Datasheet

5
LTC1450/LTC1450L
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
LOGIC INPUT VOLTAGE (V)
0 0.3 0.6 0.9 1.2
SUPPLY CURRENT (µA)
1200
1600
1450/50L G04
800
400
0
1400
1000
600
200
1.5 1.8 2.1 2.4 2.7
3.0
V
CC
= 3V
ALL LOGIC INPUTS
TIED TOGETHER
LTC1450L Supply Current
vs Logic Input Voltage
LTC1450 Output Swing
vs Load Resistance
LOAD RESISTANCE (Ω)
10
OUTPUT SWING (V)
100 1k 10k
1450/50L G05
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 SINK CURRENT (mA)
OUTPUT PULL-DOWN VOLTAGE (mV)
1000
100
10
1
0.1
0.0001 0.1 1 10 100
1450/50L G06
0.001 0.01
125°C
–55°C
25°C
LTC1450 Pull-Down Voltage vs
Output Sink Current Capability
LTC1450 Output Offset Voltage
vs Temperature
LTC1450
Integral Nonlinearity (INL)
TEMPERATURE (°C)
–55
0
OUTPUT OFFSET VOLTAGE (mV)
0.5
1.5
2.0
2.5
5.0
3.5
–15
25
45 125
1450/50L G07
1.0
4.0
4.5
3.0
–35 5
65
85
105
LTC1450
Differential Nonlinearity (DNL)
CODE
0
–0.2
DNL ERROR (LSB)
0
0.2
1024
2048
2560
1450/50L G08
512 1536
3072
3584
4095
CODE
0
–2
ERROR (LSB)
0
2
1024
2048
2560
1450/50L G09
512 1536
3072
3584
4095
LTC1450
Broadband Output Noise
LTC1450 Total Harmonic
Distortion + Noise vs Frequency
FREQUENCY (Hz)
20
PSRR (dB)
30
50
60
80
90
10 100 10k 10M
1450/50L G10
10
1
1k
70
40
0
REFOUT
V
OUT
CODE = FFF
H
Power Supply Rejection
vs Frequency
FREQUENCY (Hz)
TOTAL HARMONIC DISTORTION + NOISE (dB)
–40
–50
–60
–70
–80
–90
–100
100 10k 100k
1450/50L G11
1k
V
CC
= 5V
V
REFHI
= 2V
P-P

V
OUT
= 4V
P-P
5ms/DIV
1mV/DIV
1450/50L G12
CODE = FFF
H

X1/X2 = GND
BW = 3Hz to 1.2MHz
TOTAL = 0.35mV
RMS