Datasheet

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 5kΩ in parallel with 100pF.
Note 4: DAC switched between all 1s and the code corresponding to V
OS
for the part.
Note 5: Digital inputs at 0V or V
CC
.
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
∆V
OUT
< 1LSB
REFLO = GND
X1/X2 = GND
CODE: ALL 1's
V
OUT
= 4.095V
5
10 15 20 25 30
Minimum Output Voltage vs
Output Sink Current
Output Swing vs Load Resistance
LOAD RESISTANCE (Ω)
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
R
L
REFLO = GND
X1/X2 = GND
DAC CODE = FFF
H
LOAD RESISTANCE (Ω)
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 = OOO
H
R
L
V
CC
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
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