5
LTC1450/LTC1450L
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
LOGIC INPUT VOLTAGE (V)
0
0.3 0.6 0.9 1.2
SUPPLY
CURRENT
(
A) 1200
1600
1450/50L G04
800
400
0
1400
1000
600
200
1.5 1.8 2.1 2.4 2.7 3.0
VCC = 3V
ALL LOGIC INPUTS
TIED TOGETHER
LTC1450L Supply Current
vs Logic Input Voltage
LTC1450 Output Swing
vs Load Resistance
LOAD RESISTANCE (
)
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
RL TIED TO GND
ZERO SCALE
RL TIED TO VCC
VCC = 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
VOUT
CODE = FFFH
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
VCC = 5V
VREFHI = 2VP-P
VOUT = 4VP-P
5ms/DIV
1mV/DIV
1450/50L G12
CODE = FFFH
X1/X2 = GND
BW = 3Hz to 1.2MHz
TOTAL = 0.35mVRMS