LTC1279 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC1279' PDF : 16 Pages View PDF
LTC1279
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 = 600kHz
0
10k
100k
1M
INPUT FREQUENCY (Hz)
10M
1279 G04
Peak Harmonic or Spurious
Noise vs Input Frequency
0
–10 fSAMPLE = 600kHz
–20
–30
–40
–50
–60
–70
–80
–90
–100
10k
100k
1M 2M
INPUT FREQUENCY (Hz)
1279 G07
Supply Current vs Temperature
15
12
9
6
3
fSAMPLE = 600kHz
0
–55 –25 0 25 50 75
TEMPERATURE (°C)
100 125
1279 G10
Signal-to-Noise Ratio (Without
Harmonics) vs Input Frequency
80
70
60
50
40
30
20
10
fSAMPLE = 600kHz
0
10k
100k
1M
INPUT FREQUENCY (Hz)
10M
1279 G05
Intermodulation Distortion Plot
0
–10
(fa) (fb)
fSAMPLE = 600kHz
fa = 94.189kHz
–20
fb = 97.705kHz
–30
–40
–50
–60
–70 (2fa – fb)
–80 (fb – fa)
–90
–100
(3fb)
(fa + 2fb)
(2fb – fa) (fa + fb)(2fa + fb)
(2fa) (2fb)
(3fa)
–110
–120
0
50 100 150 200 250 300
FREQUENCY (kHz)
1279 G08
Power Supply Feedthrough vs
Ripple Frequency
0
fSAMPLE = 600kHz
–20
–40
–60
VSS(VRIPPLE = 10mV)
DGND(VRIPPLE = 100mV)
–80
–100
–120
1k
AVDD(VRIPPLE = 1mV)
10k
100k
RIPPLE FREQUENCY (Hz)
1M
1279 G11
Distortion vs Input Frequency
0
–10 fSAMPLE = 600kHz
–20
–30
–40
–50
–60
–70
2ND HARMONIC
–80
THD
–90
3RD HARMONIC
–100
10k
100k
1M 2M
INPUT FREQUENCY (Hz)
1279 G06
Acquisition Time vs
Source Impedance
2500
TA = 25°C
2000
1500
1000
500
0
10
100
1k
10k
SOURCE RESISTANCE (Ω)
1279 G09
Reference Voltage vs
Load Current
2.435
2.430
2.425
2.420
2.415
2.410
2.405
2.400
2.395
2.390
–8 –7 –6 –5 –4 –3 –2 –1 0 1 2
LOAD CURRENT (mA)
1279 G12
6
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