Datasheet

4
LTC1257
TYPICAL PERFORMANCE CHARACTERISTICS
UW
TEMPERATURE (°C)
–50

0.38
0.37
0.36
0.35
0.34
0.33
0.32
0.31
25 75
1257 G03
–25 0
50 100 125
SUPPLY CURRENT (mA)
V
CC
= 5.25V
V
CC
= 5V
V
CC
= 4.75V
Supply Current vs Temperature
OUTPUT SINK CURRENT (µA)
1
OUTPUT PULL-DOWN VOLTAGE (mV)
1000
100
10
1
0.1

10 100 1000
1257 G06
HOT
COLD
ROOM
Pull-Down Voltage vs Output Sink
Current Capability
TEMPERATURE (°C)
–50
FULL-SCALE VOLTAGE (V)
2.0495
2.0490
2.0485
2.0480
2.0475
2.0470
2.0465

25 75
1257 G07
–25 0
50 100 125
V
CC
= 5V
INTERNAL REFERENCE
OUTPUT LOAD CURRENT (mA)
0.01
MINIMUM SUPPLY VOLTAGE (V)
0.1 1 10
1257 G01
5.0
4.8
4.6
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
V
REF
= INTERNAL
V
OUT
= FULL SCALE
T
A
= 25°C
Minimum Supply Voltage
vs Load Current #1
LOGIC VOLTAGE (V)
0
SUPPLY CURRENT (mA)
0.59
0.54
0.49
0.44
0.39
0.34
4
1257 G04
1
2
3
5
V
CC
= 5V
T
A
= 25°C
Minimum Supply Voltage
vs Load Current #2
OUTPUT LOAD CURRENT (mA)
0.01
MINIMUM SUPPLY VOLTAGE (V)
0.1 1 10
1257 G02
15.0
14.5
14.0
13.5
13.0
12.5
12.0
11.5
11.0
V
REF
= 10V
V
OUT
= FULL SCALE
T
A
= 25°C
LOAD RESISTANCE (Ω)
10
OUTPUT VOLTAGE SWING (V)
100 1k 10k
1257 G05
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
FULL SCALE
R
L
TIED TO GND
ZERO SCALE
R
L
TIED TO V
CC
V
CC
= 5V
Output Swing vs Load Resistance
Supply Current vs
Logic Input Voltage
Full-Scale Voltage vs
Temperature
TEMPERATURE (°C)
–50 –25 25 50
ZERO-SCALE VOLTAGE (mV)
75 100
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1257 G08
0 125
V
CC
= 5V
INTERNAL REFERENCE
Zero-Scale Voltage vs
Temperature
CODE
0
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
1257 G09
512 1536
3072
3584
4096

V
CC
= 5V
INTERNAL REFERENCE
T
A
= 25°C
Integral Nonlinearity (INL)