SBAS469B
–
MARCH 2009
–
REVISED SEPTEMBER 2011
TYPICAL CHARACTERISTICS, V
CC
= 2.7 V
V
CC
= 2.7 V, T
A
= 25°C, V
REF
= 2.5 V, f
SAMPLE
= 125 kHz, f
CLK
= 16
×
f
SAMPLE
= 2 MHz (unless otherwise noted)
FREQUENCY SPECTRUM
(4096 Point FFT; f IN = 1,129Hz, –0.2dB)
0
–20
–40
–60
–80
–100
–120
0
15.6
31.3
Frequency (kHz)
SIGNAL-TO-NOISE RATIO AND SIGNAL-TO-
(NOISE+DISTORTION) vs INPUT FREQUENCY
78
SNR
74
FREQUENCY SPECTRUM
(4096 Point FFT; f IN = 10.6kHz, –0.2dB)
0
–20
Amplitude (dB)
Amplitude (dB)
–40
–60
–80
–100
–120
46.9
62.5
0
15.6
31.3
Frequency (kHz)
46.9
62.5
SPURIOUS-FREE DYNAMIC RANGE AND TOTAL
HARMONIC DISTORTION vs INPUT FREQUENCY
–90
85
80
SFDR
–85
–80
SNR and SINAD (dB)
SFDR (dB)
70
66
SINAD
62
58
54
1
10
Input Frequency (kHz)
100
70
65
60
55
50
1
10
THD
–70
–65
–60
–55
–50
100
Input Frequency (kHz)
CHANGE IN SIGNAL-TO-(NOISE+DISTORTION)
vs TEMPERATURE
0.4
0.2
f
IN
= 10kHz, –0.2dB
EFFECTIVE NUMBER OF BITS
vs INPUT FREQUENCY
12.0
11.5
Effective Number of Bits
Delta from 25°C (dB)
11.0
10.5
10.0
9.5
9.0
1
10
Input Frequency (kHz)
100
0.0
–0.2
–0.4
–0.6
–0.8
–40
–20
0
20
40
60
80
100
Temperature (°C)
Copyright
©
2009–2011, Texas Instruments Incorporated
Product Folder Link(s):
THD (dB)
75
–75
7
TI [ TEXAS INSTRUMENTS ]
