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