ADS7861 Datasheet, PDF (5/15 Pages) Burr-Brown (TI) – Dual, 500kHz, 12-Bit, 2 2 Channel, Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTER

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