Datasheet

ADS7806
5
SBAS021B
www.ti.com
TYPICAL CHARACTERISTICS
T
A
= +25°C, f
S
= 40kHz, V
DIG
= V
ANA
= +5V, and using internal reference and fixed resistors (see Figure 7b), unless otherwise specified.
FREQUENCY SPECTRUM
(8192 Point FFT; f
IN
= 1kHz, 0dB)
Frequency (kHz)
Amplitude (dB)
0
–20
–40
–60
–80
–100
–120
0 5 10 15 20
FREQUENCY SPECTRUM
(8192 Point FFT; f
IN
= 15kHz, 0dB)
Frequency (kHz)
Amplitude (dB)
0
–20
–40
–60
–80
–100
–120
0 5 10 15 20
SIGNAL-TO-(NOISE + DISTORTION)
vs INPUT FREQUENCY (f
IN
= 0dB)
90
80
70
60
50
40
30
20
10
SINAD (dB)
100 1k 10k 100k 1M
Input Signal Frequency (Hz)
SIGNAL-TO-(NOISE + DISTORTION)
vs INPUT FREQUENCY AND INPUT AMPLITUDE
90
80
70
60
50
40
30
20
10
0
SINAD (dB)
02468101214161820
Input Signal Frequency (kHz)
0dB
–20dB
–60dB
10kHz
20kHz
30kHz
40kHz
SIGNAL-TO-(NOISE + DISTORTION) vs TEMPERATURE
(f
IN
= 1kHz, 0dB; f
S
= 10kHz to 40kHz)
74.0
73.9
73.8
73.7
73.6
–75 –50 –25 0 25 50 75 100 125 150
Temperature (°C)
SINAD (dB)
AC PARAMETERS vs TEMPERATURE
(f
IN
= 1kHz, 0dB)
110
105
100
95
90
85
80
75
70
65
60
–60
–65
–70
–75
–80
–85
–90
–95
–100
–105
–110
SFDR, SNR, and SINAD (dB)
THD (dB)
–75 –50 –25 0 25 50 75 100 125 150
Temperature (°C)
SFDR
SNR and SINAD
THD