458 G03
0
VOUT < 1LSB
REFLO = GND
X1/X2 = GND
CODE: ALL 1's
VOUT = 4.095V
5
10
15
20
25
30
Minimum Output Voltage vs
Output Sink Current
Output Swing vs Load Resistance
LOAD RESISTANCE (
)
10
OUTPUT
SWING
(V)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
100
1k
10k
1458 G05A
RL
REFLO = GND
X1/X2 = GND
DAC CODE = FFFH
LOAD RESISTANCE (
)
10
OUTPUT
SWING
(V)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
100
1k
10k
1458 G06A
REFLO = GND
X1/X2 = GND
DAC CODE = OOOH
RL
VCC
OUTPUT SINK CURRENT (mA)
OUTPUT
PULL-DOWN
VOLTAGE
(mV)
1000
900
800
700
600
500
400
300
200
100
0.1
1458 G04
0
REFLO = GND
X1/X2 = GND
125
°C
–55
°C
25
°C
5
10
15
20
25
30
Output Swing vs Load Resistance
ELECTRICAL CHARACTERISTICS
TYPICAL PERFOR A CE CHARACTERISTICS
UW