LTC1279 LINER [Linear Technology], LTC1279 Datasheet - Page 6

• Manufacturer Part Number: LTC1279
• Description: 12-Bit, 600ksps Sampling A/D Converter with Shutdown
• Manufacturer: LINER [Linear Technology]

LTC1279
TYPICAL PERFORMANCE CHARACTERISTICS
6
–100
–10
–20
–30
–40
–50
–60
–70
–80
–90
15
12
80
70
60
50
40
30
20
10
9
6
3
0
0
0
–55
10k
10k
Supply Current vs Temperature
S/(N + D) vs Input Frequency
and Amplitude
Peak Harmonic or Spurious
Noise vs Input Frequency
f
f
f
SAMPLE
SAMPLE
SAMPLE
–25
= 600kHz
INPUT FREQUENCY (Hz)
= 600kHz
INPUT FREQUENCY (Hz)
= 600kHz
0
TEMPERATURE ( C)
100k
V
V
100k
25
IN
IN
= –20dB
= –60dB
V
IN
50
= 0dB
1M
75
W
100
1M
1279 G04
1279 G07
1279 G10
U
10M
125
2M
–100
–110
–120
–100
–120
–10
–20
–30
–40
–50
–60
–70
–80
–90
–20
–40
–60
–80
80
70
60
50
40
30
20
10
0
0
0
10k
1k
0
Signal-to-Noise Ratio (Without
Harmonics) vs Input Frequency
Intermodulation Distortion Plot
Power Supply Feedthrough vs
Ripple Frequency
DGND(V
(fb – fa)
f
f
SAMPLE
SAMPLE
(2fa – fb)
50
RIPPLE
RIPPLE FREQUENCY (Hz)
(fa) (fb)
= 600kHz
= 600kHz
INPUT FREQUENCY (Hz)
100k
100
10k
FREQUENCY (kHz)
= 100mV)
(2fb – fa)
A
VDD
150
(2fa)
V
(V
SS
f
fa = 94.189kHz
fb = 97.705kHz
(fa + fb)(2fa + fb)
SAMPLE
RIPPLE
(V
100k
200
1M
RIPPLE
(2fb)
(fa + 2fb)
= 1mV)
= 600kHz
(3fa)
= 10mV)
250
(3fb)
1279 G11
1279 G05
1279 G08
10M
300
1M
2.435
2.430
2.425
2.420
2.415
2.410
2.405
2.400
2.395
2.390
–100
2500
2000
1500
1000
–10
–20
–30
–40
–50
–60
–70
–80
–90
500
0
0
10k
–8
10
Distortion vs Input Frequency
Acquisition Time vs
Source Impedance
Reference Voltage vs
Load Current
f
SAMPLE
–7
T
THD
A
= 25 C
–6
2ND HARMONIC
SOURCE RESISTANCE ( )
= 600kHz
INPUT FREQUENCY (Hz)
LOAD CURRENT (mA)
–5
100
–4 –3
100k
–2 –1
3RD HARMONIC
1k
0
1M
1279 G06
1279 G09
1279 G12
1
10k
2M
2