Datasheet

ADS7805
5
SBAS020D
www.ti.com
3
2
1
0
–1
–2
–3
16-Bit LSBs
3
2
1
0
–1
–2
–3
16-Bit LSBs
0 8192 16384 24576 32768
LINEARITY vs CODE
Decimal Code
40960 49152 57344 65535
0 8192 16384 24576 32768
Decimal Code
40960 49152 57344 65535
All Codes INL
All Codes DNL
TYPICAL CHARACTERISTICS
T
A
= +25°C, f
S
= 100kHz, V
DIG
= V
ANA
= +5V, using internal reference and fixed resistors shown in Figure 6b, unless otherwise specified.
FREQUENCY SPECTRUM
(8192 Point FFT; f
IN
= 20kHz, 0dB)
Frequency (kHz)
Amplitude (dB)
0
–20
–40
–60
–80
–100
–120
–140
0.0 12.5 25.0 37.5 50.0
FREQUENCY SPECTRUM
(8192 Point FFT; f
IN
= 45kHz, 0dB)
Frequency (kHz)
Amplitude (dB)
0
–20
–40
–60
–80
–100
–120
–140
0.0 12.5 25.0 37.5 50.0
50kHz
SIGNAL-TO-(NOISE + DISTORTION) vs TEMPERATURE
(f
IN
= 20kHz, 0dB; f
S
= 50kHz, 100kHz)
100.0
95.0
90.0
85.0
80.0
75.0
–50 –25 0 25 50 75 100 125 150
Temperature (°C)
SINAD (dB)
100kHz
SIGNAL-TO-(NOISE + DISTORTION)
vs INPUT FREQUENCY AND INPUT AMPLITUDE
90
80
70
60
50
40
30
20
10
0
SINAD (dB)
0 5 10 15 20 25 30 35 40 45
Input Signal Frequency (kHz)
0dB
–20dB
–60dB
AC PARAMETERS vs TEMPERATURE
(f
IN
= 20kHz, 0dB)
110
105
100
95
90
85
80
–80
–85
–90
–95
–100
–105
–110
SFDR, SNR, and SINAD (dB)
THD (dB)
–50 –25 0 25 50 75 100 125 150
Temperature (°C)
SFDR
SNR
THD
SINAD