TYPICAL PERFORMANCE CURVES
At TA = +25°C, +VA + VD = +5V, and VREF = internal +2.5V, fCLK = 8MHz, fSAMPLE = 500kHz, unless otherwise noted.
FREQUENCY SPECTRUM
(4096 Point FFT; fIN = 99.9kHz, –0.5dB)
FREQUENCY SPECTRUM
(4096 Point FFT; fIN = 199.9kHz, –0.5dB)
0
–20
0
–20
–40
–40
–60
–60
–80
–80
–100
–120
–100
–120
0
62.5
125
187.5
250
0
62.5
125
187.5
250
Frequency (kHz)
Frequency (kHz)
SIGNAL-TO-NOISE RATIO and
SIGNAL-TO-(NOISE+DISTORTION)
vs INPUT FREQUENCY
CHANGE IN SIGNAL-TO-NOISE RATIO
AND SIGNAL-TO-(NOISE+DISTORTION)
vs TEMPERATURE
76
74
72
70
68
66
64
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
SNR
SINAD
SINAD
SNR
–0.1
1k
10k
100k
1M
–40
25
85
Input Frequency (Hz)
Temperature (°C)
CHANGE IN POSITIVE GAIN MATCH
vs TEMPERATURE
(Maximum Deviation for All Four Channels)
CHANGE IN SPURIOUS FREE DYNAMIC RANGE
AND TOTAL HARMONIC DISTORTION
vs TEMPERATURE
7
6
+1
0.6
0.5
0.4
0.3
0.2
0.1
0
0
5
–0.5
–1
THD
4
3
–1.5
–2
2
SFDR
1
–2.5
–3
0
–1
–3.5
–40
25
85
–40
25
85
Temperature (°C)
150
Temperature (°C)
®
ADS7861
5
BB [ BURR-BROWN CORPORATION ]
