LTC1278 Просмотр технического описания (PDF) - Linear Technology
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LTC1278 Datasheet PDF : 16 Pages
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LTC1278
TYPICAL PERFORMANCE CHARACTERISTICS
S/(N + D) vs Input Frequency
and Amplitude
80
VIN = 0dB
70
60
VIN = –20dB
50
40
30
20
VIN = –60dB
10
fSAMPLE = 500kHz
0
1k
10k
100k
1M
10M
INPUT FREQUENCY (Hz)
LTC1278 G10
Spurious Free Dynamic Range vs
Input Frequency
0
–10 fSAMPLE = 500kHz
–20
–30
–40
–50
–60
–70
–80
–90
–100
10k
100k
1M 2M
INPUT FREQUENCY (Hz)
LTLTC1278 G11
Supply Current vs Temperature
20
fSAMPLE = 500kHz
15
10
5
0
–55 –25
0 25 50 75 100 125
TEMPERATURE (C°)
LTC1278 G3
Signal-to-Noise Ratio (without
Harmonics) vs Input Frequency
80
70
60
50
40
30
20
10
fSAMPLE = 500kHz
0
1k
10k
100k
1M
INPUT FREQUENCY (Hz)
10M
LTC1278 G5
Intermodulation Distortion Plot
0
fSAMPLE = 500kHz
–20
fIN1 = 96.80kHz
fIN2 = 101.68kHz
–40
–60
–80
–100
–120
0
50k 100k 150k 200k 250k
FREQUENCY (Hz)
LTC1278 G8
Power Supply Feedthrough
vs Ripple Frequency
0
fSAMPLE = 500kHz
–20
–40
VSS (VRIPPLE = 10mV)
–60
DGND (VRIPPLE = 0.1V)
–80
–100
AVDD (VRIPPLE = 1mV)
–120
1k
10k
100k
1M
RIPPLE FREQUENCY (Hz)
LTC1278 G7
Distortion vs Input Frequency
0
fSAMPLE = 500kHz
–10
–20
–30
–40
–50
–60
–70
2ND HARMONIC
–80
THD
–90
3RD HARMONIC
–100
10k
100k
INPUT FREQUENCY (Hz)
1M 2M
LT1278 G6
Acquisition Time vs
Source Impedance
4500
4000
3500
3000
2500
2000
1500
1000
500
0
10
100
1k
RSOURCE (Ω)
10k
LTC1278 G9
Reference Voltage vs Load Current
2.435
2.430
2.425
2.420
2.415
2.410
2.405
–5 –4
–3 –2 –1 0
LOAD CURRENT (mA)
12
LTC1278 G12
6
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