SPT7851 Просмотр технического описания (PDF) - Cadeka Microcircuits LLC.
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SPT7851 Datasheet PDF : 9 Pages
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DATA SHEET
SPT7851
Typical Performance Characteristics
(TA = TMIN–TMAX, VDD1 = VDD2 = VDD3 = 3.3V, VREF– = 1.0V, VREF+ = 2.0V, Common Mode Voltage = 1.65, ƒCLK = 20 MSPS,
Bias1 = 90µA, Bias2 = 9.5µA, Differential Input, Duty Cycle = 50%; unless otherwise noted)
THD, SNR, SINAD vs. Input Frequency
80
70
SNR
60
50
THD
SINAD
40
30
20
100
101
102
Input Frequency (MHz)
THD, SNR, SINAD vs. Temperature
70
68
THD
66
64
62
60
SNR
58
SINAD
56
-40 -25 0 25 50 70 85
Temperature ( °C)
Bias1 Voltage vs. Bias1 Current
3.4
IBias1 VBias1
3.2
30 2.19
60 2.53
90 2.79
3.0
120
3
150 3.22
2.8
2.6
2.4
2.2
2.0
0
30 60 90 120 150 180
IBIAS1 (µA)
THD, SNR, SINAD vs. Sample Rate
80
70
THD
60
SNR
SINAD
50
40
30
NOTE: Bias1 and Bias2 currents
optimized for each sample rate
20
100
101
102
Sample Rate (MSPS)
Power Dissipation vs. Sample Rate
150
125
100
75
50
25
NOTE: Bias1 and Bias2 currents
optimized for each sample rate
0
100
101
102
Sample Rate (MSPS)
Bias2 Voltage vs. Bias2 Current
0.90
IBias2 VBias2
3 0.6975
0.85
6 0.7535
9 0.796
12 0.8295
0.80
15 0.8595
0.75
0.70
0.65
0.60
0
3
6
9
12 15 18
IBIAS2 (µA)
4
REV. 1B October 2003
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