Datasheet

7
LTC1273
LTC1275/LTC1276
127356fa
INPUT FREQUENCY (Hz)
10k
0
EFFECTIVE NUMBER OF BITS
3
5
7
10
100k 2M
LTC1273/75/76 • TPC04
1
4
6
9
12
11
8
2
1M
62
56
74
68
50
S/(N + D) (dB)
f
SAMPLE
= 300kHz
ENOBs and S/(N + D)
vs Input Frequency
INPUT FREQUENCY (Hz)
1k
0
SIGNAL-TO-NOISE RATIO (dB)
10k 1M
LTC1273/75/76 • TPC05
80
100k
f
SAMPLE
= 300kHz
70
60
50
40
30
20
10
Signal-to-Noise Ratio (Without
Harmonics) vs Input Frequency Distortion vs Input Frequency
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
CODE
0
–1.0
INL ERROR (LSB)
–0.5
0
0.5
1.0
512 1024 1536 2048
LTC1273/75/76 • TPC01
2560 3072 3584 4096
Integral Nonlinearity
TEMPERATURE (°C)
–50
0
SUPPLY CURRENT (mA)
10
25
0
50
75
LTC1273/75/76 • TPC03
5
20
15
–25
25
100
125
CODE
0
–1.0
DNL ERROR (LSB)
–0.5
0
0.5
1.0
512 1024 1536 2048
LTC1273/75/76 • TPC02
2560 3072 3584 4096
Differential Nonlinearity Supply Current vs Temperature
Power Supply Feedthrough
vs Ripple Frequency (LTC1273)
RIPPLE FREQUENCY (Hz)
1k
–120
AMPLITUDE OF POWER SUPPLY FEEDTHROUGH (dB)
–40
–20
0
10k 100k 1M
LTC1273/75/76 • TPC07
–60
–80
–100
V
DD
(V
RIPPLE
= 1mV)
DGND
(V
RIPPLE
= 0.1V)
f
SAMPLE
= 300kHz
Power Supply Feedthrough
vs Ripple Frequency (LTC1275/76)
RIPPLE FREQUENCY (Hz)
1k
–120
AMPLITUDE OF POWER SUPPLY FEEDTHROUGH (dB)
–40
–20
0
10k 100k 1M
LTC1273/75/76 • TPC08
–60
–80
–100
f
SAMPLE
= 300kHz
V
DD
(V
RIPPLE
= 1mV)
DGND
(V
RIPPLE
= 0.1V)
V
SS
(V
RIPPLE
= 10mV)
INPUT FREQUENCY (Hz)
–80
AMPLITUDE (dB BELOW THE FUNDAMENTAL)
–60
–40
–20
0
1k 100k 1M 10M
LTC1273/75/76 • TPC06
–100
10k
–90
–70
–50
–30
–10
f
SAMPLE
= 300kHz
THD
2nd HARMONIC
3rd HARMONIC